From: Christoph Hellwig hch@lst.de
stable inclusion from linux-4.19.207 commit 9ff23e9baeab1c3c918b957bb2ef7653d56ded44
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[ 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@lst.de Acked-by: Coly Li colyli@suse.de Link: https://lore.kernel.org/r/20210809064028.1198327-7-hch@lst.de Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/md/bcache/super.c | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c index e2828c762edc5..c66aeaaa39677 100644 --- a/drivers/md/bcache/super.c +++ b/drivers/md/bcache/super.c @@ -838,20 +838,20 @@ 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 = alloc_disk(BCACHE_MINORS); 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); @@ -886,8 +886,14 @@ 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;
}