Messages in this thread | | | From | Sedat Dilek <> | Date | Thu, 11 Jan 2024 06:58:46 +0100 | Subject | Re: [PATCH] keys, dns: Fix size check of V1 server-list header |
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On Wed, Jan 10, 2024 at 10:12 PM David Howells <dhowells@redhat.com> 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")
[ CC stable@vger.kernel.org ]
Your (follow-up) patch is now upstream.
https://git.kernel.org/linus/acc657692aed438e9931438f8c923b2b107aebf9
This misses CC: Stable Tag as suggested by Linus.
Looks like linux-6.1.y and linux-6.6.y needs it, too.
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.11&id=da89365158f6f656b28bcdbcbbe9eaf97c63c474 https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.1.72&id=079eefaecfd7bbb8fcc30eccb0dfdf50c91f1805
BG, -Sedat-
> Reported-by: Pengfei Xu <pengfei.xu@intel.com> > Link: https://lore.kernel.org/r/ZZ4fyY4r3rqgZL+4@xpf.sh.intel.com/ > Signed-off-by: David Howells <dhowells@redhat.com> > cc: Edward Adam Davis <eadavis@qq.com> > cc: Linus Torvalds <torvalds@linux-foundation.org> > cc: Simon Horman <horms@kernel.org> > Cc: Jarkko Sakkinen <jarkko@kernel.org> > Cc: Jeffrey E Altman <jaltman@auristor.com> > Cc: Wang Lei <wang840925@gmail.com> > Cc: Jeff Layton <jlayton@redhat.com> > Cc: Steve French <sfrench@us.ibm.com> > Cc: Marc Dionne <marc.dionne@auristor.com> > Cc: "David S. Miller" <davem@davemloft.net> > Cc: Eric Dumazet <edumazet@google.com> > Cc: Jakub Kicinski <kuba@kernel.org> > Cc: Paolo Abeni <pabeni@redhat.com> > --- > net/dns_resolver/dns_key.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/net/dns_resolver/dns_key.c b/net/dns_resolver/dns_key.c > index f18ca02aa95a..c42ddd85ff1f 100644 > --- a/net/dns_resolver/dns_key.c > +++ b/net/dns_resolver/dns_key.c > @@ -104,7 +104,7 @@ dns_resolver_preparse(struct key_preparsed_payload *prep) > const struct dns_server_list_v1_header *v1; > > /* It may be a server list. */ > - if (datalen <= sizeof(*v1)) > + if (datalen < sizeof(*v1)) > return -EINVAL; > > v1 = (const struct dns_server_list_v1_header *)data; > >
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