Re: [PATCH net] sctp: avoid BUG_ON on sctp_wait_for_sndbuf

From: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Date: Mon,  6 Feb 2017 18:10:31 -0200

Alexander Popov reported that an application may trigger a BUG_ON in
sctp_wait_for_sndbuf if the socket tx buffer is full, a thread is
waiting on it to queue more data and meanwhile another thread peels off
the association being used by the first thread.

This patch replaces the BUG_ON call with a proper error handling. It
will return -EPIPE to the original sendmsg call, similarly to what would
have been done if the association wasn't found in the first place.

Acked-by: Alexander Popov <redacted>
Signed-off-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
---
Please consider this to -stable. Thanks

Applied and queued up for -stable, thanks a lot.