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Compilation problem with a 4.14.y kernel #249

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eackkk opened this issue Dec 13, 2021 · 3 comments
Closed

Compilation problem with a 4.14.y kernel #249

eackkk opened this issue Dec 13, 2021 · 3 comments
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@eackkk
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eackkk commented Dec 13, 2021

Hi, does mptcp support arm64 architecture? I downloaded the mptcp code incorporated into linux 4.14.* and tried to compile it into aarch64 architecture, but I found that there is no in the .config file:
CONFIG_MPTCP=y
CONFIG_INET_MPTCP_DIAG=y
CONFIG_MPTCP_IPV6=y
only:
CONFIG_DEFAULT_MPTCP_PM="default"
There are a small number of mptcp related strings in the compiled vmlinux, but I am not sure whether the .config display is normal
@eackkk
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eackkk commented Dec 13, 2021

When I compile menuconfig with arm64, no MPTCP related options are found

@matttbe
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matttbe commented Dec 13, 2021

Hi,

As detailed in our Wiki, MPTCP is only supported in the mainline Linux since v5.6 (with very limited features).

If you want to have MPTCP support on your 4.14 kernel and you cannot easily upgrade to the v5.15 one, you can modify your kernel using patches from this out-of-tree project: https://github.com/multipath-tcp/mptcp

@matttbe
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matttbe commented Dec 13, 2021

Because I don't think we can do anything to help here with kernels older than v5.6, I hope you don't mind if I close this ticket.

@matttbe matttbe closed this as completed Dec 13, 2021
@matttbe matttbe changed the title Compilation problem Compilation problem with a 4.14.y kernel Dec 13, 2021
jenkins-tessares pushed a commit that referenced this issue Feb 18, 2023
@chleroy @akpm00
kasan: fix Oops due to missing calls to kasan_arch_is_ready()
55d77ba 
On powerpc64, you can build a kernel with KASAN as soon as you build it
with RADIX MMU support.  However if the CPU doesn't have RADIX MMU, KASAN
isn't enabled at init and the following Oops is encountered.

  [    0.000000][    T0] KASAN not enabled as it requires radix!

  [    4.484295][   T26] BUG: Unable to handle kernel data access at 0xc00e000000804a04
  [    4.485270][   T26] Faulting instruction address: 0xc00000000062ec6c
  [    4.485748][   T26] Oops: Kernel access of bad area, sig: 11 [#1]
  [    4.485920][   T26] BE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries
  [    4.486259][   T26] Modules linked in:
  [    4.486637][   T26] CPU: 0 PID: 26 Comm: kworker/u2:2 Not tainted 6.2.0-rc3-02590-gf8a023b0a805 #249
  [    4.486907][   T26] Hardware name: IBM pSeries (emulated by qemu) POWER9 (raw) 0x4e1200 0xf000005 of:SLOF,HEAD pSeries
  [    4.487445][   T26] Workqueue: eval_map_wq .tracer_init_tracefs_work_func
  [    4.488744][   T26] NIP:  c00000000062ec6c LR: c00000000062bb84 CTR: c0000000002ebcd0
  [    4.488867][   T26] REGS: c0000000049175c0 TRAP: 0380   Not tainted  (6.2.0-rc3-02590-gf8a023b0a805)
  [    4.489028][   T26] MSR:  8000000002009032 <SF,VEC,EE,ME,IR,DR,RI>  CR: 44002808  XER: 00000000
  [    4.489584][   T26] CFAR: c00000000062bb80 IRQMASK: 0
  [    4.489584][   T26] GPR00: c0000000005624d4 c000000004917860 c000000001cfc000 1800000000804a04
  [    4.489584][   T26] GPR04: c0000000003a2650 0000000000000cc0 c00000000000d3d8 c00000000000d3d8
  [    4.489584][   T26] GPR08: c0000000049175b0 a80e000000000000 0000000000000000 0000000017d78400
  [    4.489584][   T26] GPR12: 0000000044002204 c000000003790000 c00000000435003c c0000000043f1c40
  [    4.489584][   T26] GPR16: c0000000043f1c68 c0000000043501a0 c000000002106138 c0000000043f1c08
  [    4.489584][   T26] GPR20: c0000000043f1c10 c0000000043f1c20 c000000004146c40 c000000002fdb7f8
  [    4.489584][   T26] GPR24: c000000002fdb834 c000000003685e00 c000000004025030 c000000003522e90
  [    4.489584][   T26] GPR28: 0000000000000cc0 c0000000003a2650 c000000004025020 c000000004025020
  [    4.491201][   T26] NIP [c00000000062ec6c] .kasan_byte_accessible+0xc/0x20
  [    4.491430][   T26] LR [c00000000062bb84] .__kasan_check_byte+0x24/0x90
  [    4.491767][   T26] Call Trace:
  [    4.491941][   T26] [c000000004917860] [c00000000062ae70] .__kasan_kmalloc+0xc0/0x110 (unreliable)
  [    4.492270][   T26] [c0000000049178f0] [c0000000005624d4] .krealloc+0x54/0x1c0
  [    4.492453][   T26] [c000000004917990] [c0000000003a2650] .create_trace_option_files+0x280/0x530
  [    4.492613][   T26] [c000000004917a90] [c000000002050d90] .tracer_init_tracefs_work_func+0x274/0x2c0
  [    4.492771][   T26] [c000000004917b40] [c0000000001f9948] .process_one_work+0x578/0x9f0
  [    4.492927][   T26] [c000000004917c30] [c0000000001f9ebc] .worker_thread+0xfc/0x950
  [    4.493084][   T26] [c000000004917d60] [c00000000020be84] .kthread+0x1a4/0x1b0
  [    4.493232][   T26] [c000000004917e10] [c00000000000d3d8] .ret_from_kernel_thread+0x58/0x60
  [    4.495642][   T26] Code: 60000000 7cc802a6 38a00000 4bfffc78 60000000 7cc802a6 38a00001 4bfffc68 60000000 3d20a80e 7863e8c2 792907c6 <7c6348ae> 20630007 78630fe0 68630001
  [    4.496704][   T26] ---[ end trace 0000000000000000 ]---

