netdevsim netdevsim2 netdevsim1 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
netdevsim netdevsim2 netdevsim0 (unregistering): unset [1, 0] type 2 family 0 port 6081 - 0
==================================================================
BUG: KASAN: slab-use-after-free in mini_qdisc_pair_swap+0x19d/0x1f0 net/sched/sch_generic.c:1570
Read of size 8 at addr ffff88802afbd000 by task kworker/u32:1/13

CPU: 3 UID: 0 PID: 13 Comm: kworker/u32:1 Not tainted 6.16.0-rc4-syzkaller-00013-g66701750d556 #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:408 [inline]
 print_report+0xcd/0x680 mm/kasan/report.c:521
 kasan_report+0xe0/0x110 mm/kasan/report.c:634
 mini_qdisc_pair_swap+0x19d/0x1f0 net/sched/sch_generic.c:1570
 tcf_chain_head_change_item net/sched/cls_api.c:522 [inline]
 tcf_chain0_head_change_cb_del+0x1a5/0x3e0 net/sched/cls_api.c:969
 tcf_block_put_ext+0xb4/0x1c0 net/sched/cls_api.c:1559
 clsact_destroy+0x2c0/0x9b0 net/sched/sch_ingress.c:302
 __qdisc_destroy+0x106/0x4d0 net/sched/sch_generic.c:1079
 qdisc_put+0xab/0xe0 net/sched/sch_generic.c:1107
 shutdown_scheduler_queue+0xa5/0x160 net/sched/sch_generic.c:1160
 dev_shutdown+0x180/0x430 net/sched/sch_generic.c:1494
 unregister_netdevice_many_notify+0xb3c/0x2700 net/core/dev.c:12065
 unregister_netdevice_many net/core/dev.c:12140 [inline]
 unregister_netdevice_queue+0x305/0x3f0 net/core/dev.c:11984
 unregister_netdevice include/linux/netdevice.h:3379 [inline]
 nsim_destroy+0x197/0x5d0 drivers/net/netdevsim/netdev.c:1069
 __nsim_dev_port_del+0x189/0x240 drivers/net/netdevsim/dev.c:1428
 nsim_dev_port_del_all drivers/net/netdevsim/dev.c:1440 [inline]
 nsim_dev_reload_destroy+0x10a/0x4d0 drivers/net/netdevsim/dev.c:1661
 nsim_dev_reload_down+0x6e/0xd0 drivers/net/netdevsim/dev.c:968
 devlink_reload+0x19e/0x7c0 net/devlink/dev.c:461
 devlink_pernet_pre_exit+0x1a0/0x2b0 net/devlink/core.c:509
 ops_pre_exit_list net/core/net_namespace.c:162 [inline]
 ops_undo_list+0x187/0xab0 net/core/net_namespace.c:235
 cleanup_net+0x408/0x890 net/core/net_namespace.c:686
 process_one_work+0x9cf/0x1b70 kernel/workqueue.c:3238
 process_scheduled_works kernel/workqueue.c:3321 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3402
 kthread+0x3c2/0x780 kernel/kthread.c:464
 ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>

Allocated by task 7417:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4328 [inline]
 __kmalloc_node_track_caller_noprof+0x221/0x510 mm/slub.c:4347
 kmalloc_reserve+0xef/0x2c0 net/core/skbuff.c:601
 pskb_expand_head+0x238/0x1030 net/core/skbuff.c:2241
 netlink_trim+0x22d/0x310 net/netlink/af_netlink.c:1295
 netlink_broadcast_filtered+0xca/0xf10 net/netlink/af_netlink.c:1501
 nlmsg_multicast_filtered include/net/netlink.h:1151 [inline]
 nlmsg_multicast include/net/netlink.h:1170 [inline]
 nlmsg_notify+0x9e/0x220 net/netlink/af_netlink.c:2577
 rtnl_notify net/core/rtnetlink.c:958 [inline]
 rtmsg_ifinfo_send net/core/rtnetlink.c:4419 [inline]
 rtmsg_ifinfo_event net/core/rtnetlink.c:4435 [inline]
 rtmsg_ifinfo_event net/core/rtnetlink.c:4422 [inline]
 rtmsg_ifinfo+0x174/0x1a0 net/core/rtnetlink.c:4441
 register_netdevice+0x1bd9/0x2270 net/core/dev.c:11157
 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:965 [inline]
 nsim_create+0xc70/0x10a0 drivers/net/netdevsim/netdev.c:1033
 __nsim_dev_port_add+0x42b/0x7d0 drivers/net/netdevsim/dev.c:1393
 nsim_dev_port_add_all drivers/net/netdevsim/dev.c:1449 [inline]
 nsim_drv_probe+0xdca/0x1490 drivers/net/netdevsim/dev.c:1607
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x241/0xa90 drivers/base/dd.c:657
