linux-kernel - [PATCH AUTOSEL 5.16 17/30] s390/traps: improve panic message for translation-specification exception

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20220407011140.113856-17-sashal@kernel.org>
Date:   Wed,  6 Apr 2022 21:11:27 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Sasha Levin <sashal@...nel.org>, agordeev@...ux.ibm.com,
        svens@...ux.ibm.com, ebiederm@...ssion.com, iii@...ux.ibm.com,
        linux-s390@...r.kernel.org
Subject: [PATCH AUTOSEL 5.16 17/30] s390/traps: improve panic message for translation-specification exception

From: Heiko Carstens <hca@...ux.ibm.com>

[ Upstream commit f09354ffd84eef3c88efa8ba6df05efe50cfd16a ]

There are many different types of translation exceptions but only a
translation-specification exception leads to a kernel panic since it
indicates corrupted page tables, which must never happen.

Improve the panic message so it is a bit more obvious what this is about.

Signed-off-by: Heiko Carstens <hca@...ux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@...ux.ibm.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/s390/kernel/traps.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c
index 2b780786fc68..ead721965b9f 100644
--- a/arch/s390/kernel/traps.c
+++ b/arch/s390/kernel/traps.c
@@ -142,10 +142,10 @@ static inline void do_fp_trap(struct pt_regs *regs, __u32 fpc)
 	do_trap(regs, SIGFPE, si_code, "floating point exception");
 }
 
-static void translation_exception(struct pt_regs *regs)
+static void translation_specification_exception(struct pt_regs *regs)
 {
 	/* May never happen. */
-	panic("Translation exception");
+	panic("Translation-Specification Exception");
 }
 
 static void illegal_op(struct pt_regs *regs)
@@ -374,7 +374,7 @@ static void (*pgm_check_table[128])(struct pt_regs *regs) = {
 	[0x0f]		= hfp_divide_exception,
 	[0x10]		= do_dat_exception,
 	[0x11]		= do_dat_exception,
-	[0x12]		= translation_exception,
+	[0x12]		= translation_specification_exception,
 	[0x13]		= special_op_exception,
 	[0x14]		= default_trap_handler,
 	[0x15]		= operand_exception,
-- 
2.35.1