[ 16.781340][ T246] ip (246) used greatest stack depth: 23760 bytes left
[ 19.781678][ T282] bond0: (slave veth0): Enslaving as a backup interface with a down link
[ 19.925484][ T283] bond0: (slave veth1): Enslaving as a backup interface with a down link
[ 20.130857][ T284] br0: port 1(veth0) entered blocking state
[ 20.131414][ T284] br0: port 1(veth0) entered disabled state
[ 20.131944][ T284] veth0: entered allmulticast mode
[ 20.134331][ T284] veth0: entered promiscuous mode
[ 20.278383][ T285] br0: port 2(veth1) entered blocking state
[ 20.278827][ T285] br0: port 2(veth1) entered disabled state
[ 20.279252][ T285] veth1: entered allmulticast mode
[ 20.282167][ T285] veth1: entered promiscuous mode
[ 21.435822][ T155] br0: port 1(veth0) entered blocking state
[ 21.436338][ T155] br0: port 1(veth0) entered forwarding state
[ 21.438936][ T155] br0: port 2(veth1) entered blocking state
[ 21.439420][ T155] br0: port 2(veth1) entered forwarding state
[ 22.729527][ T12] bond0: (slave veth0): link status definitely up
[ 22.730745][ T12] bond0: (slave veth1): link status definitely up
[ 22.731294][ T12] bond0: (slave veth0): making interface the new active one
[ 22.733630][ T12] bond0: active interface up!
[ 23.249989][ T12] veth1: left allmulticast mode
[ 23.250782][ T12] veth1: left promiscuous mode
[ 23.251790][ T12] br0: port 2(veth1) entered disabled state
[ 23.255424][ T12] veth0: left allmulticast mode
[ 23.255977][ T12] veth0: left promiscuous mode
[ 23.256667][ T12] br0: port 1(veth0) entered disabled state
[ 23.306676][ T12] ==================================================================
[ 23.307124][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 23.307509][ T12] Read of size 1 at addr ffff888001e1469c by task kworker/u16:0/12
[ 23.307898][ T12]
[ 23.308047][ T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 23.308057][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.308062][ T12] Workqueue: netns cleanup_net
[ 23.308074][ T12] Call Trace:
[ 23.308077][ T12]
[ 23.308081][ T12] dump_stack_lvl+0x82/0xc0
[ 23.308089][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 23.308099][ T12] ? kobject_put+0xbb/0xd0
[ 23.308105][ T12] print_report+0xb4/0x270
[ 23.308110][ T12] ? kobject_put+0xbb/0xd0
[ 23.308114][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 23.308120][ T12] ? kobject_put+0xbb/0xd0
[ 23.308124][ T12] kasan_report+0xca/0x100
[ 23.308131][ T12] ? kobject_put+0xbb/0xd0
[ 23.308140][ T12] kobject_put+0xbb/0xd0
[ 23.308145][ T12] netdev_run_todo+0x5f0/0xc60
[ 23.308154][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 23.308160][ T12] ? generic_xdp_install+0x410/0x410
[ 23.308165][ T12] ? __lock_release+0x5d/0x170
[ 23.308176][ T12] ? bond_net_exit_rtnl+0xcf/0x2f0
[ 23.308188][ T12] ops_undo_list+0x714/0x890
[ 23.308198][ T12] ? netns_get+0x110/0x110
[ 23.308202][ T12] ? cleanup_net+0x2d6/0x830
[ 23.308213][ T12] cleanup_net+0x3b2/0x830
[ 23.308220][ T12] ? net_passive_dec+0x190/0x190
[ 23.308228][ T12] ? rcu_is_watching+0x12/0xb0
[ 23.308237][ T12] process_one_work+0xe35/0x1650
[ 23.308250][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 23.308260][ T12] ? assign_work+0x168/0x240
[ 23.308268][ T12] worker_thread+0x591/0xcf0
[ 23.308279][ T12] ? rescuer_thread+0xd10/0xd10
[ 23.308285][ T12] kthread+0x37b/0x5f0
[ 23.308292][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.308296][ T12] ? ret_from_fork+0x1b/0x270
[ 23.308308][ T12] ? __lock_release+0x5d/0x170
[ 23.308315][ T12] ? rcu_is_watching+0x12/0xb0
[ 23.308320][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.308326][ T12] ret_from_fork+0x1db/0x270
