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 v4 12/15] smack: Remove redundant pdeath_signal clearing
Date: Mon, 31 Jul 2017 16:51:30 -0700 [thread overview]
Message-ID: <1501545093-56634-13-git-send-email-keescook@chromium.org> (raw)
In-Reply-To: <1501545093-56634-1-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>
Acked-by: Serge Hallyn <serge@hallyn.com>
---
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 v4 12/15] smack: Remove redundant pdeath_signal clearing
Date: Mon, 31 Jul 2017 16:51:30 -0700 [thread overview]
Message-ID: <1501545093-56634-13-git-send-email-keescook@chromium.org> (raw)
In-Reply-To: <1501545093-56634-1-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>
Acked-by: Serge Hallyn <serge@hallyn.com>
---
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:[~2017-07-31 23:53 UTC|newest]
Thread overview: 72+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-31 23:51 [PATCH v4 00/15] exec: Use sane stack rlimit under secureexec Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-07-31 23:51 ` [PATCH v4 01/15] exec: Rename bprm->cred_prepared to called_set_creds Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-07-31 23:51 ` [PATCH v4 02/15] exec: Correct comments about "point of no return" Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-07-31 23:51 ` [PATCH v4 03/15] binfmt: Introduce secureexec flag Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-08-01 0:23 ` Kees Cook
2017-08-01 0:23 ` Kees Cook
2017-08-01 0:44 ` James Morris
2017-08-01 0:44 ` James Morris
2017-07-31 23:51 ` [PATCH v4 04/15] apparmor: Refactor to remove bprm_secureexec hook Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-07-31 23:51 ` [PATCH v4 05/15] selinux: " Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-08-01 0:45 ` James Morris
2017-08-01 0:45 ` James Morris
2017-08-01 13:24 ` Andy Lutomirski
2017-08-01 13:24 ` Andy Lutomirski
2017-07-31 23:51 ` [PATCH v4 06/15] smack: " Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-08-01 0:46 ` James Morris
2017-08-01 0:46 ` James Morris
2017-08-01 15:24 ` Casey Schaufler
2017-08-01 15:24 ` Casey Schaufler
2017-07-31 23:51 ` [PATCH v4 07/15] commoncap: " Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-07-31 23:51 ` [PATCH v4 08/15] commoncap: Move cap_elevated calculation into bprm_set_creds Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-08-01 13:46 ` Andy Lutomirski
2017-08-01 13:46 ` Andy Lutomirski
2017-07-31 23:51 ` [PATCH v4 09/15] LSM: drop bprm_secureexec hook Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-07-31 23:51 ` [PATCH v4 10/15] exec: Use secureexec for setting dumpability Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-08-01 0:48 ` James Morris
2017-08-01 0:48 ` James Morris
2017-07-31 23:51 ` [PATCH v4 11/15] exec: Use secureexec for clearing pdeath_signal Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-08-01 0:50 ` James Morris
2017-08-01 0:50 ` James Morris
2017-07-31 23:51 ` Kees Cook [this message]
2017-07-31 23:51 ` [PATCH v4 12/15] smack: Remove redundant pdeath_signal clearing Kees Cook
2017-08-01 0:50 ` James Morris
2017-08-01 0:50 ` James Morris
2017-08-01 15:24 ` Casey Schaufler
2017-08-01 15:24 ` Casey Schaufler
2017-07-31 23:51 ` [PATCH v4 13/15] exec: Consolidate dumpability logic Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-07-31 23:51 ` [PATCH v4 14/15] exec: Use sane stack rlimit under secureexec Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-07-31 23:51 ` [PATCH v4 15/15] exec: Consolidate pdeath_signal clearing Kees Cook
2017-07-31 23:51 ` Kees Cook
2017-08-01 0:52 ` James Morris
2017-08-01 0:52 ` James Morris
2017-08-01 0:34 ` [PATCH v4 00/15] exec: Use sane stack rlimit under secureexec Kees Cook
2017-08-01 0:34 ` Kees Cook
2017-08-01 0:54 ` James Morris
2017-08-01 0:54 ` James Morris
2017-08-01 3:03 ` Kees Cook
2017-08-01 3:03 ` Kees Cook
2017-08-01 5:11 ` Linus Torvalds
2017-08-01 5:11 ` Linus Torvalds
2017-08-01 5:14 ` Linus Torvalds
2017-08-01 5:14 ` Linus Torvalds
2017-08-01 15:04 ` Kees Cook
2017-08-01 15:04 ` Kees Cook
2017-08-01 20:19 ` Linus Torvalds
2017-08-01 20:19 ` Linus Torvalds
2017-08-01 21:04 ` Kees Cook
2017-08-01 21:04 ` Kees Cook
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