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>
1 parent 5c8fe58
| File | Mode | Size |
|---|---|---|
| 6fire | ||
| bcd2000 | ||
| caiaq | ||
| hiface | ||
| line6 | ||
| misc | ||
| usx2y | ||
| Kconfig | -rw-r--r-- | 4.7 KB |
| Makefile | -rw-r--r-- | 817 bytes |
| card.c | -rw-r--r-- | 30.0 KB |
| card.h | -rw-r--r-- | 7.6 KB |
| clock.c | -rw-r--r-- | 18.2 KB |
| clock.h | -rw-r--r-- | 474 bytes |
| endpoint.c | -rw-r--r-- | 41.0 KB |
| endpoint.h | -rw-r--r-- | 2.0 KB |
| format.c | -rw-r--r-- | 21.0 KB |
| format.h | -rw-r--r-- | 489 bytes |
| helper.c | -rw-r--r-- | 2.8 KB |
| helper.h | -rw-r--r-- | 1.3 KB |
| implicit.c | -rw-r--r-- | 12.3 KB |
| implicit.h | -rw-r--r-- | 478 bytes |
| media.c | -rw-r--r-- | 8.1 KB |
| media.h | -rw-r--r-- | 2.4 KB |
| midi.c | -rw-r--r-- | 69.5 KB |
| midi.h | -rw-r--r-- | 1.9 KB |
| mixer.c | -rw-r--r-- | 95.8 KB |
| mixer.h | -rw-r--r-- | 3.8 KB |
| mixer_maps.c | -rw-r--r-- | 18.7 KB |
| mixer_quirks.c | -rw-r--r-- | 81.1 KB |
| mixer_quirks.h | -rw-r--r-- | 655 bytes |
| mixer_s1810c.c | -rw-r--r-- | 15.3 KB |
| mixer_s1810c.h | -rw-r--r-- | 210 bytes |
| mixer_scarlett.c | -rw-r--r-- | 28.1 KB |
| mixer_scarlett.h | -rw-r--r-- | 208 bytes |
| mixer_scarlett_gen2.c | -rw-r--r-- | 54.9 KB |
| mixer_scarlett_gen2.h | -rw-r--r-- | 228 bytes |
| mixer_us16x08.c | -rw-r--r-- | 37.3 KB |
| mixer_us16x08.h | -rw-r--r-- | 4.0 KB |
| pcm.c | -rw-r--r-- | 41.7 KB |
| pcm.h | -rw-r--r-- | 637 bytes |
| power.c | -rw-r--r-- | 2.5 KB |
| power.h | -rw-r--r-- | 924 bytes |
| proc.c | -rw-r--r-- | 7.3 KB |
| proc.h | -rw-r--r-- | 250 bytes |
| quirks-table.h | -rw-r--r-- | 88.1 KB |
| quirks.c | -rw-r--r-- | 54.7 KB |
| quirks.h | -rw-r--r-- | 1.7 KB |
| stream.c | -rw-r--r-- | 32.3 KB |
| stream.h | -rw-r--r-- | 325 bytes |
| usbaudio.h | -rw-r--r-- | 3.3 KB |
| validate.c | -rw-r--r-- | 10.0 KB |
Computing file changes ...
