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Date: Sun, 15 Sep 2013 19:11:09 +0200 From: Oleg Nesterov <oleg@...hat.com> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Eric Paris <eparis@...hat.com>, Kees Cook <keescook@...omium.org>, Richard Guy Briggs <rgb@...hat.com>, Steve Grubb <sgrubb@...hat.com>, Zach Levis <zml@...ux.vnet.ibm.com>, linux-audit@...hat.com, linux-kernel@...r.kernel.org Subject: [PATCH v2 1/1] audit_alloc: clear TIF_SYSCALL_AUDIT if !audit_context If audit_filter_task() nacks the new thread it makes sense to clear TIF_SYSCALL_AUDIT which can be copied from parent by dup_task_struct(). A wrong TIF_SYSCALL_AUDIT is not really bad but it triggers the "slow" audit paths in entry.S to ensure the task can not miss audit_syscall_*() calls, this is pointless if the task has no ->audit_context. Signed-off-by: Oleg Nesterov <oleg@...hat.com> Acked-by: Steve Grubb <sgrubb@...hat.com> --- kernel/auditsc.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/kernel/auditsc.c b/kernel/auditsc.c index 9845cb3..95293ab 100644 --- a/kernel/auditsc.c +++ b/kernel/auditsc.c @@ -943,8 +943,10 @@ int audit_alloc(struct task_struct *tsk) return 0; /* Return if not auditing. */ state = audit_filter_task(tsk, &key); - if (state == AUDIT_DISABLED) + if (state == AUDIT_DISABLED) { + clear_tsk_thread_flag(tsk, TIF_SYSCALL_AUDIT); return 0; + } if (!(context = audit_alloc_context(state))) { kfree(key); -- 1.5.5.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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