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authorEric W. Biederman <ebiederm@xmission.com>2015-01-19 18:48:45 +0100
committerEric W. Biederman <ebiederm@xmission.com>2015-04-09 18:39:56 +0200
commitf53e57975151f54ad8caa1b0ac8a78091cd5700a (patch)
tree7322a985d8f37d229cdb6ef66ddae5bf218b9df6 /fs/super.c
parentmnt: Honor MNT_LOCKED when detaching mounts (diff)
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mnt: Fix the error check in __detach_mounts
lookup_mountpoint can return either NULL or an error value. Update the test in __detach_mounts to test for an error value to avoid pathological cases causing a NULL pointer dereferences. The callers of __detach_mounts should prevent it from ever being called on an unlinked dentry but don't take any chances. Cc: stable@vger.kernel.org Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'fs/super.c')
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