Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:mm\usercopy.c Create Date:2022-07-28 16:35:48
Last Modify:2020-03-12 14:18:49 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:Validates 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

Proto:void __check_object_size(const void *ptr, unsigned long n, bool to_user)

Type:void

Parameter:

TypeParameterName
const void *ptr
unsigned longn
boolto_user
258  If static_branch_unlikely( & bypass_usercopy_checks) Then Return
262  If Not n Then Return
266  check_bogus_address((constunsignedlong)ptr, n, to_user)
270  Case Checks if a given pointer and length is contained by the current* stack frame (if possible) == NOT_STACK
272  Break
273  Case Checks if a given pointer and length is contained by the current* stack frame (if possible) == GOOD_FRAME
274  Case Checks if a given pointer and length is contained by the current* stack frame (if possible) == GOOD_STACK
280  Return
281  Default
282  usercopy_abort("process stack", NULL, to_user, 0, n)
286  check_heap_object(ptr, n, to_user)
289  Is this address range in the kernel text area?