Re: [PATCH net] selftests: net: txtimestamp: fix out-of-bounds read in raw UDP checksum

[patchwork-bot+netdevbpf]

Hello:

This patch was applied to netdev/net.git (main)
by Paolo Abeni <pabeni@xxxxxxxxxx>:

On Tue, 27 Oct 2026 09:29:45 -0700 you wrote:
> With -r (SOCK_RAW, IPPROTO_UDP) the test writes only the UDP header and
> payload, and the kernel adds the IP header. get_udp_csum() still expects
> the IP source and destination addresses to directly precede the UDP
> header, and reads 2 * alen bytes before the start of the buffer: 8 bytes
> for IPv4, 32 bytes for IPv6.
> 
> ASan reports a heap-buffer-overflow for both -4 -r and -6 -r. Without
> ASan the read usually goes unnoticed, but it faults when the buffer is
> the first chunk in the heap. That happens on Ubuntu 26.04, where the
> kselftest runner wraps the test in uutils stdbuf, and txtimestamp.sh
> fails with SIGSEGV on every run.
> 
> [...]

Here is the summary with links:
  - [net] selftests: net: txtimestamp: fix out-of-bounds read in raw UDP checksum
    https://git.kernel.org/netdev/net/c/8daacee78b3d

You are awesome, thank you!
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