Re: [Qemu-devel] [PATCH for-2.10?] block: Do not unref bs->file on error in BD's open

[Kevin Wolf]

Am 13.04.2017 um 17:43 hat Max Reitz geschrieben:
> The block layer takes care of removing the bs->file child if the block
> driver's bdrv_open()/bdrv_file_open() implementation fails. The block
> driver therefore does not need to do so, and indeed should not unless it
> sets bs->file to NULL afterwards -- because if this is not done, the
> bdrv_unref_child() in bdrv_open_inherit() will dereference the freed
> memory block at bs->file afterwards, which is not good.
> 
> We can now decide whether to add a "bs->file = NULL;" after each of the
> offending bdrv_unref_child() invocations, or just drop them altogether.
> The latter is simpler, so let's do that.
> 
> Cc: qemu-stable <address@hidden>
> Signed-off-by: Max Reitz <address@hidden>

Thanks, applied to block-next.

Kevin