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exec: Consolidate pdeath_signal clearing 

Instead of an additional secureexec check for pdeath_signal, just move it
up into the initial secureexec test. Neither perf nor arch code touches
pdeath_signal, so the relocation shouldn't change anything.

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Serge Hallyn <serge@hallyn.com>
This commit is contained in:
Kees Cook 2017-07-18 15:25:36 -07:00
parent 64701dee41
commit fe8993b3a0
1 changed files with 3 additions and 4 deletions
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7
fs/exec.c
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@ -1351,6 +1351,9 @@ void setup_new_exec(struct linux_binprm * bprm)
bprm->secureexec |= bprm->cap_elevated;
if (bprm->secureexec) {
/* Make sure parent cannot signal privileged process. */
current->pdeath_signal = 0;
/*
* For secureexec, reset the stack limit to sane default to
* avoid bad behavior from the prior rlimits. This has to
@ -1383,10 +1386,6 @@ void setup_new_exec(struct linux_binprm * bprm)
*/
current->mm->task_size = TASK_SIZE;
if (bprm->secureexec) {
current->pdeath_signal = 0;
}
/* An exec changes our domain. We are no longer part of the thread
group */
current->self_exec_id++;