openEuler inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IAD5GG?from=project-issue CVE: NA

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When your development environment does not have the libelf library and you compile an external module with the "M=xxx" compilation option, the external module will not have ORC information and there will be no warning or errors.

If a machine insmod this module and it's process is calling a function in this module, typing kaptch will result in an error indicating that the stack of this process is not trustworthy. The worst thing is that if this module is a necessary and will be used for a long time, kpatch will be difficult to type.

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Revert "kbuild: fix false positive warning/error about missing libelf" This reverts commit ef7cfd00b2caf6edeb7f169682b64be2d0a798cf.

Fixes: ef7cfd00b2ca ("kbuild: fix false positive warning/error about missing libelf") Signed-off-by: Zhao Xuedong zhaoxuedong@meituan.com --- Makefile | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/Makefile b/Makefile index fbaeeb80a69e..82dcf846d07b 100644 --- a/Makefile +++ b/Makefile @@ -1100,6 +1100,11 @@ ifdef CONFIG_STACK_VALIDATION ifeq ($(has_libelf),1) objtool_target := tools/objtool FORCE else + ifdef CONFIG_UNWINDER_ORC + $(error "Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") + else + $(warning "Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel") + endif SKIP_STACK_VALIDATION := 1 export SKIP_STACK_VALIDATION endif @@ -1249,14 +1254,6 @@ uapi-asm-generic:

PHONY += prepare-objtool prepare-resolve_btfids prepare-objtool: $(objtool_target) -ifeq ($(SKIP_STACK_VALIDATION),1) -ifdef CONFIG_UNWINDER_ORC - @echo "error: Cannot generate ORC metadata for CONFIG_UNWINDER_ORC=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 - @false -else - @echo "warning: Cannot use CONFIG_STACK_VALIDATION=y, please install libelf-dev, libelf-devel or elfutils-libelf-devel" >&2 -endif -endif

prepare-resolve_btfids: $(resolve_btfids_target) ifeq ($(ERROR_RESOLVE_BTFIDS),1)