diff options
Diffstat (limited to 'drivers/usb/gadget/function')
-rw-r--r-- | drivers/usb/gadget/function/f_mass_storage.c | 1 | ||||
-rw-r--r-- | drivers/usb/gadget/function/f_ncm.c | 81 | ||||
-rw-r--r-- | drivers/usb/gadget/function/f_tcm.c | 7 |
3 files changed, 73 insertions, 16 deletions
diff --git a/drivers/usb/gadget/function/f_mass_storage.c b/drivers/usb/gadget/function/f_mass_storage.c index 331c951d72dc..950c9435beec 100644 --- a/drivers/usb/gadget/function/f_mass_storage.c +++ b/drivers/usb/gadget/function/f_mass_storage.c @@ -2039,7 +2039,6 @@ static int do_scsi_command(struct fsg_common *common) case RELEASE: case RESERVE: case SEND_DIAGNOSTIC: - fallthrough; default: unknown_cmnd: diff --git a/drivers/usb/gadget/function/f_ncm.c b/drivers/usb/gadget/function/f_ncm.c index 1d900081b1f0..b4206b0dede5 100644 --- a/drivers/usb/gadget/function/f_ncm.c +++ b/drivers/usb/gadget/function/f_ncm.c @@ -1181,12 +1181,15 @@ static int ncm_unwrap_ntb(struct gether *port, int ndp_index; unsigned dg_len, dg_len2; unsigned ndp_len; + unsigned block_len; struct sk_buff *skb2; int ret = -EINVAL; - unsigned max_size = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize); + unsigned ntb_max = le32_to_cpu(ntb_parameters.dwNtbOutMaxSize); + unsigned frame_max = le16_to_cpu(ecm_desc.wMaxSegmentSize); const struct ndp_parser_opts *opts = ncm->parser_opts; unsigned crc_len = ncm->is_crc ? sizeof(uint32_t) : 0; int dgram_counter; + bool ndp_after_header; /* dwSignature */ if (get_unaligned_le32(tmp) != opts->nth_sign) { @@ -1205,25 +1208,37 @@ static int ncm_unwrap_ntb(struct gether *port, } tmp++; /* skip wSequence */ + block_len = get_ncm(&tmp, opts->block_length); /* (d)wBlockLength */ - if (get_ncm(&tmp, opts->block_length) > max_size) { + if (block_len > ntb_max) { INFO(port->func.config->cdev, "OUT size exceeded\n"); goto err; } ndp_index = get_ncm(&tmp, opts->ndp_index); + ndp_after_header = false; /* Run through all the NDP's in the NTB */ do { - /* NCM 3.2 */ - if (((ndp_index % 4) != 0) && - (ndp_index < opts->nth_size)) { + /* + * NCM 3.2 + * dwNdpIndex + */ + if (((ndp_index % 4) != 0) || + (ndp_index < opts->nth_size) || + (ndp_index > (block_len - + opts->ndp_size))) { INFO(port->func.config->cdev, "Bad index: %#X\n", ndp_index); goto err; } + if (ndp_index == opts->nth_size) + ndp_after_header = true; - /* walk through NDP */ + /* + * walk through NDP + * dwSignature + */ tmp = (void *)(skb->data + ndp_index); if (get_unaligned_le32(tmp) != ncm->ndp_sign) { INFO(port->func.config->cdev, "Wrong NDP SIGN\n"); @@ -1234,14 +1249,15 @@ static int ncm_unwrap_ntb(struct gether *port, ndp_len = get_unaligned_le16(tmp++); /* * NCM 3.3.1 + * wLength * entry is 2 items * item size is 16/32 bits, opts->dgram_item_len * 2 bytes * minimal: struct usb_cdc_ncm_ndpX + normal entry + zero entry * Each entry is a dgram index and a dgram length. */ if ((ndp_len < opts->ndp_size - + 2 * 2 * (opts->dgram_item_len * 2)) - || (ndp_len % opts->ndplen_align != 0)) { + + 2 * 2 * (opts->dgram_item_len * 2)) || + (ndp_len % opts->ndplen_align != 0)) { INFO(port->func.config->cdev, "Bad NDP length: %#X\n", ndp_len); goto err; @@ -1258,8 +1274,21 @@ static int ncm_unwrap_ntb(struct gether *port, do { index = index2; + /* wDatagramIndex[0] */ + if ((index < opts->nth_size) || + (index > block_len - opts->dpe_size)) { + INFO(port->func.config->cdev, + "Bad index: %#X\n", index); + goto err; + } + dg_len = dg_len2; - if (dg_len < 14 + crc_len) { /* ethernet hdr + crc */ + /* + * wDatagramLength[0] + * ethernet hdr + crc or larger than max frame size + */ + if ((dg_len < 14 + crc_len) || + (dg_len > frame_max)) { INFO(port->func.config->cdev, "Bad dgram length: %#X\n", dg_len); goto err; @@ -1283,6 +1312,37 @@ static int ncm_unwrap_ntb(struct gether *port, index2 = get_ncm(&tmp, opts->dgram_item_len); dg_len2 = get_ncm(&tmp, opts->dgram_item_len); + if (index2 == 0 || dg_len2 == 0) + break; + + /* wDatagramIndex[1] */ + if (ndp_after_header) { + if (index2 < opts->nth_size + opts->ndp_size) { + INFO(port->func.config->cdev, + "Bad index: %#X\n", index2); + goto err; + } + } else { + if (index2 < opts->nth_size + opts->dpe_size) { + INFO(port->func.config->cdev, + "Bad index: %#X\n", index2); + goto err; + } + } + if (index2 > block_len - opts->dpe_size) { + INFO(port->func.config->cdev, + "Bad index: %#X\n", index2); + goto err; + } + + /* wDatagramLength[1] */ + if ((dg_len2 < 14 + crc_len) || + (dg_len2 > frame_max)) { + INFO(port->func.config->cdev, + "Bad dgram length: %#X\n", dg_len); + goto err; + } + /* * Copy the data into a new skb. * This ensures the truesize is correct @@ -1299,9 +1359,6 @@ static int ncm_unwrap_ntb(struct gether *port, ndp_len -= 2 * (opts->dgram_item_len * 2); dgram_counter++; - - if (index2 == 0 || dg_len2 == 0) - break; } while (ndp_len > 2 * (opts->dgram_item_len * 2)); } while (ndp_index); diff --git a/drivers/usb/gadget/function/f_tcm.c b/drivers/usb/gadget/function/f_tcm.c index d94b814328c8..184165e27908 100644 --- a/drivers/usb/gadget/function/f_tcm.c +++ b/drivers/usb/gadget/function/f_tcm.c @@ -753,12 +753,13 @@ static int uasp_alloc_stream_res(struct f_uas *fu, struct uas_stream *stream) goto err_sts; return 0; + err_sts: - usb_ep_free_request(fu->ep_status, stream->req_status); - stream->req_status = NULL; -err_out: usb_ep_free_request(fu->ep_out, stream->req_out); stream->req_out = NULL; +err_out: + usb_ep_free_request(fu->ep_in, stream->req_in); + stream->req_in = NULL; out: return -ENOMEM; } |