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From: Borislav Petkov <bp@alien8.de>
To: Andy Lutomirski <luto@amacapital.net>,
	Masami Hiramatsu <mhiramat@kernel.org>
Cc: X86 ML <x86@kernel.org>, LKML <linux-kernel@vger.kernel.org>
Subject: [RFC PATCH v0 12/19] x86/traps: Convert to insn_decode()
Date: Tue, 24 Nov 2020 11:19:45 +0100	[thread overview]
Message-ID: <20201124101952.7909-13-bp@alien8.de> (raw)
In-Reply-To: <20201124101952.7909-1-bp@alien8.de>

From: Borislav Petkov <bp@suse.de>

Simplify code, no functional changes.

Signed-off-by: Borislav Petkov <bp@suse.de>
---
 arch/x86/kernel/traps.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c
index e1b78829d909..4a06f79aaeeb 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -493,14 +493,15 @@ static enum kernel_gp_hint get_kernel_gp_address(struct pt_regs *regs,
 {
 	u8 insn_buf[MAX_INSN_SIZE];
 	struct insn insn;
+	int ret;
 
 	if (copy_from_kernel_nofault(insn_buf, (void *)regs->ip,
 			MAX_INSN_SIZE))
 		return GP_NO_HINT;
 
-	kernel_insn_init(&insn, insn_buf, MAX_INSN_SIZE);
-	insn_get_modrm(&insn);
-	insn_get_sib(&insn);
+	ret = insn_decode(&insn, insn_buf, MAX_INSN_SIZE, INSN_MODE_KERN);
+	if (ret < 0)
+		return GP_NO_HINT;
 
 	*addr = (unsigned long)insn_get_addr_ref(&insn, regs);
 	if (*addr == -1UL)
-- 
2.21.0


  parent reply	other threads:[~2020-11-24 10:20 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-24 10:19 [RFC PATCH v0 00/19] x86/insn: Add an insn_decode() API Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 01/19] x86/insn: Rename insn_decode() to insn_decode_regs() Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 02/19] x86/insn: Add @buf_len param to insn_init() kernel-doc comment Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 03/19] x86/insn: Add an insn_decode() API Borislav Petkov
2020-11-25 16:53   ` Masami Hiramatsu
2020-11-25 19:25     ` Borislav Petkov
2020-11-26  1:37       ` Masami Hiramatsu
2020-11-26 17:50         ` Borislav Petkov
2020-11-27  5:54           ` Masami Hiramatsu
2020-11-24 10:19 ` [RFC PATCH v0 04/19] x86/insn-eval: Handle return values from the decoder Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 05/19] x86/boot/compressed/sev-es: Convert to insn_decode() Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 06/19] perf/x86/intel/ds: Check insn_get_length() retval Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 07/19] perf/x86/intel/ds: Check return values of insn decoder functions Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 08/19] x86/alternative: Use insn_decode() Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 09/19] x86/mce: Convert to insn_decode() Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 10/19] x86/kprobes: " Borislav Petkov
2020-11-25 17:19   ` Masami Hiramatsu
2020-11-24 10:19 ` [RFC PATCH v0 11/19] x86/sev-es: " Borislav Petkov
2020-11-24 10:19 ` Borislav Petkov [this message]
2020-11-24 10:19 ` [RFC PATCH v0 13/19] x86/uprobes: " Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 14/19] x86/tools/insn_decoder_test: " Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 15/19] tools/objtool: " Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 16/19] x86/tools/insn_sanity: " Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 17/19] tools/perf: " Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 18/19] x86/insn: Remove kernel_insn_init() Borislav Petkov
2020-11-24 10:19 ` [RFC PATCH v0 19/19] x86/insn: Make insn_complete() static Borislav Petkov
2020-11-24 17:46 ` [RFC PATCH v0 00/19] x86/insn: Add an insn_decode() API Borislav Petkov
2020-11-25  8:03   ` Masami Hiramatsu
2020-11-27 17:45   ` Andy Lutomirski
2020-11-27 22:35     ` Borislav Petkov
2020-11-29  8:50     ` Masami Hiramatsu
2020-11-30 13:44       ` Borislav Petkov
2020-11-30 17:21         ` Masami Hiramatsu
2020-12-02 18:04           ` Borislav Petkov

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