BACKPORT: Smack: Ptrace access check mode

When the ptrace security hooks were split the addition of
a mode parameter was not taken advantage of in the Smack
ptrace access check. This changes the access check from
always looking for read and write access to using the
passed mode. This will make use of /proc much happier.

Targeted for git://git.gitorious.org/smack-next/kernel.git

Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
(cherry-picked from upstream b5dfd8075bc26636d11c3d8888940198afbf5112)

diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 7d4913c1ab2487679b036f039a8812713fc2284a..a595a398a3fa21cd1e4f92a1b4583c6066516d63 100644 (file)
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -185,7 +185,7 @@ static int smack_ptrace_access_check(struct task_struct *ctp, unsigned int mode)
        smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK);
        smk_ad_setfield_u_tsk(&ad, ctp);
 
-       rc = smk_curacc(skp->smk_known, MAY_READWRITE, &ad);
+       rc = smk_curacc(skp->smk_known, mode, &ad);
        return rc;
 }