diff options
Diffstat (limited to 'src/host')
| -rw-r--r-- | src/host/usbh.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/host/usbh.c b/src/host/usbh.c index a9a692455..a2994cde7 100644 --- a/src/host/usbh.c +++ b/src/host/usbh.c @@ -1654,6 +1654,13 @@ static bool _parse_configuration_descriptor(uint8_t dev_addr, tusb_desc_configur // parse each interfaces while( p_desc < desc_end ) { + if ( 0 == tu_desc_len(p_desc) ) { + // A zero length descriptor indicates that the device is off spec (e.g. wrong wTotalLength). + // Parsed interfaces should still be usable + TU_LOG_USBH("Encountered a zero-length descriptor after %u bytes\r\n", (uint32_t)p_desc - (uint32_t)desc_cfg); + break; + } + uint8_t assoc_itf_count = 1; // Class will always starts with Interface Association (if any) and then Interface descriptor |