| Message ID | 20231213233605.661251-31-iii@linux.ibm.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | kmsan: Enable on s390 | expand |
On Thu, Dec 14, 2023 at 12:24:50AM +0100, Ilya Leoshkevich wrote: > This is normally done by the generic entry code, but the > kernel_stack_overflow() flow bypasses it. > > Reviewed-by: Alexander Potapenko <glider@google.com> > Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> > --- > arch/s390/kernel/traps.c | 6 ++++++ > 1 file changed, 6 insertions(+) Acked-by: Heiko Carstens <hca@linux.ibm.com>
diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c index 1d2aa448d103..f299b1203a20 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 +261,11 @@ static void monitor_event_exception(struct pt_regs *regs) void kernel_stack_overflow(struct pt_regs *regs) { + /* + * Normally regs are unpoisoned by the generic entry code, but + * kernel_stack_overflow() is a rare case that is called bypassing it. + */ + kmsan_unpoison_entry_regs(regs); bust_spinlocks(1); printk("Kernel stack overflow.\n"); show_regs(regs);