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91cb2c8b07
Commit519ea6f1c8("arm64: Fix kernel address detection of __is_lm_address()") fixed the incorrect validation of addresses below PAGE_OFFSET. However, it no longer allowed tagged addresses to be passed to virt_addr_valid(). Fix this by explicitly resetting the pointer tag prior to invoking __is_lm_address(). This is consistent with the __lm_to_phys() macro. Fixes:519ea6f1c8("arm64: Fix kernel address detection of __is_lm_address()") Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Cc: <stable@vger.kernel.org> # 5.4.x Cc: Will Deacon <will@kernel.org> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Link: https://lore.kernel.org/r/20210201190634.22942-2-catalin.marinas@arm.com
32 lines
786 B
C
32 lines
786 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/bug.h>
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#include <linux/export.h>
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#include <linux/types.h>
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#include <linux/mmdebug.h>
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#include <linux/mm.h>
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#include <asm/memory.h>
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phys_addr_t __virt_to_phys(unsigned long x)
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{
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WARN(!__is_lm_address(__tag_reset(x)),
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"virt_to_phys used for non-linear address: %pK (%pS)\n",
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(void *)x,
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(void *)x);
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return __virt_to_phys_nodebug(x);
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}
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EXPORT_SYMBOL(__virt_to_phys);
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phys_addr_t __phys_addr_symbol(unsigned long x)
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{
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/*
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* This is bounds checking against the kernel image only.
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* __pa_symbol should only be used on kernel symbol addresses.
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*/
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VIRTUAL_BUG_ON(x < (unsigned long) KERNEL_START ||
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x > (unsigned long) KERNEL_END);
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return __pa_symbol_nodebug(x);
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}
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EXPORT_SYMBOL(__phys_addr_symbol);
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