Re: [PATCH 1/1] bcache: memset on stack variables in bch_btree_check() and bch_sectors_dirty_init()

[Greg KH <gregkh@linuxfoundation.org>]

On Tue, Jun 28, 2022 at 04:49:33PM +0800, Coly Li wrote:
> The local variables check_state (in bch_btree_check()) and state (in
> bch_sectors_dirty_init()) should be fully filled by 0, because before
> allocating them on stack, they were dynamically allocated by kzalloc().
> 
> Signed-off-by: Coly Li <colyli@suse.de>
> Link: https://lore.kernel.org/r/20220527152818.27545-2-colyli@suse.de
> Signed-off-by: Jens Axboe <axboe@kernel.dk>
> ---
>  drivers/md/bcache/btree.c     | 1 +
>  drivers/md/bcache/writeback.c | 1 +
>  2 files changed, 2 insertions(+)
> 
> diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c
> index 2362bb8ef6d1..e136d6edc1ed 100644
> --- a/drivers/md/bcache/btree.c
> +++ b/drivers/md/bcache/btree.c
> @@ -2017,6 +2017,7 @@ int bch_btree_check(struct cache_set *c)
>  	if (c->root->level == 0)
>  		return 0;
>  
> +	memset(&check_state, 0, sizeof(struct btree_check_state));
>  	check_state.c = c;
>  	check_state.total_threads = bch_btree_chkthread_nr();
>  	check_state.key_idx = 0;
> diff --git a/drivers/md/bcache/writeback.c b/drivers/md/bcache/writeback.c
> index 75b71199800d..d138a2d73240 100644
> --- a/drivers/md/bcache/writeback.c
> +++ b/drivers/md/bcache/writeback.c
> @@ -950,6 +950,7 @@ void bch_sectors_dirty_init(struct bcache_device *d)
>  		return;
>  	}
>  
> +	memset(&state, 0, sizeof(struct bch_dirty_init_state));
>  	state.c = c;
>  	state.d = d;
>  	state.total_threads = bch_btre_dirty_init_thread_nr();
> -- 
> 2.35.3
> 

What is the git commit id of this patch in Linus's tree?

thanks,

greg k-h