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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2022-07-15 11:12:14 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-25 12:15:19 +0300 |
| commit | 8603dff7a92e312ca3c30badbdc2aeda989922fe (patch) | |
| tree | ecb344ba0fc90b89c89f4dd9dfbfb09ecc80a6ad | |
| parent | 1a63f24e724f677db1ab21251f4d0011ae0bb5b5 (diff) | |
| download | linux-8603dff7a92e312ca3c30badbdc2aeda989922fe.tar.xz | |
null_blk: fix ida error handling in null_add_dev()
[ Upstream commit ee452a8d984f94fa8e894f003a52e776e4572881 ]
There needs to be some error checking if ida_simple_get() fails.
Also call ida_free() if there are errors later.
Fixes: 94bc02e30fb8 ("nullb: use ida to manage index")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/YtEhXsr6vJeoiYhd@kili
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
| -rw-r--r-- | drivers/block/null_blk_main.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c index 4fef1fb918ec..5553df736c72 100644 --- a/drivers/block/null_blk_main.c +++ b/drivers/block/null_blk_main.c @@ -1819,8 +1819,13 @@ static int null_add_dev(struct nullb_device *dev) blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, nullb->q); mutex_lock(&lock); - nullb->index = ida_simple_get(&nullb_indexes, 0, 0, GFP_KERNEL); - dev->index = nullb->index; + rv = ida_simple_get(&nullb_indexes, 0, 0, GFP_KERNEL); + if (rv < 0) { + mutex_unlock(&lock); + goto out_cleanup_zone; + } + nullb->index = rv; + dev->index = rv; mutex_unlock(&lock); blk_queue_logical_block_size(nullb->q, dev->blocksize); @@ -1832,13 +1837,16 @@ static int null_add_dev(struct nullb_device *dev) rv = null_gendisk_register(nullb); if (rv) - goto out_cleanup_zone; + goto out_ida_free; mutex_lock(&lock); list_add_tail(&nullb->list, &nullb_list); mutex_unlock(&lock); return 0; + +out_ida_free: + ida_free(&nullb_indexes, nullb->index); out_cleanup_zone: if (dev->zoned) null_zone_exit(dev); |