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| author | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-24 17:47:09 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-24 17:47:09 -0700 |
| commit | 83626b01275d0228516b4d97da008328fc37c934 (patch) | |
| tree | 7414f0b4ee877e10e40671df03425e362dd43c43 | |
| parent | abb1cf3cb9532d824c8bda00a111adb106dd457d (diff) | |
| download | linux-3.10-83626b01275d0228516b4d97da008328fc37c934.tar.gz linux-3.10-83626b01275d0228516b4d97da008328fc37c934.tar.bz2 linux-3.10-83626b01275d0228516b4d97da008328fc37c934.zip | |
Revert "[PATCH] usb: drivers/usb/core/devio.c dereferences a userspace pointer"
This reverts commit 786dc1d3d7333f269e17d742886eac2188a2d9cc.
As Al so eloquently points out, the patch is crap. The old code was fine,
the new code was bogus.
It never dereferenced a user pointer, the "->" operator was to an array
member, which gives the _address_ of the member (in user space), not an
actual dereference at all.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | drivers/usb/core/devio.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c index 3f8e06279c9..bcbeaf7101d 100644 --- a/drivers/usb/core/devio.c +++ b/drivers/usb/core/devio.c @@ -1078,9 +1078,7 @@ static int proc_submiturb(struct dev_state *ps, void __user *arg) if (copy_from_user(&uurb, arg, sizeof(uurb))) return -EFAULT; - return proc_do_submiturb(ps, &uurb, - (struct usbdevfs_iso_packet_desc __user *)uurb.iso_frame_desc, - arg); + return proc_do_submiturb(ps, &uurb, (((struct usbdevfs_urb __user *)arg)->iso_frame_desc), arg); } static int proc_unlinkurb(struct dev_state *ps, void __user *arg) @@ -1205,9 +1203,7 @@ static int proc_submiturb_compat(struct dev_state *ps, void __user *arg) if (get_urb32(&uurb,(struct usbdevfs_urb32 *)arg)) return -EFAULT; - return proc_do_submiturb(ps, &uurb, - (struct usbdevfs_iso_packet_desc __user *)uurb.iso_frame_desc, - arg); + return proc_do_submiturb(ps, &uurb, ((struct usbdevfs_urb32 __user *)arg)->iso_frame_desc, arg); } static int processcompl_compat(struct async *as, void __user * __user *arg) |