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for-linus-3.12-merge minor 9p fixes and tweaks for 3.12 merge window

Browse source 
The first fixes namespace issues which causes a kernel
 NULL pointer dereference, the second fixes uevent
 handling to work better with udev, and the third
 switches some code to use srlcpy instead of strncpy
 in order to be safer.
 
 All changes have been baking in for-next for at least
 2 weeks.
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Merge tag 'for-linus-3.12-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs

Pull 9p updates from Eric Van Hensbergen:
 "Minor 9p fixes and tweaks for 3.12 merge window

  The first fixes namespace issues which causes a kernel NULL pointer
  dereference, the second fixes uevent handling to work better with
  udev, and the third switches some code to use srlcpy instead of
  strncpy in order to be safer.

  All changes have been baking in for-next for at least 2 weeks"

* tag 'for-linus-3.12-merge' of git://git.kernel.org/pub/scm/linux/kernel/git/ericvh/v9fs:
  fs/9p: avoid accessing utsname after namespace has been torn down
  9p: send uevent after adding/removing mount_tag attribute
  fs: 9p: use strlcpy instead of strncpy
This commit is contained in:
Linus Torvalds 2013-09-11 12:34:13 -07:00
commit 2b76db6a0f
5 changed files with 19 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

5
net/9p/client.c
View file

@ -987,6 +987,7 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
{
int err;
struct p9_client *clnt;
char *client_id;
err = 0;
clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL);
@ -995,6 +996,10 @@ struct p9_client *p9_client_create(const char *dev_name, char *options)
clnt->trans_mod = NULL;
clnt->trans = NULL;
client_id = utsname()->nodename;
memcpy(clnt->name, client_id, strlen(client_id) + 1);
spin_lock_init(&clnt->lock);
INIT_LIST_HEAD(&clnt->fidlist);

5
net/9p/trans_virtio.c
View file

@ -577,6 +577,10 @@ static int p9_virtio_probe(struct virtio_device *vdev)
mutex_lock(&virtio_9p_lock);
list_add_tail(&chan->chan_list, &virtio_chan_list);
mutex_unlock(&virtio_9p_lock);
/* Let udev rules use the new mount_tag attribute. */
kobject_uevent(&(vdev->dev.kobj), KOBJ_CHANGE);
return 0;
out_free_tag:
@ -654,6 +658,7 @@ static void p9_virtio_remove(struct virtio_device *vdev)
list_del(&chan->chan_list);
mutex_unlock(&virtio_9p_lock);
sysfs_remove_file(&(vdev->dev.kobj), &dev_attr_mount_tag.attr);
kobject_uevent(&(vdev->dev.kobj), KOBJ_CHANGE);
kfree(chan->tag);
kfree(chan->vc_wq);
kfree(chan);