x86/ftrace: Use alternative RET encoding
stable inclusion from stable-v5.10.133 commit 00b136bb6254e0abf6aaafe62c4da5f6c4fea4cb category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5PTAS CVE: CVE-2022-29900,CVE-2022-23816,CVE-2022-29901 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=00b136bb6254e0abf6aaafe62c4da5f6c4fea4cb -------------------------------- commit 1f001e9d upstream. Use the return thunk in ftrace trampolines, if needed. Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: NBorislav Petkov <bp@suse.de> Reviewed-by: NJosh Poimboeuf <jpoimboe@kernel.org> Signed-off-by: NBorislav Petkov <bp@suse.de> [cascardo: still copy return from ftrace_stub] [cascardo: use memcpy(text_gen_insn) as there is no __text_gen_insn] Signed-off-by: NThadeu Lima de Souza Cascardo <cascardo@canonical.com> Signed-off-by: NBen Hutchings <ben@decadent.org.uk> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: NLin Yujun <linyujun809@huawei.com> Reviewed-by: NZhang Jianhua <chris.zjh@huawei.com> Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Showing
想要评论请 注册 或 登录