Re: [PATCH net] net/smc: queue the copied chunk when smc_tx_sendmsg() faults

Hello:

This patch was applied to netdev/net.git (main)
by Jakub Kicinski [off-list ref]:

On Tue, 13 Oct 2026 15:45:01 -0500 you wrote:

From: Bryam Vargas <redacted>

When a send wraps the end of the send buffer, smc_tx_sendmsg() copies
the data in two chunks. If memcpy_from_msg() faults on the second one,
smc_tx_sendmsg() returns send_done, which already counts the first
chunk, but leaves tx_curs_prep and sndbuf_space as they were. send()
reports bytes the peer never receives, and the next send() overwrites
them. Any caller can hit this on its own stream with a buffer whose
tail is unreadable.

[...]

Here is the summary with links:
  - [net] net/smc: queue the copied chunk when smc_tx_sendmsg() faults
    https://git.kernel.org/netdev/net/c/c0703534b223

You are awesome, thank you!
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