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BUG: KASAN: use-after-free in tcindex_set_parms+0x17fd/0x1a00 net/sched/cls_tcindex.c:455
Write of size 16 at addr ffff88809f398a30 by task syz-executor.0/9532

CPU: 1 PID: 9532 Comm: syz-executor.0 Not tainted 5.6.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x188/0x20d lib/dump_stack.c:118
 print_address_description.constprop.0.cold+0xd3/0x315 mm/kasan/report.c:374
 __kasan_report.cold+0x1a/0x32 mm/kasan/report.c:506
 kasan_report+0xe/0x20 mm/kasan/common.c:641
 tcindex_set_parms+0x17fd/0x1a00 net/sched/cls_tcindex.c:455
 tcindex_change+0x203/0x2e0 net/sched/cls_tcindex.c:518
 tc_new_tfilter+0xa59/0x20b0 net/sched/cls_api.c:2103
 rtnetlink_rcv_msg+0x810/0xad0 net/core/rtnetlink.c:5427
 netlink_rcv_skb+0x15a/0x410 net/netlink/af_netlink.c:2478
 netlink_unicast_kernel net/netlink/af_netlink.c:1303 [inline]
 netlink_unicast+0x537/0x740 net/netlink/af_netlink.c:1329
 netlink_sendmsg+0x882/0xe10 net/netlink/af_netlink.c:1918
 sock_sendmsg_nosec net/socket.c:652 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:672
 ____sys_sendmsg+0x6b9/0x7d0 net/socket.c:2343
 ___sys_sendmsg+0x100/0x170 net/socket.c:2397
 __sys_sendmsg+0xec/0x1b0 net/socket.c:2430
 do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45c4a9
Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:0000000000c7fb78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 0000000001fde914 RCX: 000000000045c4a9
RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003
RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000009fa R14: 00000000004cc777 R15: 000000000076bf2c

Allocated by task 345:
 save_stack+0x1b/0x80 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 __kasan_kmalloc mm/kasan/common.c:515 [inline]
 __kasan_kmalloc.constprop.0+0xbf/0xd0 mm/kasan/common.c:488
 kmalloc_array_node include/linux/slab.h:632 [inline]
 kcalloc_node include/linux/slab.h:637 [inline]
 sbitmap_init_node+0x28f/0x4f0 lib/sbitmap.c:76
 blk_mq_alloc_hctx block/blk-mq.c:2403 [inline]
 blk_mq_alloc_and_init_hctx block/blk-mq.c:2794 [inline]
 blk_mq_realloc_hw_ctxs+0xc44/0x14a0 block/blk-mq.c:2847
 blk_mq_init_allocated_queue+0x328/0x13c0 block/blk-mq.c:2909
 blk_mq_init_queue+0x5c/0xa0 block/blk-mq.c:2733
 scsi_mq_alloc_queue+0x3e/0x170 drivers/scsi/scsi_lib.c:1871
 scsi_alloc_sdev+0x82e/0xc50 drivers/scsi/scsi_scan.c:269
 scsi_probe_and_add_lun+0x2110/0x34d0 drivers/scsi/scsi_scan.c:1078
 __scsi_scan_target+0x280/0xed0 drivers/scsi/scsi_scan.c:1562
 scsi_scan_channel.part.0+0x126/0x1a0 drivers/scsi/scsi_scan.c:1650
 scsi_scan_channel drivers/scsi/scsi_scan.c:1677 [inline]
 scsi_scan_host_selected+0x30b/0x450 drivers/scsi/scsi_scan.c:1679
 do_scsi_scan_host drivers/scsi/scsi_scan.c:1817 [inline]
 do_scsi_scan_host+0x1e8/0x260 drivers/scsi/scsi_scan.c:1807
 do_scan_async+0x40/0x500 drivers/scsi/scsi_scan.c:1827
 async_run_entry_fn+0x121/0x530 kernel/async.c:123
 process_one_work+0x94b/0x1690 kernel/workqueue.c:2264
 worker_thread+0x96/0xe20 kernel/workqueue.c:2410
 kthread+0x357/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

Freed by task 2891:
 save_stack+0x1b/0x80 mm/kasan/common.c:72
 set_track mm/kasan/common.c:80 [inline]
 kasan_set_free_info mm/kasan/common.c:337 [inline]
 __kasan_slab_free+0xf7/0x140 mm/kasan/common.c:476
 __cache_free mm/slab.c:3426 [inline]
 kfree+0x109/0x2b0 mm/slab.c:3757
 sbitmap_free include/linux/sbitmap.h:164 [inline]
 blk_mq_hw_sysfs_release+0xbf/0x160 block/blk-mq-sysfs.c:44
 kobject_cleanup lib/kobject.c:693 [inline]
 kobject_release lib/kobject.c:722 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1e7/0x2e0 lib/kobject.c:739
 blk_mq_release+0x24c/0x3f0 block/blk-mq.c:2709
 __blk_release_queue+0x205/0x380 block/blk-sysfs.c:894
 process_one_work+0x94b/0x1690 kernel/workqueue.c:2264
 worker_thread+0x96/0xe20 kernel/workqueue.c:2410
 kthread+0x357/0x430 kernel/kthread.c:255
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352

The buggy address belongs to the object at ffff88809f398a00
 which belongs to the cache kmalloc-192 of size 192
The buggy address is located 48 bytes inside of
 192-byte region [ffff88809f398a00, ffff88809f398ac0)
The buggy address belongs to the page:
page:ffffea00027ce600 refcount:1 mapcount:0 mapping:ffff8880aa000000 index:0x0
flags: 0xfffe0000000200(slab)
raw: 00fffe0000000200 ffffea00027ceb88 ffffea00027cb6c8 ffff8880aa000000
raw: 0000000000000000 ffff88809f398000 0000000100000010 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88809f398900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88809f398980: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88809f398a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff88809f398a80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
 ffff88809f398b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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