[PATCH 28/32] s390/traps: Unpoison the kernel_stack_overflow()'s pt_regs

Ilya Leoshkevich
2023-11-15T20:39:07Z

This is normally done by the generic entry code, but the
kernel_stack_overflow() flow bypasses it.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
arch/s390/kernel/traps.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 1d2aa448d103..dd7362806dbb 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -27,6 +27,7 @@
#include <linux/uaccess.h>
#include <linux/cpu.h>
#include <linux/entry-common.h>
+#include <linux/kmsan.h>
#include <asm/asm-extable.h>
#include <asm/fpu/api.h>
#include <asm/vtime.h>
@@ -260,6 +261,7 @@ static void monitor_event_exception(struct pt_regs *regs)

void kernel_stack_overflow(struct pt_regs *regs)
{
+ kmsan_unpoison_entry_regs(regs);
bust_spinlocks(1);
printk("Kernel stack overflow.\n");
show_regs(regs);
--
2.41.0