Re: SUNRPC: Checking a kmemdup() call in xdr_netobj_dup()

[J. Bruce Fields]

On Sat, Oct 12, 2019 at 08:20:04PM +0200, Markus Elfring wrote:
> I tried another script for the semantic patch language out.
> This source code analysis approach points out that the implementation
> of the function âxdr_netobj_dupâ contains still an unchecked call
> of the function âkmemdupâ.
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/linux/sunrpc/xdr.h?id=1c0cc5f1ae5ee5a6913704c0d75a6e99604ee30a#n167
> https://elixir.bootlin.com/linux/v5.4-rc2/source/include/linux/sunrpc/xdr.h#L167
> 
> How do you think about to improve it?

On a quick check--I see five xdr_netobj_dup callers, and all of them
check whether dst->data is NULL.

Sounds like a false positive for your tool?

--b.