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a8e53c151f
Page mappings with full RWX permissions are a security risk.
x86, arm64 has an option to walk the page tables
and dump any bad pages.
(1404d6f13e
("arm64: dump: Add checking for writable and exectuable pages"))
Add a similar implementation for arm.
Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Laura Abbott <labbott@redhat.com>
Reviewed-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Jinbum Park <jinb.park7@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
44 lines
929 B
C
44 lines
929 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* Copyright (C) 2014 ARM Ltd. */
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#ifndef __ASM_PTDUMP_H
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#define __ASM_PTDUMP_H
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#ifdef CONFIG_ARM_PTDUMP_CORE
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#include <linux/mm_types.h>
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#include <linux/seq_file.h>
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struct addr_marker {
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unsigned long start_address;
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char *name;
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};
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struct ptdump_info {
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struct mm_struct *mm;
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const struct addr_marker *markers;
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unsigned long base_addr;
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};
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void ptdump_walk_pgd(struct seq_file *s, struct ptdump_info *info);
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#ifdef CONFIG_ARM_PTDUMP_DEBUGFS
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int ptdump_debugfs_register(struct ptdump_info *info, const char *name);
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#else
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static inline int ptdump_debugfs_register(struct ptdump_info *info,
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const char *name)
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{
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return 0;
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}
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#endif /* CONFIG_ARM_PTDUMP_DEBUGFS */
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void ptdump_check_wx(void);
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#endif /* CONFIG_ARM_PTDUMP_CORE */
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#ifdef CONFIG_DEBUG_WX
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#define debug_checkwx() ptdump_check_wx()
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#else
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#define debug_checkwx() do { } while (0)
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#endif
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#endif /* __ASM_PTDUMP_H */
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