From: Ben Hutchings ben@decadent.org.uk
stable inclusion from stable-v5.10.133 commit 9a6471666b7387ba0af70d504fe1602cc3d3e5b2 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=...
--------------------------------
This was done by commit 52fa82c21f64e900a72437269a5cc9e0034b424e upstream, but this backport avoids changing all callers of the old decoder API.
Signed-off-by: Ben Hutchings ben@decadent.org.uk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Lin Yujun linyujun809@huawei.com Reviewed-by: Zhang Jianhua chris.zjh@huawei.com Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com --- arch/x86/include/asm/insn.h | 2 ++ arch/x86/kernel/alternative.c | 2 +- tools/arch/x86/include/asm/insn.h | 2 ++ 3 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/insn.h b/arch/x86/include/asm/insn.h index 546436b3c215..0da37756917a 100644 --- a/arch/x86/include/asm/insn.h +++ b/arch/x86/include/asm/insn.h @@ -105,6 +105,8 @@ enum insn_mode {
extern int insn_decode(struct insn *insn, const void *kaddr, int buf_len, enum insn_mode m);
+#define insn_decode_kernel(_insn, _ptr) insn_decode((_insn), (_ptr), MAX_INSN_SIZE, INSN_MODE_KERN) + /* Attribute will be determined after getting ModRM (for opcode groups) */ static inline void insn_get_attribute(struct insn *insn) { diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c index 2bc76137c4e7..198dfe0b8326 100644 --- a/arch/x86/kernel/alternative.c +++ b/arch/x86/kernel/alternative.c @@ -1290,7 +1290,7 @@ static void text_poke_loc_init(struct text_poke_loc *tp, void *addr, if (!emulate) emulate = opcode;
- ret = insn_decode(&insn, emulate, MAX_INSN_SIZE, INSN_MODE_KERN); + ret = insn_decode_kernel(&insn, emulate);
BUG_ON(ret < 0); BUG_ON(len != insn.length); diff --git a/tools/arch/x86/include/asm/insn.h b/tools/arch/x86/include/asm/insn.h index 621ab64a6d27..636ec02793a7 100644 --- a/tools/arch/x86/include/asm/insn.h +++ b/tools/arch/x86/include/asm/insn.h @@ -105,6 +105,8 @@ enum insn_mode {
extern int insn_decode(struct insn *insn, const void *kaddr, int buf_len, enum insn_mode m);
+#define insn_decode_kernel(_insn, _ptr) insn_decode((_insn), (_ptr), MAX_INSN_SIZE, INSN_MODE_KERN) + /* Attribute will be determined after getting ModRM (for opcode groups) */ static inline void insn_get_attribute(struct insn *insn) {