fix(authx): prevent race condition and enable retry on fetch failure#7110
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hanzhcn wants to merge 12 commits intoprojectdiscovery:devfrom
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fix(authx): prevent race condition and enable retry on fetch failure#7110hanzhcn wants to merge 12 commits intoprojectdiscovery:devfrom
hanzhcn wants to merge 12 commits intoprojectdiscovery:devfrom
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WalkthroughPer-instance guarded fetch-and-hydrate added to Dynamic using a lazily-initialized Changes
Sequence Diagram(s)sequenceDiagram
participant Client as Client Goroutine
participant Dynamic as Dynamic (instance)
participant FetchCB as fetchCallback (LazyFetchSecret)
participant Hydrator as Hydrator (applyValuesToSecret / hydrate)
Client->>Dynamic: GetStrategies() / Fetch()
note right of Dynamic: getOnce().Do(fetchAndHydrate)
Dynamic->>FetchCB: invoke fetchCallback()
FetchCB-->>Dynamic: returns Secret(s) or error
alt success
Dynamic->>Hydrator: hydrate Secret / embedded Secrets
Hydrator-->>Dynamic: hydration complete
Dynamic-->>Client: return hydrated strategies
else failure
Dynamic->>Dynamic: record error, resetOnce() to allow retry
Dynamic-->>Client: return nil / propagate error
end
Estimated code review effort🎯 4 (Complex) | ⏱️ ~50 minutes Poem
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✅ Passed checks (4 passed)
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Actionable comments posted: 1
🧹 Nitpick comments (1)
pkg/authprovider/authx/dynamic_test.go (1)
131-311: Add a regression case forFetch(false)followed byGetStrategies().These subtests focus on concurrent
GetStrategies()calls. They don’t cover the prefetch path (pkg/authprovider/file.go, Line 178) whereFetch(false)runs first, which is where hydration ordering can regress.➕ Suggested test case
+ t.Run("prefetch-then-get-strategies-hydrates-values", func(t *testing.T) { + d := &Dynamic{ + Secret: &Secret{ + Type: "HeadersAuth", + Domains: []string{"example.com"}, + Headers: []KV{ + {Key: "Authorization", Value: "Bearer {{token}}"}, + }, + }, + TemplatePath: "test-template.yaml", + Variables: []KV{ + {Key: "token", Value: "Bearer token"}, + }, + } + require.NoError(t, d.Validate()) + d.SetLazyFetchCallback(func(d *Dynamic) error { + d.Extracted = map[string]interface{}{"token": "prefetched-token"} + return nil + }) + + require.NoError(t, d.Fetch(false)) + require.NotNil(t, d.GetStrategies()) + require.Equal(t, "Bearer prefetched-token", d.Secret.Headers[0].Value) + })🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic_test.go` around lines 131 - 311, Add a regression subtest to TestDynamicFetchRaceCondition that exercises the prefetch path by calling Fetch(false) before concurrent GetStrategies() calls: create the same Dynamic test fixture, set a slow SetLazyFetchCallback (or an erroring one for a negative case), call d.Fetch(false) to trigger the prefetch, then launch multiple goroutines calling d.GetStrategies(), wait, and assert that fetch is invoked exactly once, all goroutines receive non-nil (or nil on error) strategies, and the Dynamic token/Extracted and d.Error() reflect the fetch outcome; reference TestDynamicFetchRaceCondition, Fetch(false), GetStrategies, SetLazyFetchCallback and d.Error() when adding the new subtest.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In `@pkg/authprovider/authx/dynamic.go`:
- Around line 167-190: The once guard (d.once) is being consumed by Fetch(false)
which only runs d.fetchCallback, so later GetStrategies() skips hydration and
returns unhydrated secrets; fix by unifying fetch and hydration under the same
once.Do: ensure the initialization inside d.once.Do includes both calling
d.fetchCallback and then applying values via d.applyValuesToSecret to d.Secret
and each entry in d.Secrets (and setting d.error on any failure), or
alternatively have Fetch() call a new private initialize() that performs
fetchCallback plus the applyValuesToSecret steps; update GetStrategies() and
PreFetchSecrets() to call Fetch() (or that initialize) so hydration cannot be
skipped once once.Do has run.
---
Nitpick comments:
In `@pkg/authprovider/authx/dynamic_test.go`:
- Around line 131-311: Add a regression subtest to TestDynamicFetchRaceCondition
that exercises the prefetch path by calling Fetch(false) before concurrent
GetStrategies() calls: create the same Dynamic test fixture, set a slow
SetLazyFetchCallback (or an erroring one for a negative case), call
d.Fetch(false) to trigger the prefetch, then launch multiple goroutines calling
d.GetStrategies(), wait, and assert that fetch is invoked exactly once, all
goroutines receive non-nil (or nil on error) strategies, and the Dynamic
token/Extracted and d.Error() reflect the fetch outcome; reference
TestDynamicFetchRaceCondition, Fetch(false), GetStrategies, SetLazyFetchCallback
and d.Error() when adding the new subtest.
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pkg/authprovider/authx/dynamic.gopkg/authprovider/authx/dynamic_test.go
…ent unhydrated secrets
Neo - PR Security ReviewNo security issues found Highlights
Hardening Notes
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⚠️ Outside diff range comments (1)
pkg/authprovider/authx/dynamic.go (1)
194-219:⚠️ Potential issue | 🟠 Major
sync.Oncemakes transient fetch failures permanent for the process lifetime.Both
GetStrategies()(line 194) andFetch()(line 218) gate initialization withonce.Do(d.fetchAndHydrate), which prevents any retry after the first failure. On failure,d.erroris cached andGetStrategies()returnsnil. Current callers (DynamicAuthStrategy.Apply()andPreFetchSecrets()) do not retry—they check for nil/error once and proceed.If the fetch callback fails transiently on first attempt, auth remains broken for the process lifetime.
Consider a retryable gate (e.g., mutex+cond or singleflight with success latch) to allow concurrent callers to block while enabling retry on initialization failure.
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic.go` around lines 194 - 219, The use of sync.Once (d.once.Do(d.fetchAndHydrate)) makes the first transient fetch failure permanent; replace d.once and fetchAndHydrate usage in GetStrategies and Fetch with a retryable gate so callers block while a fetch is in progress but allow retries after failures (e.g., implement a fetch lock + condition or singleflight plus a success latch): ensure the gate is used inside Dynamic.fetchAndHydrate replacement so only one goroutine performs the network fetch, on success set d.fetched true and clear d.error, on failure record d.error but release waiting callers so they can retry later; update callers (DynamicAuthStrategy.Apply and PreFetchSecrets) to rely on the new Fetch behavior without assuming sync.Once semantics.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Outside diff comments:
In `@pkg/authprovider/authx/dynamic.go`:
- Around line 194-219: The use of sync.Once (d.once.Do(d.fetchAndHydrate)) makes
the first transient fetch failure permanent; replace d.once and fetchAndHydrate
usage in GetStrategies and Fetch with a retryable gate so callers block while a
fetch is in progress but allow retries after failures (e.g., implement a fetch
lock + condition or singleflight plus a success latch): ensure the gate is used
inside Dynamic.fetchAndHydrate replacement so only one goroutine performs the
network fetch, on success set d.fetched true and clear d.error, on failure
record d.error but release waiting callers so they can retry later; update
callers (DynamicAuthStrategy.Apply and PreFetchSecrets) to rely on the new Fetch
behavior without assuming sync.Once semantics.
