Patch "IB/uverbs: Fix command checking as part of ib_uverbs_ex_modify_qp()" has been added to the 4.14-stable tree

Patch "IB/uverbs: Fix command checking as part of ib_uverbs_ex_modify_qp()" has been added to the 4.14-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    IB/uverbs: Fix command checking as part of ib_uverbs_ex_modify_qp()

to the 4.14-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:
     ib-uverbs-fix-command-checking-as-part-of-ib_uverbs_ex_modify_qp.patch
and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 05d14e7b0c138cb07ba30e464f47b39434f3fdef Mon Sep 17 00:00:00 2001
From: Moni Shoua <monis@mellanox.com>
Date: Sun, 24 Dec 2017 13:54:57 +0200
Subject: IB/uverbs: Fix command checking as part of ib_uverbs_ex_modify_qp()

From: Moni Shoua <monis@mellanox.com>

commit 05d14e7b0c138cb07ba30e464f47b39434f3fdef upstream.

If the input command length is larger than the kernel supports an error should
be returned in case the unsupported bytes are not cleared, instead of the
other way aroudn. This matches what all other callers of ib_is_udata_cleared
do and will avoid user ABI problems in the future.

Fixes: 189aba99e700 ("IB/uverbs: Extend modify_qp and support packet pacing")
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Moni Shoua <monis@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/infiniband/core/uverbs_cmd.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -2085,8 +2085,8 @@ int ib_uverbs_ex_modify_qp(struct ib_uve
 		return -EOPNOTSUPP;
 
 	if (ucore->inlen > sizeof(cmd)) {
-		if (ib_is_udata_cleared(ucore, sizeof(cmd),
-					ucore->inlen - sizeof(cmd)))
+		if (!ib_is_udata_cleared(ucore, sizeof(cmd),
+					 ucore->inlen - sizeof(cmd)))
 			return -EOPNOTSUPP;
 	}
 


Patches currently in stable-queue which might be from monis@mellanox.com are

queue-4.14/ib-core-verify-that-qp-is-security-enabled-in-create-and-destroy.patch
queue-4.14/ib-uverbs-fix-command-checking-as-part-of-ib_uverbs_ex_modify_qp.patch