Revision 77788775c7132a8d93c6930ab1bd84fc743c7cb7 authored by Jens Axboe on 29 December 2020, 17:50:46 UTC, committed by Jens Axboe on 29 December 2020, 18:00:36 UTC
If we COW the identity, we assume that ->mm never changes. But this isn't true of multiple processes end up sharing the ring. Hence treat id->mm like like any other process compontent when it comes to the identity mapping. This is pretty trivial, just moving the existing grab into io_grab_identity(), and including a check for the match. Cc: stable@vger.kernel.org # 5.10 Fixes: 1e6fa5216a0e ("io_uring: COW io_identity on mismatch") Reported-by: Christian Brauner <christian.brauner@ubuntu.com>: Tested-by: Christian Brauner <christian.brauner@ubuntu.com>: Signed-off-by: Jens Axboe <axboe@kernel.dk>
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File | Mode | Size |
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fallbacks | ||
atomic-tbl.sh | -rwxr-xr-x | 3.3 KB |
atomics.tbl | -rwxr-xr-x | 1.1 KB |
check-atomics.sh | -rwxr-xr-x | 757 bytes |
gen-atomic-fallback.sh | -rwxr-xr-x | 6.1 KB |
gen-atomic-instrumented.sh | -rwxr-xr-x | 5.0 KB |
gen-atomic-long.sh | -rwxr-xr-x | 2.2 KB |
gen-atomics.sh | -rwxr-xr-x | 680 bytes |
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