* [PATCH 3/7] ptrace_signal: check PT_PTRACED before reporting a signal
@ 2009-12-18 1:11 Oleg Nesterov
0 siblings, 0 replies; only message in thread
From: Oleg Nesterov @ 2009-12-18 1:11 UTC (permalink / raw)
To: Andrew Morton
Cc: Alexey Dobriyan, Andi Kleen, Ananth Mavinakayanahalli,
Christoph Hellwig, Frank Ch. Eigler, Ingo Molnar, Peter Zijlstra,
Roland McGrath, linux-kernel, utrace-devel
No functional changes, preparation for utrace-ptrace.
Change ptrace_signal() to check PT_PTRACED instead of task_ptrace() != 0.
Currently this is the same, PT_PTRACED must be always set if the task is
ptraced.
This change is needed to make sure ptrace_signal() does nothing if ptrace
is implemented on top of utrace, eventually this code will be removed
completely.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Oleg Nesterov <oleg@redhat.com>
---
kernel/signal.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- V1/kernel/signal.c~3_PTRACE_SIGNAL_CK_PTRACED 2009-12-18 00:20:50.000000000 +0100
+++ V1/kernel/signal.c 2009-12-18 00:48:35.000000000 +0100
@@ -1764,7 +1764,7 @@ static int do_signal_stop(int signr)
static int ptrace_signal(int signr, siginfo_t *info,
struct pt_regs *regs, void *cookie)
{
- if (!task_ptrace(current))
+ if (!(task_ptrace(current) & PT_PTRACED))
return signr;
ptrace_signal_deliver(regs, cookie);
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