From 7d6b902ea0e02b2a25c480edf471cbaa4ebe6b3c Mon Sep 17 00:00:00 2001
From: Coly Li <colyli@suse.de>
Date: Fri, 27 May 2022 23:28:16 +0800
Subject: [PATCH] bcache: memset on stack variables in bch_btree_check() and
 bch_sectors_dirty_init()
Git-commit: 7d6b902ea0e02b2a25c480edf471cbaa4ebe6b3c
Patch-mainline: v5.19-rc1
References: git-fixes

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