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authorCasey Schaufler <casey@schaufler-ca.com>2011-02-09 19:58:42 -0800
committerCasey Schaufler <casey@schaufler-ca.com>2011-02-09 19:58:42 -0800
commit75a25637bf8a1b8fbed2368c0a3ec15c66a534f1 (patch)
tree038d52827d9a285fed1bb384f06d7adabf4ef674
parentdb904aa8147440b750a35d58befed38155a1abb9 (diff)
downloadvexpress-lsk-75a25637bf8a1b8fbed2368c0a3ec15c66a534f1.tar.gz
Smack: correct final mmap check comparison
The mmap policy enforcement checks the access of the SMACK64MMAP subject against the current subject incorrectly. The check as written works correctly only if the access rules involved have the same access. This is the common case, so initial testing did not find a problem. Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
-rw-r--r--security/smack/smack_lsm.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 92cb71507f5..5ab3f39442f 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -1218,7 +1218,7 @@ static int smack_file_mmap(struct file *file,
* not available to a SMACK64MMAP subject
* deny access.
*/
- if ((may | mmay) != may) {
+ if ((may | mmay) != mmay) {
rc = -EACCES;
break;
}