From 9a1889f5fe6c7e6bdec1a0fed1892a287fe40e4a Mon Sep 17 00:00:00 2001 From: Lin Yujun Date: Mon, 22 May 2023 02:56:08 +0000 Subject: [PATCH] hexagon: Fix unbalanced spinlock in die() [ Upstream commit 03410e87563a122075c3721acc7d5510e41d8332 ] die executes holding the spinlock of &die.lock and unlock it after printing the oops message. However in the code if the notify_die() returns NOTIFY_STOP , die() exit with returning 1 but never unlocked the spinlock. Fix this by adding spin_unlock_irq(&die.lock) before returning. Fixes: cf9750bae262 ("Hexagon: Provide basic debugging and system trap support.") Signed-off-by: Lin Yujun Link: https://lore.kernel.org/r/20230522025608.2515558-1-linyujun809@huawei.com Signed-off-by: Brian Cain Signed-off-by: Brian Cain Signed-off-by: Sasha Levin --- arch/hexagon/kernel/traps.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/hexagon/kernel/traps.c b/arch/hexagon/kernel/traps.c index 6447763ce5a9..b7e394cebe20 100644 --- a/arch/hexagon/kernel/traps.c +++ b/arch/hexagon/kernel/traps.c @@ -195,8 +195,10 @@ int die(const char *str, struct pt_regs *regs, long err) printk(KERN_EMERG "Oops: %s[#%d]:\n", str, ++die.counter); if (notify_die(DIE_OOPS, str, regs, err, pt_cause(regs), SIGSEGV) == - NOTIFY_STOP) + NOTIFY_STOP) { + spin_unlock_irq(&die.lock); return 1; + } print_modules(); show_regs(regs);