From d289a630aa101eb5d168f054c96298c87673408e Mon Sep 17 00:00:00 2001 From: Stephen Smalley Date: Fri, 19 Oct 2007 01:27:51 +0200 Subject: [PATCH] SELinux: clear parent death signal on SID transitions Clear parent death signal on SID transitions to prevent unauthorized signaling between SIDs. Signed-off-by: Stephen Smalley Acked-by: Eric Paris Signed-off-by: James Morris Signed-off-by: Adrian Bunk --- security/selinux/hooks.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index b65c201e9ff5..d66485f863b2 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -1740,6 +1740,9 @@ static void selinux_bprm_post_apply_creds(struct linux_binprm *bprm) spin_unlock_irq(¤t->sighand->siglock); } + /* Always clear parent death signal on SID transitions. */ + current->pdeath_signal = 0; + /* Check whether the new SID can inherit resource limits from the old SID. If not, reset all soft limits to the lower of the current task's hard limit and the init -- 2.39.5