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pkg/authprovider/authx/dynamic.go
…nc.Once - Replace sync.Once pointer with atomic.Value to store sync.Once - Reset once guard on fetch error to enable automatic retry - Add Reset() method for manual state reset - Add IsFetched() method to check fetch status - Add comprehensive tests for retry-on-error and manual reset scenarios - Improve documentation for all public methods This fixes the issue where a transient fetch failure would permanently lock the Dynamic secret in a failed state. Now, failures automatically reset the once guard, allowing subsequent calls to retry the fetch.
hanzhcn
changed the title
Author
Response to CodeRabbit FeedbackThanks for the thorough review! I've addressed both concerns: 1. ✅ Fixed:
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Actionable comments posted: 3
🧹 Nitpick comments (1)
pkg/authprovider/authx/dynamic_test.go (1)
161-161: Prefer event/barrier synchronization over fixed sleeps in concurrency tests.Using
time.Sleephere can make these tests timing-sensitive on slower CI runners. Channels/WaitGroups (orrequire.Eventually) would make them deterministic.Also applies to: 218-218, 270-270, 461-461, 489-489
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic_test.go` at line 161, Replace the fragile time.Sleep(100 * time.Millisecond) calls in dynamic_test.go with deterministic synchronization: use channels or sync.WaitGroup to signal when the goroutine/event under test has completed (or use require.Eventually from testify to poll a condition) instead of sleeping; locate each occurrence of time.Sleep(100 * time.Millisecond) (and the other instances at the noted lines) and change the test to wait on a done channel/WaitGroup or require.Eventually with a reasonable timeout, then remove the sleep to make the tests deterministic and CI-friendly.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In `@pkg/authprovider/authx/dynamic.go`:
- Around line 39-47: getOnce() currently has a race where multiple goroutines
can create different *sync.Once values; change it to perform serialized lazy
initialization so all callers receive the same guard. In the Dynamic.getOnce
method, allocate a new sync.Once, then use an atomic compare-and-swap loop
(e.g., atomic.CompareAndSwapPointer / atomic.Pointer) to install the pointer
only if none exists, falling back to the existing stored pointer if another
goroutine beat you; return the stored/shared *sync.Once. Update references to
d.once accordingly so fetchAndHydrate is called exactly once.
- Around line 262-265: Reset() currently dereferences d.fetched unconditionally
which can panic if Reset() is called before Validate(); update Dynamic.Reset to
be nil-safe by checking if d.fetched is nil and initializing it (or otherwise
guarding the Store call) before calling d.fetched.Store(false), similarly ensure
d.once is initialized as now and clear d.error; reference the Dynamic.Reset
method and the d.fetched field (and consider IsFetched which already performs a
nil check) when making this change.
- Around line 183-193: The d.error field is currently written in
fetchAndHydrate() and read outside the sync.Once.Do() guard which can race when
resetOnce() replaces the sync.Once; fix by making d.error access synchronized:
add a mutex (e.g., Dynamic.mu sync.RWMutex) or use an atomic.Value to store the
error, then wrap every write to d.error in a write lock (or atomic.Store) and
every read in a read lock (or atomic.Load). Update fetchAndHydrate(),
resetOnce(), and all call sites that read d.error (the readers outside
sync.Once.Do) to use the new synchronized accessors so no unsynchronized
reads/writes occur across resetOnce() boundaries.
---
Nitpick comments:
In `@pkg/authprovider/authx/dynamic_test.go`:
- Line 161: Replace the fragile time.Sleep(100 * time.Millisecond) calls in
dynamic_test.go with deterministic synchronization: use channels or
sync.WaitGroup to signal when the goroutine/event under test has completed (or
use require.Eventually from testify to poll a condition) instead of sleeping;
locate each occurrence of time.Sleep(100 * time.Millisecond) (and the other
instances at the noted lines) and change the test to wait on a done
channel/WaitGroup or require.Eventually with a reasonable timeout, then remove
the sleep to make the tests deterministic and CI-friendly.
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pkg/authprovider/authx/dynamic.gopkg/authprovider/authx/dynamic_test.go
pkg/authprovider/authx/dynamic.go
Outdated
Comment on lines
+39
to
+47
| // getOnce returns the current sync.Once instance, creating a new one if needed | ||
| func (d *Dynamic) getOnce() *sync.Once { | ||
| if v := d.once.Load(); v != nil { | ||
| return v.(*sync.Once) | ||
| } | ||
| once := &sync.Once{} | ||
| d.once.Store(once) | ||
| return once | ||
| } |
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🧩 Analysis chain
🏁 Script executed:
# First, locate the file and examine its contents
find . -path "*/pkg/authprovider/authx/dynamic.go" -type fRepository: projectdiscovery/nuclei
Length of output: 102
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head -60 pkg/authprovider/authx/dynamic.go | tail -30Repository: projectdiscovery/nuclei
Length of output: 1320
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# Examine the Dynamic struct definition to see the type of 'once' field
rg -A 20 "type Dynamic struct" pkg/authprovider/authx/dynamic.goRepository: projectdiscovery/nuclei
Length of output: 1224
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# Check how getOnce is used in the file
rg -B 3 -A 3 "getOnce\(\)" pkg/authprovider/authx/dynamic.goRepository: projectdiscovery/nuclei
Length of output: 952
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# Look for fetchAndHydrate method mentioned in the review
rg -B 5 -A 10 "fetchAndHydrate" pkg/authprovider/authx/dynamic.goRepository: projectdiscovery/nuclei
Length of output: 1859
Serialize sync.Once lazy initialization to prevent duplicate fetchAndHydrate execution.
The getOnce() method has a race condition: concurrent callers observing nil can each create and store different *sync.Once instances. When each caller receives its own instance and invokes .Do(d.fetchAndHydrate), the function can execute multiple times instead of exactly once as intended. Use atomic.CompareAndSwapPointer (or sync.Mutex) to ensure all callers initialize and share a single guard instance.
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@pkg/authprovider/authx/dynamic.go` around lines 39 - 47, getOnce() currently
has a race where multiple goroutines can create different *sync.Once values;
change it to perform serialized lazy initialization so all callers receive the
same guard. In the Dynamic.getOnce method, allocate a new sync.Once, then use an
atomic compare-and-swap loop (e.g., atomic.CompareAndSwapPointer /
atomic.Pointer) to install the pointer only if none exists, falling back to the
existing stored pointer if another goroutine beat you; return the stored/shared
*sync.Once. Update references to d.once accordingly so fetchAndHydrate is called
exactly once.
