This is a note to let you know that I've just added the patch titled
crypto: user - re-add size check for CRYPTO_MSG_GETALG
to the 4.4-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:
crypto-user-re-add-size-check-for-crypto_msg_getalg.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 055ddaace03580455a7b7dbea8e93d62acee61fc Mon Sep 17 00:00:00 2001
From: Mathias Krause <minipli@xxxxxxxxxxxxxx>
Date: Wed, 22 Jun 2016 20:29:37 +0200
Subject: crypto: user - re-add size check for CRYPTO_MSG_GETALG
From: Mathias Krause <minipli@xxxxxxxxxxxxxx>
commit 055ddaace03580455a7b7dbea8e93d62acee61fc upstream.
Commit 9aa867e46565 ("crypto: user - Add CRYPTO_MSG_DELRNG")
accidentally removed the minimum size check for CRYPTO_MSG_GETALG
netlink messages. This allows userland to send a truncated
CRYPTO_MSG_GETALG message as short as a netlink header only making
crypto_report() operate on uninitialized memory by accessing data
beyond the end of the netlink message.
Fix this be re-adding the minimum required size of CRYPTO_MSG_GETALG
messages to the crypto_msg_min[] array.
Fixes: 9aa867e46565 ("crypto: user - Add CRYPTO_MSG_DELRNG")
Signed-off-by: Mathias Krause <minipli@xxxxxxxxxxxxxx>
Cc: Steffen Klassert <steffen.klassert@xxxxxxxxxxx>
Signed-off-by: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
crypto/crypto_user.c | 1 +
1 file changed, 1 insertion(+)
--- a/crypto/crypto_user.c
+++ b/crypto/crypto_user.c
@@ -455,6 +455,7 @@ static const int crypto_msg_min[CRYPTO_N
[CRYPTO_MSG_NEWALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
[CRYPTO_MSG_DELALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
[CRYPTO_MSG_UPDATEALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
+ [CRYPTO_MSG_GETALG - CRYPTO_MSG_BASE] = MSGSIZE(crypto_user_alg),
[CRYPTO_MSG_DELRNG - CRYPTO_MSG_BASE] = 0,
};
Patches currently in stable-queue which might be from minipli@xxxxxxxxxxxxxx are
queue-4.4/crypto-user-re-add-size-check-for-crypto_msg_getalg.patch
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