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)
59 lines
1.9 KiB
Diff
59 lines
1.9 KiB
Diff
From abfc33435c25e1515e35768c9a2d684aa72dc780 Mon Sep 17 00:00:00 2001
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From: jiang-dawei15 <jiangdawei15@huawei.com>
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Date: Mon, 28 Feb 2022 15:34:11 +0800
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Subject: [PATCH 1/3] elf/strip: adapt to new gcc version(10.3.1)
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This patch fix the following problems:
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1. new libc so use new naming method,such as: libc.6.so -> libc.so.6;
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2. destroy .rela section sh_flags INFO property;
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Signed-off-by: Bihong Yu <yubihong@huawei.com>
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---
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src/kpatch_elf.c | 9 +++------
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src/kpatch_strip.c | 5 +++--
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2 files changed, 6 insertions(+), 8 deletions(-)
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diff --git a/src/kpatch_elf.c b/src/kpatch_elf.c
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index 5acf370..260209a 100644
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--- a/src/kpatch_elf.c
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+++ b/src/kpatch_elf.c
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@@ -180,16 +180,13 @@ static int
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elf_object_is_interp_exception(struct object_file *o)
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{
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/* libc */
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- if (!strncmp(o->name, "libc", 4) &&
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- !strncmp(o->name + strlen(o->name) - 3, ".so", 3))
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+ if (!strncmp(o->name, "libc.", 5))
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return 1;
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/* libpthread */
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- if (!strncmp(o->name, "libpthread", 10) &&
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- !strncmp(o->name + strlen(o->name) - 3, ".so", 3))
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+ if (!strncmp(o->name, "libpthread.", 11))
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return 1;
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/* libdl */
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- if (!strncmp(o->name, "libdl", 5) &&
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- !strncmp(o->name + strlen(o->name) - 3, ".so", 3))
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+ if (!strncmp(o->name, "libdl.", 6))
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return 1;
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return 0;
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}
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diff --git a/src/kpatch_strip.c b/src/kpatch_strip.c
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index 5717e5a..6420af9 100644
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--- a/src/kpatch_strip.c
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+++ b/src/kpatch_strip.c
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@@ -220,8 +220,9 @@ static int kpatch_strip(Elf *elfin, Elf *elfout)
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} else {
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kpinfo("don't need it\n");
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shout.sh_type = SHT_NOBITS;
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- shout.sh_link = 0;
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- shout.sh_info = 0;
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+ /* destroy the .rela section sh_flags INFO property */
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+ if (!strncmp(scnname, ".rela", 5))
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+ shout.sh_flags = SHF_ALLOC;
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}
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if (!gelf_update_shdr(scnout, &shout)) {
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kperr("Failed to do gelf_update_shdr need");
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--
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2.23.0.windows.1
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