Re: [PATCH] Initialize local relocator subchunk struct to all zeros

[Darren Kenny]

Hi Ross,

This looks good to me.

On Thursday, 2022-07-14 at 09:41:28 -04, Ross Philipson wrote:
> The way the code is written the tofree variable would never be
> passed to the free_subchunk() function uninitialized. Coverity
> cannot determine this and flags the situation as "Using uninitialized
> value...". The fix is just to initialize the local struct.
>
> Fixes: CID 314016
>
> Signed-off-by: Ross Philipson <ross.philipson@oracle.com>

Reviewed-by: Darren Kenny <darren.kenny@oracle.com>

Thanks,

Darren.

> ---
>  grub-core/lib/relocator.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/grub-core/lib/relocator.c b/grub-core/lib/relocator.c
> index 68ef128..bfcc70d 100644
> --- a/grub-core/lib/relocator.c
> +++ b/grub-core/lib/relocator.c
> @@ -989,7 +989,7 @@ malloc_in_range (struct grub_relocator *rel,
>       if (j != 0 && events[j - 1].pos != events[j].pos)
>         {
>           grub_addr_t alloc_start, alloc_end;
> -         struct grub_relocator_subchunk tofree;
> +         struct grub_relocator_subchunk tofree = {0};
>           struct grub_relocator_subchunk *curschu = &tofree;
>           if (!oom)
>             curschu = &res->subchunks[cural];
> -- 
> 1.8.3.1