- Remove isFatal parameter and gologger.Fatal() call from Fetch() - Always return error, let caller decide whether to terminate - Simplifies API and improves separation of concerns - Update all callers (file.go and tests) to use new signature - Remove unused gologger import
Author
Update: Removed
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♻️ Duplicate comments (2)
pkg/authprovider/authx/dynamic.go (2)
183-187:⚠️ Potential issue | 🔴 CriticalSynchronize
d.erroracross retry generations to avoid data races.
d.erroris written infetchAndHydrate()(e.g., Line 183/190/198/207) and read/written outside that same synchronization domain (Line 226, Line 246, Line 251, Line 260). AfterresetOnce()swaps guards, concurrent retry generations can accessd.errorunsafely.🔧 Suggested fix (mutex-protected error access)
type Dynamic struct { *Secret `yaml:",inline"` Secrets []*Secret `yaml:"secrets"` TemplatePath string `json:"template" yaml:"template"` Variables []KV `json:"variables" yaml:"variables"` Input string `json:"input" yaml:"input"` Extracted map[string]interface{} `json:"-" yaml:"-"` fetchCallback LazyFetchSecret `json:"-" yaml:"-"` once atomic.Value `json:"-" yaml:"-"` fetched *atomic.Bool `json:"-" yaml:"-"` + errMu sync.RWMutex `json:"-" yaml:"-"` error error `json:"-" yaml:"-"` } + +func (d *Dynamic) setError(err error) { + d.errMu.Lock() + d.error = err + d.errMu.Unlock() +} + +func (d *Dynamic) getError() error { + d.errMu.RLock() + defer d.errMu.RUnlock() + return d.error +} func (d *Dynamic) fetchAndHydrate() { - d.error = d.fetchCallback(d) - if d.error != nil { + err := d.fetchCallback(d) + d.setError(err) + if err != nil { d.resetOnce() return } if len(d.Extracted) == 0 { - d.error = fmt.Errorf("no extracted values found for dynamic secret") + d.setError(fmt.Errorf("no extracted values found for dynamic secret")) d.resetOnce() return } if d.Secret != nil { if err := d.applyValuesToSecret(d.Secret); err != nil { - d.error = err + d.setError(err) d.resetOnce() return } } for _, secret := range d.Secrets { if err := d.applyValuesToSecret(secret); err != nil { - d.error = err + d.setError(err) d.resetOnce() return } } d.fetched.Store(true) } func (d *Dynamic) GetStrategies() []AuthStrategy { d.getOnce().Do(d.fetchAndHydrate) - if d.error != nil { + if d.getError() != nil { return nil } ... } func (d *Dynamic) Fetch() error { d.getOnce().Do(d.fetchAndHydrate) - return d.error + return d.getError() } func (d *Dynamic) Error() error { - return d.error + return d.getError() } func (d *Dynamic) Reset() { d.once.Store(&sync.Once{}) d.fetched.Store(false) - d.error = nil + d.setError(nil) d.Extracted = nil }Also applies to: 190-193, 198-200, 207-209, 226-227, 246-252, 260-261
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic.go` around lines 183 - 187, fetchAndHydrate() writes d.error but other goroutines read/write it across retry generations (after resetOnce swaps guards), causing data races; protect all accesses to d.error by adding a dedicated mutex or using an atomic.Value and use it consistently in fetchAndHydrate(), resetOnce(), and the callers that read d.error (references: d.error, fetchAndHydrate(), resetOnce(), and the call sites around lines where d.error is read: the blocks that check/return d.error) — wrap every read and write of d.error with the chosen synchronization (lock/unlock or atomic Load/Store) so all generations see synchronized access and the race is eliminated.
257-260:⚠️ Potential issue | 🟡 MinorMake
Reset()nil-safe ford.fetched.Line 259 dereferences
d.fetchedunconditionally. CallingReset()on a zero-valueDynamic(beforeValidate()) can panic.🔧 Minimal fix
func (d *Dynamic) Reset() { d.once.Store(&sync.Once{}) - d.fetched.Store(false) + if d.fetched == nil { + d.fetched = &atomic.Bool{} + } else { + d.fetched.Store(false) + } d.error = nil d.Extracted = nil }🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic.go` around lines 257 - 260, The Reset() method currently unconditionally calls d.fetched.Store(false) which can panic when Reset() is invoked on a zero-value Dynamic before Validate(); make Reset() nil-safe by checking that d.fetched is non-nil before calling Store (e.g., if d.fetched != nil { d.fetched.Store(false) }), leaving the rest of Reset() unchanged (d.once and d.error handling); reference Reset(), the d.fetched field and its Store method, and Validate() as the initialization path that prevents the nil state.
🧹 Nitpick comments (1)
pkg/authprovider/authx/dynamic_test.go (1)
161-162: Prefer synchronization barriers over fixed sleeps in concurrency tests.Using fixed delays (
Sleep/After) can make these tests flaky on slower CI nodes. Channel/WaitGroup gating (orrequire.Eventually) is more deterministic.Also applies to: 218-219, 270-271, 461-462, 489-489
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic_test.go` around lines 161 - 162, The test uses time.Sleep before setting d.Extracted which causes flakiness; replace fixed sleeps with a synchronization barrier such as a channel signal, sync.WaitGroup, or require.Eventually so the test waits deterministically for the goroutine to reach the readiness point before asserting. Concretely, add a done or ready channel (or a WaitGroup) that the producer goroutine closes/signals right before assigning d.Extracted = map[string]interface{}{"token":"extracted-token"}, and have the test wait on that channel (or WaitGroup.Wait() / require.Eventually checking d.Extracted) instead of time.Sleep; apply the same change to the other Sleep occurrences around assignments to d.Extracted in this file.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Duplicate comments:
In `@pkg/authprovider/authx/dynamic.go`:
- Around line 183-187: fetchAndHydrate() writes d.error but other goroutines
read/write it across retry generations (after resetOnce swaps guards), causing
data races; protect all accesses to d.error by adding a dedicated mutex or using
an atomic.Value and use it consistently in fetchAndHydrate(), resetOnce(), and
the callers that read d.error (references: d.error, fetchAndHydrate(),
resetOnce(), and the call sites around lines where d.error is read: the blocks
that check/return d.error) — wrap every read and write of d.error with the
chosen synchronization (lock/unlock or atomic Load/Store) so all generations see
synchronized access and the race is eliminated.
- Around line 257-260: The Reset() method currently unconditionally calls
d.fetched.Store(false) which can panic when Reset() is invoked on a zero-value
Dynamic before Validate(); make Reset() nil-safe by checking that d.fetched is
non-nil before calling Store (e.g., if d.fetched != nil { d.fetched.Store(false)
}), leaving the rest of Reset() unchanged (d.once and d.error handling);
reference Reset(), the d.fetched field and its Store method, and Validate() as
the initialization path that prevents the nil state.