The Oops is due to kasan_byte_accessible() not checking the readiness of
KASAN.  Add missing call to kasan_arch_is_ready() and bail out when not
ready.  The same problem is observed with ____kasan_kfree_large() so fix
it the same.

Also, as KASAN is not available and no shadow area is allocated for linear
memory mapping, there is no point in allocating shadow mem for vmalloc
memory as shown below in /sys/kernel/debug/kernel_page_tables

  ---[ kasan shadow mem start ]---
  0xc00f000000000000-0xc00f00000006ffff  0x00000000040f0000       448K         r  w       pte  valid  present        dirty  accessed
  0xc00f000000860000-0xc00f00000086ffff  0x000000000ac10000        64K         r  w       pte  valid  present        dirty  accessed
  0xc00f3ffffffe0000-0xc00f3fffffffffff  0x0000000004d10000       128K         r  w       pte  valid  present        dirty  accessed
  ---[ kasan shadow mem end ]---

So, also verify KASAN readiness before allocating and poisoning
shadow mem for VMAs.

Link: https://lkml.kernel.org/r/150768c55722311699fdcf8f5379e8256749f47d.1674716617.git.christophe.leroy@csgroup.eu
Fixes: 41b7a34 ("powerpc: Book3S 64-bit outline-only KASAN support")
Signed-off-by: Christophe Leroy <[email protected]>
Reported-by: Nathan Lynch <[email protected]>
Suggested-by: Michael Ellerman <[email protected]>
Cc: Alexander Potapenko <[email protected]>
Cc: Andrey Konovalov <[email protected]>
Cc: Andrey Ryabinin <[email protected]>
Cc: Dmitry Vyukov <[email protected]>
Cc: Vincenzo Frascino <[email protected]>
Cc: <[email protected]>	[5.19+]
Signed-off-by: Andrew Morton <[email protected]>
matttbe pushed a commit that referenced this issue Jun 16, 2023
@mchehab
Revert "media: dvb-core: Fix use-after-free on race condition at dvb_…
ec21a38 
…frontend"

As reported by Thomas Voegtle <[email protected]>, sometimes a DVB card does
not initialize properly booting Linux 6.4-rc4. This is not always, maybe
in 3 out of 4 attempts.

After double-checking, the root cause seems to be related to the
UAF fix, which is causing a race issue:

