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eCryptfs: use after free in ecryptfs_release_messaging() 

We're freeing the list iterator so we should be using the _safe()
version of hlist_for_each_entry().

Fixes: 88b4a07e66 ("[PATCH] eCryptfs: Public key transport mechanism")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
This commit is contained in:
Dan Carpenter 2017-08-22 23:41:28 +03:00 committed by Tyler Hicks
parent abbae6d560
commit db86be3a12
1 changed files with 4 additions and 3 deletions
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7
fs/ecryptfs/messaging.c
View File

@ -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 "