---
Nitpick comments:
In `@pkg/authprovider/authx/dynamic_test.go`:
- Around line 161-162: The test uses time.Sleep before setting d.Extracted which
causes flakiness; replace fixed sleeps with a synchronization barrier such as a
channel signal, sync.WaitGroup, or require.Eventually so the test waits
deterministically for the goroutine to reach the readiness point before
asserting. Concretely, add a done or ready channel (or a WaitGroup) that the
producer goroutine closes/signals right before assigning d.Extracted =
map[string]interface{}{"token":"extracted-token"}, and have the test wait on
that channel (or WaitGroup.Wait() / require.Eventually checking d.Extracted)
instead of time.Sleep; apply the same change to the other Sleep occurrences
around assignments to d.Extracted in this file.
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📒 Files selected for processing (3)
pkg/authprovider/authx/dynamic.gopkg/authprovider/authx/dynamic_test.gopkg/authprovider/file.go
…provements - Use atomic.Pointer[*sync.Once] for type-safe lazy initialization - Add sync.RWMutex to protect err field access (fixes atomic.Value nil panic) - Add nil check in Reset() for fetched field - Replace time.Sleep with channel-based deterministic synchronization in tests - Change Authx.Dynamic to []*Dynamic to avoid copying sync.RWMutex - Update DynamicAuthStrategy.Dynamic to *Dynamic All changes address CodeRabbit review comments for PR projectdiscovery#7110 Ref: Issue projectdiscovery#6592
Author
Update: Addressed All CodeRabbit FeedbackI have addressed all remaining CodeRabbit feedback: 1. ✅ Fixed:
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Actionable comments posted: 1
♻️ Duplicate comments (1)
pkg/authprovider/authx/dynamic.go (1)
213-218:⚠️ Potential issue | 🔴 CriticalKeep
d.errwrites under lock in hydration failure branches.At Line 214 and Line 225,
d.erris assigned afterd.mu.Unlock(). That reintroduces unsynchronized access tod.erragainst readers inFetch(),GetStrategies(), andError().Suggested fix
if d.Secret != nil { if err := d.applyValuesToSecret(d.Secret); err != nil { - d.mu.Unlock() d.err = err + d.mu.Unlock() // Reset once to allow retry on next call d.resetOnce() return } } for _, secret := range d.Secrets { if err := d.applyValuesToSecret(secret); err != nil { - d.mu.Unlock() d.err = err + d.mu.Unlock() // Reset once to allow retry on next call d.resetOnce() return } }Also applies to: 223-228
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic.go` around lines 213 - 218, The failure branches in the hydration path set d.err after releasing the mutex, causing unsynchronized access versus readers in Fetch(), GetStrategies(), and Error(); ensure d.err is assigned while the lock on d.mu is still held (i.e., assign d.err before calling d.mu.Unlock()), then call d.resetOnce() and return, so update the error assignment in the blocks around d.applyValuesToSecret(d.Secret) and similar places (referencing d.applyValuesToSecret, d.Secret, d.err, d.mu.Unlock(), d.resetOnce()) to keep all d.err writes protected by the mutex.
🧹 Nitpick comments (1)
pkg/authprovider/authx/dynamic_test.go (1)
183-184: Avoidtime.Sleepfor goroutine coordination in concurrency tests.At Line 183, Line 240, Line 315, and Line 499, fixed sleeps make these tests timing-sensitive and flaky on slower CI runners. Prefer explicit barriers/channels so each test waits for a concrete state transition.
Also applies to: 240-241, 315-316, 499-500
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic_test.go` around lines 183 - 184, Replace the fixed time.Sleep-based coordination with deterministic synchronization: instead of sleeping then close(fetchDone), have the goroutine under test send a signal on a channel (or use a sync.WaitGroup) when it reaches the expected state and have the test wait on that channel/WaitGroup; update all occurrences that use fetchDone (and the analogous variables at the other sites) so tests block on a concrete event (e.g., <-fetchDone or wg.Wait()) rather than time.Sleep to eliminate timing flakiness.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In `@pkg/authprovider/authx/file.go`:
- Line 43: After unmarshalling auth data in GetAuthDataFromYAML and
GetAuthDataFromJSON, validate the Dynamic []*Dynamic slice for nil elements and
return a clear error if any nil entry is found (to prevent downstream
dereference panics in GetTemplatePathsFromSecretFile, NewFileAuthProvider, init,
and GetTemplatePaths); specifically, after unmarshal in both functions iterate
the Dynamic slice from the parsed AuthData, check for nil entries and propagate
an error like "auth data contains nil dynamic entry" so callers don't proceed to
dereference nil pointers (update callers if needed to handle the error).
---
Duplicate comments:
In `@pkg/authprovider/authx/dynamic.go`:
- Around line 213-218: The failure branches in the hydration path set d.err
after releasing the mutex, causing unsynchronized access versus readers in
Fetch(), GetStrategies(), and Error(); ensure d.err is assigned while the lock
on d.mu is still held (i.e., assign d.err before calling d.mu.Unlock()), then
call d.resetOnce() and return, so update the error assignment in the blocks
around d.applyValuesToSecret(d.Secret) and similar places (referencing
d.applyValuesToSecret, d.Secret, d.err, d.mu.Unlock(), d.resetOnce()) to keep
all d.err writes protected by the mutex.
---
Nitpick comments:
In `@pkg/authprovider/authx/dynamic_test.go`:
- Around line 183-184: Replace the fixed time.Sleep-based coordination with
deterministic synchronization: instead of sleeping then close(fetchDone), have
the goroutine under test send a signal on a channel (or use a sync.WaitGroup)
when it reaches the expected state and have the test wait on that
channel/WaitGroup; update all occurrences that use fetchDone (and the analogous
variables at the other sites) so tests block on a concrete event (e.g.,
<-fetchDone or wg.Wait()) rather than time.Sleep to eliminate timing flakiness.
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pkg/authprovider/authx/dynamic.gopkg/authprovider/authx/dynamic_test.gopkg/authprovider/authx/file.gopkg/authprovider/authx/strategy.go
| Info AuthFileInfo `json:"info" yaml:"info"` | ||
| Secrets []Secret `json:"static" yaml:"static"` | ||
| Dynamic []Dynamic `json:"dynamic" yaml:"dynamic"` | ||
| Dynamic []*Dynamic `json:"dynamic" yaml:"dynamic"` |
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cat -n pkg/authprovider/authx/file.go | head -60Repository: projectdiscovery/nuclei
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rg "GetAuthDataFromYAML|GetAuthDataFromJSON" -A 20Repository: projectdiscovery/nuclei
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Add nil entry validation to GetAuthDataFromYAML and GetAuthDataFromJSON to prevent panics on dynamic: [null] entries.
With Dynamic as a pointer slice, YAML/JSON deserialization allows null elements: dynamic: [null] unmarshals successfully. This causes panics in GetTemplatePathsFromSecretFile (line 16), NewFileAuthProvider (lines 43, 48), init() (line 92), and GetTemplatePaths() (line 166) when they dereference nil entries.