 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:799
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829
 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:957
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:462
 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1029
 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
 device_add+0x1148/0x1a70 drivers/base/core.c:3692
 nsim_bus_dev_new drivers/net/netdevsim/bus.c:442 [inline]
 new_device_store+0x41b/0x730 drivers/net/netdevsim/bus.c:173
 bus_attr_store+0x74/0xb0 drivers/base/bus.c:172
 sysfs_kf_write+0xef/0x150 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x354/0x510 fs/kernfs/file.c:334
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x6c4/0x1150 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 7417:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2381 [inline]
 slab_free mm/slub.c:4643 [inline]
 kfree+0x2b4/0x4d0 mm/slub.c:4842
 skb_kfree_head net/core/skbuff.c:1048 [inline]
 skb_free_head+0x114/0x210 net/core/skbuff.c:1060
 skb_release_data+0x776/0x9c0 net/core/skbuff.c:1087
 skb_release_all net/core/skbuff.c:1152 [inline]
 __kfree_skb net/core/skbuff.c:1166 [inline]
 consume_skb net/core/skbuff.c:1398 [inline]
 consume_skb+0xbf/0x100 net/core/skbuff.c:1392
 netlink_broadcast_filtered+0x3d5/0xf10 net/netlink/af_netlink.c:1524
 nlmsg_multicast_filtered include/net/netlink.h:1151 [inline]
 nlmsg_multicast include/net/netlink.h:1170 [inline]
 nlmsg_notify+0x9e/0x220 net/netlink/af_netlink.c:2577
 rtnl_notify net/core/rtnetlink.c:958 [inline]
 rtmsg_ifinfo_send net/core/rtnetlink.c:4419 [inline]
 rtmsg_ifinfo_event net/core/rtnetlink.c:4435 [inline]
 rtmsg_ifinfo_event net/core/rtnetlink.c:4422 [inline]
 rtmsg_ifinfo+0x174/0x1a0 net/core/rtnetlink.c:4441
 register_netdevice+0x1bd9/0x2270 net/core/dev.c:11157
 nsim_init_netdevsim drivers/net/netdevsim/netdev.c:965 [inline]
 nsim_create+0xc70/0x10a0 drivers/net/netdevsim/netdev.c:1033
 __nsim_dev_port_add+0x42b/0x7d0 drivers/net/netdevsim/dev.c:1393
 nsim_dev_port_add_all drivers/net/netdevsim/dev.c:1449 [inline]
 nsim_drv_probe+0xdca/0x1490 drivers/net/netdevsim/dev.c:1607
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x241/0xa90 drivers/base/dd.c:657
 __driver_probe_device+0x1de/0x440 drivers/base/dd.c:799
 driver_probe_device+0x4c/0x1b0 drivers/base/dd.c:829
 __device_attach_driver+0x1df/0x310 drivers/base/dd.c:957
 bus_for_each_drv+0x159/0x1e0 drivers/base/bus.c:462
 __device_attach+0x1e4/0x4b0 drivers/base/dd.c:1029
 bus_probe_device+0x17f/0x1c0 drivers/base/bus.c:537
 device_add+0x1148/0x1a70 drivers/base/core.c:3692
 nsim_bus_dev_new drivers/net/netdevsim/bus.c:442 [inline]
 new_device_store+0x41b/0x730 drivers/net/netdevsim/bus.c:173
 bus_attr_store+0x74/0xb0 drivers/base/bus.c:172
 sysfs_kf_write+0xef/0x150 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x354/0x510 fs/kernfs/file.c:334
 new_sync_write fs/read_write.c:593 [inline]
 vfs_write+0x6c4/0x1150 fs/read_write.c:686
 ksys_write+0x12a/0x250 fs/read_write.c:738
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88802afbd000
 which belongs to the cache kmalloc-2k of size 2048
The buggy address is located 0 bytes inside of
 freed 2048-byte region [ffff88802afbd000, ffff88802afbd800)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88802afbc000 pfn:0x2afb8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801b842f00 ffffea000092fc10 ffffea0000b0ac10
raw: ffff88802afbc000 0000000000080006 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801b842f00 ffffea000092fc10 ffffea0000b0ac10