[   26.332149] tda10071 7-0005: found a 'NXP TDA10071' in cold state, will try to load a firmware
[   26.340779] tda10071 7-0005: downloading firmware from file 'dvb-fe-tda10071.fw'
[  989.277402] INFO: task vdr:743 blocked for more than 491 seconds.
[  989.283504]       Not tainted 6.4.0-rc5-i5 #249
[  989.288036] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[  989.295860] task:vdr             state:D stack:0     pid:743   ppid:711    flags:0x00004002
[  989.295865] Call Trace:
[  989.295867]  <TASK>
[  989.295869]  __schedule+0x2ea/0x12d0
[  989.295877]  ? asm_sysvec_apic_timer_interrupt+0x16/0x20
[  989.295881]  schedule+0x57/0xc0
[  989.295884]  schedule_preempt_disabled+0xc/0x20
[  989.295887]  __mutex_lock.isra.16+0x237/0x480
[  989.295891]  ? dvb_get_property.isra.10+0x1bc/0xa50
[  989.295898]  ? dvb_frontend_stop+0x36/0x180
[  989.338777]  dvb_frontend_stop+0x36/0x180
[  989.338781]  dvb_frontend_open+0x2f1/0x470
[  989.338784]  dvb_device_open+0x81/0xf0
[  989.338804]  ? exact_lock+0x20/0x20
[  989.338808]  chrdev_open+0x7f/0x1c0
[  989.338811]  ? generic_permission+0x1a2/0x230
[  989.338813]  ? link_path_walk.part.63+0x340/0x380
[  989.338815]  ? exact_lock+0x20/0x20
[  989.338817]  do_dentry_open+0x18e/0x450
[  989.374030]  path_openat+0xca5/0xe00
[  989.374031]  ? terminate_walk+0xec/0x100
[  989.374034]  ? path_lookupat+0x93/0x140
[  989.374036]  do_filp_open+0xc0/0x140
[  989.374038]  ? __call_rcu_common.constprop.91+0x92/0x240
[  989.374041]  ? __check_object_size+0x147/0x260
[  989.374043]  ? __check_object_size+0x147/0x260
[  989.374045]  ? alloc_fd+0xbb/0x180
[  989.374048]  ? do_sys_openat2+0x243/0x310
[  989.374050]  do_sys_openat2+0x243/0x310
[  989.374052]  do_sys_open+0x52/0x80
[  989.374055]  do_syscall_64+0x5b/0x80
[  989.421335]  ? __task_pid_nr_ns+0x92/0xa0
[  989.421337]  ? syscall_exit_to_user_mode+0x20/0x40
[  989.421339]  ? do_syscall_64+0x67/0x80
[  989.421341]  ? syscall_exit_to_user_mode+0x20/0x40
[  989.421343]  ? do_syscall_64+0x67/0x80
[  989.421345]  entry_SYSCALL_64_after_hwframe+0x63/0xcd
[  989.421348] RIP: 0033:0x7fe895d067e3
[  989.421349] RSP: 002b:00007fff933c2ba0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
[  989.421351] RAX: ffffffffffffffda RBX: 00007fff933c2c10 RCX: 00007fe895d067e3
[  989.421352] RDX: 0000000000000802 RSI: 00005594acdce160 RDI: 00000000ffffff9c
[  989.421353] RBP: 0000000000000802 R08: 0000000000000000 R09: 0000000000000000
[  989.421353] R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
[  989.421354] R13: 00007fff933c2ca0 R14: 00000000ffffffff R15: 00007fff933c2c90
[  989.421355]  </TASK>

This reverts commit 6769a0b.

Fixes: 6769a0b ("media: dvb-core: Fix use-after-free on race condition at dvb_frontend")
Link: https://lore.kernel.org/all/[email protected]/
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
jenkins-tessares pushed a commit that referenced this issue Jul 20, 2023
@borkmann
selftests/bpf: Add mprog API tests for BPF tcx opts
cd13c91 
Add a big batch of test coverage to assert all aspects of the tcx opts
attach, detach and query API:

  # ./vmtest.sh -- ./test_progs -t tc_opts
  [...]
  #238     tc_opts_after:OK
  #239     tc_opts_append:OK
  #240     tc_opts_basic:OK
  #241     tc_opts_before:OK
  #242     tc_opts_chain_classic:OK
  #243     tc_opts_demixed:OK
  #244     tc_opts_detach:OK
  #245     tc_opts_detach_after:OK
  #246     tc_opts_detach_before:OK
  #247     tc_opts_dev_cleanup:OK
  #248     tc_opts_invalid:OK
  #249     tc_opts_mixed:OK
  #250     tc_opts_prepend:OK
  #251     tc_opts_replace:OK
  #252     tc_opts_revision:OK
  Summary: 15/0 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexei Starovoitov <[email protected]>
jenkins-tessares pushed a commit that referenced this issue Aug 11, 2023
@borkmann
selftests/bpf: Add test for detachment on empty mprog entry
21ce6ab 
Add a detachment test case with miniq present to assert that with and
without the miniq we get the same error.