[ 23.308332][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.308337][ T12] ret_from_fork_asm+0x11/0x20
[ 23.308355][ T12]
[ 23.308357][ T12]
[ 23.318764][ T12] Allocated by task 244:
[ 23.318971][ T12] kasan_save_stack+0x24/0x40
[ 23.319243][ T12] kasan_save_track+0x14/0x30
[ 23.319507][ T12] __kasan_kmalloc+0x7b/0x90
[ 23.319772][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 23.320038][ T12] alloc_netdev_mqs+0x7d/0x1310
[ 23.320303][ T12] sit_init_net+0x169/0x550
[ 23.320582][ T12] ops_init+0x189/0x550
[ 23.320782][ T12] setup_net+0xf1/0x380
[ 23.320976][ T12] copy_net_ns+0x21a/0x380
[ 23.321230][ T12] create_new_namespaces+0x35f/0x900
[ 23.321489][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 23.321752][ T12] ksys_unshare+0x2a3/0x660
[ 23.322020][ T12] __x64_sys_unshare+0x31/0x40
[ 23.322288][ T12] do_syscall_64+0xc1/0xfd0
[ 23.322554][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 23.322894][ T12]
[ 23.323025][ T12] Freed by task 12:
[ 23.323223][ T12] kasan_save_stack+0x24/0x40
[ 23.323495][ T12] kasan_save_track+0x14/0x30
[ 23.323761][ T12] __kasan_save_free_info+0x3b/0x60
[ 23.324027][ T12] __kasan_slab_free+0x3f/0x60
[ 23.324289][ T12] kfree+0x21d/0x540
[ 23.324484][ T12] device_release+0x9c/0x210
[ 23.324746][ T12] kobject_cleanup+0xfe/0x360
[ 23.325017][ T12] netdev_run_todo+0x81f/0xc60
[ 23.325289][ T12] ops_undo_list+0x714/0x890
[ 23.325554][ T12] cleanup_net+0x3b2/0x830
[ 23.325829][ T12] process_one_work+0xe35/0x1650
[ 23.326094][ T12] worker_thread+0x591/0xcf0
[ 23.326351][ T12] kthread+0x37b/0x5f0
[ 23.326552][ T12] ret_from_fork+0x1db/0x270
[ 23.326824][ T12] ret_from_fork_asm+0x11/0x20
[ 23.327085][ T12]
[ 23.327223][ T12] The buggy address belongs to the object at ffff888001e14000
[ 23.327223][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 23.327846][ T12] The buggy address is located 1692 bytes inside of
[ 23.327846][ T12] freed 4096-byte region [ffff888001e14000, ffff888001e15000)
[ 23.328466][ T12]
[ 23.328596][ T12] The buggy address belongs to the physical page:
[ 23.328944][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1e10
[ 23.329416][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 23.329816][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 23.330153][ T12] page_type: f5(slab)
[ 23.330371][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000210810 ffffea0000175010
[ 23.330853][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 23.331329][ T12] head: 0080000000000040 ffff888001043700 ffffea0000210810 ffffea0000175010
[ 23.331810][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 23.332271][ T12] head: 0080000000000003 ffffea0000078401 00000000ffffffff 00000000ffffffff
[ 23.332739][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 23.333195][ T12] page dumped because: kasan: bad access detected
[ 23.333507][ T12]
[ 23.333637][ T12] Memory state around the buggy address:
[ 23.333892][ T12] ffff888001e14580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.334306][ T12] ffff888001e14600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.334690][ T12] >ffff888001e14680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.335074][ T12] ^
[ 23.335355][ T12] ffff888001e14700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.335745][ T12] ffff888001e14780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 23.336130][ T12] ==================================================================
[ 23.336584][ T12] Disabling lock debugging due to kernel taint
[ 23.336933][ T12] ------------[ cut here ]------------
[ 23.337196][ T12] refcount_t: underflow; use-after-free.
