[ 14.534540][ T261] gre: GRE over IPv4 demultiplexer driver
[ 15.258391][ T276] ip (276) used greatest stack depth: 24688 bytes left
[ 16.103217][ T284] ip_gre: GRE over IPv4 tunneling driver
[ 16.363385][ T291] ip (291) used greatest stack depth: 24576 bytes left
[ 17.857472][ T12] ==================================================================
[ 17.857736][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 17.857972][ T12] Read of size 1 at addr ffff88800a2c46c4 by task kworker/u16:0/12
[ 17.858193][ T12]
[ 17.858273][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.858277][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.858281][ T12] Workqueue: netns cleanup_net
[ 17.858288][ T12] Call Trace:
[ 17.858290][ T12]
[ 17.858292][ T12] dump_stack_lvl+0x82/0xc0
[ 17.858297][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 17.858304][ T12] ? kobject_put+0xbb/0xd0
[ 17.858307][ T12] print_report+0xb4/0x270
[ 17.858311][ T12] ? kobject_put+0xbb/0xd0
[ 17.858314][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 17.858318][ T12] ? kobject_put+0xbb/0xd0
[ 17.858320][ T12] kasan_report+0xca/0x100
[ 17.858324][ T12] ? kobject_put+0xbb/0xd0
[ 17.858330][ T12] kobject_put+0xbb/0xd0
[ 17.858333][ T12] netdev_run_todo+0x5f0/0xc60
[ 17.858338][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 17.858342][ T12] ? generic_xdp_install+0x410/0x410
[ 17.858345][ T12] ? net_generic+0xb1/0x1f0
[ 17.858353][ T12] ops_undo_list+0x714/0x890
[ 17.858358][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 17.858362][ T12] ? cleanup_net+0x2d6/0x8b0
[ 17.858367][ T12] cleanup_net+0x3b2/0x8b0
[ 17.858372][ T12] ? net_passive_dec+0x190/0x190
[ 17.858377][ T12] ? rcu_is_watching+0x12/0xb0
[ 17.858384][ T12] process_one_work+0xe35/0x1650
[ 17.858392][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 17.858398][ T12] ? assign_work+0x168/0x240
[ 17.858402][ T12] worker_thread+0x591/0xcf0
[ 17.858408][ T12] ? rescuer_thread+0xd10/0xd10
[ 17.858412][ T12] kthread+0x37b/0x5f0
[ 17.858415][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 17.858418][ T12] ? ret_from_fork+0x1b/0x270
[ 17.858422][ T12] ? __lock_release+0x5d/0x170
[ 17.858426][ T12] ? rcu_is_watching+0x12/0xb0
[ 17.858430][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 17.858434][ T12] ret_from_fork+0x1db/0x270
[ 17.858437][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 17.858440][ T12] ret_from_fork_asm+0x11/0x20
[ 17.858449][ T12]
[ 17.858451][ T12]
[ 17.864384][ T12] Allocated by task 284:
[ 17.864499][ T12] kasan_save_stack+0x24/0x40
[ 17.864663][ T12] kasan_save_track+0x14/0x30
[ 17.864821][ T12] __kasan_kmalloc+0x7b/0x90
[ 17.864974][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 17.865132][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 17.865288][ T12] __ip_tunnel_create+0x191/0x440
[ 17.865442][ T12] ip_tunnel_init_net+0x16f/0x4e0
[ 17.865594][ T12] ops_init+0x189/0x550
[ 17.865708][ T12] register_pernet_operations+0x31f/0x8b0
[ 17.865861][ T12] register_pernet_device+0x2a/0x60
[ 17.866011][ T12] 0xffffffffc0411051
[ 17.866126][ T12] do_one_initcall+0x8c/0x1d0
[ 17.866277][ T12] do_init_module+0x27a/0x860
[ 17.866430][ T12] load_module+0x1f40/0x2dd0
[ 17.866584][ T12] init_module_from_file+0xe9/0x150
[ 17.866735][ T12] idempotent_init_module+0x331/0x610
[ 17.866886][ T12] __x64_sys_finit_module+0xca/0x150
[ 17.867039][ T12] do_syscall_64+0xc1/0xfd0
[ 17.867192][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.867381][ T12]
[ 17.867460][ T12] Freed by task 12:
[ 17.867576][ T12] kasan_save_stack+0x24/0x40
[ 17.867730][ T12] kasan_save_track+0x14/0x30
[ 17.867882][ T12] __kasan_save_free_info+0x3b/0x60
[ 17.868037][ T12] __kasan_slab_free+0x3f/0x60
[ 17.868188][ T12] kfree+0x21d/0x540
[ 17.868306][ T12] device_release+0x9c/0x210
[ 17.868462][ T12] kobject_cleanup+0xfe/0x360
[ 17.868627][ T12] netdev_run_todo+0x81f/0xc60
[ 17.868794][ T12] ops_undo_list+0x714/0x890
[ 17.868958][ T12] cleanup_net+0x3b2/0x8b0
[ 17.869120][ T12] process_one_work+0xe35/0x1650
[ 17.869277][ T12] worker_thread+0x591/0xcf0
[ 17.869428][ T12] kthread+0x37b/0x5f0
[ 17.869543][ T12] ret_from_fork+0x1db/0x270
[ 17.869707][ T12] ret_from_fork_asm+0x11/0x20
[ 17.869862][ T12]
[ 17.869939][ T12] The buggy address belongs to the object at ffff88800a2c4000
[ 17.869939][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 17.870312][ T12] The buggy address is located 1732 bytes inside of
[ 17.870312][ T12] freed 4096-byte region [ffff88800a2c4000, ffff88800a2c5000)
[ 17.870680][ T12]
[ 17.870757][ T12] The buggy address belongs to the physical page:
[ 17.870946][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa2c0
[ 17.871217][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 17.871446][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 17.871641][ T12] page_type: f5(slab)
