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autofs: fix a leak in autofs_expire_indirect()

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if the second call of should_expire() in there ends up
grabbing and returning a new reference to dentry, we need
to drop it before continuing.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2019-10-25 00:03:11 -04:00
parent 97eba80fcc
commit 03ad0d703d
1 changed files with 3 additions and 2 deletions
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5
fs/autofs/expire.c
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@ -459,9 +459,10 @@ static struct dentry *autofs_expire_indirect(struct super_block *sb,
*/
how &= ~AUTOFS_EXP_LEAVES;
found = should_expire(expired, mnt, timeout, how);
if (!found || found != expired)
/* Something has changed, continue */
if (found != expired) { // something has changed, continue
dput(found);
goto next;
}
if (expired != dentry)
dput(dentry);