Re: [Qemu-devel] [PATCH] vvfat: Fix memory leak

[Liam Merwick <liam.merwick@oracle.com>]

On 14/11/2018 12:55, Kevin Wolf wrote:
> Don't leak 'cluster' in the mapping == NULL case. Found by Coverity
> (CID 1055918).
> 
> Fixes: 8d9401c2791ee2d2805b741b1ee3006041edcd3e
> Signed-off-by: Kevin Wolf <kwolf@redhat.com>

Reviewed-by: Liam Merwick <liam.merwick@oracle.com>

Thanks.

> ---
>   block/vvfat.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/block/vvfat.c b/block/vvfat.c
> index 1de5de1db4..b7b61ea8b7 100644
> --- a/block/vvfat.c
> +++ b/block/vvfat.c
> @@ -2510,7 +2510,7 @@ static int commit_one_file(BDRVVVFATState* s,
>       uint32_t first_cluster = c;
>       mapping_t* mapping = find_mapping_for_cluster(s, c);
>       uint32_t size = filesize_of_direntry(direntry);
> -    char* cluster = g_malloc(s->cluster_size);
> +    char *cluster;
>       uint32_t i;
>       int fd = 0;
>   
> @@ -2528,17 +2528,17 @@ static int commit_one_file(BDRVVVFATState* s,
>       if (fd < 0) {
>           fprintf(stderr, "Could not open %s... (%s, %d)\n", mapping->path,
>                   strerror(errno), errno);
> -        g_free(cluster);
>           return fd;
>       }
>       if (offset > 0) {
>           if (lseek(fd, offset, SEEK_SET) != offset) {
>               qemu_close(fd);
> -            g_free(cluster);
>               return -3;
>           }
>       }
>   
> +    cluster = g_malloc(s->cluster_size);
> +
>       while (offset < size) {
>           uint32_t c1;
>           int rest_size = (size - offset > s->cluster_size ?
>