  # ./test_progs -t tc_opts
  #244     tc_opts_after:OK
  #245     tc_opts_append:OK
  #246     tc_opts_basic:OK
  #247     tc_opts_before:OK
  #248     tc_opts_chain_classic:OK
  #249     tc_opts_delete_empty:OK
  #250     tc_opts_demixed:OK
  #251     tc_opts_detach:OK
  #252     tc_opts_detach_after:OK
  #253     tc_opts_detach_before:OK
  #254     tc_opts_dev_cleanup:OK
  #255     tc_opts_invalid:OK
  #256     tc_opts_mixed:OK
  #257     tc_opts_prepend:OK
  #258     tc_opts_replace:OK
  #259     tc_opts_revision:OK
  Summary: 16/0 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Martin KaFai Lau <[email protected]>
matttbe pushed a commit that referenced this issue Aug 17, 2023
@borkmann
selftests/bpf: Add various more tcx test cases
ccd9a8b 
Add several new tcx test cases to improve test coverage. This also includes
a few new tests with ingress instead of clsact qdisc, to cover the fix from
commit dc644b5 ("tcx: Fix splat in ingress_destroy upon tcx_entry_free").

  # ./test_progs -t tc
  [...]
  #234     tc_links_after:OK
  #235     tc_links_append:OK
  #236     tc_links_basic:OK
  #237     tc_links_before:OK
  #238     tc_links_chain_classic:OK
  #239     tc_links_chain_mixed:OK
  #240     tc_links_dev_cleanup:OK
  #241     tc_links_dev_mixed:OK
  #242     tc_links_ingress:OK
  #243     tc_links_invalid:OK
  #244     tc_links_prepend:OK
  #245     tc_links_replace:OK
  #246     tc_links_revision:OK
  #247     tc_opts_after:OK
  #248     tc_opts_append:OK
  #249     tc_opts_basic:OK
  #250     tc_opts_before:OK
  #251     tc_opts_chain_classic:OK
  #252     tc_opts_chain_mixed:OK
  #253     tc_opts_delete_empty:OK
  #254     tc_opts_demixed:OK
  #255     tc_opts_detach:OK
  #256     tc_opts_detach_after:OK
  #257     tc_opts_detach_before:OK
  #258     tc_opts_dev_cleanup:OK
  #259     tc_opts_invalid:OK
  #260     tc_opts_mixed:OK
  #261     tc_opts_prepend:OK
  #262     tc_opts_replace:OK
  #263     tc_opts_revision:OK
  [...]
  Summary: 44/38 PASSED, 0 SKIPPED, 0 FAILED

Signed-off-by: Daniel Borkmann <[email protected]>
Link: https://lore.kernel.org/r/8699efc284b75ccdc51ddf7062fa2370330dc6c0.1692029283.git.daniel@iogearbox.net
Signed-off-by: Martin KaFai Lau <[email protected]>
matttbe pushed a commit that referenced this issue May 3, 2024
@saproj @storulf
mmc: moxart: fix handling of sgm->consumed, otherwise WARN_ON triggers
e027e72 
When e.g. 8 bytes are to be read, sgm->consumed equals 8 immediately after
sg_miter_next() call. The driver then increments it as bytes are read,
so sgm->consumed becomes 16 and this warning triggers in sg_miter_stop():
WARN_ON(miter->consumed > miter->length);

WARNING: CPU: 0 PID: 28 at lib/scatterlist.c:925 sg_miter_stop+0x2c/0x10c
CPU: 0 PID: 28 Comm: kworker/0:2 Tainted: G        W          6.9.0-rc5-dirty #249
Hardware name: Generic DT based system
Workqueue: events_freezable mmc_rescan
Call trace:.
 unwind_backtrace from show_stack+0x10/0x14
 show_stack from dump_stack_lvl+0x44/0x5c
 dump_stack_lvl from __warn+0x78/0x16c
 __warn from warn_slowpath_fmt+0xb0/0x160
 warn_slowpath_fmt from sg_miter_stop+0x2c/0x10c
 sg_miter_stop from moxart_request+0xb0/0x468
 moxart_request from mmc_start_request+0x94/0xa8
 mmc_start_request from mmc_wait_for_req+0x60/0xa8
 mmc_wait_for_req from mmc_app_send_scr+0xf8/0x150
 mmc_app_send_scr from mmc_sd_setup_card+0x1c/0x420
 mmc_sd_setup_card from mmc_sd_init_card+0x12c/0x4dc
 mmc_sd_init_card from mmc_attach_sd+0xf0/0x16c
 mmc_attach_sd from mmc_rescan+0x1e0/0x298
 mmc_rescan from process_scheduled_works+0x2e4/0x4ec
 process_scheduled_works from worker_thread+0x1ec/0x24c
 worker_thread from kthread+0xd4/0xe0
 kthread from ret_from_fork+0x14/0x38

This patch adds initial zeroing of sgm->consumed. It is then incremented
as bytes are read or written.

Signed-off-by: Sergei Antonov <[email protected]>
Cc: Linus Walleij <[email protected]>
Fixes: 3ee0e7c ("mmc: moxart-mmc: Use sg_miter for PIO")
Reviewed-by: Linus Walleij <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Ulf Hansson <[email protected]>
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@matttbe @eackkk