Re: [PATCH bpf-next v9 3/3] bpf, selftest: Add tests for FIONREAD and copied_seq

On Sat, Jan 24, 2026 at 07:32 PM +08, Jiayuan Chen wrote:

This commit adds two new test functions: one to reproduce the bug reported
by syzkaller [1], and another to cover the calculation of copied_seq.

The tests primarily involve installing  and uninstalling sockmap on
sockets, then reading data to verify proper functionality.

Additionally, extend the do_test_sockmap_skb_verdict_fionread() function
to support UDP FIONREAD testing.

[1] https://syzkaller.appspot.com/bug?extid=06dbd397158ec0ea4983

Signed-off-by: Jiayuan Chen <jiayuan.chen@linux.dev>
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Reviewed-by: Jakub Sitnicki <jakub@cloudflare.com>