diff options
| author | Aaron Ma <aaron.ma@canonical.com> | 2018-01-08 05:41:40 +0300 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2018-02-16 15:30:56 +0300 |
| commit | ac75a041048b8c1f7418e27621ca5efda8571043 (patch) | |
| tree | 585001fb5e3034667d927e53392ee2f17108747d /drivers/hid/i2c-hid | |
| parent | bbca80b279745a8bd73a7d23d5b3d1e9d5705600 (diff) | |
| download | linux-ac75a041048b8c1f7418e27621ca5efda8571043.tar.xz | |
HID: i2c-hid: fix size check and type usage
When convert char array with signed int, if the inbuf[x] is negative then
upper bits will be set to 1. Fix this by using u8 instead of char.
ret_size has to be at least 3, hid_input_report use it after minus 2 bytes.
Cc: stable@vger.kernel.org
Signed-off-by: Aaron Ma <aaron.ma@canonical.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Diffstat (limited to 'drivers/hid/i2c-hid')
| -rw-r--r-- | drivers/hid/i2c-hid/i2c-hid.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/drivers/hid/i2c-hid/i2c-hid.c b/drivers/hid/i2c-hid/i2c-hid.c index 7230243b94d3..e6f413a2b1e9 100644 --- a/drivers/hid/i2c-hid/i2c-hid.c +++ b/drivers/hid/i2c-hid/i2c-hid.c @@ -144,10 +144,10 @@ struct i2c_hid { * register of the HID * descriptor. */ unsigned int bufsize; /* i2c buffer size */ - char *inbuf; /* Input buffer */ - char *rawbuf; /* Raw Input buffer */ - char *cmdbuf; /* Command buffer */ - char *argsbuf; /* Command arguments buffer */ + u8 *inbuf; /* Input buffer */ + u8 *rawbuf; /* Raw Input buffer */ + u8 *cmdbuf; /* Command buffer */ + u8 *argsbuf; /* Command arguments buffer */ unsigned long flags; /* device flags */ unsigned long quirks; /* Various quirks */ @@ -455,7 +455,8 @@ out_unlock: static void i2c_hid_get_input(struct i2c_hid *ihid) { - int ret, ret_size; + int ret; + u32 ret_size; int size = le16_to_cpu(ihid->hdesc.wMaxInputLength); if (size > ihid->bufsize) @@ -480,7 +481,7 @@ static void i2c_hid_get_input(struct i2c_hid *ihid) return; } - if (ret_size > size) { + if ((ret_size > size) || (ret_size <= 2)) { dev_err(&ihid->client->dev, "%s: incomplete report (%d/%d)\n", __func__, size, ret_size); return; |