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Subject[syzbot] memory leak in blk_mq_init_tags
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Hello,

syzbot found the following issue on:

HEAD commit: 6b1f86f8e9c7 Merge tag 'folio-5.18b' of git://git.infradea..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13b41dcb700000
kernel config: https://syzkaller.appspot.com/x/.config?x=c6e80763d853259b
dashboard link: https://syzkaller.appspot.com/bug?extid=f08c77040fa163a75a46
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1564ecb3700000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f08c77040fa163a75a46@syzkaller.appspotmail.com

BUG: memory leak
unreferenced object 0xffff888118503c00 (size 192):
comm "kworker/u4:2", pid 52, jiffies 4294961137 (age 11.420s)
hex dump (first 32 bytes):
02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
02 00 00 00 06 00 00 00 01 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff822c042b>] kmalloc_node include/linux/slab.h:602 [inline]
[<ffffffff822c042b>] kzalloc_node include/linux/slab.h:728 [inline]
[<ffffffff822c042b>] blk_mq_init_tags+0x4b/0xc0 block/blk-mq-tag.c:578
[<ffffffff822b6caa>] blk_mq_alloc_rq_map+0xea/0x1a0 block/blk-mq.c:3169
[<ffffffff822bbb86>] blk_mq_alloc_map_and_rqs+0x26/0xb0 block/blk-mq.c:3620
[<ffffffff822c3437>] blk_mq_sched_alloc_map_and_rqs block/blk-mq-sched.c:507 [inline]
[<ffffffff822c3437>] blk_mq_init_sched+0x127/0x2e0 block/blk-mq-sched.c:587
[<ffffffff8229e6f9>] elevator_init_mq+0x1f9/0x240 block/elevator.c:709
[<ffffffff822c7085>] device_add_disk+0x25/0x510 block/genhd.c:421
[<ffffffff82846437>] sd_probe+0x457/0x670 drivers/scsi/sd.c:3551
[<ffffffff8270c477>] call_driver_probe drivers/base/dd.c:517 [inline]
[<ffffffff8270c477>] really_probe.part.0+0xe7/0x380 drivers/base/dd.c:596
[<ffffffff8270c81c>] really_probe drivers/base/dd.c:558 [inline]
[<ffffffff8270c81c>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:755
[<ffffffff8270c91a>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:785
[<ffffffff8270d186>] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:902
[<ffffffff827093e7>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427
[<ffffffff8270b9ef>] __device_attach_async_helper+0xcf/0x110 drivers/base/dd.c:931
[<ffffffff8127cf94>] async_run_entry_fn+0x24/0xf0 kernel/async.c:127
[<ffffffff8126b3ef>] process_one_work+0x2bf/0x600 kernel/workqueue.c:2307
[<ffffffff8126bd19>] worker_thread+0x59/0x5b0 kernel/workqueue.c:2454

BUG: memory leak
unreferenced object 0xffff888117fee680 (size 128):
comm "kworker/u4:2", pid 52, jiffies 4294961137 (age 11.420s)
hex dump (first 32 bytes):
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<ffffffff8240b6be>] kmalloc_array_node include/linux/slab.h:679 [inline]
[<ffffffff8240b6be>] kcalloc_node include/linux/slab.h:684 [inline]
[<ffffffff8240b6be>] sbitmap_init_node+0xde/0x2d0 lib/sbitmap.c:113
[<ffffffff8240b8ec>] sbitmap_queue_init_node+0x3c/0x1f0 lib/sbitmap.c:428
[<ffffffff822c0347>] bt_alloc block/blk-mq-tag.c:543 [inline]
[<ffffffff822c0347>] blk_mq_init_bitmaps+0x57/0xf0 block/blk-mq-tag.c:555
[<ffffffff822c0468>] blk_mq_init_tags+0x88/0xc0 block/blk-mq-tag.c:586
[<ffffffff822b6caa>] blk_mq_alloc_rq_map+0xea/0x1a0 block/blk-mq.c:3169
[<ffffffff822bbb86>] blk_mq_alloc_map_and_rqs+0x26/0xb0 block/blk-mq.c:3620
[<ffffffff822c3437>] blk_mq_sched_alloc_map_and_rqs block/blk-mq-sched.c:507 [inline]
[<ffffffff822c3437>] blk_mq_init_sched+0x127/0x2e0 block/blk-mq-sched.c:587
[<ffffffff8229e6f9>] elevator_init_mq+0x1f9/0x240 block/elevator.c:709
[<ffffffff822c7085>] device_add_disk+0x25/0x510 block/genhd.c:421
[<ffffffff82846437>] sd_probe+0x457/0x670 drivers/scsi/sd.c:3551
[<ffffffff8270c477>] call_driver_probe drivers/base/dd.c:517 [inline]
[<ffffffff8270c477>] really_probe.part.0+0xe7/0x380 drivers/base/dd.c:596
[<ffffffff8270c81c>] really_probe drivers/base/dd.c:558 [inline]
[<ffffffff8270c81c>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:755
[<ffffffff8270c91a>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:785
[<ffffffff8270d186>] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:902
[<ffffffff827093e7>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427
[<ffffffff8270b9ef>] __device_attach_async_helper+0xcf/0x110 drivers/base/dd.c:931