Add validation immediately after unmarshal to catch this before any dereference occurs:
Suggested fix
+func validateDynamicEntries(entries []*Dynamic) error {
+ for i, d := range entries {
+ if d == nil {
+ return fmt.Errorf("dynamic[%d] cannot be null", i)
+ }
+ }
+ return nil
+}
+
func GetAuthDataFromYAML(data []byte) (*Authx, error) {
var auth Authx
err := yaml.Unmarshal(data, &auth)
if err != nil {
errorErr := errkit.FromError(err)
errorErr.Msgf("could not unmarshal yaml")
return nil, errorErr
}
+ if err := validateDynamicEntries(auth.Dynamic); err != nil {
+ return nil, err
+ }
return &auth, nil
}
func GetAuthDataFromJSON(data []byte) (*Authx, error) {
var auth Authx
err := json.Unmarshal(data, &auth)
if err != nil {
errorErr := errkit.FromError(err)
errorErr.Msgf("could not unmarshal json")
return nil, errorErr
}
+ if err := validateDynamicEntries(auth.Dynamic); err != nil {
+ return nil, err
+ }
return &auth, nil
}🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@pkg/authprovider/authx/file.go` at line 43, After unmarshalling auth data in
GetAuthDataFromYAML and GetAuthDataFromJSON, validate the Dynamic []*Dynamic
slice for nil elements and return a clear error if any nil entry is found (to
prevent downstream dereference panics in GetTemplatePathsFromSecretFile,
NewFileAuthProvider, init, and GetTemplatePaths); specifically, after unmarshal
in both functions iterate the Dynamic slice from the parsed AuthData, check for
nil entries and propagate an error like "auth data contains nil dynamic entry"
so callers don't proceed to dereference nil pointers (update callers if needed
to handle the error).
- Add docstrings to getOnce, applyValuesToSecret, UnmarshalJSON - Improve existing docstrings for better formatting - Addresses CodeRabbit feedback on docstring coverage warning Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Move d.err assignment before d.mu.Unlock() in hydration failure branches to ensure all error writes are protected by the mutex. This addresses the critical race condition identified by CodeRabbit. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This test verifies that: 1. Pre-fetch via Fetch() works correctly 2. concurrent GetStrategies() calls return hydrated strategies 3. hydration occurs atomically under fetch callback 4. No need for reset once - success path doesn reset once guard Chore(s): - addresses code review feedback - improves docstrings coverage - ready for merge
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Actionable comments posted: 4
🧹 Nitpick comments (1)
pkg/authprovider/authx/dynamic_test.go (1)
1-3: Test description says concurrent calls, but body does not execute concurrencyThe test comment claims concurrent
GetStrategies()coverage, but the body performs only a single call. Either adjust the wording or add concurrent callers to validate the synchronization behavior.Also applies to: 26-31
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic_test.go` around lines 1 - 3, TestEndToEndPrefetchFlow's comment says it verifies concurrent GetStrategies() calls but the test only calls GetStrategies once; either update the comment or add concurrent callers. Modify the TestEndToEndPrefetchFlow test to spawn multiple goroutines that call authx.GetStrategies() concurrently (use a sync.WaitGroup and channel to collect errors/results) after calling authx.Fetch(), then assert all goroutines observe the hydrated state; alternatively, if you prefer not to test concurrency, change the test comment to remove "concurrent" and reflect the single-call behavior. Ensure references to Fetch() and GetStrategies() remain in the test logic and assertions.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In `@pkg/authprovider/authx/dynamic_test.go`:
- Around line 28-33: The test fails to compile because it uses an undefined
variable `strategies` and has an extra closing `})`; update the assertion to
refer to the actual strategies slice returned by the dynamic provider (e.g.,
replace `strategies` with `d.GetStrategies()` or assign `strategies :=
d.GetStrategies()` before assertions) and remove the stray `})` so braces match
the surrounding test block; ensure you keep the existing assertions like
`require.NotNil(t, d.GetStrategies())` and `require.Equal(t, "Bearer
prefetched-token", d.Secret.Headers[0].Value)` intact while correcting the
variable reference and closing braces.
In `@pkg/authprovider/authx/dynamic.go`:
- Around line 42-45: The methods can dereference a nil d.once when Validate()
hasn't been called; update getOnce() to lazily initialize and store a new
*sync.Once when d.once.Load() returns nil (create new(sync.Once), store it
atomically) and return it, and replace direct dereferences of d.once in Fetch,
GetStrategies, and Reset with calls to getOnce() so those public methods never
panic on a zero-value Dynamic.
- Around line 305-308: The Reset() method currently unlocks d.mu before clearing
shared state d.Extracted, which can race with concurrent fetch/hydrate flows;
modify Reset() so that the assignment d.Extracted = nil is performed while
holding d.mu (i.e., move the d.Extracted = nil line between d.mu.Lock() and
d.mu.Unlock()) to ensure the mutex protects all shared-state modifications in
Reset() (referencing Reset(), d.mu, and d.Extracted).
- Around line 207-214: In fetchAndHydrate ensure you nil-check d.fetchCallback
before calling it: inside Dynamic.fetchAndHydrate (which currently locks d.mu
and calls d.fetchCallback(d)), if d.fetchCallback == nil set d.err to a
descriptive error (e.g. "nil fetchCallback") while holding the lock, call
d.resetOnce(), unlock and return; only call d.fetchCallback(d) when non-nil.
Make sure unlocking and reset behavior mirrors the existing error path.
---
Nitpick comments:
In `@pkg/authprovider/authx/dynamic_test.go`:
- Around line 1-3: TestEndToEndPrefetchFlow's comment says it verifies
concurrent GetStrategies() calls but the test only calls GetStrategies once;
either update the comment or add concurrent callers. Modify the
TestEndToEndPrefetchFlow test to spawn multiple goroutines that call
authx.GetStrategies() concurrently (use a sync.WaitGroup and channel to collect
errors/results) after calling authx.Fetch(), then assert all goroutines observe
the hydrated state; alternatively, if you prefer not to test concurrency, change
the test comment to remove "concurrent" and reflect the single-call behavior.
Ensure references to Fetch() and GetStrategies() remain in the test logic and
assertions.
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pkg/authprovider/authx/dynamic.gopkg/authprovider/authx/dynamic_test.go
Comment on lines
+42
to
+45
| func (d *Dynamic) getOnce() *sync.Once { | ||
| // Fast path - check if already initialized | ||
| ptr := d.once.Load() | ||
| if ptr != nil { |
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Public methods can panic when Validate() was not called first
Line 44 and Line 301 dereference d.once without checking initialization. Fetch(), GetStrategies(), or Reset() on a zero-value Dynamic can panic.
Suggested fix
+func (d *Dynamic) ensureOnceGuard() {
+ if d.once == nil {
+ d.once = &atomic.Pointer[*sync.Once]{}
+ once := &sync.Once{}
+ d.once.Store(&once)
+ }
+}
+
func (d *Dynamic) getOnce() *sync.Once {
+ d.ensureOnceGuard()
// Fast path - check if already initialized
ptr := d.once.Load()
if ptr != nil {
return *ptr
}
@@
func (d *Dynamic) Reset() {
+ d.ensureOnceGuard()
once := &sync.Once{}
d.once.Store(&once)Also applies to: 299-302
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed.
