Commit-ID: 69042bf2001b44e81cd86ab11a4637b9d9a14c5a Gitweb: http://git.kernel.org/tip/69042bf2001b44e81cd86ab11a4637b9d9a14c5a Author: Jiri Slaby <jslaby@xxxxxxx> AuthorDate: Mon, 5 Dec 2016 11:55:51 +0100 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Tue, 6 Dec 2016 09:20:59 +0100 objtool: Fix bytes check of lea's rex_prefix For the "lea %(rsp), %rbp" case, we check if there is a rex_prefix. But we check 'bytes' which is insn_byte_t[4] in rex_prefix (insn_field structure). Therefore, the check is always true. Instead, check 'nbytes' which is the right one. Signed-off-by: Jiri Slaby <jslaby@xxxxxxx> Acked-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx> Cc: Andy Lutomirski <luto@xxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Brian Gerst <brgerst@xxxxxxxxx> Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx> Cc: H. Peter Anvin <hpa@xxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/20161205105551.25917-1-jslaby@xxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- tools/objtool/arch/x86/decode.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/objtool/arch/x86/decode.c b/tools/objtool/arch/x86/decode.c index b63a31b..5e0dea2 100644 --- a/tools/objtool/arch/x86/decode.c +++ b/tools/objtool/arch/x86/decode.c @@ -99,7 +99,7 @@ int arch_decode_instruction(struct elf *elf, struct section *sec, break; case 0x8d: - if (insn.rex_prefix.bytes && + if (insn.rex_prefix.nbytes && insn.rex_prefix.bytes[0] == 0x48 && insn.modrm.nbytes && insn.modrm.bytes[0] == 0x2c && insn.sib.nbytes && insn.sib.bytes[0] == 0x24) -- To unsubscribe from this list: send the line "unsubscribe linux-tip-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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