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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-07-15 14:10:52 +0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2012-07-22 23:57:54 +0400 |
| commit | 7266702805f9d824f92ce5c4069eca65d0f21d28 (patch) | |
| tree | 2527195dccf6eec9dc20872dc820255df1ce5f4b /kernel/signal.c | |
| parent | 1e0ea0014479f066ba26f937e8740b8902229616 (diff) | |
| download | lwn-7266702805f9d824f92ce5c4069eca65d0f21d28.tar.gz lwn-7266702805f9d824f92ce5c4069eca65d0f21d28.zip | |
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/signal.c')
| -rw-r--r-- | kernel/signal.c | 15 |
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(¤t->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; |