This is a note to let you know that I've just added the patch titled
IPsec: do not ignore crypto err in ah4 input
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ipsec-do-not-ignore-crypto-err-in-ah4-input.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Nov 9 10:19:57 CET 2017
From: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
Date: Mon, 16 Jan 2017 13:17:55 +0200
Subject: IPsec: do not ignore crypto err in ah4 input
From: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
[ Upstream commit ebd89a2d0675f1325c2be5b7576fd8cb7e8defd0 ]
ah4 input processing uses the asynchronous hash crypto API which
supplies an error code as part of the operation completion but
the error code was being ignored.
Treat a crypto API error indication as a verification failure.
While a crypto API reported error would almost certainly result
in a memcpy of the digest failing anyway and thus the security
risk seems minor, performing a memory compare on what might be
uninitialized memory is wrong.
Signed-off-by: Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx>
Signed-off-by: Steffen Klassert <steffen.klassert@xxxxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/ipv4/ah4.c | 3 +++
1 file changed, 3 insertions(+)
--- a/net/ipv4/ah4.c
+++ b/net/ipv4/ah4.c
@@ -270,6 +270,9 @@ static void ah_input_done(struct crypto_
int ihl = ip_hdrlen(skb);
int ah_hlen = (ah->hdrlen + 2) << 2;
+ if (err)
+ goto out;
+
work_iph = AH_SKB_CB(skb)->tmp;
auth_data = ah_tmp_auth(work_iph, ihl);
icv = ah_tmp_icv(ahp->ahash, auth_data, ahp->icv_trunc_len);
Patches currently in stable-queue which might be from gilad@xxxxxxxxxxxxx are
queue-3.18/ipsec-do-not-ignore-crypto-err-in-ah4-input.patch