From: Li Huafei <lihuafei1@xxxxxxxxxx> commit a365a65f9ca1ceb9cf1ac29db4a4f51df7c507ad upstream. Since kprobe_int3_handler() is called in do_int3(), probing do_int3() can cause a breakpoint recursion and crash the kernel. Therefore, do_int3() should be marked as NOKPROBE_SYMBOL. Fixes: 21e28290b317 ("x86/traps: Split int3 handler up") Signed-off-by: Li Huafei <lihuafei1@xxxxxxxxxx> Signed-off-by: Borislav Petkov <bp@xxxxxxx> Acked-by: Masami Hiramatsu <mhiramat@xxxxxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20220310120915.63349-1-lihuafei1@xxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/x86/kernel/traps.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -659,6 +659,7 @@ static bool do_int3(struct pt_regs *regs return res == NOTIFY_STOP; } +NOKPROBE_SYMBOL(do_int3); static void do_int3_user(struct pt_regs *regs) { Patches currently in stable-queue which might be from lihuafei1@xxxxxxxxxx are queue-5.16/x86-traps-mark-do_int3-nokprobe_symbol.patch