函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\cred.c Create Date:2022-07-27 10:33:02
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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函数名称：get_task_cred - Get another task's objective credentials*@task: The task to query* Get the objective credentials of a task, pinning them so that they can't go* away

函数原型：const struct cred *get_task_cred(struct task_struct *task)

返回类型：struct cred

参数：

类型参数名称
struct task_struct *task
197  _read_lock() - mark the beginning of an RCU read-side critical section* When synchronize_rcu() is invoked on one CPU while other CPUs* are within RCU read-side critical sections, then the* synchronize_rcu() is guaranteed to block until after all the other
199  循环
200  cred等于__task_cred - Access a task's objective credentials*@task: The task to query* Access the objective credentials of a task. The caller must hold the RCU* readlock.* The result of this function should not be passed directly to get_cred();((task))
201  BUG_ON(!cred)
202  当非get_cred_rcu(cred)循环
204  _read_unlock() - marks the end of an RCU read-side critical section.* In most situations, rcu_read_unlock() is immune from deadlock.* However, in kernels built with CONFIG_RCU_BOOST, rcu_read_unlock()
205  返回:cred
调用者
名称描述
prepare_kernel_credprepare_kernel_cred - Prepare a set of credentials for a kernel service*@daemon: A userspace daemon to be used as a reference* Prepare a set of credentials for a kernel service
__cgroup1_procs_write
rdtgroup_task_write_permission
apparmor_getprocattr