Function report

Linux Kernel

v5.5.9

Brick Technologies Co., Ltd

Source Code:kernel\bpf\verifier.c Create Date:2022-07-28 12:58:19
Last Modify:2022-05-19 20:02:10 Copyright©Brick
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Name:check_tp_buffer_access

Proto:static int check_tp_buffer_access(struct bpf_verifier_env *env, const struct bpf_reg_state *reg, int regno, int off, int size)

Type:int

Parameter:

TypeParameterName
struct bpf_verifier_env *env
const struct bpf_reg_state *reg
intregno
intoff
intsize
2769  If off < 0 Then
2770  verbose(env, "R%d invalid tracepoint buffer access: off=%d, size=%d", regno, off, size)
2773  Return -EACCES
2775  If Not Returns true if @a is a known constant || value Then
2778  Format a tnum as a pair of hex numbers (value; mask)
2779  verbose(env, "R%d invalid variable buffer offset: off=%d, var_off=%s", regno, off, tn_buf)
2782  Return -EACCES
2784  If off + size > max_tp_access Then max_tp_access = off + size
2787  Return 0
Caller
NameDescribe
check_mem_accessheck whether memory at (regno + off) is accessible for t = (read | write)* if t==write, value_regno is a register which value is stored into memory* if t==read, value_regno is a register which will receive the value from memory* if t==write &&