diff options
| author | David Herrmann <dh.herrmann@gmail.com> | 2013-11-26 13:58:18 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-12-04 10:57:15 -0800 |
| commit | 5b80fd00af8b03e0b03ec52aec90485525eb2e73 (patch) | |
| tree | 2895b9bdbfdca88d1d98844c8078a1c509a92fc2 /drivers/hid | |
| parent | 8e43aac1ec86b5955ecf396395f6fd8b4be42157 (diff) | |
HID: uhid: fix leak for 64/32 UHID_CREATE
commit 80897aa787ecd58eabb29deab7cbec9249c9b7e6 upstream.
UHID allows short writes so user-space can omit unused fields. We
automatically set them to 0 in the kernel. However, the 64/32 bit
compat-handler didn't do that in the UHID_CREATE fallback. This will
reveal random kernel heap data (of random size, even) to user-space.
Fixes: befde0226a59 ('HID: uhid: make creating devices work on 64/32 systems')
Reported-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/hid')
| -rw-r--r-- | drivers/hid/uhid.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c index 145a4cb5c872..0bb3bb889b71 100644 --- a/drivers/hid/uhid.c +++ b/drivers/hid/uhid.c @@ -312,7 +312,7 @@ static int uhid_event_from_user(const char __user *buffer, size_t len, */ struct uhid_create_req_compat *compat; - compat = kmalloc(sizeof(*compat), GFP_KERNEL); + compat = kzalloc(sizeof(*compat), GFP_KERNEL); if (!compat) return -ENOMEM; |