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authorArmando Visconti <armando.visconti@st.com>2011-05-19 21:41:22 +0200
committerJiri Kosina <jkosina@suse.cz>2011-05-20 10:25:23 +0200
commit966922f26c7fb5eddbe3c506b66bb5659f57b76f (patch)
tree5b609b162a93583520bbf662c18c8cfd2acf499f
parentfdc6807fcd09416c5537f479e1dcd624118e234c (diff)
HID: fix a crash in hid_report_raw_event() function.
I'm using a Data Modul EasyTouch USB multitouch controller, which is issuing a hid report with a size equals to 0. The rsize value gets set to 536870912 and Linux is crashing in the memset because the value is too big. Signed-off-by: Armando Visconti <armando.visconti@st.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
-rw-r--r--drivers/hid/hid-core.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index 852989fc5757..84df80e3efc1 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1045,6 +1045,9 @@ void hid_report_raw_event(struct hid_device *hid, int type, u8 *data, int size,
rsize = ((report->size - 1) >> 3) + 1;
+ if (rsize > HID_MAX_BUFFER_SIZE)
+ rsize = HID_MAX_BUFFER_SIZE;
+
if (csize < rsize) {
dbg_hid("report %d is too short, (%d < %d)\n", report->id,
csize, rsize);

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