Christoph Hellwig wrote on Fri, Jul 10, 2020:
> p9_fd_open just fgets file descriptors passed in from userspace, but
> doesn't verify that they are valid for read or writing.  This gets
> cought down in the VFS when actually attemping a read or write, but a
> new warning added in linux-next upsets syzcaller.
> Fix this by just verifying the fds early on.
> Reported-by:
> Signed-off-by: Christoph Hellwig <>

Looks good to me, I'll pick it up shortly.


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