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exec: kill task_struct->did_exec

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We can kill either task->did_exec or PF_FORKNOEXEC, they are mutually
exclusive.  The patch kills ->did_exec because it has a single user.

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Oleg Nesterov 2014-01-23 15:55:52 -08:00 • committed by Linus Torvalds
parent 63e46b95e9
commit 98611e4e6a
4 changed files with 2 additions and 6 deletions
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1
kernel/fork.c
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@ -1226,7 +1226,6 @@ static struct task_struct *copy_process(unsigned long clone_flags,
if (!try_module_get(task_thread_info(p)->exec_domain->module))
goto bad_fork_cleanup_count;
p->did_exec = 0;
delayacct_tsk_init(p); /* Must remain after dup_task_struct() */
copy_flags(clone_flags, p);
INIT_LIST_HEAD(&p->children);