[ 23.337968][ T12] WARNING: CPU: 2 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 23.338481][ T12] Modules linked in:
[ 23.338713][ T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 23.339328][ T12] Tainted: [B]=BAD_PAGE
[ 23.339578][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.339935][ T12] Workqueue: netns cleanup_net
[ 23.340256][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 23.340637][ T12] Code: a2 b5 02 80 fb 01 0f 87 db 6e d8 fe 83 e3 01 0f 85 51 ff ff ff c6 05 c2 a2 b5 02 01 90 48 c7 c7 60 a8 05 a2 e8 72 c3 17 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 20 69 a0 ff e9 ba fe ff ff
[ 23.341586][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 23.341939][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 23.342371][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 23.342786][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff453e134
[ 23.343202][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 23.343635][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 23.344058][ T12] FS: 0000000000000000(0000) GS:ffff888092481000(0000) knlGS:0000000000000000
[ 23.344553][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 23.344907][ T12] CR2: 000055d6a1deb138 CR3: 0000000032f35001 CR4: 0000000000772ef0
[ 23.345336][ T12] PKRU: 55555554
[ 23.345565][ T12] Call Trace:
[ 23.345781][ T12]
[ 23.345943][ T12] netdev_run_todo+0x5f0/0xc60
[ 23.346265][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 23.346558][ T12] ? generic_xdp_install+0x410/0x410
[ 23.346845][ T12] ? __lock_release+0x5d/0x170
[ 23.347157][ T12] ? bond_net_exit_rtnl+0xcf/0x2f0
[ 23.347462][ T12] ops_undo_list+0x714/0x890
[ 23.347752][ T12] ? netns_get+0x110/0x110
[ 23.348048][ T12] ? cleanup_net+0x2d6/0x830
[ 23.348347][ T12] cleanup_net+0x3b2/0x830
[ 23.348627][ T12] ? net_passive_dec+0x190/0x190
[ 23.348912][ T12] ? rcu_is_watching+0x12/0xb0
[ 23.349196][ T12] process_one_work+0xe35/0x1650
[ 23.349502][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 23.349799][ T12] ? assign_work+0x168/0x240
[ 23.350100][ T12] worker_thread+0x591/0xcf0
[ 23.350442][ T12] ? rescuer_thread+0xd10/0xd10
[ 23.350723][ T12] kthread+0x37b/0x5f0
[ 23.351292][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.351580][ T12] ? ret_from_fork+0x1b/0x270
[ 23.351863][ T12] ? __lock_release+0x5d/0x170
[ 23.352148][ T12] ? rcu_is_watching+0x12/0xb0
[ 23.352440][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.352882][ T12] ret_from_fork+0x1db/0x270
[ 23.353233][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 23.353692][ T12] ret_from_fork_asm+0x11/0x20
[ 23.354160][ T12]
[ 23.354553][ T12] irq event stamp: 20753
[ 23.354774][ T12] hardirqs last enabled at (20753): [] irqentry_exit+0x3b/0x80
[ 23.355448][ T12] hardirqs last disabled at (20752): [] handle_softirqs+0x47f/0x610
[ 23.356103][ T12] softirqs last enabled at (20424): [] handle_softirqs+0x352/0x610
[ 23.356593][ T12] softirqs last disabled at (19865): [] irq_exit_rcu+0xab/0x100
[ 23.357237][ T12] ---[ end trace 0000000000000000 ]---
[ 23.380330][ T12] bond0: (slave veth1): Releasing backup interface
[ 23.389980][ T12] bond0: (slave veth0): Releasing backup interface
[ 23.449249][ T12] bond0 (unregistering): Released all slaves