Messages in this thread Patch in this message | | | From | Vincent Whitchurch <> | Subject | [PATCH] um: Prevent KASAN splats in dump_stack() | Date | Wed, 7 Sep 2022 12:05:33 +0200 |
| |
Use READ_ONCE_NOCHECK() when reading the stack to prevent KASAN splats when dump_stack() is used.
Fixes: 5b301409e8bc5d7fad ("UML: add support for KASAN under x86_64") Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com> --- arch/um/kernel/sysrq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/um/kernel/sysrq.c b/arch/um/kernel/sysrq.c index 7452f70d50d0..746715379f12 100644 --- a/arch/um/kernel/sysrq.c +++ b/arch/um/kernel/sysrq.c @@ -48,7 +48,8 @@ void show_stack(struct task_struct *task, unsigned long *stack, break; if (i && ((i % STACKSLOTS_PER_LINE) == 0)) pr_cont("\n"); - pr_cont(" %08lx", *stack++); + pr_cont(" %08lx", READ_ONCE_NOCHECK(*stack)); + stack++; } printk("%sCall Trace:\n", loglvl); -- 2.34.1
| |