linux-kernel - [PATCH] arm64: module: PLT allowed even !RANDOM

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Date:   Mon, 23 Oct 2023 15:57:14 +0800
From:   Maria Yu <quic_aiquny@...cinc.com>
To:     <catalin.marinas@....com>, <will@...nel.org>, <arnd@...db.de>
CC:     Maria Yu <quic_aiquny@...cinc.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <kernel@...cinc.com>,
        <linux-arm-msm@...r.kernel.org>
Subject: [PATCH] arm64: module: PLT allowed even !RANDOM_BASE

Module PLT feature can be enabled even when RANDOM_BASE is disabled.
Break BLT entry counts of relocation types will make module plt entry
allocation fail and finally exec format error for even correct and plt
allocation available modules.

Signed-off-by: Maria Yu <quic_aiquny@...cinc.com>
---
 arch/arm64/kernel/module-plts.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/arch/arm64/kernel/module-plts.c b/arch/arm64/kernel/module-plts.c
index bd69a4e7cd60..21a67d52d7a0 100644
--- a/arch/arm64/kernel/module-plts.c
+++ b/arch/arm64/kernel/module-plts.c
@@ -167,9 +167,6 @@ static unsigned int count_plts(Elf64_Sym *syms, Elf64_Rela *rela, int num,
 		switch (ELF64_R_TYPE(rela[i].r_info)) {
 		case R_AARCH64_JUMP26:
 		case R_AARCH64_CALL26:
-			if (!IS_ENABLED(CONFIG_RANDOMIZE_BASE))
-				break;
-
 			/*
 			 * We only have to consider branch targets that resolve
 			 * to symbols that are defined in a different section.

base-commit: 05d3ef8bba77c1b5f98d941d8b2d4aeab8118ef1
-- 
2.17.1