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bpf: Switch to offsetofend in BPF_PROG_TEST_RUN 

Switch existing pattern of "offsetof(..., member) + FIELD_SIZEOF(...,
member)' to "offsetofend(..., member)" which does exactly what
we need without all the copy-paste.

Suggested-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Andrii Nakryiko <andriin@fb.com>
Link: https://lore.kernel.org/bpf/20191210191933.105321-1-sdf@google.com
alistair/sensors
Stanislav Fomichev 2019-12-10 11:19:33 -08:00 committed by Daniel Borkmann
parent 09c4708d3c
commit b590cb5f80
1 changed files with 4 additions and 8 deletions
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12
net/bpf/test_run.c
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@ -252,22 +252,19 @@ static int convert___skb_to_skb(struct sk_buff *skb, struct __sk_buff *__skb)
/* priority is allowed */
if (!range_is_zero(__skb, offsetof(struct __sk_buff, priority) +
FIELD_SIZEOF(struct __sk_buff, priority),
if (!range_is_zero(__skb, offsetofend(struct __sk_buff, priority),
offsetof(struct __sk_buff, cb)))
return -EINVAL;
/* cb is allowed */
if (!range_is_zero(__skb, offsetof(struct __sk_buff, cb) +
FIELD_SIZEOF(struct __sk_buff, cb),
if (!range_is_zero(__skb, offsetofend(struct __sk_buff, cb),
offsetof(struct __sk_buff, tstamp)))
return -EINVAL;
/* tstamp is allowed */
if (!range_is_zero(__skb, offsetof(struct __sk_buff, tstamp) +
FIELD_SIZEOF(struct __sk_buff, tstamp),
if (!range_is_zero(__skb, offsetofend(struct __sk_buff, tstamp),
sizeof(struct __sk_buff)))
return -EINVAL;
@ -437,8 +434,7 @@ static int verify_user_bpf_flow_keys(struct bpf_flow_keys *ctx)
/* flags is allowed */
if (!range_is_zero(ctx, offsetof(struct bpf_flow_keys, flags) +
FIELD_SIZEOF(struct bpf_flow_keys, flags),
if (!range_is_zero(ctx, offsetofend(struct bpf_flow_keys, flags),
sizeof(struct bpf_flow_keys)))
return -EINVAL;