eda47481b9
kpatch_process: fix possible double free. ptrace: fix NULL pointer access problem fix patched process crashing when acccess the global var fix probably restore cc symbol link fail when kill patch building uncourteous optimize: Remove unnecessary comparison code Signed-off-by: yezengruan <yezengruan@huawei.com> (cherry picked from commit f3d59711105eb667fa2f920958fcbdbb7068afd2)
31 lines
952 B
Diff
31 lines
952 B
Diff
From 55b659c0b52a7c5f3fc493dd9c19ac76f09d0ccb Mon Sep 17 00:00:00 2001
|
|
From: Bihong Yu <yubihong@huawei.com>
|
|
Date: Sat, 22 Jan 2022 16:15:50 +0800
|
|
Subject: [PATCH] elf: add section adderss for STT_NOTYPE type of symbol
|
|
|
|
Sometimes, the symbol type of the new global static variable in the
|
|
patch may be STT_NOTYPE. We should add the section adderss to st_value
|
|
for this type symbol, otherwise, the calculated adderss for this type
|
|
symbol will be wrong, which may result in the patched process coredump.
|
|
|
|
Signed-off-by: Bihong Yu <yubihong@huawei.com>
|
|
---
|
|
src/kpatch_elf.c | 1 +
|
|
1 file changed, 1 insertion(+)
|
|
|
|
diff --git a/src/kpatch_elf.c b/src/kpatch_elf.c
|
|
index 3ac56d9..5acf370 100644
|
|
--- a/src/kpatch_elf.c
|
|
+++ b/src/kpatch_elf.c
|
|
@@ -789,6 +789,7 @@ symbol_resolve(struct object_file *o,
|
|
break;
|
|
|
|
case STT_NOTYPE: // for Systemtap symbol _.stapsdt.base.kpatch
|
|
+ s->st_value += shdr[s->st_shndx].sh_addr;
|
|
break;
|
|
|
|
default:
|
|
--
|
|
2.27.0
|
|
|