From: Dmitry Vyukov <dvyukov@gmail.com>
To: catalin.marinas@arm.com, akpm@linux-foundation.org
Cc: Dmitry Vyukov <dvyukov@google.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH] kmemleak: fix check for softirq context
Date: Fri, 17 May 2019 19:15:07 +0200 [thread overview]
Message-ID: <20190517171507.96046-1-dvyukov@gmail.com> (raw)
From: Dmitry Vyukov <dvyukov@google.com>
in_softirq() is a wrong predicate to check if we are in a softirq context.
It also returns true if we have BH disabled, so objects are falsely
stamped with "softirq" comm. The correct predicate is in_serving_softirq().
Signed-off-by: Dmitry Vyukov <dvyukov@google.com>
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org
---
mm/kmemleak.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index e57bf810f7983..6584ff9778895 100644
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -588,7 +588,7 @@ static struct kmemleak_object *create_object(unsigned long ptr, size_t size,
if (in_irq()) {
object->pid = 0;
strncpy(object->comm, "hardirq", sizeof(object->comm));
- } else if (in_softirq()) {
+ } else if (in_serving_softirq()) {
object->pid = 0;
strncpy(object->comm, "softirq", sizeof(object->comm));
} else {
--
2.21.0.1020.gf2820cf01a-goog
next reply other threads:[~2019-05-17 17:15 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-17 17:15 Dmitry Vyukov [this message]
2019-05-17 21:37 ` [PATCH] kmemleak: fix check for softirq context Andrew Morton
2019-05-18 7:10 ` Dmitry Vyukov
2019-05-18 9:47 ` Catalin Marinas
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