linux-kernel - [PATCH v4 3/4] MIPS: Return earlier in die() if notify_die() returns NOTIFY

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Message-Id: <1692434183-2054-4-git-send-email-yangtiezhu@loongson.cn>
Date:   Sat, 19 Aug 2023 16:36:22 +0800
From:   Tiezhu Yang <yangtiezhu@...ngson.cn>
To:     Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc:     "Maciej W. Rozycki" <macro@...am.me.uk>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        loongson-kernel@...ts.loongnix.cn
Subject: [PATCH v4 3/4] MIPS: Return earlier in die() if notify_die() returns NOTIFY_STOP

After the call to oops_exit(), it should not panic or execute
the crash kernel if the oops is to be suppressed.

Suggested-by: Maciej W. Rozycki <macro@...am.me.uk>
Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 arch/mips/kernel/traps.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index 8e528a8..fd770dc 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -412,6 +412,9 @@ void die(const char *str, struct pt_regs *regs)
 
 	oops_exit();
 
+	if (ret == NOTIFY_STOP)
+		return;
+
 	if (in_interrupt())
 		panic("Fatal exception in interrupt");
 
@@ -421,8 +424,7 @@ void die(const char *str, struct pt_regs *regs)
 	if (regs && kexec_should_crash(current))
 		crash_kexec(regs);
 
-	if (ret != NOTIFY_STOP)
-		make_task_dead(SIGSEGV);
+	make_task_dead(SIGSEGV);
 }
 
 extern struct exception_table_entry __start___dbe_table[];
-- 
2.1.0