Re: [PATCH v4.14-stable 0/2] Fixes to commit fdfc5c8594c2 (tcp: remove empty skb from write queue in error cases)

Hello Greg & Sasha,

On Sat, Sep 14, 2019 at 12:20 AM Christoph Paasch cpaasch@apple.com wrote:

The above referenced commit has problems on older non-rbTree kernels.

AFAICS, the commit has only been backported to 4.14 up to now, but the commit that fdfc5c8594c2 is fixing (namely ce5ec440994b ("tcp: ensure epoll edge trigger wakeup when write queue is empty"), is in v4.2.

Christoph Paasch (2): tcp: Reset send_head when removing skb from write-queue tcp: Don't dequeue SYN/FIN-segments from write-queue

I'm checking in on these two patches for the 4.14 stable-queue. Especially the panic fixed by patch 2 is pretty easy to trigger :-/

Thanks, Christoph