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block: vhdx - add error check 

This add an error check for an invalid descriptor entry signature,
when flushing the log descriptor entries.

Signed-off-by: Jeff Cody <jcody@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Jeff Cody 2014-08-06 15:54:57 -04:00 committed by Kevin Wolf
parent 3c80ca158c
commit 349592e0b9
1 changed files with 5 additions and 0 deletions
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5
block/vhdx-log.c
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@ -435,6 +435,11 @@ static int vhdx_log_flush_desc(BlockDriverState *bs, VHDXLogDescriptor *desc,
/* write 'count' sectors of sector */
memset(buffer, 0, VHDX_LOG_SECTOR_SIZE);
count = desc->zero_length / VHDX_LOG_SECTOR_SIZE;
} else {
error_report("Invalid VHDX log descriptor entry signature 0x%" PRIx32,
desc->signature);
ret = -EINVAL;
goto exit;
}
file_offset = desc->file_offset;