Hello:
This patch was applied to bpf/bpf.git (master)
by Daniel Borkmann <daniel@xxxxxxxxxxxxx>:
On Wed, 9 Feb 2022 16:55:26 +0100 you wrote:
> If bpf_msg_push_data is called with len 0 (as it happens during
> selftests/bpf/test_sockmap), we do not need to do anything and can
> return early.
>
> Calling bpf_msg_push_data with len 0 previously lead to a wrong ENOMEM
> error: we later called get_order(copy + len); if len was 0, copy + len
> was also often 0 and get_order returned some undefined value (at the
> moment 52). alloc_pages caught that and failed, but then
> bpf_msg_push_data returned ENOMEM. This was wrong because we are most
> probably not out of memory and actually do not need any additional
> memory.
>
> [...]
Here is the summary with links:
- [bpf-next,v2] bpf: Do not try bpf_msg_push_data with len 0
https://git.kernel.org/bpf/bpf/c/4a11678f6838
You are awesome, thank you!
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