diff options
Diffstat (limited to 'drivers/usb/atm')
| -rw-r--r-- | drivers/usb/atm/ueagle-atm.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/drivers/usb/atm/ueagle-atm.c b/drivers/usb/atm/ueagle-atm.c index 3e2475c666a..be08e16df09 100644 --- a/drivers/usb/atm/ueagle-atm.c +++ b/drivers/usb/atm/ueagle-atm.c @@ -426,14 +426,14 @@ static void uea_upload_pre_firmware(const struct firmware *fw_entry, void *conte pfw = fw_entry->data; size = fw_entry->size; + if (size < 4) + goto err_fw_corrupted; crc = FW_GET_LONG(pfw); pfw += 4; size -= 4; - if (crc32_be(0, pfw, size) != crc) { - uea_err(usb, "firmware is corrupted\n"); - goto err; - } + if (crc32_be(0, pfw, size) != crc) + goto err_fw_corrupted; /* * Start to upload formware : send reset @@ -446,9 +446,14 @@ static void uea_upload_pre_firmware(const struct firmware *fw_entry, void *conte goto err; } - while (size > 0) { + while (size > 3) { u8 len = FW_GET_BYTE(pfw); u16 add = FW_GET_WORD(pfw + 1); + + size -= len + 3; + if (size < 0) + goto err_fw_corrupted; + ret = uea_send_modem_cmd(usb, add, len, pfw + 3); if (ret < 0) { uea_err(usb, "uploading firmware data failed " @@ -456,9 +461,11 @@ static void uea_upload_pre_firmware(const struct firmware *fw_entry, void *conte goto err; } pfw += len + 3; - size -= len + 3; } + if (size != 0) + goto err_fw_corrupted; + /* * Tell the modem we finish : de-assert reset */ @@ -469,6 +476,11 @@ static void uea_upload_pre_firmware(const struct firmware *fw_entry, void *conte else uea_info(usb, "firmware uploaded\n"); + uea_leaves(usb); + return; + +err_fw_corrupted: + uea_err(usb, "firmware is corrupted\n"); err: uea_leaves(usb); } @@ -522,10 +534,6 @@ static int check_dsp(u8 *dsp, unsigned int len) u32 pageoffset; unsigned int i, j, p, pp; - /* enough space for pagecount? */ - if (len < 1) - return 1; - pagecount = FW_GET_BYTE(dsp); p = 1; |