The patch titled
ptrace_signal: check PT_PTRACED before reporting a signal
has been added to the -mm tree. Its filename is
ptrace_signal-check-pt_ptraced-before-reporting-a-signal.patch
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------------------------------------------------------
Subject: ptrace_signal: check PT_PTRACED before reporting a signal
From: Oleg Nesterov <oleg@xxxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Alexey Dobriyan <adobriyan@xxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Tested-by: Ananth Mavinakayanahalli <ananth@xxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Cc: "Frank Ch. Eigler" <fche@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/signal.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN kernel/signal.c~ptrace_signal-check-pt_ptraced-before-reporting-a-signal kernel/signal.c
--- a/kernel/signal.c~ptrace_signal-check-pt_ptraced-before-reporting-a-signal
+++ a/kernel/signal.c
@@ -1767,7 +1767,7 @@ 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);
_
Patches currently in -mm which might be from oleg@xxxxxxxxxx are
origin.patch
linux-next.patch
posix-cpu-timers-reset-expire-cache-when-no-timer-is-running.patch
tracehooks-kill-some-pt_ptraced-checks.patch
tracehooks-check-pt_ptraced-before-reporting-the-single-step.patch
ptrace_signal-check-pt_ptraced-before-reporting-a-signal.patch
export-__ptrace_detach-and-do_notify_parent_cldstop.patch
reorder-the-code-in-kernel-ptracec.patch
implement-utrace-ptrace.patch
utrace-core.patch
copy_signal-cleanup-use-zalloc-and-remove-initializations.patch
copy_signal-cleanup-kill-taskstats_tgid_init-and-acct_init_pacct.patch
copy_signal-cleanup-clean-thread_group_cputime_init.patch
copy_signal-cleanup-clean-tty_audit_fork.patch
--
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