The patch titled
Subject: irq_work: record irq_work_queue() call stack
has been added to the -mm tree. Its filename is
irq_work-record-irq_work_queue-call-stack.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/irq_work-record-irq_work_queue-call-stack.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/irq_work-record-irq_work_queue-call-stack.patch
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------------------------------------------------------
From: Zqiang <qiang.zhang@xxxxxxxxxxxxx>
Subject: irq_work: record irq_work_queue() call stack
Add the irq_work_queue() call stack into the KASAN auxiliary stack in
order to improve KASAN reports. this will let us know where the irq work
be queued.
Link: https://lkml.kernel.org/r/20210331063202.28770-1-qiang.zhang@xxxxxxxxxxxxx
Signed-off-by: Zqiang <qiang.zhang@xxxxxxxxxxxxx>
Reviewed-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Acked-by: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Matthias Brugger <matthias.bgg@xxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: Walter Wu <walter-zh.wu@xxxxxxxxxxxx>
Cc: Frederic Weisbecker <frederic@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/irq_work.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
--- a/kernel/irq_work.c~irq_work-record-irq_work_queue-call-stack
+++ a/kernel/irq_work.c
@@ -19,7 +19,7 @@
#include <linux/notifier.h>
#include <linux/smp.h>
#include <asm/processor.h>
-
+#include <linux/kasan.h>
static DEFINE_PER_CPU(struct llist_head, raised_list);
static DEFINE_PER_CPU(struct llist_head, lazy_list);
@@ -70,6 +70,9 @@ bool irq_work_queue(struct irq_work *wor
if (!irq_work_claim(work))
return false;
+ /*record irq_work call stack in order to print it in KASAN reports*/
+ kasan_record_aux_stack(work);
+
/* Queue the entry and raise the IPI if needed. */
preempt_disable();
__irq_work_queue_local(work);
@@ -98,6 +101,8 @@ bool irq_work_queue_on(struct irq_work *
if (!irq_work_claim(work))
return false;
+ kasan_record_aux_stack(work);
+
preempt_disable();
if (cpu != smp_processor_id()) {
/* Arch remote IPI send/receive backend aren't NMI safe */
_
Patches currently in -mm which might be from qiang.zhang@xxxxxxxxxxxxx are
irq_work-record-irq_work_queue-call-stack.patch
lib-stackdepot-turn-depot_lock-spinlock-to-raw_spinlock.patch
