函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\rseq.c Create Date:2022-07-27 15:12:39
Last Modify:2022-05-20 08:09:32 Copyright©Brick
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函数名称：rseq_get_rseq_cs

函数原型：static int rseq_get_rseq_cs(struct task_struct *t, struct rseq_cs *rseq_cs)

返回类型：int

参数：

类型参数名称
struct task_struct *t
struct rseq_cs *rseq_cs
117  __user乘urseq_cs
119  __user乘usig
123  如果copy_from_user( & ptr, & ptr64, ptr的长度)则返回:负EFAULT
125  如果非ptr则
126  memset(rseq_cs, 0, rseq_cs的长度)
127  返回:0
129  如果ptr大于等于TASK_SIZE则返回:负EINVAL
131  urseq_cs等于ptr
132  如果copy_from_user(rseq_cs, urseq_cs, rseq_cs的长度)则返回:负EFAULT
135  如果start_ip大于等于TASK_SIZE或start_ip加Offset from start_ip. 大于等于TASK_SIZE或abort_ip大于等于TASK_SIZE或Version of this structure. 大于0则返回:负EINVAL
141  如果start_ip加Offset from start_ip. 小于start_ip则返回:负EINVAL
144  如果abort_ip减start_ip小于Offset from start_ip. 则返回:负EINVAL
147  usig乘__user等于abort_ip减sizeof(u32)
148  ret等于Careful: we have to cast the result to the type of the pointer* for sign reasons(sig, usig)
149  如果ret则返回:ret
152  如果rseq_sig不等于sig则
153  atelimited messages with local ratelimit_state,* no local ratelimit_state used in the !PRINTK case(warning conditions "Possible attack attempt. Unexpected rseq signature 0x%x, expecting 0x%x (pid=%d, addr=%p).\n", sig, rseq_sig, pid, usig)
156  返回:负EINVAL
158  返回:0
调用者
名称描述
rseq_ip_fixup