diff options
| author | Coly Li <colyli@suse.de> | 2023-11-20 13:24:55 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-12-08 08:44:25 +0100 |
| commit | c00163256ac4cf94d2b34fb592e99ed5ed49f394 (patch) | |
| tree | dafda8b6c73fb845e455a9ee316ec1b32e8a798c | |
| parent | a658ee7930116a71665eae9f740b4c7d054d1002 (diff) | |
bcache: check return value from btree_node_alloc_replacement()
commit 777967e7e9f6f5f3e153abffb562bffaf4430d26 upstream.
In btree_gc_rewrite_node(), pointer 'n' is not checked after it returns
from btree_gc_rewrite_node(). There is potential possibility that 'n' is
a non NULL ERR_PTR(), referencing such error code is not permitted in
following code. Therefore a return value checking is necessary after 'n'
is back from btree_node_alloc_replacement().
Signed-off-by: Coly Li <colyli@suse.de>
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20231120052503.6122-3-colyli@suse.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/md/bcache/btree.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/md/bcache/btree.c b/drivers/md/bcache/btree.c index f1cb65f442ac..15648445fc7b 100644 --- a/drivers/md/bcache/btree.c +++ b/drivers/md/bcache/btree.c @@ -1555,6 +1555,8 @@ static int btree_gc_rewrite_node(struct btree *b, struct btree_op *op, return 0; n = btree_node_alloc_replacement(replace, NULL); + if (IS_ERR(n)) + return 0; /* recheck reserve after allocating replacement node */ if (btree_check_reserve(b, NULL)) { |