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| author | Alan Stern <stern@rowland.harvard.edu> | 2012-07-20 00:08:21 +0400 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2012-07-20 13:24:23 +0400 |
| commit | 668160e5a80536251b4931a332dfe34d6ec2aeb7 (patch) | |
| tree | 326dff1f73e54f8f57a49b090a9f0411cd22dfdb /drivers/hid/hid-wiimote-ext.c | |
| parent | 61c901c56905256a4a4d7c2af92d66200a2ee7f2 (diff) | |
| download | linux-668160e5a80536251b4931a332dfe34d6ec2aeb7.tar.xz | |
HID: usbhid: fix use-after-free bug
This patch (as1592) fixes an obscure problem in the usbhid driver.
Under some circumstances, a control or interrupt-OUT URB can be
submitted twice. This will happen if the first submission fails; the
queue pointers aren't updated, so the next time the queue is restarted
the same URB will be submitted again.
The problem is that raw_report gets deallocated during the first
submission. The second submission will then dereference and try to
free an already-freed region of memory. The patch fixes the problem
by setting raw_report to NULL when it is deallocated and checking for
NULL before dereferencing it.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
CC: Oliver Neukum <oliver@neukum.org>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/hid-wiimote-ext.c')
0 files changed, 0 insertions, 0 deletions