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| author | Robert Doebbelin <[email protected]> | 2016-03-07 08:50:56 +0000 |
|---|---|---|
| committer | Miklos Szeredi <[email protected]> | 2016-03-14 14:02:50 +0000 |
| commit | 7cabc61e01a0a8b663bd2b4c982aa53048218734 (patch) | |
| tree | 474f0a6e0cde183d19ccb0c9b14d2358e1944012 /net/switchdev/switchdev.c | |
| parent | Linux 4.5 (diff) | |
| download | kernel-7cabc61e01a0a8b663bd2b4c982aa53048218734.tar.gz kernel-7cabc61e01a0a8b663bd2b4c982aa53048218734.zip | |
fuse: do not use iocb after it may have been freed
There's a race in fuse_direct_IO(), whereby is_sync_kiocb() is called on an
iocb that could have been freed if async io has already completed. The fix
in this case is simple and obvious: cache the result before starting io.
It was discovered by KASan:
kernel: ==================================================================
kernel: BUG: KASan: use after free in fuse_direct_IO+0xb1a/0xcc0 at addr ffff88036c414390
Signed-off-by: Robert Doebbelin <[email protected]>
Signed-off-by: Miklos Szeredi <[email protected]>
Fixes: bcba24ccdc82 ("fuse: enable asynchronous processing direct IO")
Cc: <[email protected]> # 3.10+
Diffstat (limited to 'net/switchdev/switchdev.c')
0 files changed, 0 insertions, 0 deletions