xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

bpf: skmsg, replace comments with BUILD bug

Browse Source 
Enforce comment on structure layout dependency with a BUILD_BUG_ON
to ensure the condition is maintained.

Suggested-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
John Fastabend
2018-12-20 11:35:31 -08:00
committed by Daniel Borkmann
parent bc1b4f013b
commit 7a69c0f250
2 changed files with 4 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
net/core/filter.c
View File

@@ -7425,6 +7425,9 @@ static u32 sk_msg_convert_ctx_access(enum bpf_access_type type,
int off;
#endif
/* convert ctx uses the fact sg element is first in struct */
BUILD_BUG_ON(offsetof(struct sk_msg, sg) != 0);
switch (si->off) {
case offsetof(struct sk_msg_md, data):
*insn++ = BPF_LDX_MEM(BPF_FIELD_SIZEOF(struct sk_msg, data),