函数逻辑报告

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:security\keys\keyctl.c Create Date:2022-07-27 19:54:17
Last Modify:2020-03-18 07:59:52 Copyright©Brick
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函数名称：Revoke a key.* The key must be grant the caller Write or Setattr permission for this to* work. The key type should give up its quota claim when revoked. The key* and any links to the key will be automatically garbage collected after a

函数原型：long keyctl_revoke_key(key_serial_t id)

返回类型：long

参数：

类型参数名称
key_serial_tid
386  key_ref等于Look up a key ID given us by userspace with a given permissions mask to get* the key it refers to.* Flags can be passed to request that special keyrings be created if referred* to directly, to permit partially constructed keys to be found and to skip
387  如果是错误则
388  ret等于错误
389  如果ret不等于负EACCES则转到:error
391  key_ref等于Look up a key ID given us by userspace with a given permissions mask to get* the key it refers to.* Flags can be passed to request that special keyrings be created if referred* to directly, to permit partially constructed keys to be found and to skip
392  如果是错误则
393  ret等于错误
394  转到:error
398  key等于key_ref_to_ptr(key_ref)
399  ret等于0
400  如果st_bit - Determine whether a bit is set*@nr: bit number to test*@addr: Address to start counting from则ret等于负EPERM
402  否则key_revoke - Revoke a key
405  key_ref_put(key_ref)
406  error :
407  返回:ret
调用者
名称描述
SYSCALL_DEFINE5The key control system call
COMPAT_SYSCALL_DEFINE5The key control system call, 32-bit compatibility version for 64-bit archs