From: Sowmini Varadhan <sowmini.varad...@oracle.com>
Date: Tue, 13 Feb 2018 09:05:44 -0800
> Commit ebeeb1ad9b8a ("rds: tcp: use rds_destroy_pending() to synchronize
> netns/module teardown and rds connection/workq management")
> adds an rcu read critical section to __rd_conn_create. The
> memory allocations in that critcal section need to use
> GFP_ATOMIC to avoid sleeping.
>
> This patch was verified with syzkaller reproducer.
>
> Fixes: ebeeb1ad9b8a ("rds: tcp: use rds_destroy_pending() to synchronize
> netns/module teardown and rds connection/workq management")
> Reported-by: syzbot+a0564419941aaae3f...@syzkaller.appspotmail.com
> Signed-off-by: Sowmini Varadhan <sowmini.varad...@oracle.com>
> ---
> v2: do not over-engineer. Keep the gfp arg to ->conn_alloc simple.
Already applied to 'net', no need to send this again.
