Fix potential out of bounds access in msc_disk.c

2025-01-09 15:40:21 -05:00
parent 2495563600
commit 19b6baa455
1 changed files with 3 additions and 1 deletions
--- a/examples/device/cdc_msc_freertos/src/msc_disk.c
+++ b/examples/device/cdc_msc_freertos/src/msc_disk.c
@@ -191,6 +191,8 @@ int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buff

  // out of ramdisk
  if ( lba >= DISK_BLOCK_NUM ) return -1;
+  // Check for overflow of offset + bufsize
+  if ( offset + bufsize >= DISK_BLOCK_SIZE ) return -1;
  
  uint8_t const* addr = msc_disk[lba] + offset;
  memcpy(buffer, addr, bufsize);