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-rw-r--r--kernel/signal.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 0a1bf2c8bdcd..c34f8f899b76 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -2084,12 +2084,17 @@ static void do_jobctl_trap(void)
static int ptrace_signal(int signr, siginfo_t *info,
struct pt_regs *regs, void *cookie)
{
- if (!current->ptrace)
- return signr;
-
ptrace_signal_deliver(regs, cookie);
-
- /* Let the debugger run. */
+ /*
+ * We do not check sig_kernel_stop(signr) but set this marker
+ * unconditionally because we do not know whether debugger will
+ * change signr. This flag has no meaning unless we are going
+ * to stop after return from ptrace_stop(). In this case it will
+ * be checked in do_signal_stop(), we should only stop if it was
+ * not cleared by SIGCONT while we were sleeping. See also the
+ * comment in dequeue_signal().
+ */
+ current->jobctl |= JOBCTL_STOP_DEQUEUED;
ptrace_stop(signr, CLD_TRAPPED, 0, info);
/* We're back. Did the debugger cancel the sig? */
@@ -2193,7 +2198,7 @@ relock:
if (!signr)
break; /* will return 0 */
- if (signr != SIGKILL) {
+ if (unlikely(current->ptrace) && signr != SIGKILL) {
signr = ptrace_signal(signr, info,
regs, cookie);
if (!signr)