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| author | Jens Axboe <axboe@kernel.dk> | 2020-12-29 20:50:46 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-12-29 21:00:36 +0300 |
| commit | 77788775c7132a8d93c6930ab1bd84fc743c7cb7 (patch) | |
| tree | 2f5da76650d3d77b40923c6b632d23b8e15a4837 /drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | |
| parent | 5c8fe583cce542aa0b84adc939ce85293de36e5e (diff) | |
| download | linux-77788775c7132a8d93c6930ab1bd84fc743c7cb7.tar.xz | |
io_uring: don't assume mm is constant across submits
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>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c')
0 files changed, 0 insertions, 0 deletions