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[PATCH] autofs4: avoid panic on bind mount of autofs owned directory

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While this is not a solution to bind and move mounts on autofs owned
directories it is necessary to fix the trady error handling.

At least it avoids the kernel panic I observed checking out bug #4589.

Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Ian Kent
2005-06-21 17:16:38 -07:00
committed by Linus Torvalds
parent 8818760512
commit 9b1e3afd6d
3 changed files with 19 additions and 5 deletions
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5
fs/autofs4/expire.c
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@@ -56,12 +56,9 @@ static int autofs4_check_mount(struct vfsmount *mnt, struct dentry *dentry)
mntget(mnt);
dget(dentry);
if (!follow_down(&mnt, &dentry))
if (!autofs4_follow_mount(&mnt, &dentry))
goto done;
while (d_mountpoint(dentry) && follow_down(&mnt, &dentry))
;
/* This is an autofs submount, we can't expire it */
if (is_autofs4_dentry(dentry))
goto done;