[GIT PULL] uprobes fix

[Ingo Molnar]

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