From: Stephen Smalley commit 4ac212ad4e8fafc22fa147fc255ff5fa5435cf33 upstream. 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: Greg Kroah-Hartman --- security/selinux/hooks.c | 3 +++ 1 file changed, 3 insertions(+) --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -1906,6 +1906,9 @@ static void selinux_bprm_post_apply_cred 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 -- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/