Merge branch 'refs/heads/master' into fork/jay94ks/styluspen

1 files changed, 8 insertions, 1 deletions

diff --git a/examples/device/cdc_msc/src/msc_disk.c b/examples/device/cdc_msc/src/msc_disk.c
index d2f8628f1..d325d77fa 100644
--- a/examples/device/cdc_msc/src/msc_disk.c
+++ b/examples/device/cdc_msc/src/msc_disk.c
@@ -190,7 +190,14 @@ int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buff
   (void) lun;
 
   // out of ramdisk
-  if ( lba >= DISK_BLOCK_NUM ) return -1;
+  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);