From: Kees Cook <keescook@chromium.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Kees Cook <keescook@chromium.org>,
Casey Schaufler <casey@schaufler-ca.com>,
David Howells <dhowells@redhat.com>,
"Eric W. Biederman" <ebiederm@xmission.com>,
John Johansen <john.johansen@canonical.com>,
"Serge E. Hallyn" <serge@hallyn.com>,
Paul Moore <paul@paul-moore.com>,
Stephen Smalley <sds@tycho.nsa.gov>,
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>,
James Morris <james.l.morris@oracle.com>,
Andy Lutomirski <luto@kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
linux-fsdevel@vger.kernel.org,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v3 12/15] smack: Remove redundant pdeath_signal clearing
Date: Tue, 18 Jul 2017 15:25:33 -0700 [thread overview]
Message-ID: <1500416736-49829-13-git-send-email-keescook@chromium.org> (raw)
In-Reply-To: <1500416736-49829-1-git-send-email-keescook@chromium.org>
This removes the redundant pdeath_signal clearing in Smack: the check in
smack_bprm_committing_creds() matches the check in smack_bprm_set_creds()
(which used to be in the now-removed smack_bprm_securexec() hook) and
since secureexec is now being checked for clearing pdeath_signal, this
is redundant to the common exec code.
Cc: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
---
security/smack/smack_lsm.c | 15 ---------------
1 file changed, 15 deletions(-)
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 4f1967be3d20..4e33c650b224 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -957,20 +957,6 @@ static int smack_bprm_set_creds(struct linux_binprm *bprm)
return 0;
}
-/**
- * smack_bprm_committing_creds - Prepare to install the new credentials
- * from bprm.
- *
- * @bprm: binprm for exec
- */
-static void smack_bprm_committing_creds(struct linux_binprm *bprm)
-{
- struct task_smack *bsp = bprm->cred->security;
-
- if (bsp->smk_task != bsp->smk_forked)
- current->pdeath_signal = 0;
-}
-
/*
* Inode hooks
*/
@@ -4633,7 +4619,6 @@ static struct security_hook_list smack_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(sb_parse_opts_str, smack_parse_opts_str),
LSM_HOOK_INIT(bprm_set_creds, smack_bprm_set_creds),
- LSM_HOOK_INIT(bprm_committing_creds, smack_bprm_committing_creds),
LSM_HOOK_INIT(inode_alloc_security, smack_inode_alloc_security),
LSM_HOOK_INIT(inode_free_security, smack_inode_free_security),
--
2.7.4
WARNING: multiple messages have this Message-ID (diff)
From: keescook@chromium.org (Kees Cook)
To: linux-security-module@vger.kernel.org
Subject: [PATCH v3 12/15] smack: Remove redundant pdeath_signal clearing
Date: Tue, 18 Jul 2017 15:25:33 -0700 [thread overview]
Message-ID: <1500416736-49829-13-git-send-email-keescook@chromium.org> (raw)
In-Reply-To: <1500416736-49829-1-git-send-email-keescook@chromium.org>
This removes the redundant pdeath_signal clearing in Smack: the check in
smack_bprm_committing_creds() matches the check in smack_bprm_set_creds()
(which used to be in the now-removed smack_bprm_securexec() hook) and
since secureexec is now being checked for clearing pdeath_signal, this
is redundant to the common exec code.
Cc: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
---
security/smack/smack_lsm.c | 15 ---------------
1 file changed, 15 deletions(-)
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 4f1967be3d20..4e33c650b224 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -957,20 +957,6 @@ static int smack_bprm_set_creds(struct linux_binprm *bprm)
return 0;
}
-/**
- * smack_bprm_committing_creds - Prepare to install the new credentials
- * from bprm.
