mnt: Fix the error check in __detach_mounts

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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>

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Eric W. Biederman 2015-01-19 11:48:45 -06:00

parent ce07d891a0

commit f53e579751

1 changed files with 1 additions and 1 deletions

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fs/namespace.c

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