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Add two patches to fix vfio device permissions (rhbz 967230)

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This commit is contained in:
Josh Boyer 2013-06-11 15:18:09 -04:00
parent eec175726c
commit c3faf8e858
3 changed files with 82 additions and 0 deletions
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9
kernel.spec
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@ -804,6 +804,10 @@ Patch25040: tuntap-set-SOCK_ZEROCOPY-flag-during-open.patch
Patch25041: x86-mtrr-Fix-original-mtrr-range-get-for-mtrr_cleanup.patch
Patch25042: x86-range-make-add_range-use-blank-slot.patch
#rhbz 967230
Patch25043: vfio-Set-container-device-mode.patch
Patch25044: vfio-fix-crash-on-rmmod.patch
# END OF PATCH DEFINITIONS
%endif
@ -1554,6 +1558,10 @@ ApplyPatch tuntap-set-SOCK_ZEROCOPY-flag-during-open.patch
ApplyPatch x86-mtrr-Fix-original-mtrr-range-get-for-mtrr_cleanup.patch
ApplyPatch x86-range-make-add_range-use-blank-slot.patch
#rhbz 967230
ApplyPatch vfio-Set-container-device-mode.patch
ApplyPatch vfio-fix-crash-on-rmmod.patch
# END OF PATCH APPLICATIONS
%endif
@ -2382,6 +2390,7 @@ fi
%changelog
* Tue Jun 11 2013 Josh Boyer <jwboyer@redhat.com>
- Add two patches to fix vfio device permissions (rhbz 967230)
- Add patches to fix MTRR issues in 3.9.5 (rhbz 973185)
- Add two patches to fix issues with vhost_net and macvlan (rhbz 954181)
- CVE-2013-2164 information leak in cdrom driver (rhbz 973100 973109)

41
vfio-Set-container-device-mode.patch Normal file
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@ -0,0 +1,41 @@
From 664e9386bd05dbdfecfb28d6cf2fde983aabc65c Mon Sep 17 00:00:00 2001
From: Alex Williamson <alex.williamson@redhat.com>
Date: Tue, 30 Apr 2013 15:42:28 -0600
Subject: [PATCH] vfio: Set container device mode
Minor 0 is the VFIO container device (/dev/vfio/vfio). On it's own
the container does not provide a user with any privileged access. It
only supports API version check and extension check ioctls. Only by
attaching a VFIO group to the container does it gain any access. Set
the mode of the container to allow access.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
---
drivers/vfio/vfio.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index ac7423b..acb7121 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -27,6 +27,7 @@
#include <linux/rwsem.h>
#include <linux/sched.h>
#include <linux/slab.h>
+#include <linux/stat.h>
#include <linux/string.h>
#include <linux/uaccess.h>
#include <linux/vfio.h>
@@ -1359,6 +1360,9 @@ static const struct file_operations vfio_device_fops = {
*/
static char *vfio_devnode(struct device *dev, umode_t *mode)
{
+ if (MINOR(dev->devt) == 0)
+ *mode = S_IRUGO | S_IWUGO;
+
return kasprintf(GFP_KERNEL, "vfio/%s", dev_name(dev));
}
--
1.8.1.4

32
vfio-fix-crash-on-rmmod.patch Normal file
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@ -0,0 +1,32 @@
From 9a6aa279d3d17af73a029fa40654e92f4e75e8bb Mon Sep 17 00:00:00 2001
From: Alexey Kardashevskiy <aik@ozlabs.ru>
Date: Wed, 5 Jun 2013 08:54:16 -0600
Subject: [PATCH] vfio: fix crash on rmmod
devtmpfs_delete_node() calls devnode() callback with mode==NULL but
vfio still tries to write there.
The patch fixes this.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
---
drivers/vfio/vfio.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/vfio/vfio.c b/drivers/vfio/vfio.c
index acb7121..6d78736 100644
--- a/drivers/vfio/vfio.c
+++ b/drivers/vfio/vfio.c
@@ -1360,7 +1360,7 @@ static const struct file_operations vfio_device_fops = {
*/
static char *vfio_devnode(struct device *dev, umode_t *mode)
{
- if (MINOR(dev->devt) == 0)
+ if (mode && (MINOR(dev->devt) == 0))
*mode = S_IRUGO | S_IWUGO;
return kasprintf(GFP_KERNEL, "vfio/%s", dev_name(dev));
--
1.8.1.4