In `@pkg/authprovider/authx/dynamic.go` around lines 42 - 45, The methods can
dereference a nil d.once when Validate() hasn't been called; update getOnce() to
lazily initialize and store a new *sync.Once when d.once.Load() returns nil
(create new(sync.Once), store it atomically) and return it, and replace direct
dereferences of d.once in Fetch, GetStrategies, and Reset with calls to
getOnce() so those public methods never panic on a zero-value Dynamic.
- Fix Reset() data race: move d.Extracted = nil inside mutex lock - Add nil check for fetchCallback in fetchAndHydrate() - Add nil check for d.once in getOnce() when Validate() not called Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Actionable comments posted: 1
♻️ Duplicate comments (1)
pkg/authprovider/authx/dynamic.go (1)
45-47:⚠️ Potential issue | 🟠 MajorSynchronize
d.oncecontainer init and reuse it inReset().Line 45 initializes
d.oncewithout synchronization, so concurrent first access can create multipleatomic.Pointercontainers and break single-guard semantics; Line 314 can also panic ifReset()is called beforeValidate().🔧 Suggested fix
+func (d *Dynamic) ensureOnceContainer() *atomic.Pointer[*sync.Once] { + if d.once != nil { + return d.once + } + d.mu.Lock() + defer d.mu.Unlock() + if d.once == nil { + d.once = &atomic.Pointer[*sync.Once]{} + } + return d.once +} + func (d *Dynamic) getOnce() *sync.Once { - // Handle case where Validate() was not called - if d.once == nil { - d.once = &atomic.Pointer[*sync.Once]{} - } + onceContainer := d.ensureOnceContainer() // Fast path - check if already initialized - ptr := d.once.Load() + ptr := onceContainer.Load() if ptr != nil { return *ptr } // Slow path - create new sync.Once once := &sync.Once{} // Try to store - if another goroutine beat us, use theirs - if !d.once.CompareAndSwap(nil, &once) { + if !onceContainer.CompareAndSwap(nil, &once) { // Someone else stored, use their value - return *d.once.Load() + return *onceContainer.Load() } return once } func (d *Dynamic) resetOnce() { // Atomically swap with a new sync.Once + onceContainer := d.ensureOnceContainer() once := &sync.Once{} - d.once.Store(&once) + onceContainer.Store(&once) } func (d *Dynamic) Reset() { - once := &sync.Once{} - d.once.Store(&once) + d.resetOnce() if d.fetched != nil { d.fetched.Store(false) }Also applies to: 56-58, 313-315
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic.go` around lines 45 - 47, d.once is lazily created without synchronization which can race and cause multiple atomic.Pointer containers or panics in Reset()/Validate(); fix by ensuring a single atomic.Pointer[*sync.Once] container is created atomically and reused: add a small helper (e.g., ensureOnceContainer) that uses atomic.CompareAndSwap (or a package-level sync.Mutex) to install a new &atomic.Pointer[*sync.Once] only if nil, and call that helper at the start of Validate(), Reset(), and any other entry points; in Reset() first call the helper, then safe Store a new *sync.Once into the existing atomic.Pointer container (don’t replace the container itself without synchronization).
🧹 Nitpick comments (1)
pkg/authprovider/authx/dynamic_test.go (1)
183-184: Replace sleep-based coordination with explicit barriers.These
time.Sleepwaits keep concurrency tests timing-sensitive. Prefer explicit channel/WaitGroup barriers so CI timing variance doesn’t affect outcomes.Also applies to: 240-241, 315-316, 499-500
🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic_test.go` around lines 183 - 184, Replace the timing-sensitive time.Sleep calls with explicit synchronization: remove the time.Sleep(10 * time.Millisecond) calls and instead use channel or sync.WaitGroup barriers to signal readiness/completion (e.g., send/close on fetchDone or use a done/ready channel) so the goroutines under test wait deterministically; update the test code around the fetch goroutine and any waiter logic to block on the channel/WaitGroup and then close or signal fetchDone when the operation is truly finished (apply same change to the other occurrences referenced).
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Inline comments:
In `@pkg/authprovider/authx/dynamic.go`:
- Line 259: The code unconditionally calls d.fetched.Store(true) which can panic
because d.fetched is only initialized in Validate(); update fetchAndHydrate() to
ensure d.fetched is non-nil before calling Store by allocating a new atomic.Bool
(or whatever concrete type is used) when nil, mirroring the nil-check and
initialization pattern used in Reset() and IsFetched(); this prevents
GetStrategies()/getOnce() from triggering a nil pointer panic when invoked prior
to Validate(). Ensure you reference and modify fetchAndHydrate(), leaving usages
in GetStrategies(), Validate(), Reset(), and IsFetched() unchanged except for
the added safe initialization of d.fetched.
---
Duplicate comments:
In `@pkg/authprovider/authx/dynamic.go`:
- Around line 45-47: d.once is lazily created without synchronization which can
race and cause multiple atomic.Pointer containers or panics in
Reset()/Validate(); fix by ensuring a single atomic.Pointer[*sync.Once]
container is created atomically and reused: add a small helper (e.g.,
ensureOnceContainer) that uses atomic.CompareAndSwap (or a package-level
sync.Mutex) to install a new &atomic.Pointer[*sync.Once] only if nil, and call
that helper at the start of Validate(), Reset(), and any other entry points; in
Reset() first call the helper, then safe Store a new *sync.Once into the
existing atomic.Pointer container (don’t replace the container itself without
synchronization).
---
Nitpick comments:
In `@pkg/authprovider/authx/dynamic_test.go`:
- Around line 183-184: Replace the timing-sensitive time.Sleep calls with
explicit synchronization: remove the time.Sleep(10 * time.Millisecond) calls and
instead use channel or sync.WaitGroup barriers to signal readiness/completion
(e.g., send/close on fetchDone or use a done/ready channel) so the goroutines
under test wait deterministically; update the test code around the fetch
goroutine and any waiter logic to block on the channel/WaitGroup and then close
or signal fetchDone when the operation is truly finished (apply same change to
the other occurrences referenced).
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pkg/authprovider/authx/dynamic.gopkg/authprovider/authx/dynamic_test.go
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✅ Actions performedReviews resumed. |
Guard d.fetched.Store(true) with nil check to prevent panic when GetStrategies() is called before Validate(). Matches the nil-check pattern already used in Reset() and IsFetched(). Addresses CodeRabbit feedback on PR projectdiscovery#7110.
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♻️ Duplicate comments (2)
pkg/authprovider/authx/dynamic.go (2)
315-325:⚠️ Potential issue | 🟡 Minor
Reset()can panic ifValidate()was not called becaused.oncemay be nil.Line 317 calls
d.once.Store(&once)without checking ifd.onceis nil. WhilegetOnce()lazily initializesd.once,Reset()does not. CallingReset()on an unvalidatedDynamicinstance will cause a nil pointer panic.🛡️ Proposed fix to add nil check
func (d *Dynamic) Reset() { once := &sync.Once{} + if d.once == nil { + d.once = &atomic.Pointer[*sync.Once]{} + } d.once.Store(&once) if d.fetched != nil { d.fetched.Store(false) }🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic.go` around lines 315 - 325, Reset() can panic because it calls d.once.Store(...) when d.once may be nil; change Reset to guard against nil d.once (or initialize it) before calling Store. Specifically, update Reset() to either use the same lazy init used by getOnce() (initialize d.once if nil) or check if d.once is nil and skip the Store; reference the Dynamic.Reset method and the existing getOnce()/Validate() initialization path so the fix mirrors how d.once is created elsewhere and prevents a nil pointer dereference.
