mirror of
https://github.com/torvalds/linux.git
synced 2026-09-21 12:20:02 +02:00
d9d7125e44
Previously I added a FIONREAD test for sockmap, but it can occasionally
fail in CI [1].
The test sends 10 bytes in two segments (2 + 8). For UDP, FIONREAD only
reports the length of the first datagram, not the total queued data.
The original code used recv_timeout() expecting all 10 bytes, but under
high system load, the second datagram may not yet be processed by the
protocol stack, so recv would only return the first 2-byte datagram,
causing a size mismatch failure.
Fix this by receiving exactly the expected bytes (matching FIONREAD) in
the first recv. The remaining datagram is then consumed in a second recv
block, which is only reachable for UDP since TCP's expected already
equals sizeof(buf).
Test:
./test_progs -a sockmap_basic
410/1 sockmap_basic/sockmap create_update_free:OK
...
Summary: 1/35 PASSED, 0 SKIPPED, 0 FAILED
[1] https://github.com/kernel-patches/bpf/actions/runs/22919385910/job/66515395423
Cc: Jiayuan Chen <jiayuan.chen@linux.dev>
Fixes:
|
||
|---|---|---|
| .. | ||
| crypto/chacha20-s390 | ||
| cxl | ||
| fault-injection | ||
| ktest | ||
| kunit | ||
| memblock | ||
| nvdimm | ||
| radix-tree | ||
| rbtree | ||
| scatterlist | ||
| selftests | ||
| shared | ||
| vma | ||
| vsock | ||