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block: Check bdrv_getlength() return value in bdrv_append_temp_snapshot()

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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Kevin Wolf 2014-04-04 17:07:19 +02:00
parent b998875dcf
commit f187743acd
1 changed files with 6 additions and 1 deletions
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7
block.c
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@ -1184,7 +1184,12 @@ void bdrv_append_temp_snapshot(BlockDriverState *bs, Error **errp)
instead of opening 'filename' directly */
/* Get the required size from the image */
total_size = bdrv_getlength(bs) & BDRV_SECTOR_MASK;
total_size = bdrv_getlength(bs);
if (total_size < 0) {
error_setg_errno(errp, -total_size, "Could not get image size");
return;
}
total_size &= BDRV_SECTOR_MASK;
/* Create the temporary image */
ret = get_tmp_filename(tmp_filename, sizeof(tmp_filename));