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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445# SPDX-License-Identifier: GPL-2.0## Copyright 2024 Canonical Ltd.## Authors:# Kuan-Ying Lee <kuan-ying.lee@canonical.com>#
import gdbfrom linux import constants, mm
def help(): t = """Usage: lx-kasan_mem_to_shadow [Hex memory addr] Example: lx-kasan_mem_to_shadow 0xffff000008eca008\n""" gdb.write("Unrecognized command\n") raise gdb.GdbError(t)
class KasanMemToShadow(gdb.Command): """Translate memory address to kasan shadow address"""
p_ops = None
def __init__(self): if constants.LX_CONFIG_KASAN_GENERIC or constants.LX_CONFIG_KASAN_SW_TAGS: super(KasanMemToShadow, self).__init__("lx-kasan_mem_to_shadow", gdb.COMMAND_SUPPORT)
def invoke(self, args, from_tty): if not constants.LX_CONFIG_KASAN_GENERIC or constants.LX_CONFIG_KASAN_SW_TAGS: raise gdb.GdbError('CONFIG_KASAN_GENERIC or CONFIG_KASAN_SW_TAGS is not set')
argv = gdb.string_to_argv(args) if len(argv) == 1: if self.p_ops is None: self.p_ops = mm.page_ops().ops addr = int(argv[0], 16) shadow_addr = self.kasan_mem_to_shadow(addr) gdb.write('shadow addr: 0x%x\n' % shadow_addr) else: help() def kasan_mem_to_shadow(self, addr): return (addr >> self.p_ops.KASAN_SHADOW_SCALE_SHIFT) + self.p_ops.KASAN_SHADOW_OFFSET
KasanMemToShadow()