[ 18.453834][ T279] ip (279) used greatest stack depth: 24160 bytes left
[ 20.048000][ T293] veth0: renamed from veth-hv-1
[ 21.279993][ T308] br0: port 1(vxlan0) entered blocking state
[ 21.280652][ T308] br0: port 1(vxlan0) entered disabled state
[ 21.281075][ T308] vxlan0: entered allmulticast mode
[ 21.283462][ T308] vxlan0: entered promiscuous mode
[ 21.444573][ T309] br0: port 1(vxlan0) entered blocking state
[ 21.445461][ T309] br0: port 1(vxlan0) entered forwarding state
[ 21.760329][ T311] veth0: renamed from veth-hv-2
[ 22.822943][ T319] br0: port 1(vxlan0) entered blocking state
[ 22.823591][ T319] br0: port 1(vxlan0) entered disabled state
[ 22.824609][ T319] vxlan0: entered allmulticast mode
[ 22.828304][ T319] vxlan0: entered promiscuous mode
[ 22.961763][ T320] br0: port 1(vxlan0) entered blocking state
[ 22.962213][ T320] br0: port 1(vxlan0) entered forwarding state
[ 23.676575][ T326] br0: port 2(veth-tap) entered blocking state
[ 23.677005][ T326] br0: port 2(veth-tap) entered disabled state
[ 23.677499][ T326] veth-tap: entered allmulticast mode
[ 23.679835][ T326] veth-tap: entered promiscuous mode
[ 24.342988][ T45] br0: port 2(veth-tap) entered blocking state
[ 24.343575][ T45] br0: port 2(veth-tap) entered forwarding state
[ 24.768933][ T337] br0: port 2(veth-tap) entered blocking state
[ 24.769354][ T337] br0: port 2(veth-tap) entered disabled state
[ 24.769768][ T337] veth-tap: entered allmulticast mode
[ 24.772087][ T337] veth-tap: entered promiscuous mode
[ 25.461192][ T126] br0: port 2(veth-tap) entered blocking state
[ 25.461607][ T126] br0: port 2(veth-tap) entered forwarding state
[ 26.209682][ T347] br0: port 1(vxlan0) entered disabled state
[ 26.339580][ T348] br0: port 1(vxlan0) entered blocking state
[ 26.340095][ T348] br0: port 1(vxlan0) entered forwarding state
[ 26.657945][ T350] br0: port 1(vxlan0) entered disabled state
[ 26.783553][ T351] br0: port 1(vxlan0) entered blocking state
[ 26.784063][ T351] br0: port 1(vxlan0) entered forwarding state
[ 27.980037][ T12] veth-tap: left allmulticast mode
[ 27.980518][ T12] veth-tap: left promiscuous mode
[ 27.981108][ T12] br0: port 2(veth-tap) entered disabled state
[ 27.984953][ T12] vxlan0: left allmulticast mode
[ 27.985355][ T12] vxlan0: left promiscuous mode
[ 27.985865][ T12] br0: port 1(vxlan0) entered disabled state
[ 28.062606][ T12] ==================================================================
[ 28.062923][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 28.063192][ T12] Read of size 1 at addr ffff88800a86c6c4 by task kworker/u16:0/12
[ 28.063471][ T12]
[ 28.063583][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 28.063589][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 28.063593][ T12] Workqueue: netns cleanup_net
[ 28.063604][ T12] Call Trace:
[ 28.063606][ T12]
[ 28.063609][ T12] dump_stack_lvl+0x82/0xc0
[ 28.063617][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 28.063626][ T12] ? kobject_put+0xbb/0xd0
[ 28.063630][ T12] print_report+0xb4/0x270
[ 28.063633][ T12] ? kobject_put+0xbb/0xd0
[ 28.063637][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 28.063640][ T12] ? kobject_put+0xbb/0xd0
[ 28.063643][ T12] kasan_report+0xca/0x100
[ 28.063647][ T12] ? kobject_put+0xbb/0xd0
[ 28.063653][ T12] kobject_put+0xbb/0xd0
[ 28.063656][ T12] netdev_run_todo+0x5f0/0xc60
[ 28.063662][ T12] ? rtnl_is_locked+0x15/0x20
[ 28.063666][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 28.063671][ T12] ? generic_xdp_install+0x410/0x410
[ 28.063683][ T12] ops_undo_list+0x714/0x890
[ 28.063691][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 28.063695][ T12] ? cleanup_net+0x2d6/0x8b0
[ 28.063703][ T12] cleanup_net+0x3b2/0x8b0
[ 28.063709][ T12] ? net_passive_dec+0x190/0x190
[ 28.063716][ T12] ? rcu_is_watching+0x12/0xb0
[ 28.063725][ T12] process_one_work+0xe35/0x1650
[ 28.063735][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 28.063741][ T12] ? assign_work+0x168/0x240
[ 28.063746][ T12] worker_thread+0x591/0xcf0
