This is a note to let you know that I've just added the patch titled
ipath: Restrict use of the write() interface
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:
ipath-restrict-use-of-the-write-interface.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 ben@xxxxxxxxxxxxxxx Sun Aug 14 16:54:26 2016
From: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Date: Tue, 31 May 2016 03:33:57 +0100
Subject: ipath: Restrict use of the write() interface
To: stable@xxxxxxxxxxxxxxx
Cc: Jason Gunthorpe <jgunthorpe@xxxxxxxxxxxxxxxxxxxx>, Doug Ledford <dledford@xxxxxxxxxx>, linux-rdma@xxxxxxxxxxxxxxx
Message-ID: <20160531023356.GI7555@xxxxxxxxxxxxxxx>
Content-Disposition: inline
From: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Commit e6bd18f57aad ("IB/security: Restrict use of the write()
interface") fixed a security problem with various write()
implementations in the Infiniband subsystem. In older kernel versions
the ipath_write() function has the same problem and needs the same
restriction. (The ipath driver has been completely removed upstream.)
Signed-off-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/staging/rdma/ipath/ipath_file_ops.c | 5 +++++
1 file changed, 5 insertions(+)
--- a/drivers/staging/rdma/ipath/ipath_file_ops.c
+++ b/drivers/staging/rdma/ipath/ipath_file_ops.c
@@ -45,6 +45,8 @@
#include <linux/uio.h>
#include <asm/pgtable.h>
+#include <rdma/ib.h>
+
#include "ipath_kernel.h"
#include "ipath_common.h"
#include "ipath_user_sdma.h"
@@ -2243,6 +2245,9 @@ static ssize_t ipath_write(struct file *
ssize_t ret = 0;
void *dest;
+ if (WARN_ON_ONCE(!ib_safe_file_access(fp)))
+ return -EACCES;
+
if (count < sizeof(cmd.type)) {
ret = -EINVAL;
goto bail;
Patches currently in stable-queue which might be from ben@xxxxxxxxxxxxxxx are
queue-4.4/ipath-restrict-use-of-the-write-interface.patch
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