43-61:⚠️ Potential issue | 🟡 MinorPotential race on
d.onceinitialization whenValidate()was not called.At lines 45-47, if
d.once == niland multiple goroutines callgetOnce()concurrently, they could each create and assign a newatomic.Pointer[*sync.Once]{}. While the subsequentCompareAndSwapat line 56 ensures only onesync.Onceis stored, different goroutines might end up with differentatomic.Pointerinstances, causing them to operate on separate guards.This is a defensive path for when
Validate()wasn't called. Consider usingsync.OnceValueor a package-level initialization to avoid this edge case, or document thatValidate()must be called before concurrent access.🛡️ Proposed fix using sync.Once for atomic.Pointer initialization
func (d *Dynamic) getOnce() *sync.Once { // Handle case where Validate() was not called if d.once == nil { - d.once = &atomic.Pointer[*sync.Once]{} + // Note: This is not thread-safe if Validate() was not called + // and multiple goroutines call getOnce() concurrently. + // Callers should ensure Validate() is called before concurrent use. + d.once = &atomic.Pointer[*sync.Once]{} }Alternatively, add a
sync.Onceguard for initializingd.once:var initOnce sync.Once func (d *Dynamic) getOnce() *sync.Once { initOnce.Do(func() { if d.once == nil { d.once = &atomic.Pointer[*sync.Once]{} } }) // ... rest of method }However, this would share state across all
Dynamicinstances. The simplest fix is to document thatValidate()must be called before concurrent access.🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic.go` around lines 43 - 61, getOnce has a race when d.once is nil because multiple goroutines can allocate different atomic.Pointer instances; fix by making the initialization of d.once per-instance atomic: add a new field on Dynamic (e.g., initMu sync.Mutex) and in getOnce wrap the nil-check/assignment of d.once with initMu.Lock()/Unlock(), then proceed with the existing fast/slow path logic using d.once, leaving the CompareAndSwap and sync.Once creation unchanged; this ensures only one atomic.Pointer[*sync.Once] is installed per Dynamic instance without requiring external Validate() calls.
🧹 Nitpick comments (2)
pkg/authprovider/authx/dynamic_test.go (1)
182-184: Minor:time.Sleepfor goroutine synchronization may cause flaky tests on slow CI.While the channel-based synchronization is good, the
time.Sleep(10 * time.Millisecond)at lines 183, 240, 315, and 499 introduces timing dependencies. On heavily loaded CI systems, goroutines may not have started and blocked onGetStrategies()before the sleep completes, potentially causing intermittent test failures.Consider using a barrier or additional synchronization to confirm all goroutines have entered
GetStrategies()before proceeding. However, this is a minor concern since the tests appear to work reliably based on PR comments.🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic_test.go` around lines 182 - 184, Replace the fragile time.Sleep synchronization with an explicit barrier: have each test goroutine signal when it has reached the GetStrategies() blocking point (e.g., by calling startedWG.Done() or sending on a started channel) and have the main test wait for all goroutines to be ready (startedWG.Wait() or receiving N signals) before closing fetchDone; update the test cases that reference GetStrategies, fetchDone, and the goroutine spawn logic to use this WaitGroup/channel-based readiness check instead of time.Sleep(10 * time.Millisecond).pkg/authprovider/authx/dynamic.go (1)
212-263: Holding mutex during potentially slowfetchCallbackmay cause contention.The mutex
d.muis held from line 213 through the entirefetchCallback(d)execution (line 222) and hydration. If the fetch callback involves network I/O (as suggested by the "slow network request" simulation in tests), this could block concurrentError()andGetStrategies()readers for extended periods.Consider restructuring to only hold the mutex when reading/writing
d.err, not during the callback itself:♻️ Proposed restructuring
func (d *Dynamic) fetchAndHydrate() { + // Check if fetchCallback is nil before calling + if d.fetchCallback == nil { + d.mu.Lock() + d.err = fmt.Errorf("fetchCallback is not set for dynamic secret") + d.mu.Unlock() + d.resetOnce() + return + } + + // Execute callback without holding the lock (may be slow I/O) + fetchErr := d.fetchCallback(d) + d.mu.Lock() - // Check if fetchCallback is nil before calling - if d.fetchCallback == nil { - d.err = fmt.Errorf("fetchCallback is not set for dynamic secret") - d.mu.Unlock() - // Reset once to allow retry on next call - d.resetOnce() - return - } - d.err = d.fetchCallback(d) + d.err = fetchErr if d.err != nil {However, this would require careful analysis to ensure
d.Extractedwrites in the callback don't race with reads elsewhere. The current approach is correct, just potentially slower under contention.🤖 Prompt for AI Agents
Verify each finding against the current code and only fix it if needed. In `@pkg/authprovider/authx/dynamic.go` around lines 212 - 263, fetchAndHydrate currently holds d.mu across the slow fetchCallback(d) and hydration, causing contention; change it to only hold the mutex for short critical sections: take the lock to check fetchCallback != nil and set any pre-call state, then unlock before calling d.fetchCallback(d) so network I/O doesn't block readers; after the callback returns, re-lock and perform the same validation and error assignment (check d.err, len(d.Extracted), call d.resetOnce() on failure), run applyValuesToSecret under the lock for d.Secret and each entry in d.Secrets, and finally set d.fetched.Store(true) after unlocking as currently done—ensure you reference and update the same fields used now (d.fetchCallback, d.err, d.Extracted, d.Secret, d.Secrets, d.resetOnce, d.fetched) so no race is introduced when the callback mutates those fields.
🤖 Prompt for all review comments with AI agents
Verify each finding against the current code and only fix it if needed.
Duplicate comments:
In `@pkg/authprovider/authx/dynamic.go`:
- Around line 315-325: Reset() can panic because it calls d.once.Store(...) when
d.once may be nil; change Reset to guard against nil d.once (or initialize it)
before calling Store. Specifically, update Reset() to either use the same lazy
init used by getOnce() (initialize d.once if nil) or check if d.once is nil and
skip the Store; reference the Dynamic.Reset method and the existing
getOnce()/Validate() initialization path so the fix mirrors how d.once is
created elsewhere and prevents a nil pointer dereference.
- Around line 43-61: getOnce has a race when d.once is nil because multiple
goroutines can allocate different atomic.Pointer instances; fix by making the
initialization of d.once per-instance atomic: add a new field on Dynamic (e.g.,
initMu sync.Mutex) and in getOnce wrap the nil-check/assignment of d.once with
initMu.Lock()/Unlock(), then proceed with the existing fast/slow path logic
using d.once, leaving the CompareAndSwap and sync.Once creation unchanged; this
ensures only one atomic.Pointer[*sync.Once] is installed per Dynamic instance
without requiring external Validate() calls.
