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| author |   Oliver Neukum <oneukum@suse.com> | 2020-04-15 16:03:04 +0200 |
|---|---|---|
| committer |   Johan Hovold <johan@kernel.org> | 2020-04-22 09:10:36 +0200 |
| commit | e9b3c610a05c1cdf8e959a6d89c38807ff758ee6 (patch) | |
| tree | 4c21f669d66d62823de204d71bfd0d127db746dd | |
| parent | Linux 5.7-rc2 (diff) | |
| download | wireguard-linux-e9b3c610a05c1cdf8e959a6d89c38807ff758ee6.tar.xz wireguard-linux-e9b3c610a05c1cdf8e959a6d89c38807ff758ee6.zip | |
USB: serial: garmin_gps: add sanity checking for data length
We must not process packets shorter than a packet ID
Signed-off-by: Oliver Neukum <oneukum@suse.com>
Reported-and-tested-by: syzbot+d29e9263e13ce0b9f4fd@syzkaller.appspotmail.com
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Johan Hovold <johan@kernel.org>
| -rw-r--r-- | drivers/usb/serial/garmin_gps.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/usb/serial/garmin_gps.c b/drivers/usb/serial/garmin_gps.c index ffd984142171..d63072fee099 100644 --- a/drivers/usb/serial/garmin_gps.c +++ b/drivers/usb/serial/garmin_gps.c @@ -1138,8 +1138,8 @@ static void garmin_read_process(struct garmin_data *garmin_data_p, send it directly to the tty port */ if (garmin_data_p->flags & FLAGS_QUEUING) { pkt_add(garmin_data_p, data, data_length); - } else if (bulk_data || - getLayerId(data) == GARMIN_LAYERID_APPL) { + } else if (bulk_data || (data_length >= sizeof(u32) && + getLayerId(data) == GARMIN_LAYERID_APPL)) { spin_lock_irqsave(&garmin_data_p->lock, flags); garmin_data_p->flags |= APP_RESP_SEEN; |