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| author | Armando Visconti <armando.visconti@st.com> | 2011-05-19 21:41:22 +0200 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2011-05-20 10:25:23 +0200 |
| commit | 966922f26c7fb5eddbe3c506b66bb5659f57b76f (patch) | |
| tree | 5b609b162a93583520bbf662c18c8cfd2acf499f | |
| parent | fdc6807fcd09416c5537f479e1dcd624118e234c (diff) | |
| download | linux-exynos-966922f26c7fb5eddbe3c506b66bb5659f57b76f.tar.gz linux-exynos-966922f26c7fb5eddbe3c506b66bb5659f57b76f.tar.bz2 linux-exynos-966922f26c7fb5eddbe3c506b66bb5659f57b76f.zip | |
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.c | 3 |
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); |