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authorDan Carpenter <dan.carpenter@oracle.com>2017-08-22 23:41:28 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2017-11-30 08:37:20 +0000
commit9c093a258350e86f781f23fbbef4e3d761c6b1e3 (patch)
tree8cd0124cfe8ab11db735303b87ceeedb9369415b /fs/ecryptfs
parent7d7b05e4ffd5ad7cf54b57dfc2f377d9a543c8c6 (diff)
eCryptfs: use after free in ecryptfs_release_messaging()
commit db86be3a12d0b6e5c5b51c2ab2a48f06329cb590 upstream. We're freeing the list iterator so we should be using the _safe() version of hlist_for_each_entry(). Fixes: 88b4a07e6610 ("[PATCH] eCryptfs: Public key transport mechanism") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Tyler Hicks <tyhicks@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/ecryptfs')
-rw-r--r--fs/ecryptfs/messaging.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/fs/ecryptfs/messaging.c b/fs/ecryptfs/messaging.c
index 286f10b0363b..4f457d5c4933 100644
--- a/fs/ecryptfs/messaging.c
+++ b/fs/ecryptfs/messaging.c
@@ -442,15 +442,16 @@ void ecryptfs_release_messaging(void)
}
if (ecryptfs_daemon_hash) {
struct ecryptfs_daemon *daemon;
+ struct hlist_node *n;
int i;
mutex_lock(&ecryptfs_daemon_hash_mux);
for (i = 0; i < (1 << ecryptfs_hash_bits); i++) {
int rc;
- hlist_for_each_entry(daemon,
- &ecryptfs_daemon_hash[i],
- euid_chain) {
+ hlist_for_each_entry_safe(daemon, n,
+ &ecryptfs_daemon_hash[i],
+ euid_chain) {
rc = ecryptfs_exorcise_daemon(daemon);
if (rc)
printk(KERN_ERR "%s: Error whilst "