Re: [PATCH 5.10 042/103] net/rds: Avoid potential use after free in rds_send_remove_from_sock

[Greg Kroah-Hartman]

On Mon, Apr 19, 2021 at 11:29:30PM +0200, Pavel Machek wrote:
> Hi!
> 
> > [ Upstream commit 0c85a7e87465f2d4cbc768e245f4f45b2f299b05 ]
> > 
> > In case of rs failure in rds_send_remove_from_sock(), the 'rm' resource
> > is freed and later under spinlock, causing potential use-after-free.
> > Set the free pointer to NULL to avoid undefined behavior.
> 
> This patch is crazy. Take a look at Message-ID:
> <20210419084953.GA28564@amd>. Or just look at the patch :-).

You are correct, everything submitted from this author and domain
recently was done as a "research project" to see if they could mess with
kernel maintainers and slip in pointless changes to the kernel.

Not acceptable at all...

greg k-h