[ 28.063752][ T12] ? rescuer_thread+0xd10/0xd10
[ 28.063756][ T12] kthread+0x37b/0x5f0
[ 28.063760][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 28.063763][ T12] ? ret_from_fork+0x1b/0x270
[ 28.063768][ T12] ? __lock_release+0x5d/0x170
[ 28.063773][ T12] ? rcu_is_watching+0x12/0xb0
[ 28.063776][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 28.063780][ T12] ret_from_fork+0x1db/0x270
[ 28.063783][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 28.063786][ T12] ret_from_fork_asm+0x11/0x20
[ 28.063797][ T12]
[ 28.063798][ T12]
[ 28.070837][ T12] Allocated by task 268:
[ 28.070970][ T12] kasan_save_stack+0x24/0x40
[ 28.071158][ T12] kasan_save_track+0x14/0x30
[ 28.071335][ T12] __kasan_kmalloc+0x7b/0x90
[ 28.071525][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 28.071703][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 28.071885][ T12] ip6_tnl_init_net+0x102/0x3f0
[ 28.072061][ T12] ops_init+0x189/0x550
[ 28.072199][ T12] setup_net+0xf1/0x380
[ 28.072334][ T12] copy_net_ns+0x253/0x510
[ 28.072525][ T12] create_new_namespaces+0x35f/0x900
[ 28.072705][ T12] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 28.072882][ T12] ksys_unshare+0x2be/0x6e0
[ 28.073056][ T12] __x64_sys_unshare+0x31/0x40
[ 28.073225][ T12] do_syscall_64+0xc1/0xfd0
[ 28.073423][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 28.073646][ T12]
[ 28.073758][ T12] Freed by task 12:
[ 28.073938][ T12] kasan_save_stack+0x24/0x40
[ 28.074196][ T12] kasan_save_track+0x14/0x30
[ 28.074460][ T12] __kasan_save_free_info+0x3b/0x60
[ 28.074717][ T12] __kasan_slab_free+0x3f/0x60
[ 28.074978][ T12] kfree+0x21d/0x540
[ 28.075187][ T12] device_release+0x9c/0x210
[ 28.075448][ T12] kobject_cleanup+0xfe/0x360
[ 28.075710][ T12] netdev_run_todo+0x81f/0xc60
[ 28.075974][ T12] ops_undo_list+0x714/0x890
[ 28.076238][ T12] cleanup_net+0x3b2/0x8b0
[ 28.076505][ T12] process_one_work+0xe35/0x1650
[ 28.076771][ T12] worker_thread+0x591/0xcf0
[ 28.076999][ T12] kthread+0x37b/0x5f0
[ 28.077127][ T12] ret_from_fork+0x1db/0x270
[ 28.077297][ T12] ret_from_fork_asm+0x11/0x20
[ 28.077467][ T12]
[ 28.077550][ T12] The buggy address belongs to the object at ffff88800a86c000
[ 28.077550][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 28.077958][ T12] The buggy address is located 1732 bytes inside of
[ 28.077958][ T12] freed 4096-byte region [ffff88800a86c000, ffff88800a86d000)
[ 28.078352][ T12]
[ 28.078438][ T12] The buggy address belongs to the physical page:
[ 28.078637][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa868
[ 28.078946][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 28.079190][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 28.079399][ T12] page_type: f5(slab)
[ 28.079532][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000255810 ffffea0000284e10
[ 28.079838][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 28.080135][ T12] head: 0080000000000040 ffff888001043700 ffffea0000255810 ffffea0000284e10
[ 28.080432][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 28.080732][ T12] head: 0080000000000003 ffffea00002a1a01 00000000ffffffff 00000000ffffffff
[ 28.081018][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 28.081306][ T12] page dumped because: kasan: bad access detected
[ 28.081510][ T12]
[ 28.081595][ T12] Memory state around the buggy address:
[ 28.081764][ T12] ffff88800a86c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.082008][ T12] ffff88800a86c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.082238][ T12] >ffff88800a86c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.082483][ T12] ^
[ 28.082688][ T12] ffff88800a86c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.082929][ T12] ffff88800a86c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 28.083164][ T12] ==================================================================
[ 28.084028][ T12] Disabling lock debugging due to kernel taint
[ 28.084742][ T12] ------------[ cut here ]------------
[ 28.084897][ T12] refcount_t: underflow; use-after-free.
