linux-kernel - [PATCH] Revert "LoongArch: Remove unnecessary checks for ORC unwinder"

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-next>] [day] [month] [year] [list]

Message-ID: <20260112091531.12735-1-yangtiezhu@loongson.cn>
Date: Mon, 12 Jan 2026 17:15:31 +0800
From: Tiezhu Yang <yangtiezhu@...ngson.cn>
To: Huacai Chen <chenhuacai@...nel.org>
Cc: loongarch@...ts.linux.dev,
	linux-kernel@...r.kernel.org
Subject: [PATCH] Revert "LoongArch: Remove unnecessary checks for ORC unwinder"

This reverts commit 4cd641a79e69270a062777f64a0dd330abb9044a.

The system can not boot normally with the latest kernel 6.19-rc5 under
different configs, commit 4cd641a79e69 ("LoongArch: Remove unnecessary
checks for ORC unwinder") is the first bad commit since 6.19-rc4, just
revert it first before finding the root cause.

Signed-off-by: Tiezhu Yang <yangtiezhu@...ngson.cn>
---
 arch/loongarch/kernel/unwind_orc.c | 16 +++++++++++-----
 1 file changed, 11 insertions(+), 5 deletions(-)

diff --git a/arch/loongarch/kernel/unwind_orc.c b/arch/loongarch/kernel/unwind_orc.c
index 8a6e3429a860..710f82d73797 100644
--- a/arch/loongarch/kernel/unwind_orc.c
+++ b/arch/loongarch/kernel/unwind_orc.c
@@ -352,6 +352,12 @@ static inline unsigned long bt_address(unsigned long ra)
 {
 	extern unsigned long eentry;
 
+	if (__kernel_text_address(ra))
+		return ra;
+
+	if (__module_text_address(ra))
+		return ra;
+
 	if (ra >= eentry && ra < eentry +  EXCCODE_INT_END * VECSIZE) {
 		unsigned long func;
 		unsigned long type = (ra - eentry) / VECSIZE;
@@ -369,13 +375,10 @@ static inline unsigned long bt_address(unsigned long ra)
 			break;
 		}
 
-		ra = func + offset;
+		return func + offset;
 	}
 
-	if (__kernel_text_address(ra))
-		return ra;
-
-	return 0;
+	return ra;
 }
 
 bool unwind_next_frame(struct unwind_state *state)
@@ -498,6 +501,9 @@ bool unwind_next_frame(struct unwind_state *state)
 		goto err;
 	}
 
+	if (!__kernel_text_address(state->pc))
+		goto err;
+
 	return true;
 
 err:
-- 
2.42.0