Messages in this thread | | | Date | Wed, 1 May 2024 16:33:59 -0400 | From | "Michael S. Tsirkin" <> | Subject | Re: [syzbot] [net?] [virt?] [kvm?] KASAN: slab-use-after-free Read in vhost_task_fn |
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On Tue, Apr 30, 2024 at 05:31:47PM +0800, Edward Adam Davis wrote: > please test uaf in vhost_task_fn > > #syz test https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git bb7a2467e6be > diff --git a/kernel/vhost_task.c b/kernel/vhost_task.c > index 48c289947b99..8800f5acc007 100644 > --- a/kernel/vhost_task.c > +++ b/kernel/vhost_task.c > @@ -61,8 +61,8 @@ static int vhost_task_fn(void *data) > set_bit(VHOST_TASK_FLAGS_KILLED, &vtsk->flags); > vtsk->handle_sigkill(vtsk->data); > } > - complete(&vtsk->exited); > mutex_unlock(&vtsk->exit_mutex); > + complete(&vtsk->exited); > > do_exit(0); > }
OK so if rebased on latest master by linus then this patch is sufficient. I squashed it in. Edward, thanks a lot for working on this! I added Suggested-by tag if you like me to add your S.O.B too I can do this.
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