[Crash-utility] [PATCH v2 03/10] back_trace: don't check /proc if !LOCAL_ACTIVE()

[Oleg Nesterov]

On 04/25, Oleg Nesterov wrote:
>
> -	if (ACTIVE() && !INSTACK(esp, bt)) {
> +	if (LOCAL_ACTIVE() && !INSTACK(esp, bt)) {

Of course, this is wrong, please see v2 below.

-------------------------------------------------------------------------------
Subject: [PATCH v2 03/10] back_trace: don't check /proc if !LOCAL_ACTIVE()

Obviously the /proc/$tc->pid check can only make sense if LOCAL_ACTIVE().

Signed-off-by: Oleg Nesterov <oleg at redhat.com>
---
 kernel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel.c b/kernel.c
index a6fa7a6..cf0a6a0 100644
--- a/kernel.c
+++ b/kernel.c
@@ -2902,7 +2902,7 @@ back_trace(struct bt_info *bt)
 
 	if (ACTIVE() && !INSTACK(esp, bt)) {
 		sprintf(buf, "/proc/%ld", bt->tc->pid); 
-		if (!file_exists(buf, NULL))
+		if (!(LOCAL_ACTIVE() && file_exists(buf, NULL)))
 			error(INFO, "task no longer exists\n");
 		else 
 			error(INFO, 
-- 
2.5.0