diff options
Diffstat (limited to 'meta-agl-bsp/meta-ti/recipes-kernel/linux/files/0003-Smack-ignore-null-signal-in-smack_task_kill.patch')
-rw-r--r-- | meta-agl-bsp/meta-ti/recipes-kernel/linux/files/0003-Smack-ignore-null-signal-in-smack_task_kill.patch | 39 |
1 files changed, 0 insertions, 39 deletions
diff --git a/meta-agl-bsp/meta-ti/recipes-kernel/linux/files/0003-Smack-ignore-null-signal-in-smack_task_kill.patch b/meta-agl-bsp/meta-ti/recipes-kernel/linux/files/0003-Smack-ignore-null-signal-in-smack_task_kill.patch deleted file mode 100644 index c9180bb9f..000000000 --- a/meta-agl-bsp/meta-ti/recipes-kernel/linux/files/0003-Smack-ignore-null-signal-in-smack_task_kill.patch +++ /dev/null @@ -1,39 +0,0 @@ -From ec4eb03af07b0fbc330aecca6ac4ebd6accd8825 Mon Sep 17 00:00:00 2001 -From: Rafal Krypa <r.krypa@samsung.com> -Date: Mon, 4 Apr 2016 11:14:53 +0200 -Subject: [PATCH 3/4] Smack: ignore null signal in smack_task_kill - -Kill with signal number 0 is commonly used for checking PID existence. -Smack treated such cases like any other kills, although no signal is -actually delivered when sig == 0. - -Checking permissions when sig == 0 didn't prevent an unprivileged caller -from learning whether PID exists or not. When it existed, kernel returned -EPERM, when it didn't - ESRCH. The only effect of policy check in such -case is noise in audit logs. - -This change lets Smack silently ignore kill() invocations with sig == 0. - -Signed-off-by: Rafal Krypa <r.krypa@samsung.com> -Acked-by: Casey Schaufler <casey@schaufler-ca.com> ---- - security/smack/smack_lsm.c | 3 +++ - 1 file changed, 3 insertions(+) - -diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c -index b2bcb14..cf8a93f 100644 ---- a/security/smack/smack_lsm.c -+++ b/security/smack/smack_lsm.c -@@ -2239,6 +2239,9 @@ static int smack_task_kill(struct task_struct *p, struct siginfo *info, - struct smack_known *tkp = smk_of_task_struct(p); - int rc; - -+ if (!sig) -+ return 0; /* null signal; existence test */ -+ - smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_TASK); - smk_ad_setfield_u_tsk(&ad, p); - /* --- -2.7.4 - |