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authorAl Viro <viro@zeniv.linux.org.uk>2012-07-15 14:10:52 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2012-07-22 23:57:54 +0400
commit7266702805f9d824f92ce5c4069eca65d0f21d28 (patch)
tree2527195dccf6eec9dc20872dc820255df1ce5f4b /kernel
parent1e0ea0014479f066ba26f937e8740b8902229616 (diff)
downloadlinux-linaro-stable-7266702805f9d824f92ce5c4069eca65d0f21d28.tar.gz
signal: make sure we don't get stopped with pending task_work
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/signal.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/kernel/signal.c b/kernel/signal.c
index 677102789cf2..be4f856d52f8 100644
--- a/kernel/signal.c
+++ b/kernel/signal.c
@@ -1971,6 +1971,13 @@ static void ptrace_do_notify(int signr, int exit_code, int why)
void ptrace_notify(int exit_code)
{
BUG_ON((exit_code & (0x7f | ~0xffff)) != SIGTRAP);
+ if (unlikely(current->task_works)) {
+ if (test_and_clear_ti_thread_flag(current_thread_info(),
+ TIF_NOTIFY_RESUME)) {
+ smp_mb__after_clear_bit();
+ task_work_run();
+ }
+ }
spin_lock_irq(&current->sighand->siglock);
ptrace_do_notify(SIGTRAP, exit_code, CLD_TRAPPED);
@@ -2191,6 +2198,14 @@ int get_signal_to_deliver(siginfo_t *info, struct k_sigaction *return_ka,
struct signal_struct *signal = current->signal;
int signr;
+ if (unlikely(current->task_works)) {
+ if (test_and_clear_ti_thread_flag(current_thread_info(),
+ TIF_NOTIFY_RESUME)) {
+ smp_mb__after_clear_bit();
+ task_work_run();
+ }
+ }
+
if (unlikely(uprobe_deny_signal()))
return 0;