|
 |
acf3ec |
From 598377606649ee3cdcc1694d975bed27005612ee Mon Sep 17 00:00:00 2001
|
|
|
acf3ec |
From: Lianbo Jiang <lijiang@redhat.com>
|
|
|
acf3ec |
Date: Wed, 16 Nov 2022 20:46:48 +0800
|
|
|
acf3ec |
Subject: [PATCH 22/28] Fix for the invalid linux_banner pointer issue
|
|
|
acf3ec |
|
|
|
acf3ec |
Currently, crash may fail with the following error:
|
|
|
acf3ec |
|
|
|
acf3ec |
# ./crash -s vmlinux vmcore
|
|
|
acf3ec |
WARNING: invalid linux_banner pointer: 65762078756e694c
|
|
|
acf3ec |
crash: vmlinux and vmcore do not match!
|
|
|
acf3ec |
|
|
|
acf3ec |
The reason is that the type of the symbol in the data segment may be
|
|
|
acf3ec |
defined as 'D' or 'd'. The crash only handled the type 'D', but it
|
|
|
acf3ec |
didn't deal with the type 'd'. For example:
|
|
|
acf3ec |
|
|
|
acf3ec |
# nm vmlinux | grep linux_banner
|
|
|
acf3ec |
ffffffff827cfa80 d linux_banner
|
|
|
acf3ec |
|
|
|
acf3ec |
It has been observed that a vmlinux compiled by clang has this type.
|
|
|
acf3ec |
Let's add the type 'd' recognition to solve such issue.
|
|
|
acf3ec |
|
|
|
acf3ec |
Signed-off-by: Lianbo Jiang <lijiang@redhat.com>
|
|
|
acf3ec |
---
|
|
|
acf3ec |
kernel.c | 1 +
|
|
|
acf3ec |
1 file changed, 1 insertion(+)
|
|
|
acf3ec |
|
|
|
acf3ec |
diff --git a/kernel.c b/kernel.c
|
|
|
acf3ec |
index bd0bf8c6cf03..2a1c1c391414 100644
|
|
|
acf3ec |
--- a/kernel.c
|
|
|
acf3ec |
+++ b/kernel.c
|
|
|
acf3ec |
@@ -1060,6 +1060,7 @@ verify_version(void)
|
|
|
acf3ec |
if (!(sp = symbol_search("linux_banner")))
|
|
|
acf3ec |
error(FATAL, "linux_banner symbol does not exist?\n");
|
|
|
acf3ec |
else if ((sp->type == 'R') || (sp->type == 'r') ||
|
|
|
acf3ec |
+ (THIS_KERNEL_VERSION >= LINUX(2,6,11) && (sp->type == 'D' || sp->type == 'd')) ||
|
|
|
acf3ec |
(machine_type("ARM") && sp->type == 'T') ||
|
|
|
acf3ec |
(machine_type("ARM64")))
|
|
|
acf3ec |
linux_banner = symbol_value("linux_banner");
|
|
|
acf3ec |
--
|
|
|
acf3ec |
2.37.1
|
|
|
acf3ec |
|