From e2b5bcf9f5baec35c67ebe05c7713ae6fa9ef61f Mon Sep 17 00:00:00 2001 From: Zqiang Date: Thu, 29 Apr 2021 23:00:52 -0700 Subject: [PATCH] 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@windriver.com Signed-off-by: Zqiang Reviewed-by: Dmitry Vyukov Acked-by: Andrey Konovalov Cc: Andrey Ryabinin Cc: Alexander Potapenko Cc: Matthias Brugger Cc: Oleg Nesterov Cc: Walter Wu Cc: Frederic Weisbecker Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- kernel/irq_work.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/kernel/irq_work.c b/kernel/irq_work.c index e8da1e7..23a7a0b 100644 --- a/kernel/irq_work.c +++ b/kernel/irq_work.c @@ -19,7 +19,7 @@ #include #include #include - +#include 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 *work) 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 *work, int cpu) 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 */ -- 2.7.4