函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\usercopy.c Create Date:2022-07-27 18:11:04
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：Is this address range in the kernel text area?

函数原型：static inline void check_kernel_text_object(const unsigned long ptr, unsigned long n, bool to_user)

返回类型：void

参数：

类型参数名称
const unsigned longptr
unsigned longn
boolto_user
120  textlow等于Usage guidelines:* _text, _data: architecture specific, don't use them in arch-independent code* [_stext, _etext]: contains .text.* sections, may also contain .rodata.** and/or .init.* sections* [_sdata, _edata]: contains
121  texthigh等于Usage guidelines:* _text, _data: architecture specific, don't use them in arch-independent code* [_stext, _etext]: contains .text.* sections, may also contain .rodata.** and/or .init.* sections* [_sdata, _edata]: contains
124  如果Returns true if any portion of [ptr,ptr+n) over laps with [low,high). 则usercopy_abort("kernel text", NULL, to_user, ptr - textlow, n)
135  textlow_linear等于lm_alias(textlow)
137  如果textlow_linear恒等于textlow则返回
141  texthigh_linear等于lm_alias(texthigh)
142  如果Returns true if any portion of [ptr,ptr+n) over laps with [low,high). 则usercopy_abort("linear kernel text", NULL, to_user, ptr - textlow_linear, n)
调用者
名称描述
__check_object_sizeValidates that the given object is:* - not bogus address* - fully contained by stack (or stack frame, when available)* - fully within SLAB object (or object whitelist area, when available)* - not in kernel text