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sched: fix kasan report error when open CONFIG_DEBUG_MM

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reason:
1. g_running_tasks = thread A
2. thread A exit (free thread A's tcb) -> thread B
3. thread B interrupt by irq
4. check g_running_tasks->flags -> kasan report used after free

rootcause:
g_running_tasks has't set completely when syscall hanppened

Resolve:
Use rtcb (get at ISR begining) instead

Signed-off-by: ligd <liguiding1@xiaomi.com>
This commit is contained in:
ligd
2022-09-08 22:38:45 +08:00
committed by Petro Karashchenko
parent ed85055edb
commit 10529c7d0a
1 changed files with 4 additions and 1 deletions
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sched/irq/irq_dispatch.c
+4 -1
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@@ -124,6 +124,9 @@
void irq_dispatch(int irq, FAR void *context) void irq_dispatch(int irq, FAR void *context)
{ {
#ifdef CONFIG_DEBUG_MM
struct tcb_s *rtcb = this_task();
#endif
xcpt_t vector = irq_unexpected_isr; xcpt_t vector = irq_unexpected_isr;
FAR void *arg = NULL; FAR void *arg = NULL;
unsigned int ndx = irq; unsigned int ndx = irq;
@@ -175,7 +178,7 @@ void irq_dispatch(int irq, FAR void *context)
#endif #endif
#ifdef CONFIG_DEBUG_MM #ifdef CONFIG_DEBUG_MM
if ((g_running_tasks[this_cpu()]->flags & TCB_FLAG_HEAPCHECK) || \ if ((rtcb->flags & TCB_FLAG_HEAPCHECK) || \
(this_task()->flags & TCB_FLAG_HEAPCHECK)) (this_task()->flags & TCB_FLAG_HEAPCHECK))
{ {
kmm_checkcorruption(); kmm_checkcorruption();