diff options
| author | HiFiPhile <[email protected]> | 2025-01-29 15:20:44 +0100 |
|---|---|---|
| committer | HiFiPhile <[email protected]> | 2025-01-29 15:20:44 +0100 |
| commit | 04b9e203107ef5f8b9d44f9b8a302cf6504ae3ae (patch) | |
| tree | a11723be67dde87b8b5f246a91b350ce94dbfffd /examples | |
| parent | cc626f35d212aef86b0aa7275eea016ae69b5de4 (diff) | |
msc_disk: fix overflow check when EP buffer size > 512.
Signed-off-by: HiFiPhile <[email protected]>
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/device/cdc_msc/src/msc_disk.c | 11 | ||||
| -rw-r--r-- | examples/device/cdc_msc_freertos/src/msc_disk.c | 11 |
2 files changed, 18 insertions, 4 deletions
diff --git a/examples/device/cdc_msc/src/msc_disk.c b/examples/device/cdc_msc/src/msc_disk.c index d325d77fa..6fc0760b6 100644 --- a/examples/device/cdc_msc/src/msc_disk.c +++ b/examples/device/cdc_msc/src/msc_disk.c @@ -195,7 +195,7 @@ int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buff } // Check for overflow of offset + bufsize - if ( offset + bufsize > DISK_BLOCK_SIZE ) { + if ( lba * DISK_BLOCK_SIZE + offset + bufsize > DISK_BLOCK_NUM * DISK_BLOCK_SIZE ) { return -1; } @@ -223,7 +223,14 @@ int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t* (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 ( lba * DISK_BLOCK_SIZE + offset + bufsize > DISK_BLOCK_NUM * DISK_BLOCK_SIZE ) { + return -1; + } #ifndef CFG_EXAMPLE_MSC_READONLY uint8_t* addr = msc_disk[lba] + offset; diff --git a/examples/device/cdc_msc_freertos/src/msc_disk.c b/examples/device/cdc_msc_freertos/src/msc_disk.c index d325d77fa..6fc0760b6 100644 --- a/examples/device/cdc_msc_freertos/src/msc_disk.c +++ b/examples/device/cdc_msc_freertos/src/msc_disk.c @@ -195,7 +195,7 @@ int32_t tud_msc_read10_cb(uint8_t lun, uint32_t lba, uint32_t offset, void* buff } // Check for overflow of offset + bufsize - if ( offset + bufsize > DISK_BLOCK_SIZE ) { + if ( lba * DISK_BLOCK_SIZE + offset + bufsize > DISK_BLOCK_NUM * DISK_BLOCK_SIZE ) { return -1; } @@ -223,7 +223,14 @@ int32_t tud_msc_write10_cb(uint8_t lun, uint32_t lba, uint32_t offset, uint8_t* (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 ( lba * DISK_BLOCK_SIZE + offset + bufsize > DISK_BLOCK_NUM * DISK_BLOCK_SIZE ) { + return -1; + } #ifndef CFG_EXAMPLE_MSC_READONLY uint8_t* addr = msc_disk[lba] + offset; |