head: ffff88802afbc000 0000000000080006 00000000f5000000 0000000000000000
head: 00fff00000000003 ffffea0000abee01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5943, tgid 5943 (syz-executor), ts 50869839384, free_ts 50385580965
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1704
 prep_new_page mm/page_alloc.c:1712 [inline]
 get_page_from_freelist+0x1321/0x3890 mm/page_alloc.c:3669
 __alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:4959
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2419
 alloc_slab_page mm/slub.c:2451 [inline]
 allocate_slab mm/slub.c:2619 [inline]
 new_slab+0x23b/0x330 mm/slub.c:2673
 ___slab_alloc+0xd9c/0x1940 mm/slub.c:3859
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3949
 __slab_alloc_node mm/slub.c:4024 [inline]
 slab_alloc_node mm/slub.c:4185 [inline]
 __kmalloc_cache_noprof+0xfb/0x3e0 mm/slub.c:4354
 kmalloc_noprof include/linux/slab.h:905 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 rxrpc_alloc_connection+0xa3/0x770 net/rxrpc/conn_object.c:62
 rxrpc_prealloc_service_connection+0x26/0x390 net/rxrpc/conn_service.c:123
 rxrpc_service_prealloc_one+0x2c7/0xfd0 net/rxrpc/call_accept.c:86
 rxrpc_kernel_charge_accept+0xcd/0x110 net/rxrpc/call_accept.c:474
 afs_charge_preallocation+0xc6/0x320 fs/afs/rxrpc.c:758
 afs_open_socket+0x323/0x400 fs/afs/rxrpc.c:112
 afs_net_init+0x825/0xb00 fs/afs/main.c:116
 ops_init+0x1df/0x5f0 net/core/net_namespace.c:138
page last free pid 5909 tgid 5909 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1248 [inline]
 __free_frozen_pages+0x7fe/0x1180 mm/page_alloc.c:2706
 __folio_put+0x329/0x450 mm/swap.c:112
 folio_put include/linux/mm.h:1356 [inline]
 put_page include/linux/mm.h:1425 [inline]
 put_netmem net/core/skbuff.c:7372 [inline]
 skb_page_unref include/linux/skbuff_ref.h:43 [inline]
 __skb_frag_unref include/linux/skbuff_ref.h:56 [inline]
 skb_release_data+0x7fb/0x9c0 net/core/skbuff.c:1081
 skb_release_all net/core/skbuff.c:1152 [inline]
 napi_consume_skb+0x15a/0x220 net/core/skbuff.c:1480
 skb_defer_free_flush net/core/dev.c:6634 [inline]
 skb_defer_free_flush net/core/dev.c:6618 [inline]
 net_rx_action+0x47f/0xfe0 net/core/dev.c:7586
 handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
 do_softirq kernel/softirq.c:480 [inline]
 do_softirq+0xb2/0xf0 kernel/softirq.c:467
 __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:407
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:910 [inline]
 __dev_queue_xmit+0x8ab/0x43e0 net/core/dev.c:4740
 dev_queue_xmit include/linux/netdevice.h:3355 [inline]
 neigh_hh_output include/net/neighbour.h:523 [inline]
 neigh_output include/net/neighbour.h:537 [inline]
 ip_finish_output2+0xc38/0x21a0 net/ipv4/ip_output.c:235
 __ip_finish_output net/ipv4/ip_output.c:313 [inline]
 __ip_finish_output+0x49e/0x950 net/ipv4/ip_output.c:295
 ip_finish_output+0x35/0x380 net/ipv4/ip_output.c:323
 NF_HOOK_COND include/linux/netfilter.h:306 [inline]
 ip_output+0x13b/0x2a0 net/ipv4/ip_output.c:433
 dst_output include/net/dst.h:459 [inline]
 ip_local_out net/ipv4/ip_output.c:129 [inline]
 __ip_queue_xmit+0x1d7d/0x26c0 net/ipv4/ip_output.c:527
 __tcp_transmit_skb+0x2686/0x3e90 net/ipv4/tcp_output.c:1479
 __tcp_send_ack.part.0+0x3de/0x700 net/ipv4/tcp_output.c:4279

Memory state around the buggy address:
 ffff88802afbcf00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802afbcf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802afbd000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88802afbd080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802afbd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================