BUG: memory leak
unreferenced object 0xffff888116df4c00 (size 512):
comm "kworker/u4:2", pid 52, jiffies 4294961137 (age 11.420s)
hex dump (first 32 bytes):
01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
10 4c df 16 81 88 ff ff 10 4c df 16 81 88 ff ff .L.......L......
backtrace:
[<ffffffff8240b9b8>] kmalloc_node include/linux/slab.h:602 [inline]
[<ffffffff8240b9b8>] kzalloc_node include/linux/slab.h:728 [inline]
[<ffffffff8240b9b8>] sbitmap_queue_init_node+0x108/0x1f0 lib/sbitmap.c:438
[<ffffffff822c0377>] bt_alloc block/blk-mq-tag.c:543 [inline]
[<ffffffff822c0377>] blk_mq_init_bitmaps+0x87/0xf0 block/blk-mq-tag.c:557
[<ffffffff822c0468>] blk_mq_init_tags+0x88/0xc0 block/blk-mq-tag.c:586
[<ffffffff822b6caa>] blk_mq_alloc_rq_map+0xea/0x1a0 block/blk-mq.c:3169
[<ffffffff822bbb86>] blk_mq_alloc_map_and_rqs+0x26/0xb0 block/blk-mq.c:3620
[<ffffffff822c3437>] blk_mq_sched_alloc_map_and_rqs block/blk-mq-sched.c:507 [inline]
[<ffffffff822c3437>] blk_mq_init_sched+0x127/0x2e0 block/blk-mq-sched.c:587
[<ffffffff8229e6f9>] elevator_init_mq+0x1f9/0x240 block/elevator.c:709
[<ffffffff822c7085>] device_add_disk+0x25/0x510 block/genhd.c:421
[<ffffffff82846437>] sd_probe+0x457/0x670 drivers/scsi/sd.c:3551
[<ffffffff8270c477>] call_driver_probe drivers/base/dd.c:517 [inline]
[<ffffffff8270c477>] really_probe.part.0+0xe7/0x380 drivers/base/dd.c:596
[<ffffffff8270c81c>] really_probe drivers/base/dd.c:558 [inline]
[<ffffffff8270c81c>] __driver_probe_device+0x10c/0x1e0 drivers/base/dd.c:755
[<ffffffff8270c91a>] driver_probe_device+0x2a/0x120 drivers/base/dd.c:785
[<ffffffff8270d186>] __device_attach_driver+0xf6/0x140 drivers/base/dd.c:902
[<ffffffff827093e7>] bus_for_each_drv+0xb7/0x100 drivers/base/bus.c:427
[<ffffffff8270b9ef>] __device_attach_async_helper+0xcf/0x110 drivers/base/dd.c:931
[<ffffffff8127cf94>] async_run_entry_fn+0x24/0xf0 kernel/async.c:127



---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

syzbot will keep track of this issue. See:
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syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches

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