[PATCH v2] cmd: avb: free partition buffer upon verify completion

[Igor Opaniuk]

Hi Gary,

On Mon, May 11, 2020 at 1:11 PM Gary Bisson
<gary.bisson at boundarydevices.com> wrote:
>
> Doing the same as the unittests for libavb [1].
>
> Allows to run 'avb verify' multiple times which can be useful after a
> failure to be able to re-flash the partition and try again.
>
> [1]
> https://android.googlesource.com/platform/external/avb/+/refs/tags/android-9.0.0_r37/test/avb_slot_verify_unittest.cc#156
>
> Signed-off-by: Gary Bisson <gary.bisson at boundarydevices.com>
> ---
> Hi,
>
> Changelog v2:
> - use avb_slot_verity_data_free as suggested by Igor
>
> This was added because of the following scenario:
> 1- fastboot flash boot boot.img
> 2- avb verify
>   -> fails because vbmeta wasn't updated
> 3- fastboot flash vbmeta vbmeta.img
> 4- avb verify
>   -> fails because it can't allocate memory as previous buffer wasn't
> freed
>
> Let me know if you have any questions.
>
> Regards,
> Gary
> ---
>  cmd/avb.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/cmd/avb.c b/cmd/avb.c
> index a4de5c40a2..93d1a31819 100644
> --- a/cmd/avb.c
> +++ b/cmd/avb.c
> @@ -312,6 +312,9 @@ int do_avb_verify_part(cmd_tbl_t *cmdtp, int flag,
>                 printf("Unknown error occurred\n");
>         }
>
> +       if (out_data)
> +               avb_slot_verify_data_free(out_data);
> +
>         return res;
>  }
>
> --
> 2.26.2
>

Reviewed-by: Igor Opaniuk <igor.opaniuk at gmail.com>

Thanks

-- 
Best regards - Freundliche Grüsse - Meilleures salutations

Igor Opaniuk

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