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Date: Tue, 18 Jul 2017 15:25:33 -0700 From: Kees Cook <keescook@...omium.org> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Kees Cook <keescook@...omium.org>, Casey Schaufler <casey@...aufler-ca.com>, David Howells <dhowells@...hat.com>, "Eric W. Biederman" <ebiederm@...ssion.com>, John Johansen <john.johansen@...onical.com>, "Serge E. Hallyn" <serge@...lyn.com>, Paul Moore <paul@...l-moore.com>, Stephen Smalley <sds@...ho.nsa.gov>, Tetsuo Handa <penguin-kernel@...ove.SAKURA.ne.jp>, James Morris <james.l.morris@...cle.com>, Andy Lutomirski <luto@...nel.org>, Linus Torvalds <torvalds@...ux-foundation.org>, linux-fsdevel@...r.kernel.org, linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH v3 12/15] smack: Remove redundant pdeath_signal clearing 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@...aufler-ca.com> Signed-off-by: Kees Cook <keescook@...omium.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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