1 files changed, 7 insertions, 3 deletions

diff --git a/arch/x86/kernel/hw_breakpoint.c b/arch/x86/kernel/hw_breakpoint.c
index bb6006e3e295..dca2802c666f 100644
--- a/arch/x86/kernel/hw_breakpoint.c
+++ b/arch/x86/kernel/hw_breakpoint.c
@@ -486,8 +486,6 @@ static int __kprobes hw_breakpoint_handler(struct die_args *args)
                 rcu_read_lock();
 
                 bp = per_cpu(bp_per_reg[i], cpu);
-                if (bp)
-                        rc = NOTIFY_DONE;
                 /*
                  * Reset the 'i'th TRAP bit in dr6 to denote completion of
                  * exception handling
@@ -506,7 +504,13 @@ static int __kprobes hw_breakpoint_handler(struct die_args *args)
 
                 rcu_read_unlock();
         }
-        if (dr6 & (~DR_TRAP_BITS))
+        /*
+         * Further processing in do_debug() is needed for a) user-space
+         * breakpoints (to generate signals) and b) when the system has
+         * taken exception due to multiple causes
+         */
+        if ((current->thread.debugreg6 & DR_TRAP_BITS) ||
+            (dr6 & (~DR_TRAP_BITS)))
                 rc = NOTIFY_DONE;
 
         set_debugreg(dr7, 7);