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authorJiri Kosina <jkosina@suse.cz>2014-08-21 09:56:47 -0500
committerJiri Kosina <jkosina@suse.cz>2014-08-21 10:38:13 -0500
commit51217e69697fba92a06e07e16f55c9a52d8e8945 (patch)
tree285dfb9a05585d0e7f767c618e1cc8f9e73ce8c6 /drivers
parent29ff66571d38f01c5a5d3af871401b8a65323422 (diff)
downloadlinux-51217e69697fba92a06e07e16f55c9a52d8e8945.tar.bz2
HID: logitech: fix bounds checking on LED report size
The check on report size for REPORT_TYPE_LEDS in logi_dj_ll_raw_request() is wrong; the current check doesn't make any sense -- the report allocated by HID core in hid_hw_raw_request() can be much larger than DJREPORT_SHORT_LENGTH, and currently logi_dj_ll_raw_request() doesn't handle this properly at all. Fix the check by actually trimming down the report size properly if it is too large. Cc: stable@vger.kernel.org Reported-by: Ben Hawkes <hawkes@google.com> Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/hid/hid-logitech-dj.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hid/hid-logitech-dj.c b/drivers/hid/hid-logitech-dj.c
index 486dbde2ba2d..ca0ab5112efd 100644
--- a/drivers/hid/hid-logitech-dj.c
+++ b/drivers/hid/hid-logitech-dj.c
@@ -557,7 +557,7 @@ static int logi_dj_ll_raw_request(struct hid_device *hid,
if (!out_buf)
return -ENOMEM;
- if (count < DJREPORT_SHORT_LENGTH - 2)
+ if (count > DJREPORT_SHORT_LENGTH - 2)
count = DJREPORT_SHORT_LENGTH - 2;
out_buf[0] = REPORT_ID_DJ_SHORT;