[GIT PULL] uprobes fix

* [GIT PULL] uprobes fix
@ 2020-07-25 12:05 Ingo Molnar
  2020-07-25 22:30 ` pr-tracker-bot
  0 siblings, 1 reply; 2+ messages in thread
From: Ingo Molnar @ 2020-07-25 12:05 UTC (permalink / raw)
  To: Linus Torvalds
  Cc: linux-kernel, Peter Zijlstra, Thomas Gleixner, Andrew Morton

Linus,

Please pull the latest perf/urgent git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git perf-urgent-2020-07-25

   # HEAD: fe5ed7ab99c656bd2f5b79b49df0e9ebf2cead8a uprobes: Change handle_swbp() to send SIGTRAP with si_code=SI_KERNEL, to fix GDB regression

Fix a interaction/regression between uprobes based shared library tracing & GDB.

 Thanks,

	Ingo

------------------>
Oleg Nesterov (1):
      uprobes: Change handle_swbp() to send SIGTRAP with si_code=SI_KERNEL, to fix GDB regression


 kernel/events/uprobes.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index bb0862873dba..5f8b0c52fd2e 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -2199,7 +2199,7 @@ static void handle_swbp(struct pt_regs *regs)
 	if (!uprobe) {
 		if (is_swbp > 0) {
 			/* No matching uprobe; signal SIGTRAP. */
-			send_sig(SIGTRAP, current, 0);
+			force_sig(SIGTRAP);
 		} else {
 			/*
 			 * Either we raced with uprobe_unregister() or we can't

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