Re: [syzbot] possible deadlock in vmci_qp_broker_detach

[Pavel Skripkin]

 On Wed, 30 Jun 2021 14:56:06 -0700
syzbot <syzbot+44e40ac2cfe68e8ce207@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

> Hello,
> 
> syzbot has tested the proposed patch but the reproducer is still
> triggering an issue: INFO: task hung in vmci_ctx_destroy
> 
> INFO: task syz-executor.4:4967 blocked for more than 143 seconds.
>       Tainted: G        W         5.13.0-syzkaller #0
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
> message. task:syz-executor.4  state:D stack:29136 pid: 4967 ppid:
> 8823 flags:0x00004004 Call Trace:

Hmm, I forgot to change old vmci_ctx_put() in
vmci_ctx_enqueue_datagram()...


#syz test
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master


With regards,
Pavel Skripkin