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runtime: disable io-uring on EPERM #7724

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Merged
ADD-SP merged 1 commit into from
Nov 8, 2025
+7 −0
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runtime: disable io-uring on EPERM #7724

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7 changes: 7 additions & 0 deletions tokio/src/runtime/io/driver/uring.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -194,6 +194,13 @@ impl Handle {
self.set_uring_state(State::Unsupported);
Ok(false)
}
// If we get EPERM, io-uring syscalls may be blocked (for example, by seccomp).
// In this case, we try to fall back to spawn_blocking for this and future operations.
// See also: https://github.com/tokio-rs/tokio/issues/7691
Err(e) if e.raw_os_error() == Some(libc::EPERM) => {
self.set_uring_state(State::Unsupported);
Ok(false)
}
// For other system errors, we just return it.
Err(e) => Err(e),
},
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