[lvc-project] [PATCH] net/9p: fix infinite loop in p9_client_rpc on fatal signal

[Dominique Martinet]

Vasiliy Kovalev wrote on Wed, Apr 15, 2026 at 06:52:37PM +0300:
> The same defect is present in stable kernels back to 5.4. On those
> kernels the infinite loop is broken earlier by a second SIGKILL from
> the parent process (e.g. kill_and_wait() retrying after a timeout),
> resulting in a zombie process and a shutdown delay rather than a
> permanent D-state hang, but the underlying flaw is the same.
> 
> Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

It's unfortunately not that simple, just leaving here will leak things.

There was another patch last month, help is welcome,
please see https://lore.kernel.org/r/ab_b-95Ok9zLQCdn@codewreck.org

(By the way, what's with the rekindled interest on this?...)

-- 
Dominique Martinet | Asmadeus