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authorDavid Herrmann <dh.herrmann@gmail.com>2013-11-26 13:58:18 +0100
committerJiri Kosina <jkosina@suse.cz>2013-11-27 10:53:49 +0100
commit80897aa787ecd58eabb29deab7cbec9249c9b7e6 (patch)
treeaaed88615f8a55457a850e5a3aff5b6e0a8175cc /drivers/hid
parent8a396321e2102d98a0d387c773be13b55d88ae6f (diff)
HID: uhid: fix leak for 64/32 UHID_CREATE
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> Cc: stable@vger.kernel.org Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid')
-rw-r--r--drivers/hid/uhid.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hid/uhid.c b/drivers/hid/uhid.c
index 93b00d76374c..cedc6da93c19 100644
--- a/drivers/hid/uhid.c
+++ b/drivers/hid/uhid.c
@@ -287,7 +287,7 @@ 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;

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