linux-kernel - [tip: x86/core] x86/traps: Convert to insn

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Date:   Mon, 15 Mar 2021 15:47:46 -0000
From:   "tip-bot2 for Borislav Petkov" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Borislav Petkov <bp@...e.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/core] x86/traps: Convert to insn_decode()

The following commit has been merged into the x86/core branch of tip:

Commit-ID:     0be7f42d6fcce111f487283d596594c6da6588b0
Gitweb:        https://git.kernel.org/tip/0be7f42d6fcce111f487283d596594c6da6588b0
Author:        Borislav Petkov <bp@...e.de>
AuthorDate:    Mon, 16 Nov 2020 18:38:45 +01:00
Committer:     Borislav Petkov <bp@...e.de>
CommitterDate: Mon, 15 Mar 2021 12:00:18 +01:00

x86/traps: Convert to insn_decode()

Simplify code, no functional changes.

Signed-off-by: Borislav Petkov <bp@...e.de>
Link: https://lkml.kernel.org/r/20210304174237.31945-15-bp@alien8.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 ac1874a..0da8d2a 100644
--- a/arch/x86/kernel/traps.c
+++ b/arch/x86/kernel/traps.c
@@ -498,14 +498,15 @@ 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)