From: keescook@chromium.org (Kees Cook)
To: linux-security-module@vger.kernel.org
Subject: [PATCH v3 15/15] exec: Consolidate pdeath_signal clearing
Date: Tue, 18 Jul 2017 15:25:36 -0700 [thread overview]
Message-ID: <1500416736-49829-16-git-send-email-keescook@chromium.org> (raw)
In-Reply-To: <1500416736-49829-1-git-send-email-keescook@chromium.org>
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>
---
fs/exec.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/fs/exec.c b/fs/exec.c
index 4227c1e56566..9525ac15b897 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1350,6 +1350,9 @@ 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
@@ -1382,10 +1385,6 @@ 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++;
--
2.7.4
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next prev parent reply other threads:[~2017-07-18 22:25 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-18 22:25 [PATCH v3 00/15] exec: Use sane stack rlimit under secureexec Kees Cook
2017-07-18 22:25 ` [PATCH v3 01/15] binfmt: Introduce secureexec flag Kees Cook
2017-07-19 0:05 ` John Johansen
2017-07-19 1:01 ` Andy Lutomirski
2017-07-18 22:25 ` [PATCH v3 02/15] exec: Rename bprm->cred_prepared to called_set_creds Kees Cook
2017-07-19 0:08 ` John Johansen
2017-07-19 1:06 ` Andy Lutomirski
2017-07-19 4:40 ` Kees Cook
2017-07-19 9:19 ` James Morris
2017-07-19 23:56 ` Paul Moore
2017-07-18 22:25 ` [PATCH v3 03/15] apparmor: Refactor to remove bprm_secureexec hook Kees Cook
2017-07-19 0:00 ` John Johansen
2017-07-19 9:21 ` James Morris
2017-07-18 22:25 ` [PATCH v3 04/15] selinux: " Kees Cook
2017-07-20 0:03 ` Paul Moore
2017-07-20 0:19 ` Paul Moore
2017-07-20 1:37 ` Kees Cook
2017-07-20 13:42 ` Paul Moore
2017-07-20 17:06 ` Kees Cook
2017-07-20 20:42 ` Paul Moore
2017-07-21 15:40 ` Paul Moore
2017-07-21 17:37 ` Kees Cook
2017-07-21 19:16 ` Paul Moore
2017-07-18 22:25 ` [PATCH v3 05/15] smack: " Kees Cook
2017-07-26 3:58 ` Kees Cook
2017-07-26 15:24 ` Casey Schaufler
2017-07-18 22:25 ` [PATCH v3 06/15] commoncap: " Kees Cook
2017-07-19 1:10 ` Andy Lutomirski
2017-07-19 4:41 ` Kees Cook
2017-07-20 4:53 ` Andy Lutomirski
2017-07-31 22:43 ` Kees Cook
2017-08-01 13:12 ` Andy Lutomirski
2017-07-19 9:26 ` James Morris
2017-07-18 22:25 ` [PATCH v3 07/15] commoncap: Move cap_elevated calculation into bprm_set_creds Kees Cook
2017-07-19 1:52 ` Andy Lutomirski
2017-07-19 9:28 ` James Morris
2017-07-18 22:25 ` [PATCH v3 08/15] LSM: drop bprm_secureexec hook Kees Cook
2017-07-19 0:02 ` John Johansen
2017-07-19 9:29 ` James Morris
2017-07-18 22:25 ` [PATCH v3 09/15] exec: Correct comments about "point of no return" Kees Cook
2017-07-19 0:45 ` Eric W. Biederman
2017-07-18 22:25 ` [PATCH v3 10/15] exec: Use secureexec for setting dumpability Kees Cook
2017-07-26 3:59 ` Kees Cook
2017-07-18 22:25 ` [PATCH v3 11/15] exec: Use secureexec for clearing pdeath_signal Kees Cook
2017-07-18 22:25 ` [PATCH v3 12/15] smack: Remove redundant pdeath_signal clearing Kees Cook
2017-07-18 22:25 ` [PATCH v3 13/15] exec: Consolidate dumpability logic Kees Cook
2017-07-18 22:25 ` [PATCH v3 14/15] exec: Use sane stack rlimit under secureexec Kees Cook
2017-07-19 9:42 ` James Morris
2017-07-18 22:25 ` Kees Cook [this message]
2017-07-18 23:03 ` [PATCH v3 00/15] " Linus Torvalds
2017-07-19 3:22 ` Serge E. Hallyn
2017-07-19 5:23 ` Kees Cook
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