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ipath: Restrict use of the write() interface

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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@decadent.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ben Hutchings
2016-05-31 03:33:57 +01:00
committed by Greg Kroah-Hartman
parent 9c946c931b
commit 694dfd0ef0
1 changed files with 5 additions and 0 deletions
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5
drivers/staging/rdma/ipath/ipath_file_ops.c
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@@ -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 *fp, const char __user *data,
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;