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Re: [Qemu-devel] [PATCH 1/7] block: Remove dead code
From: |
Stefan Hajnoczi |
Subject: |
Re: [Qemu-devel] [PATCH 1/7] block: Remove dead code |
Date: |
Thu, 27 Oct 2011 08:37:12 +0100 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, Oct 26, 2011 at 02:31:16PM +0200, Kevin Wolf wrote:
> @@ -2039,11 +2039,7 @@ const char
> *bdrv_get_encrypted_filename(BlockDriverState *bs)
> void bdrv_get_backing_filename(BlockDriverState *bs,
> char *filename, int filename_size)
> {
> - if (!bs->backing_file) {
> - pstrcpy(filename, filename_size, "");
> - } else {
> - pstrcpy(filename, filename_size, bs->backing_file);
> - }
> + pstrcpy(filename, filename_size, bs->backing_file);
> }
I think this points to another problem:
bs->backing_file[] is never cleared across bdrv_close()/bdrv_open().
If we open an image file that uses a backing file, then close the
BlockDriverState, and then open a file which does not use a backing file
we're left with the old backing file!
Stefan
- [Qemu-devel] [PATCH 0/7] block: Collection of unrelated simple fixes, Kevin Wolf, 2011/10/26
- [Qemu-devel] [PATCH 1/7] block: Remove dead code, Kevin Wolf, 2011/10/26
- [Qemu-devel] [PATCH 2/7] block: Fix bdrv_open use after free, Kevin Wolf, 2011/10/26
- [Qemu-devel] [PATCH 4/7] ide: Fix off-by-one error in array index check, Kevin Wolf, 2011/10/26
- [Qemu-devel] [PATCH 5/7] vmdk: Fix use of uninitialised value, Kevin Wolf, 2011/10/26
- [Qemu-devel] [PATCH 6/7] vmdk: Improve error handling, Kevin Wolf, 2011/10/26
- [Qemu-devel] [PATCH 7/7] vmdk: Fix possible segfaults, Kevin Wolf, 2011/10/26
- [Qemu-devel] [PATCH 3/7] qcow: Fix bdrv_write_compressed error handling, Kevin Wolf, 2011/10/26