Re: [Qemu-devel] [PATCH v6 04/10] ivshmem: check the value returned by fstat()

[Michael S. Tsirkin]

On Thu, Aug 14, 2014 at 03:29:15PM +0800, zhanghailiang wrote:
> The function fstat() may fail, so check its return value.
> 
> Acked-by: Levente Kurusa <address@hidden>
> Signed-off-by: zhanghailiang <address@hidden>

Reviewed-by: Michael S. Tsirkin <address@hidden>

> ---
>  hw/misc/ivshmem.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c
> index 768e528..2be4b86 100644
> --- a/hw/misc/ivshmem.c
> +++ b/hw/misc/ivshmem.c
> @@ -324,7 +324,11 @@ static int check_shm_size(IVShmemState *s, int fd) {
>  
>      struct stat buf;
>  
> -    fstat(fd, &buf);
> +    if (fstat(fd, &buf) < 0) {
> +        fprintf(stderr, "ivshmem: exiting: fstat on fd %d failed: %s\n",
> +                fd, strerror(errno));
> +        return -1;
> +    }
>  
>      if (s->ivshmem_size > buf.st_size) {
>          fprintf(stderr,
> -- 
> 1.7.12.4
>