utrace_get_signal() checks JOBCTL_STOP_PENDING to detect the
case when we should not try to dequeue the signal but should
try to participate in the group-stop.
With the recent changes this is not enough, everything which
contrbutes to recalc_sigpending_tsk() should be respected.
Check JOBCTL_PENDING_MASK instead. This matches the
JOBCTL_STOP_PENDING | JOBCTL_TRAP_MASK code in the caller,
get_signal_to_deliver(). Note that this code won't run if
utrace_get_signal() returns signr > 0.
Signed-off-by: Oleg Nesterov <oleg@xxxxxxxxxx>
---
kernel/utrace.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/kernel/utrace.c b/kernel/utrace.c
index d41b982..0bb0a06 100644
--- a/kernel/utrace.c
+++ b/kernel/utrace.c
@@ -2027,7 +2027,7 @@ int utrace_get_signal(struct task_struct *task, struct pt_regs *regs,
ka = NULL;
memset(return_ka, 0, sizeof *return_ka);
} else if (!(task->utrace_flags & UTRACE_EVENT_SIGNAL_ALL) ||
- unlikely(task->jobctl & JOBCTL_STOP_PENDING)) {
+ unlikely(task->jobctl & JOBCTL_PENDING_MASK)) {
/*
* If no engine is interested in intercepting signals or
* we must stop, let the caller just dequeue them normally
--
1.5.5.1
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