On 17. 01. 19, 20:28, Ben Hutchings wrote:
> I've backported fixes for several security issues involving filesystem
> validation in f2fs.  All of these are already fixed in the later stable
> branches.
> 
> I tested with the reproducers where available.  I also checked for
> regressions with xfstests and didn't find any (but many tests fail with
> or without these changes).

Hi,

I am thinking why in this patch:
> From ec2d979dc3888b6de795344157bb6fe73bbe8e44 Mon Sep 17 00:00:00 2001
> From: Chao Yu <yuch...@huawei.com>
> Date: Wed, 22 Mar 2017 14:45:05 +0800
> Subject: [PATCH 18/36] f2fs: fix race condition in between free nid
>  allocator/initializer
> 
> commit 30a61ddf8117c26ac5b295e1233eaa9629a94ca3 upstream.
> 

you do:

> +       err = 0;
>         list_add_tail(&i->list, &nm_i->free_nid_list);
>         nm_i->fcnt++;
> +err_out:
>         spin_unlock(&nm_i->free_nid_list_lock);
>         radix_tree_preload_end();
> -       return 1;
> +err:
> +       if (err)
> +               kmem_cache_free(free_nid_slab, i);
> +       return !err;

"!err"? Should it be "err < 0 ? err : 1" instead?

thanks,
-- 
js
suse labs


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