diff options
| author | Robert Doebbelin <robert@quobyte.com> | 2016-03-07 09:50:56 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-04-12 09:08:58 -0700 |
| commit | 32b9807433507058fce25092a0d11abac494d00d (patch) | |
| tree | 04975cd6f8afea52e7480522830b40963a55e706 /kernel/sysctl_binary.c | |
| parent | 2775a60447ae12350711b443be1083117b6f13b8 (diff) | |
fuse: do not use iocb after it may have been freed
commit 7cabc61e01a0a8b663bd2b4c982aa53048218734 upstream.
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 <robert@quobyte.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Fixes: bcba24ccdc82 ("fuse: enable asynchronous processing direct IO")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/sysctl_binary.c')
0 files changed, 0 insertions, 0 deletions