[PATCH 02/11] xfsprogs: fix integer overflow in xlog_find_verify_cycle

[Eric Sandeen]

On 12/2/15 5:19 AM, Vivek Trivedi wrote:
> Fix unintentional integer overflow in xlog_find_verify_cycle.
> Reported by coverity.
> 
> Signed-off-by: Vivek Trivedi <t.vivek at samsung.com>

Coverity-Id: 200684
Reviewed-by: Eric Sandeen <sandeen at redhat.com>

> ---
>  libxlog/xfs_log_recover.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/libxlog/xfs_log_recover.c b/libxlog/xfs_log_recover.c
> index ef7cf68..73f4d36 100644
> --- a/libxlog/xfs_log_recover.c
> +++ b/libxlog/xfs_log_recover.c
> @@ -254,7 +254,7 @@ xlog_find_verify_cycle(
>  	 * try a smaller size.  We need to be able to read at least
>  	 * a log sector, or we're out of luck.
>  	 */
> -	bufblks = 1 << ffs(nbblks);
> +	bufblks = (xfs_daddr_t)1 << ffs(nbblks);
>  	while (bufblks > log->l_logBBsize)
>  		bufblks >>= 1;
>  	while (!(bp = xlog_get_bp(log, bufblks))) {
>