Messages in this thread Patch in this message | | | Date | Tue, 18 Mar 2008 19:33:20 +0300 | From | Oleg Nesterov <> | Subject | [PATCH] ptrace: ptrace_attach: use send_sig_info() instead force_sig_specific() |
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(depends on signals-send_sig_info-dont-take-tasklist_lock.patch)
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>
--- 25/kernel/ptrace.c~5_PTRACE_STOP_NO_FORCE 2008-03-16 18:33:02.000000000 +0300 +++ 25/kernel/ptrace.c 2008-03-18 19:15:54.000000000 +0300 @@ -217,8 +217,7 @@ repeat: __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);
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