[ 17.871766][ T12] raw: 0080000000000040 ffff888001043700 ffffea000028b210 ffffea000030ac10
[ 17.872044][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 17.872323][ T12] head: 0080000000000040 ffff888001043700 ffffea000028b210 ffffea000030ac10
[ 17.872596][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 17.872870][ T12] head: 0080000000000003 ffffea000028b001 00000000ffffffff 00000000ffffffff
[ 17.873140][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 17.873417][ T12] page dumped because: kasan: bad access detected
[ 17.873607][ T12]
[ 17.873682][ T12] Memory state around the buggy address:
[ 17.873829][ T12] ffff88800a2c4580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 17.874049][ T12] ffff88800a2c4600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 17.874272][ T12] >ffff88800a2c4680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 17.874494][ T12] ^
[ 17.874677][ T12] ffff88800a2c4700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 17.874897][ T12] ffff88800a2c4780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 17.875117][ T12] ==================================================================
[ 17.875449][ T12] Disabling lock debugging due to kernel taint
[ 17.875639][ T12] ------------[ cut here ]------------
[ 17.875891][ T12] refcount_t: underflow; use-after-free.
[ 17.876218][ T12] WARNING: CPU: 1 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 17.876550][ T12] Modules linked in: ip_gre gre
[ 17.876740][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.877111][ T12] Tainted: [B]=BAD_PAGE
[ 17.877243][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.877432][ T12] Workqueue: netns cleanup_net
[ 17.877602][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 17.877793][ 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 25 9c 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
[ 17.878341][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 17.878536][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 17.878753][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 17.879081][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff3a40934
[ 17.879312][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 17.879551][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 17.879792][ T12] FS: 0000000000000000(0000) GS:ffff8880ce988000(0000) knlGS:0000000000000000
[ 17.880135][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 17.880329][ T12] CR2: 000055d67df3ab48 CR3: 0000000058f49005 CR4: 0000000000772ef0
[ 17.880577][ T12] PKRU: 55555554
[ 17.880696][ T12] Call Trace:
[ 17.880871][ T12]
[ 17.880956][ T12] netdev_run_todo+0x5f0/0xc60
[ 17.881121][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 17.881283][ T12] ? generic_xdp_install+0x410/0x410
[ 17.881432][ T12] ? net_generic+0xb1/0x1f0
[ 17.881586][ T12] ops_undo_list+0x714/0x890
[ 17.881737][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 17.881945][ T12] ? cleanup_net+0x2d6/0x8b0
[ 17.882104][ T12] cleanup_net+0x3b2/0x8b0
[ 17.882252][ T12] ? net_passive_dec+0x190/0x190
[ 17.882413][ T12] ? rcu_is_watching+0x12/0xb0
[ 17.882569][ T12] process_one_work+0xe35/0x1650
[ 17.882722][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 17.882934][ T12] ? assign_work+0x168/0x240
[ 17.883085][ T12] worker_thread+0x591/0xcf0
[ 17.883235][ T12] ? rescuer_thread+0xd10/0xd10
[ 17.883385][ T12] kthread+0x37b/0x5f0
[ 17.883500][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 17.883651][ T12] ? ret_from_fork+0x1b/0x270
[ 17.883863][ T12] ? __lock_release+0x5d/0x170
[ 17.884012][ T12] ? rcu_is_watching+0x12/0xb0
[ 17.884159][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 17.884306][ T12] ret_from_fork+0x1db/0x270
[ 17.884454][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 17.884603][ T12] ret_from_fork_asm+0x11/0x20
[ 17.884770][ T12]
[ 17.884937][ T12] irq event stamp: 30461
[ 17.885055][ T12] hardirqs last enabled at (30461): [] finish_task_switch.isra.0+0x245/0x960
[ 17.885363][ T12] hardirqs last disabled at (30460): [] __schedule+0x94a/0x1b10
[ 17.885619][ T12] softirqs last enabled at (27788): [] handle_softirqs+0x352/0x610
[ 17.885960][ T12] softirqs last disabled at (27663): [] irq_exit_rcu+0xab/0x100
[ 17.886228][ T12] ---[ end trace 0000000000000000 ]---
[ 28.873631][ T538] ping (538) used greatest stack depth: 24504 bytes left
[ 47.968820][ T859] ip6_gre: GRE over IPv6 tunneling driver
[ 69.549897][ C2] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 73.070918][ C3] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 76.013899][ C0] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 79.406907][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured!
[ 120.405092][ T2189] ping (2189) used greatest stack depth: 24440 bytes left
[ 180.413219][ T3349] ip (3349) used greatest stack depth: 24416 bytes left
[ 186.407570][ T3464] ping (3464) used greatest stack depth: 24248 bytes left