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authorCyrill Gorcunov <gorcunov@gmail.com>2008-05-12 14:02:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-05-13 08:02:26 -0700
commit43f14d856f013a4cc63da2c765617c665274338c (patch)
treef43026859c7fb6c6d9268fb0d6ff05fecb002652
parentd850a2fac11e4dd45d1d3d493a5a071b06c58c99 (diff)
eCryptFS: fix imbalanced mutex locking
Fix imbalanced calls for mutex lock/unlock on ecryptfs_daemon_hash_mux Revealed by Ingo Molnar: http://lkml.org/lkml/2008/5/7/260 Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Cc: Michael Halcrow <mhalcrow@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/ecryptfs/miscdev.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c
index 788995efd1d..6560da1a58c 100644
--- a/fs/ecryptfs/miscdev.c
+++ b/fs/ecryptfs/miscdev.c
@@ -257,12 +257,14 @@ ecryptfs_miscdev_read(struct file *file, char __user *buf, size_t count,
mutex_lock(&daemon->mux);
if (daemon->flags & ECRYPTFS_DAEMON_ZOMBIE) {
rc = 0;
+ mutex_unlock(&ecryptfs_daemon_hash_mux);
printk(KERN_WARNING "%s: Attempt to read from zombified "
"daemon\n", __func__);
goto out_unlock_daemon;
}
if (daemon->flags & ECRYPTFS_DAEMON_IN_READ) {
rc = 0;
+ mutex_unlock(&ecryptfs_daemon_hash_mux);
goto out_unlock_daemon;
}
/* This daemon will not go away so long as this flag is set */