On Wed, Jan 10, 2024 at 09:11:40PM +0000, David Howells wrote:
>
> Fix the size check added to dns_resolver_preparse() for the V1 server-list
> header so that it doesn't give EINVAL if the size supplied is the same as
> the size of the header struct (which should be valid).
>
> This can be tested with:
>
> echo -n -e '\0\0\01\xff\0\0' | keyctl padd dns_resolver desc @p
>
> which will give "add_key: Invalid argument" without this fix.
>
> Fixes: 1997b3cb4217 ("keys, dns: Fix missing size check of V1 server-list header")
> Reported-by: Pengfei Xu <pengfei.xu@xxxxxxxxx>
> Link: https://lore.kernel.org/r/ZZ4fyY4r3rqgZL+4@xxxxxxxxxxxxxxxx/
> Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Reviewed-by: Simon Horman <horms@xxxxxxxxxx>
