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0009-livepatch-patch-hook-don-t-active-patch-when-insmod.patch 1.45 KB
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谢志鹏 提交于 2020-09-12 05:45 . code optimization
From 1bc8c76085839576576fc780336fbd9d7ebd29ef Mon Sep 17 00:00:00 2001
From: Zhipeng Xie <xiezhipeng1@huawei.com>
Date: Tue, 25 Feb 2020 23:40:37 -0500
Subject: [PATCH 09/23] livepatch-patch-hook: don't active patch when insmod
Don't active patch after loading the patch when
DISABLE_AFTER_LOAD is set.
Signed-off-by: Zhipeng Xie <xiezhipeng1@huawei.com>
---
kmod/patch/livepatch-patch-hook.c | 2 ++
kpatch-build/kpatch-build | 4 ++++
2 files changed, 6 insertions(+)
diff --git a/kmod/patch/livepatch-patch-hook.c b/kmod/patch/livepatch-patch-hook.c
index 6ae40de..fb23a94 100644
--- a/kmod/patch/livepatch-patch-hook.c
+++ b/kmod/patch/livepatch-patch-hook.c
@@ -455,6 +455,7 @@ static int __init patch_init(void)
}
#endif
+#if !defined(DISABLE_AFTER_LOAD)
ret = klp_enable_patch(lpatch);
if (ret) {
#ifndef HAVE_SIMPLE_ENABLE
@@ -463,6 +464,7 @@ static int __init patch_init(void)
patch_free_livepatch(lpatch);
return ret;
}
+#endif
return 0;
out:
diff --git a/kpatch-build/kpatch-build b/kpatch-build/kpatch-build
index 17a5e11..894f0ab 100755
--- a/kpatch-build/kpatch-build
+++ b/kpatch-build/kpatch-build
@@ -1053,6 +1053,10 @@ if [[ -n "$KLP_SUPPORT_LOADHOOKS" ]];then
export KCPPFLAGS="-DHAVE_LOADHOOKS $KCPPFLAGS"
fi
+if [[ -n "$DISABLE_AFTER_LOAD" ]];then
+ export KCPPFLAGS="-DDISABLE_AFTER_LOAD $KCPPFLAGS"
+fi
+
echo "Building patch module: $MODNAME.ko"
if [[ -z "$USERSRCDIR" ]] && [[ "$DISTRO" = ubuntu ]]; then
--
2.18.1
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