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Commit 33e9fc7d authored by Oleg Nesterov's avatar Oleg Nesterov Committed by Linus Torvalds
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ptrace: ptrace_attach: use send_sig_info() instead force_sig_specific() 



Nobody can block/ignore SIGSTOP, no need to use force_sig_specific() in
ptrace_attach.  Use the "regular" send_sig_info().

With this patch stracing of /sbin/init doesn't clear its SIGNAL_UNKILLABLE,
but not that this makes ptracing of init safe.

Signed-off-by: default avatarOleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 68cb9478

kernel/ptrace.c

+1 −2
Original line number Diff line number Diff line
@@ -208,8 +208,7 @@ int ptrace_attach(struct task_struct *task) 


	__ptrace_link(task, current);



	force_sig_specific(SIGSTOP, task);



	send_sig_info(SIGSTOP, SEND_SIG_FORCED, task);

bad:

	write_unlock_irqrestore(&tasklist_lock, flags);

	task_unlock(task);