Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\verifier.c Create Date:2022-07-28 13:00:05
Last Modify:2022-05-19 20:02:10 Copyright©Brick
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Annotation kernel can get tool activityDownload SCCTChinese

Name:signed_add_overflows

Proto:static bool signed_add_overflows(s64 a, s64 b)

Type:bool

Parameter:

TypeParameterName
s64a
s64b
4383  res = a + b
4385  If b < 0 Then Return res > a
4387  Return res < a
Caller
NameDescribe
adjust_ptr_min_max_valsHandles arithmetic on a pointer and a scalar: computes new min/max and var_off.* Caller should also handle BPF_MOV case separately.* If we return -EACCES, caller may want to try again treating pointer as a* scalar
adjust_scalar_min_max_valsWARNING: This function does calculations on 64-bit values, but the actual* execution may occur on 32-bit values. Therefore, things like bitshifts* need extra checks in the 32-bit case.