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Re: [Qemu-devel] [PATCH] migration: don't use uninitialized variables
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH] migration: don't use uninitialized variables |
Date: |
Fri, 19 Jul 2013 04:57:51 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130625 Thunderbird/17.0.7 |
On 07/18/2013 08:36 PM, Pawit Pornkitprasan wrote:
> The qmp_migrate method uses the 'blk' and 'inc' parameter without
> checking if they're valid or not (they may be uninitialized if
> command is received via QMP)
>
> Signed-off-by: Pawit Pornkitprasan <address@hidden>
> ---
> migration.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
Reviewed-by: Eric Blake <address@hidden>
However, wouldn't it be nice if we improved the qapi generator to
guarantee a sane default value for optional parameters, even when
has_value is false?
>
> diff --git a/migration.c b/migration.c
> index 9f5a423..f3d1ff7 100644
> --- a/migration.c
> +++ b/migration.c
> @@ -385,8 +385,8 @@ void qmp_migrate(const char *uri, bool has_blk, bool blk,
> MigrationParams params;
> const char *p;
>
> - params.blk = blk;
> - params.shared = inc;
> + params.blk = has_blk && blk;
> + params.shared = has_inc && inc;
>
> if (s->state == MIG_STATE_ACTIVE) {
> error_set(errp, QERR_MIGRATION_ACTIVE);
>
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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- [Qemu-devel] [PATCH] migration: don't use uninitialized variables, Pawit Pornkitprasan, 2013/07/19
- Re: [Qemu-devel] [PATCH] migration: don't use uninitialized variables,
Eric Blake <=
- Re: [Qemu-devel] [PATCH] migration: don't use uninitialized variables, Pawit Pornkitprasan, 2013/07/19
- Re: [Qemu-devel] [PATCH] migration: don't use uninitialized variables, Luiz Capitulino, 2013/07/29
- Re: [Qemu-devel] [PATCH] migration: don't use uninitialized variables, Markus Armbruster, 2013/07/29
- Re: [Qemu-devel] [PATCH] migration: don't use uninitialized variables, Anthony Liguori, 2013/07/29
- Re: [Qemu-devel] [PATCH] migration: don't use uninitialized variables, Markus Armbruster, 2013/07/30
- Re: [Qemu-devel] [PATCH] migration: don't use uninitialized variables, Anthony Liguori, 2013/07/30
- Re: [Qemu-devel] [PATCH] migration: don't use uninitialized variables, Markus Armbruster, 2013/07/30
Re: [Qemu-devel] [PATCH] migration: don't use uninitialized variables, Orit Wasserman, 2013/07/22
Re: [Qemu-devel] [PATCH] migration: don't use uninitialized variables, Luiz Capitulino, 2013/07/29