==================================================================
BUG: KASAN: slab-use-after-free in mini_qdisc_pair_swap+0x1ad/0x1c0 net/sched/sch_generic.c:1573
Write of size 8 at addr ffff888068688b08 by task syz-executor.0/6145

CPU: 0 PID: 6145 Comm: syz-executor.0 Not tainted 6.4.0-rc2-syzkaller-00330-g0dd2a6fb1e34 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:351 [inline]
 print_report+0x15f/0x540 mm/kasan/report.c:462
 kasan_report+0x172/0x1a0 mm/kasan/report.c:572
 mini_qdisc_pair_swap+0x1ad/0x1c0 net/sched/sch_generic.c:1573
 tcf_chain_head_change_item net/sched/cls_api.c:495 [inline]
 tcf_chain0_head_change net/sched/cls_api.c:509 [inline]
 tcf_chain_tp_insert net/sched/cls_api.c:1827 [inline]
 tcf_chain_tp_insert_unique+0xb5f/0xd50 net/sched/cls_api.c:1876
 tc_new_tfilter+0x1680/0x1af0 net/sched/cls_api.c:2267
 rtnetlink_rcv_msg+0x86f/0xf40 net/core/rtnetlink.c:6386
 netlink_rcv_skb+0x1db/0x420 net/netlink/af_netlink.c:2546
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x7bf/0x990 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1913
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg net/socket.c:747 [inline]
 ____sys_sendmsg+0x58b/0x880 net/socket.c:2503
 ___sys_sendmsg net/socket.c:2557 [inline]
 __sys_sendmmsg+0x3ab/0x730 net/socket.c:2643
 __do_sys_sendmmsg net/socket.c:2672 [inline]
 __se_sys_sendmmsg net/socket.c:2669 [inline]
 __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2669
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f4f8bc8c169
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f4f8c9cf168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f4f8bdabf80 RCX: 00007f4f8bc8c169
RDX: 040000000000009f RSI: 00000000200002c0 RDI: 0000000000000006
RBP: 00007f4f8bce7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdeeb5846f R14: 00007f4f8c9cf300 R15: 0000000000022000
 </TASK>

Allocated by task 6156:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0x94/0xa0 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:196 [inline]
 __do_kmalloc_node mm/slab_common.c:966 [inline]
 __kmalloc_node+0xb4/0x220 mm/slab_common.c:973
 kmalloc_node include/linux/slab.h:579 [inline]
 kzalloc_node include/linux/slab.h:691 [inline]
 qdisc_alloc+0x91/0x940 net/sched/sch_generic.c:938
 qdisc_create+0x185/0x10e0 net/sched/sch_api.c:1246
 tc_modify_qdisc+0xaac/0x1c90
 rtnetlink_rcv_msg+0x821/0xf40 net/core/rtnetlink.c:6395
 netlink_rcv_skb+0x1db/0x420 net/netlink/af_netlink.c:2546
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x7bf/0x990 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1913
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg net/socket.c:747 [inline]
 ____sys_sendmsg+0x58b/0x880 net/socket.c:2503
 ___sys_sendmsg net/socket.c:2557 [inline]
 __sys_sendmmsg+0x3ab/0x730 net/socket.c:2643
 __do_sys_sendmmsg net/socket.c:2672 [inline]
 __se_sys_sendmmsg net/socket.c:2669 [inline]
 __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2669
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 5384:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:521
 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
 kasan_slab_free include/linux/kasan.h:162 [inline]
 slab_free_hook mm/slub.c:1781 [inline]
 slab_free_freelist_hook mm/slub.c:1807 [inline]
 slab_free mm/slub.c:3786 [inline]
 __kmem_cache_free+0x25c/0x3c0 mm/slub.c:3799
 rcu_do_batch kernel/rcu/tree.c:2115 [inline]
 rcu_core+0x9d3/0x15f0 kernel/rcu/tree.c:2377
 __do_softirq+0x2a7/0x8fc kernel/softirq.c:571

