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https://github.com/archlinuxarm/PKGBUILDs.git
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61 lines
2.4 KiB
Diff
61 lines
2.4 KiB
Diff
From a877c2568fc96a7a7ba89dd4cf0df20341df2a37 Mon Sep 17 00:00:00 2001
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From: Ethan Tuttle <ethan@ethantuttle.com>
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Date: Tue, 19 Jun 2018 21:31:08 -0700
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Subject: [PATCH 14/14] ARM: mvebu: declare asm symbols as character arrays in
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pmsu.c
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With CONFIG_FORTIFY_SOURCE, memcpy uses the declared size of operands to
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detect buffer overflows. If src or dest is declared as a char, attempts to
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copy more than byte will result in a fortify_panic().
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Address this problem in mvebu_setup_boot_addr_wa() by declaring
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mvebu_boot_wa_start and mvebu_boot_wa_end as character arrays. Also remove
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a couple addressof operators to avoid "arithmetic on pointer to an
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incomplete type" compiler error.
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See commit 54a7d50b9205 ("x86: mark kprobe templates as character arrays,
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not single characters") for a similar fix.
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Fixes "detected buffer overflow in memcpy" error during init on some mvebu
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systems (armada-370-xp, armada-375):
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(fortify_panic) from (mvebu_setup_boot_addr_wa+0xb0/0xb4)
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(mvebu_setup_boot_addr_wa) from (mvebu_v7_cpu_pm_init+0x154/0x204)
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(mvebu_v7_cpu_pm_init) from (do_one_initcall+0x7c/0x1a8)
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(do_one_initcall) from (kernel_init_freeable+0x1bc/0x254)
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(kernel_init_freeable) from (kernel_init+0x8/0x114)
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(kernel_init) from (ret_from_fork+0x14/0x2c)
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Signed-off-by: Ethan Tuttle <ethan@ethantuttle.com>
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Tested-by: Ethan Tuttle <ethan@ethantuttle.com>
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---
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arch/arm/mach-mvebu/pmsu.c | 6 +++---
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1 file changed, 3 insertions(+), 3 deletions(-)
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diff --git a/arch/arm/mach-mvebu/pmsu.c b/arch/arm/mach-mvebu/pmsu.c
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index 27a78c80e5b1..73d5d72dfc3e 100644
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--- a/arch/arm/mach-mvebu/pmsu.c
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+++ b/arch/arm/mach-mvebu/pmsu.c
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@@ -116,8 +116,8 @@ void mvebu_pmsu_set_cpu_boot_addr(int hw_cpu, void *boot_addr)
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PMSU_BOOT_ADDR_REDIRECT_OFFSET(hw_cpu));
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}
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-extern unsigned char mvebu_boot_wa_start;
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-extern unsigned char mvebu_boot_wa_end;
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+extern unsigned char mvebu_boot_wa_start[];
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+extern unsigned char mvebu_boot_wa_end[];
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/*
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* This function sets up the boot address workaround needed for SMP
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@@ -130,7 +130,7 @@ int mvebu_setup_boot_addr_wa(unsigned int crypto_eng_target,
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phys_addr_t resume_addr_reg)
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{
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void __iomem *sram_virt_base;
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- u32 code_len = &mvebu_boot_wa_end - &mvebu_boot_wa_start;
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+ u32 code_len = mvebu_boot_wa_end - mvebu_boot_wa_start;
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mvebu_mbus_del_window(BOOTROM_BASE, BOOTROM_SIZE);
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mvebu_mbus_add_window_by_id(crypto_eng_target, crypto_eng_attribute,
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--
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2.18.0
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