diff options
| -rw-r--r-- | block/vpc.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/block/vpc.c b/block/vpc.c index 0eef099532..9475efb660 100644 --- a/block/vpc.c +++ b/block/vpc.c @@ -238,6 +238,7 @@ static int vpc_open(BlockDriverState *bs, QDict *options, int flags, ret = bdrv_pread(bs->file->bs, 0, s->footer_buf, HEADER_SIZE); if (ret < 0) { + error_setg(errp, "Unable to read VHD header"); goto fail; } @@ -246,9 +247,11 @@ static int vpc_open(BlockDriverState *bs, QDict *options, int flags, int64_t offset = bdrv_getlength(bs->file->bs); if (offset < 0) { ret = offset; + error_setg(errp, "Invalid file size"); goto fail; } else if (offset < HEADER_SIZE) { ret = -EINVAL; + error_setg(errp, "File too small for a VHD header"); goto fail; } @@ -327,12 +330,14 @@ static int vpc_open(BlockDriverState *bs, QDict *options, int flags, ret = bdrv_pread(bs->file->bs, be64_to_cpu(footer->data_offset), buf, HEADER_SIZE); if (ret < 0) { + error_setg(errp, "Error reading dynamic VHD header"); goto fail; } dyndisk_header = (VHDDynDiskHeader *) buf; if (strncmp(dyndisk_header->magic, "cxsparse", 8)) { + error_setg(errp, "Invalid header magic"); ret = -EINVAL; goto fail; } @@ -348,12 +353,14 @@ static int vpc_open(BlockDriverState *bs, QDict *options, int flags, s->max_table_entries = be32_to_cpu(dyndisk_header->max_table_entries); if ((bs->total_sectors * 512) / s->block_size > 0xffffffffU) { + error_setg(errp, "Too many blocks"); ret = -EINVAL; goto fail; } computed_size = (uint64_t) s->max_table_entries * s->block_size; if (computed_size < bs->total_sectors * 512) { + error_setg(errp, "Page table too small"); ret = -EINVAL; goto fail; } @@ -370,6 +377,7 @@ static int vpc_open(BlockDriverState *bs, QDict *options, int flags, s->pagetable = qemu_try_blockalign(bs->file->bs, pagetable_size); if (s->pagetable == NULL) { + error_setg(errp, "Unable to allocate memory for page table"); ret = -ENOMEM; goto fail; } @@ -379,6 +387,7 @@ static int vpc_open(BlockDriverState *bs, QDict *options, int flags, ret = bdrv_pread(bs->file->bs, s->bat_offset, s->pagetable, pagetable_size); if (ret < 0) { + error_setg(errp, "Error reading pagetable"); goto fail; } |