From 7fecca429e6eb5b6f4a8e8d3f8c75212aedfb0d7 Mon Sep 17 00:00:00 2001
From: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Date: Sat, 26 Nov 2022 09:25:58 +0800
Subject: [PATCH] memstick/ms_block: Add check for alloc_ordered_workqueue
[ Upstream commit 4f431a047a5c8698ed4b67e2760cfbeb5fffb69d ]
As the alloc_ordered_workqueue may return NULL pointer, it should be better
to add check for the return value. Moreover, the msb->io_queue should be
freed if error occurs later.
Fixes: 0ab30494bc4f ("memstick: add support for legacy memorysticks")
Signed-off-by: Jiasheng Jiang <jiasheng@iscas.ac.cn>
Link: https://lore.kernel.org/r/20221126012558.34374-1-jiasheng@iscas.ac.cn
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/memstick/core/ms_block.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/memstick/core/ms_block.c b/drivers/memstick/core/ms_block.c
index 29a69243cbd0a..7619c30b4ee10 100644
--- a/drivers/memstick/core/ms_block.c
+++ b/drivers/memstick/core/ms_block.c
@@ -2150,6 +2150,11 @@ static int msb_init_disk(struct memstick_dev *card)
msb->usage_count = 1;
msb->io_queue = alloc_ordered_workqueue("ms_block", WQ_MEM_RECLAIM);
+ if (!msb->io_queue) {
+ rc = -ENOMEM;
+ goto out_cleanup_disk;
+ }
+
INIT_WORK(&msb->io_work, msb_io_work);
sg_init_table(msb->prealloc_sg, MS_BLOCK_MAX_SEGS+1);
@@ -2159,10 +2164,12 @@ static int msb_init_disk(struct memstick_dev *card)
msb_start(card);
rc = device_add_disk(&card->dev, msb->disk, NULL);
if (rc)
- goto out_cleanup_disk;
+ goto out_destroy_workqueue;
dbg("Disk added");
return 0;
+out_destroy_workqueue:
+ destroy_workqueue(msb->io_queue);
out_cleanup_disk:
blk_cleanup_disk(msb->disk);
out_free_tag_set:
--
2.30.2