[ 28.085149][ T12] WARNING: CPU: 1 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 28.085439][ T12] Modules linked in: vxlan
[ 28.085618][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 28.085988][ T12] Tainted: [B]=BAD_PAGE
[ 28.086109][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 28.086323][ T12] Workqueue: netns cleanup_net
[ 28.086507][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 28.086720][ T12] Code: cc 38 03 80 fb 01 0f 87 29 33 d7 fe 83 e3 01 0f 85 51 ff ff ff c6 05 17 cc 38 03 01 90 48 c7 c7 40 ba a5 84 e8 62 d6 16 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 c0 9d a0 ff e9 ba fe ff ff
[ 28.087280][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 28.087503][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 28.087768][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 28.088010][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff0b40934
[ 28.088256][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 28.088509][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 28.088845][ T12] FS: 0000000000000000(0000) GS:ffff8880e6188000(0000) knlGS:0000000000000000
[ 28.089303][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 28.089622][ T12] CR2: 00005616cf91a968 CR3: 0000000033349004 CR4: 0000000000772ef0
[ 28.090015][ T12] PKRU: 55555554
[ 28.090219][ T12] Call Trace:
[ 28.090345][ T12]
[ 28.090431][ T12] netdev_run_todo+0x5f0/0xc60
[ 28.090606][ T12] ? rtnl_is_locked+0x15/0x20
[ 28.090773][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 28.090928][ T12] ? generic_xdp_install+0x410/0x410
[ 28.091089][ T12] ops_undo_list+0x714/0x890
[ 28.091255][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 28.091411][ T12] ? cleanup_net+0x2d6/0x8b0
[ 28.091576][ T12] cleanup_net+0x3b2/0x8b0
[ 28.091739][ T12] ? net_passive_dec+0x190/0x190
[ 28.091897][ T12] ? rcu_is_watching+0x12/0xb0
[ 28.092084][ T12] process_one_work+0xe35/0x1650
[ 28.092255][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 28.092412][ T12] ? assign_work+0x168/0x240
[ 28.092566][ T12] worker_thread+0x591/0xcf0
[ 28.092736][ T12] ? rescuer_thread+0xd10/0xd10
[ 28.092904][ T12] kthread+0x37b/0x5f0
[ 28.093024][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 28.093181][ T12] ? ret_from_fork+0x1b/0x270
[ 28.093341][ T12] ? __lock_release+0x5d/0x170
[ 28.093503][ T12] ? rcu_is_watching+0x12/0xb0
[ 28.093661][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 28.093826][ T12] ret_from_fork+0x1db/0x270
[ 28.093978][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 28.094141][ T12] ret_from_fork_asm+0x11/0x20
[ 28.094312][ T12]
[ 28.094435][ T12] irq event stamp: 43083
[ 28.094551][ T12] hardirqs last enabled at (43083): [] finish_task_switch.isra.0+0x245/0x960
[ 28.094876][ T12] hardirqs last disabled at (43082): [] __schedule+0x94a/0x1b10
[ 28.095147][ T12] softirqs last enabled at (42660): [] handle_softirqs+0x352/0x610
[ 28.095433][ T12] softirqs last disabled at (42549): [] irq_exit_rcu+0xab/0x100
[ 28.095804][ T12] ---[ end trace 0000000000000000 ]---
[ 28.137729][ T12] br0: port 1(vxlan0) entered disabled state
[ 28.140424][ T12] vxlan0 (unregistering): left allmulticast mode
[ 28.140747][ T12] vxlan0 (unregistering): left promiscuous mode
[ 28.141004][ T12] br0: port 1(vxlan0) entered disabled state
[ 28.412477][ T12] veth-tap: left allmulticast mode
[ 28.412700][ T12] veth-tap: left promiscuous mode
[ 28.413007][ T12] br0: port 2(veth-tap) entered disabled state