---
Nitpick comments:
In `@pkg/authprovider/authx/dynamic_test.go`:
- Around line 182-184: Replace the fragile time.Sleep synchronization with an
explicit barrier: have each test goroutine signal when it has reached the
GetStrategies() blocking point (e.g., by calling startedWG.Done() or sending on
a started channel) and have the main test wait for all goroutines to be ready
(startedWG.Wait() or receiving N signals) before closing fetchDone; update the
test cases that reference GetStrategies, fetchDone, and the goroutine spawn
logic to use this WaitGroup/channel-based readiness check instead of
time.Sleep(10 * time.Millisecond).
In `@pkg/authprovider/authx/dynamic.go`:
- Around line 212-263: fetchAndHydrate currently holds d.mu across the slow
fetchCallback(d) and hydration, causing contention; change it to only hold the
mutex for short critical sections: take the lock to check fetchCallback != nil
and set any pre-call state, then unlock before calling d.fetchCallback(d) so
network I/O doesn't block readers; after the callback returns, re-lock and
perform the same validation and error assignment (check d.err, len(d.Extracted),
call d.resetOnce() on failure), run applyValuesToSecret under the lock for
d.Secret and each entry in d.Secrets, and finally set d.fetched.Store(true)
after unlocking as currently done—ensure you reference and update the same
fields used now (d.fetchCallback, d.err, d.Extracted, d.Secret, d.Secrets,
d.resetOnce, d.fetched) so no race is introduced when the callback mutates those
fields.
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Run ID: e11c978b-cd95-45ca-87da-060d29eebc3d
📒 Files selected for processing (2)
pkg/authprovider/authx/dynamic.gopkg/authprovider/authx/dynamic_test.go
- Remove redundant `d.Secret.` prefix from embedded Secret field access - Changed `d.Secret.Headers` to `d.Headers` (8 occurrences) - Removed unnecessary `d.Secret != nil` check for embedded field - All tests passing, staticcheck clean
Mzack9999
requested changes
Mar 5, 2026
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Mzack9999
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Mzack9999
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Looks like there is a potential deadlock:
check-template.yaml
login-template.yaml
secret.yaml
with this server:
package main
import (
"fmt"
"net/http"
"os"
"time"
)
func main() {
http.HandleFunc("/accounts/login/", func(w http.ResponseWriter, r *http.Request) {
fmt.Fprintf(os.Stderr, ">>> %s %s\n", r.Method, r.URL.Path)
time.Sleep(500 * time.Millisecond)
w.Header().Set("Set-Cookie", "session=abc123; Path=/")
w.WriteHeader(302)
})
http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
cookie := r.Header.Get("Cookie")
fmt.Fprintf(os.Stderr, ">>> %s %s cookie=%q\n", r.Method, r.URL.Path, cookie)
if cookie == "" {
fmt.Fprintf(os.Stderr, " *** UNAUTHENTICATED (bug #6592) ***\n")
} else {
fmt.Fprintf(os.Stderr, " +++ AUTHENTICATED (fix working) +++\n")
}
w.WriteHeader(200)
fmt.Fprint(w, "hello")
})
fmt.Println("Server listening on :18999")
if err := http.ListenAndServe(":18999", nil); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
Nuclei hangs
go run . -t check-template.yaml -secret-file secret.yaml -u http://127.0.0.1:18999 -ni -duc -ps -debug
__ _
____ __ _______/ /__ (_)
/ __ \/ / / / ___/ / _ \/ /
/ / / / /_/ / /__/ / __/ /
/_/ /_/\__,_/\___/_/\___/_/ v3.7.0
projectdiscovery.io
[INF] Current nuclei version: v3.7.0 (unknown) - remove '-duc' flag to enable update checks
[INF] Current nuclei-templates version: v10.3.9 (unknown) - remove '-duc' flag to enable update checks
[WRN] Scan results upload to cloud is disabled.
[INF] New templates added in latest release: 182
[INF] Templates loaded for current scan: 1
[WRN] Loading 1 unsigned templates for scan. Use with caution.
[INF] Targets loaded for current scan: 1
[INF] Pre-fetching secrets from authprovider[s]
Member
|
Thank you for your contribution @hanzhcn! Adding retry logic alongside the race fix shows forward-thinking about resilience. However, combining a retry mechanism with the race condition fix increases the PR's scope and risk. We merged #6976 which focuses tightly on the race condition using Closing this as the issue has been resolved. Thank you for contributing to nuclei! |
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Summary
This PR fixes Issue #6592 with three critical improvements:
1. Race Condition Fix (Original)
Replaced
atomic.Boolwithsync.Onceto guarantee strict synchronization. All concurrent callers now properly block until the initial fetch completes and populates the shared state.2. Retry on Failure (New - Addresses CodeRabbit Feedback)
Fixed a critical design flaw where transient fetch failures would permanently lock the Dynamic secret in a failed state. Now:
atomic.Valueto store*sync.Once, allowing dynamic replacementReset()method for manual state resetIsFetched()method to check fetch status3. Atomic Fetch-and-Hydrate (Critical Fix)
Created unified
fetchAndHydrate()method that combines BOTH fetch callback execution AND template variable hydration under a single sync.Once guard. This prevents the bug where:Fetch()consumes the once guard without hydrationGetStrategies()returns unhydrated secrets with unresolved{{template}}variables4. Clean API - Removed gologger.Fatal() (Latest)
Simplified the
Fetch()API by removing theisFatalparameter andgologger.Fatal()call:Dynamichandles secret fetching, not program lifecycleChanges
pkg/authprovider/authx/dynamic.go
*sync.Oncewithatomic.Valuestoring*sync.OncegetOnce()helper for lazy initializationresetOnce()helper for error recoveryfetchAndHydrate()method combining fetch + hydrationGetStrategies()andFetch()to use unified methodReset()method for manual state resetIsFetched()method for status checkingisFatalparameter andgologger.Fatal()call fromFetch()pkg/authprovider/authx/dynamic_test.go
TestDynamicFetchAndHydrateIntegrationwith 4 test cases:hydration-occurs-before-strategies-returnedfetch-then-getstrategies-returns-hydrated-secretgetstrategies-then-fetch-both-return-hydratedconcurrent-fetch-and-getstrategies-all-hydratedTestDynamicFetchRetryOnErrorwith 3 test cases:retry-after-fetch-errormanual-reset-allows-refetchno-retry-after-successpkg/authprovider/file.go
PreFetchSecrets()to use newFetch()signatureProof
All Tests Pass
Race Detection Clean
Comparison with Competing PR #6946
This PR provides a more complete and production-ready solution by addressing not just the race condition, but also the retry mechanism, hydration ordering, and clean API design.
Closes #6592
/claim #6592
Summary by CodeRabbit
New Features
Bug Fixes
Tests