[PATCH 4.4] ipath: Restrict use of the write() interface

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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>
---
--- 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;

Attachment: signature.asc
Description: Digital signature


[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]