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ptrace: ptrace_attach: use send_sig_info() instead force_sig_specific()

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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: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
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 2008-04-30 00:53:14 -07:00 committed by Linus Torvalds
parent 68cb947866
commit 33e9fc7d01
1 changed files with 1 additions and 2 deletions
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3
kernel/ptrace.c
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@ -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);