- *
- * @bprm: binprm for exec
- */
-static void smack_bprm_committing_creds(struct linux_binprm *bprm)
-{
- struct task_smack *bsp = bprm->cred->security;
-
- if (bsp->smk_task != bsp->smk_forked)
- current->pdeath_signal = 0;
-}
-
/*
* Inode hooks
*/
@@ -4633,7 +4619,6 @@ static struct security_hook_list smack_hooks[] __lsm_ro_after_init = {
LSM_HOOK_INIT(sb_parse_opts_str, smack_parse_opts_str),
LSM_HOOK_INIT(bprm_set_creds, smack_bprm_set_creds),
- LSM_HOOK_INIT(bprm_committing_creds, smack_bprm_committing_creds),
LSM_HOOK_INIT(inode_alloc_security, smack_inode_alloc_security),
LSM_HOOK_INIT(inode_free_security, smack_inode_free_security),
--
2.7.4
--
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next prev parent reply other threads:[~2017-07-18 22:27 UTC|newest]
Thread overview: 104+ 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 ` Kees Cook
2017-07-18 22:25 ` [PATCH v3 01/15] binfmt: Introduce secureexec flag Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-19 0:05 ` John Johansen
2017-07-19 0:05 ` John Johansen
2017-07-19 1:01 ` Andy Lutomirski
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
2017-07-18 22:25 ` Kees Cook
2017-07-19 0:08 ` John Johansen
2017-07-19 0:08 ` John Johansen
2017-07-19 1:06 ` Andy Lutomirski
2017-07-19 1:06 ` Andy Lutomirski
2017-07-19 4:40 ` Kees Cook
2017-07-19 4:40 ` Kees Cook
2017-07-19 9:19 ` James Morris
2017-07-19 9:19 ` James Morris
2017-07-19 23:56 ` Paul Moore
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
2017-07-18 22:25 ` Kees Cook
2017-07-19 0:00 ` John Johansen
2017-07-19 0:00 ` John Johansen
2017-07-19 9:21 ` James Morris
2017-07-19 9:21 ` James Morris
2017-07-18 22:25 ` [PATCH v3 04/15] selinux: " Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-20 0:03 ` Paul Moore
2017-07-20 0:03 ` Paul Moore
2017-07-20 0:19 ` Paul Moore
2017-07-20 0:19 ` Paul Moore
2017-07-20 1:37 ` Kees Cook
2017-07-20 1:37 ` Kees Cook
2017-07-20 13:42 ` Paul Moore
2017-07-20 13:42 ` Paul Moore
2017-07-20 17:06 ` Kees Cook
2017-07-20 17:06 ` Kees Cook
2017-07-20 20:42 ` Paul Moore
2017-07-20 20:42 ` Paul Moore
2017-07-21 15:40 ` Paul Moore
2017-07-21 15:40 ` Paul Moore
2017-07-21 17:37 ` Kees Cook
2017-07-21 17:37 ` Kees Cook
2017-07-21 19:16 ` Paul Moore
2017-07-21 19:16 ` Paul Moore
2017-07-18 22:25 ` [PATCH v3 05/15] smack: " Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-26 3:58 ` Kees Cook
2017-07-26 3:58 ` Kees Cook
2017-07-26 15:24 ` Casey Schaufler
2017-07-26 15:24 ` Casey Schaufler
2017-07-18 22:25 ` [PATCH v3 06/15] commoncap: " Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-19 1:10 ` Andy Lutomirski
2017-07-19 1:10 ` Andy Lutomirski
2017-07-19 4:41 ` Kees Cook
2017-07-19 4:41 ` Kees Cook
2017-07-20 4:53 ` Andy Lutomirski
2017-07-20 4:53 ` Andy Lutomirski
2017-07-31 22:43 ` Kees Cook
2017-07-31 22:43 ` Kees Cook
2017-08-01 13:12 ` Andy Lutomirski
2017-08-01 13:12 ` Andy Lutomirski
2017-07-19 9:26 ` James Morris
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
2017-07-18 22:25 ` Kees Cook
2017-07-19 1:52 ` Andy Lutomirski
2017-07-19 1:52 ` Andy Lutomirski
2017-07-19 9:28 ` James Morris
2017-07-19 9:28 ` James Morris
2017-07-18 22:25 ` [PATCH v3 08/15] LSM: drop bprm_secureexec hook Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-19 0:02 ` John Johansen
2017-07-19 0:02 ` John Johansen
2017-07-19 9:29 ` James Morris
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
2017-07-18 22:25 ` Kees Cook
2017-07-19 0:45 ` Eric W. Biederman
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
2017-07-18 22:25 ` Kees Cook
2017-07-26 3:59 ` 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 ` Kees Cook
2017-07-18 22:25 ` Kees Cook [this message]
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 ` Kees Cook
2017-07-18 22:25 ` [PATCH v3 14/15] exec: Use sane stack rlimit under secureexec Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-19 9:42 ` James Morris
2017-07-19 9:42 ` James Morris
2017-07-18 22:25 ` [PATCH v3 15/15] exec: Consolidate pdeath_signal clearing Kees Cook
2017-07-18 22:25 ` Kees Cook
2017-07-18 23:03 ` [PATCH v3 00/15] exec: Use sane stack rlimit under secureexec Linus Torvalds
2017-07-18 23:03 ` Linus Torvalds
2017-07-19 3:22 ` Serge E. Hallyn
2017-07-19 3:22 ` Serge E. Hallyn
2017-07-19 5:23 ` Kees Cook
2017-07-19 5:23 ` Kees Cook
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