This is a note to let you know that I've just added the patch titled bcache: add proper error unwinding in bcache_device_init to the 5.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: bcache-add-proper-error-unwinding-in-bcache_device_i.patch and it can be found in the queue-5.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 631fc06e74f0201f5dea079e580a9c418064348d Author: Christoph Hellwig <hch@xxxxxx> Date: Mon Aug 9 08:40:26 2021 +0200 bcache: add proper error unwinding in bcache_device_init [ Upstream commit 224b0683228c5f332f9cee615d85e75e9a347170 ] Except for the IDA none of the allocations in bcache_device_init is unwound on error, fix that. Signed-off-by: Christoph Hellwig <hch@xxxxxx> Acked-by: Coly Li <colyli@xxxxxxx> Link: https://lore.kernel.org/r/20210809064028.1198327-7-hch@xxxxxx Signed-off-by: Jens Axboe <axboe@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index 185246a0d855..d0f08e946453 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -931,20 +931,20 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size, n = BITS_TO_LONGS(d->nr_stripes) * sizeof(unsigned long); d->full_dirty_stripes = kvzalloc(n, GFP_KERNEL); if (!d->full_dirty_stripes) - return -ENOMEM; + goto out_free_stripe_sectors_dirty; idx = ida_simple_get(&bcache_device_idx, 0, BCACHE_DEVICE_IDX_MAX, GFP_KERNEL); if (idx < 0) - return idx; + goto out_free_full_dirty_stripes; if (bioset_init(&d->bio_split, 4, offsetof(struct bbio, bio), BIOSET_NEED_BVECS|BIOSET_NEED_RESCUER)) - goto err; + goto out_ida_remove; d->disk = blk_alloc_disk(NUMA_NO_NODE); if (!d->disk) - goto err; + goto out_bioset_exit; set_capacity(d->disk, sectors); snprintf(d->disk->disk_name, DISK_NAME_LEN, "bcache%i", idx); @@ -987,8 +987,14 @@ static int bcache_device_init(struct bcache_device *d, unsigned int block_size, return 0; -err: +out_bioset_exit: + bioset_exit(&d->bio_split); +out_ida_remove: ida_simple_remove(&bcache_device_idx, idx); +out_free_full_dirty_stripes: + kvfree(d->full_dirty_stripes); +out_free_stripe_sectors_dirty: + kvfree(d->stripe_sectors_dirty); return -ENOMEM; }