Re: [PATCH 1/2] ocfs2: Fix possible memory leak in ocfs2_finish_quota_recovery

[Jan Kara]

On Wed 02-04-25 09:56:27, Murad Masimov wrote:
> If ocfs2_finish_quota_recovery() exits due to an error before passing all
> rc_list elements to ocfs2_recover_local_quota_file() then it can lead to
> a memory leak as rc_list may still contain elements that have to be freed.
> 
> Release all memory allocated by ocfs2_add_recovery_chunk() using
> ocfs2_free_quota_recovery() instead of kfree().
> 
> Found by Linux Verification Center (linuxtesting.org) with Syzkaller.
> 
> Fixes: 2205363dce74 ("ocfs2: Implement quota recovery")
> Signed-off-by: Murad Masimov <m.masimov@xxxxxxxxxxxxxxxxx>

Looks good. Thanks for debugging this! Feel free to add:

Reviewed-by: Jan Kara <jack@xxxxxxx>

								Honza

> ---
>  fs/ocfs2/quota_local.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c
> index 2956d888c131..e60383d6ecc1 100644
> --- a/fs/ocfs2/quota_local.c
> +++ b/fs/ocfs2/quota_local.c
> @@ -678,7 +678,7 @@ int ocfs2_finish_quota_recovery(struct ocfs2_super *osb,
>  	}
>  out:
>  	up_read(&sb->s_umount);
> -	kfree(rec);
> +	ocfs2_free_quota_recovery(rec);
>  	return status;
>  }
> 
> --
> 2.39.2
> 
-- 
Jan Kara <jack@xxxxxxxx>
SUSE Labs, CR