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Zheng Wang b070f29a61 bcache: Fix __bch_btree_node_alloc to make the failure behavior consistent

[ Upstream commit 80fca8a10b ]

In some specific situations, the return value of __bch_btree_node_alloc
may be NULL. This may lead to a potential NULL pointer dereference in
caller function like a calling chain :
btree_split->bch_btree_node_alloc->__bch_btree_node_alloc.

Fix it by initializing the return value in __bch_btree_node_alloc.

Fixes: cafe563591 ("bcache: A block layer cache")
Cc: stable@vger.kernel.org
Signed-off-by: Zheng Wang <zyytlz.wz@163.com>
Signed-off-by: Coly Li <colyli@suse.de>
Link: https://lore.kernel.org/r/20230615121223.22502-6-colyli@suse.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2023-08-11 11:53:44 +02:00

alloc.c

bcache: remove 'int n' from parameter list of bch_bucket_alloc_set()

2023-08-11 11:53:44 +02:00

bcache.h

bcache: remove 'int n' from parameter list of bch_bucket_alloc_set()

2023-08-11 11:53:44 +02:00

bset.c

bcache: allocate meta data pages as compound pages

2020-08-21 13:05:25 +02:00

bset.h

bcache: explicity type cast in bset_bkey_last()