Last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:491
 __call_rcu_common kernel/rcu/tree.c:2627 [inline]
 call_rcu+0x163/0xa70 kernel/rcu/tree.c:2741
 qdisc_put_unlocked+0x55/0x90 net/sched/sch_generic.c:1097
 tcf_block_release net/sched/cls_api.c:1362 [inline]
 tc_new_tfilter+0x1fb/0x1af0 net/sched/cls_api.c:2332
 rtnetlink_rcv_msg+0x86f/0xf40 net/core/rtnetlink.c:6386
 netlink_rcv_skb+0x1db/0x420 net/netlink/af_netlink.c:2546
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x7bf/0x990 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1913
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg net/socket.c:747 [inline]
 ____sys_sendmsg+0x58b/0x880 net/socket.c:2503
 ___sys_sendmsg net/socket.c:2557 [inline]
 __sys_sendmmsg+0x3ab/0x730 net/socket.c:2643
 __do_sys_sendmmsg net/socket.c:2672 [inline]
 __se_sys_sendmmsg net/socket.c:2669 [inline]
 __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2669
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Second to last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb0/0xc0 mm/kasan/generic.c:491
 __call_rcu_common kernel/rcu/tree.c:2627 [inline]
 call_rcu+0x163/0xa70 kernel/rcu/tree.c:2741
 rhashtable_rehash_table lib/rhashtable.c:348 [inline]
 rht_deferred_worker+0x1925/0x2080 lib/rhashtable.c:432
 process_one_work+0x894/0x10c0 kernel/workqueue.c:2405
 worker_thread+0xa5f/0x1210 kernel/workqueue.c:2552
 kthread+0x2b0/0x340 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

The buggy address belongs to the object at ffff888068688800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 776 bytes inside of
 freed 1024-byte region [ffff888068688800, ffff888068688c00)

The buggy address belongs to the physical page:
page:ffffea0001a1a200 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888068688000 pfn:0x68688
head:ffffea0001a1a200 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000010200 ffff888012441dc0 ffffea0001a91c10 ffffea0001ec1c10
raw: ffff888068688000 000000000010000b 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5781, tgid 5778 (syz-executor.5), ts 115758728585, free_ts 21603726294
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1d2/0x1f0 mm/page_alloc.c:1731
 prep_new_page mm/page_alloc.c:1738 [inline]
 get_page_from_freelist+0x31f8/0x3370 mm/page_alloc.c:3502
 __alloc_pages+0x251/0x660 mm/page_alloc.c:4768
 alloc_slab_page+0x6a/0x150 mm/slub.c:1851
 allocate_slab mm/slub.c:1998 [inline]
 new_slab+0x84/0x2d0 mm/slub.c:2051
 ___slab_alloc+0xa71/0x1080 mm/slub.c:3192
 __slab_alloc mm/slub.c:3291 [inline]
 __slab_alloc_node mm/slub.c:3344 [inline]
 slab_alloc_node mm/slub.c:3441 [inline]
 __kmem_cache_alloc_node+0x1b4/0x280 mm/slub.c:3490
 kmalloc_trace+0x26/0xe0 mm/slab_common.c:1057
 kmalloc include/linux/slab.h:559 [inline]
 kzalloc include/linux/slab.h:680 [inline]
 fl_init+0x4f/0x1c0 net/sched/cls_flower.c:351
 tcf_proto_create+0x1db/0x2a0 net/sched/cls_api.c:398
 tc_new_tfilter+0x164d/0x1af0 net/sched/cls_api.c:2259
 rtnetlink_rcv_msg+0x86f/0xf40 net/core/rtnetlink.c:6386
 netlink_rcv_skb+0x1db/0x420 net/netlink/af_netlink.c:2546
 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
 netlink_unicast+0x7bf/0x990 net/netlink/af_netlink.c:1365
 netlink_sendmsg+0xa26/0xd60 net/netlink/af_netlink.c:1913
 sock_sendmsg_nosec net/socket.c:724 [inline]
 sock_sendmsg net/socket.c:747 [inline]
 ____sys_sendmsg+0x58b/0x880 net/socket.c:2503
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1302 [inline]
 free_unref_page_prepare+0x8ee/0xa10 mm/page_alloc.c:2564
 free_unref_page+0x33/0x3f0 mm/page_alloc.c:2659
 free_contig_range+0x9a/0x150 mm/page_alloc.c:6994
 destroy_args+0xfe/0x9a0 mm/debug_vm_pgtable.c:1023
 debug_vm_pgtable+0x401/0x480 mm/debug_vm_pgtable.c:1403
 do_one_initcall+0x239/0x7c0 init/main.c:1246
 do_initcall_level+0x157/0x210 init/main.c:1319
 do_initcalls+0x3f/0x80 init/main.c:1335
 kernel_init_freeable+0x437/0x5c0 init/main.c:1571
 kernel_init+0x19/0x290 init/main.c:1462
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308

Memory state around the buggy address:
 ffff888068688a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888068688a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888068688b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                      ^
 ffff888068688b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888068688c00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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