diff options
| -rw-r--r-- | block/vhdx-log.c | 23 | ||||
| -rw-r--r-- | block/vhdx.c | 9 |
2 files changed, 26 insertions, 6 deletions
diff --git a/block/vhdx-log.c b/block/vhdx-log.c index 01278f3fc9..2e26fd46a5 100644 --- a/block/vhdx-log.c +++ b/block/vhdx-log.c @@ -491,6 +491,7 @@ static int vhdx_log_flush(BlockDriverState *bs, BDRVVHDXState *s, uint32_t cnt, sectors_read; uint64_t new_file_size; void *data = NULL; + int64_t file_length; VHDXLogDescEntries *desc_entries = NULL; VHDXLogEntryHeader hdr_tmp = { 0 }; @@ -510,10 +511,15 @@ static int vhdx_log_flush(BlockDriverState *bs, BDRVVHDXState *s, if (ret < 0) { goto exit; } + file_length = bdrv_getlength(bs->file->bs); + if (file_length < 0) { + ret = file_length; + goto exit; + } /* if the log shows a FlushedFileOffset larger than our current file * size, then that means the file has been truncated / corrupted, and * we must refused to open it / use it */ - if (hdr_tmp.flushed_file_offset > bdrv_getlength(bs->file->bs)) { + if (hdr_tmp.flushed_file_offset > file_length) { ret = -EINVAL; goto exit; } @@ -543,7 +549,7 @@ static int vhdx_log_flush(BlockDriverState *bs, BDRVVHDXState *s, goto exit; } } - if (bdrv_getlength(bs->file->bs) < desc_entries->hdr.last_file_offset) { + if (file_length < desc_entries->hdr.last_file_offset) { new_file_size = desc_entries->hdr.last_file_offset; if (new_file_size % (1024*1024)) { /* round up to nearest 1MB boundary */ @@ -851,6 +857,7 @@ static int vhdx_log_write(BlockDriverState *bs, BDRVVHDXState *s, uint32_t partial_sectors = 0; uint32_t bytes_written = 0; uint64_t file_offset; + int64_t file_length; VHDXHeader *header; VHDXLogEntryHeader new_hdr; VHDXLogDescriptor *new_desc = NULL; @@ -904,6 +911,12 @@ static int vhdx_log_write(BlockDriverState *bs, BDRVVHDXState *s, sectors += partial_sectors; + file_length = bdrv_getlength(bs->file->bs); + if (file_length < 0) { + ret = file_length; + goto exit; + } + /* sectors is now how many sectors the data itself takes, not * including the header and descriptor metadata */ @@ -913,11 +926,11 @@ static int vhdx_log_write(BlockDriverState *bs, BDRVVHDXState *s, .sequence_number = s->log.sequence, .descriptor_count = sectors, .reserved = 0, - .flushed_file_offset = bdrv_getlength(bs->file->bs), - .last_file_offset = bdrv_getlength(bs->file->bs), + .flushed_file_offset = file_length, + .last_file_offset = file_length, + .log_guid = header->log_guid, }; - new_hdr.log_guid = header->log_guid; desc_sectors = vhdx_compute_desc_sectors(new_hdr.descriptor_count); diff --git a/block/vhdx.c b/block/vhdx.c index a9cecd2773..37224b8858 100644 --- a/block/vhdx.c +++ b/block/vhdx.c @@ -1166,7 +1166,14 @@ exit: static int vhdx_allocate_block(BlockDriverState *bs, BDRVVHDXState *s, uint64_t *new_offset) { - *new_offset = bdrv_getlength(bs->file->bs); + int64_t current_len; + + current_len = bdrv_getlength(bs->file->bs); + if (current_len < 0) { + return current_len; + } + + *new_offset = current_len; /* per the spec, the address for a block is in units of 1MB */ *new_offset = ROUND_UP(*new_offset, 1024 * 1024); |