Re: [PATCH RFC net v3 2/7] net/iucv: fail sendmsg() with EPIPE once sending is shut down

[sashiko-bot@kernel.org]

> From: Bryam Vargas <hexlabsecurity@proton.me>
> 
> sendmsg() tests SEND_SHUTDOWN on entry only, then waits for the peer's
> window without the socket lock. When sending is shut down during that
> wait, by shutdown(SHUT_WR) in another thread or by the peer's quiesce
> over z/VM, the wait does not end and the call does not fail: the writer
> waits out SO_SNDTIMEO, or, when the window opens first, sends its
> record after the socket's SHT and the peer reads data after EOF. With
> the peer's FIN in as well it returns -ECONNRESET for a stream its own
> socket shut down.
> 
> End the wait when sending is shut down and test SEND_SHUTDOWN again
> after it, ahead of the sk_state test, so the call fails with -EPIPE as
> it does on entry.
> 
> Fixes: 0ea920d211e0 ("af_iucv: Return -EAGAIN if iucv msg limit is exceeded")
> Cc: stable@vger.kernel.org # 6.18.x
> Signed-off-by: Bryam Vargas <hexlabsecurity@proton.me>

Sashiko has reviewed this patch and found no issues.

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20261110-b4-disp-2a6b4364-v3-0-35677b68e697@proton.me?part=2