From 1a4d21a23c4ca7467726be7db9ae8077a62b2c62 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Wed, 20 Oct 2021 12:43:55 -0500 Subject: [PATCH] signal/vm86_32: Replace open coded BUG_ON with an actual BUG_ON The function save_v86_state is only called when userspace was operating in vm86 mode before entering the kernel. Not having vm86 state in the task_struct should never happen. So transform the hand rolled BUG_ON into an actual BUG_ON to make it clear what is happening. Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: x86@kernel.org Cc: H Peter Anvin Link: https://lkml.kernel.org/r/20211020174406.17889-9-ebiederm@xmission.com Signed-off-by: Eric W. Biederman --- arch/x86/kernel/vm86_32.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/x86/kernel/vm86_32.c b/arch/x86/kernel/vm86_32.c index e5a7a10a0164..63486da77272 100644 --- a/arch/x86/kernel/vm86_32.c +++ b/arch/x86/kernel/vm86_32.c @@ -106,10 +106,8 @@ void save_v86_state(struct kernel_vm86_regs *regs, int retval) */ local_irq_enable(); - if (!vm86 || !vm86->user_vm86) { - pr_alert("no user_vm86: BAD\n"); - do_exit(SIGSEGV); - } + BUG_ON(!vm86 || !vm86->user_vm86); + set_flags(regs->pt.flags, VEFLAGS, X86_EFLAGS_VIF | vm86->veflags_mask); user = vm86->user_vm86; -- 2.11.0