Function report |
Source Code:security\keys\keyctl.c |
Create Date:2022-07-28 18:21:06 |
Last Modify:2020-03-18 07:59:52 | Copyright©Brick |
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Name:Apply a restriction to a given keyring.* The caller must have Setattr permission to change keyring restrictions.* The requested type name may be a NULL pointer to reject all attempts* to link to the keyring. In this case, _restriction must also be NULL.
Proto:long keyctl_restrict_keyring(key_serial_t id, const char __user *_type, const char __user *_restriction)
Type:long
Parameter:
Type | Parameter | Name |
---|---|---|
key_serial_t | id | |
const char __user * | _type | |
const char __user * | _restriction |
1658 | char * restriction = NULL |
1666 | If _type Then |
1667 | If Not _restriction Then Go to error |
1670 | ret = key_get_type_from_user(type, _type, size of type ) |
1675 | If IS_ERR(restriction) Then |
1676 | ret = PTR_ERR(restriction) |
1677 | Go to error |
1679 | Else |
1680 | If _restriction Then Go to error |
1685 | kfree(restriction) |
1686 | error : |
1687 | key_ref_put(key_ref) |
1688 | Return ret |
Name | Describe |
---|---|
SYSCALL_DEFINE5 | The key control system call |
COMPAT_SYSCALL_DEFINE5 | The key control system call, 32-bit compatibility version for 64-bit archs |
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