Messages in this thread Patch in this message | | | Date | Fri, 21 Feb 2020 14:34:19 +0100 | From | Peter Zijlstra <> | Subject | [PATCH v4 03/27] x86/entry: Flip _TIF_SIGPENDING and _TIF_NOTIFY_RESUME handling |
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Make sure we run task_work before we hit any kind of userspace -- very much including signals.
Suggested-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> --- arch/x86/entry/common.c | 8 usr/src/linux-2.6/arch/x86/entry/common.c | 440 ------------------------------ 2 files changed, 4 insertions(+), 444 deletions(-)
--- a/arch/x86/entry/common.c +++ b/arch/x86/entry/common.c @@ -155,16 +155,16 @@ static void exit_to_usermode_loop(struct if (cached_flags & _TIF_PATCH_PENDING) klp_update_patch_state(current); - /* deal with pending signal delivery */ - if (cached_flags & _TIF_SIGPENDING) - do_signal(regs); - if (cached_flags & _TIF_NOTIFY_RESUME) { clear_thread_flag(TIF_NOTIFY_RESUME); tracehook_notify_resume(regs); rseq_handle_notify_resume(NULL, regs); } + /* deal with pending signal delivery */ + if (cached_flags & _TIF_SIGPENDING) + do_signal(regs); + if (cached_flags & _TIF_USER_RETURN_NOTIFY) fire_user_return_notifiers();
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