[ 19.830936][ T290] veth0: renamed from veth-rt-1 [ 21.384080][ T299] veth0: renamed from veth-rt-2 [ 104.837989][ T12] ================================================================== [ 104.838448][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0 [ 104.838889][ T12] Read of size 1 at addr ffff8880053016c4 by task kworker/u16:0/12 [ 104.839300][ T12] [ 104.839448][ T12] CPU: 2 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full) [ 104.839456][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 104.839461][ T12] Workqueue: netns cleanup_net [ 104.839475][ T12] Call Trace: [ 104.839478][ T12] [ 104.839483][ T12] dump_stack_lvl+0x82/0xc0 [ 104.839495][ T12] print_address_description.constprop.0+0x2c/0x3a0 [ 104.839505][ T12] ? kobject_put+0xbb/0xd0 [ 104.839512][ T12] print_report+0xb4/0x270 [ 104.839517][ T12] ? kobject_put+0xbb/0xd0 [ 104.839521][ T12] ? kasan_addr_to_slab+0x21/0x70 [ 104.839527][ T12] ? kobject_put+0xbb/0xd0 [ 104.839531][ T12] kasan_report+0xca/0x100 [ 104.839537][ T12] ? kobject_put+0xbb/0xd0 [ 104.839545][ T12] kobject_put+0xbb/0xd0 [ 104.839550][ T12] netdev_run_todo+0x5f0/0xc60 [ 104.839559][ T12] ? dev_ingress_queue_create+0x190/0x190 [ 104.839565][ T12] ? generic_xdp_install+0x410/0x410 [ 104.839570][ T12] ? net_generic+0xb1/0x1f0 [ 104.839585][ T12] ops_undo_list+0x714/0x890 [ 104.839594][ T12] ? rtnl_net_dumpid_one+0x270/0x270 [ 104.839600][ T12] ? cleanup_net+0x2d6/0x8b0 [ 104.839610][ T12] cleanup_net+0x3b2/0x8b0 [ 104.839618][ T12] ? net_passive_dec+0x190/0x190 [ 104.839626][ T12] ? rcu_is_watching+0x12/0xb0 [ 104.839638][ T12] process_one_work+0xe35/0x1650 [ 104.839654][ T12] ? pwq_dec_nr_in_flight+0x550/0x550 [ 104.839665][ T12] ? assign_work+0x168/0x240 [ 104.839673][ T12] worker_thread+0x591/0xcf0 [ 104.839683][ T12] ? rescuer_thread+0xd10/0xd10 [ 104.839690][ T12] kthread+0x37b/0x5f0 [ 104.839697][ T12] ? kthread_is_per_cpu+0xc0/0xc0 [ 104.839702][ T12] ? ret_from_fork+0x1b/0x270 [ 104.839709][ T12] ? __lock_release+0x5d/0x170 [ 104.839715][ T12] ? rcu_is_watching+0x12/0xb0 [ 104.839721][ T12] ? kthread_is_per_cpu+0xc0/0xc0 [ 104.839727][ T12] ret_from_fork+0x1db/0x270 [ 104.839731][ T12] ? kthread_is_per_cpu+0xc0/0xc0 [ 104.839736][ T12] ret_from_fork_asm+0x11/0x20 [ 104.839753][ T12] [ 104.839756][ T12] [ 104.850851][ T12] Allocated by task 272: [ 104.851124][ T12] kasan_save_stack+0x24/0x40 [ 104.851386][ T12] kasan_save_track+0x14/0x30 [ 104.851623][ T12] __kasan_kmalloc+0x7b/0x90 [ 104.851914][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0 [ 104.852101][ T12] alloc_netdev_mqs+0x7d/0x1370 [ 104.852321][ T12] ip6_tnl_init_net+0x102/0x3f0 [ 104.852513][ T12] ops_init+0x189/0x550 [ 104.852660][ T12] setup_net+0xf1/0x380 [ 104.852807][ T12] copy_net_ns+0x253/0x510 [ 104.853168][ T12] create_new_namespaces+0x35f/0x900 [ 104.853586][ T12] unshare_nsproxy_namespaces+0x8a/0x1a0 [ 104.853882][ T12] ksys_unshare+0x2be/0x6e0 [ 104.854159][ T12] __x64_sys_unshare+0x31/0x40 [ 104.854442][ T12] do_syscall_64+0xc1/0xfd0 [ 104.854729][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 104.855089][ T12] [ 104.855246][ T12] Freed by task 12: [ 104.855616][ T12] kasan_save_stack+0x24/0x40 [ 104.855900][ T12] kasan_save_track+0x14/0x30 [ 104.856177][ T12] __kasan_save_free_info+0x3b/0x60 [ 104.856451][ T12] __kasan_slab_free+0x3f/0x60 [ 104.856878][ T12] kfree+0x21d/0x540 [ 104.857085][ T12] device_release+0x9c/0x210 [ 104.857365][ T12] kobject_cleanup+0xfe/0x360 [ 104.857639][ T12] netdev_run_todo+0x81f/0xc60 [ 104.858085][ T12] ops_undo_list+0x714/0x890 [ 104.858376][ T12] cleanup_net+0x3b2/0x8b0 [ 104.858644][ T12] process_one_work+0xe35/0x1650 [ 104.858902][ T12] worker_thread+0x591/0xcf0 [ 104.859342][ T12] kthread+0x37b/0x5f0 [ 104.859549][ T12] ret_from_fork+0x1db/0x270 [ 104.859828][ T12] ret_from_fork_asm+0x11/0x20 [ 104.860111][ T12] [ 104.860254][ T12] The buggy address belongs to the object at ffff888005301000 [ 104.860254][ T12] which belongs to the cache kmalloc-4k of size 4096 [ 104.861059][ T12] The buggy address is located 1732 bytes inside of [ 104.861059][ T12] freed 4096-byte region [ffff888005301000, ffff888005302000) [ 104.861888][ T12] [ 104.862023][ T12] The buggy address belongs to the physical page: [ 104.862335][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5300 [ 104.862810][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 104.863382][ T12] flags: 0x80000000000040(head|node=0|zone=1) [ 104.863727][ T12] page_type: f5(slab) [ 104.863936][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000096410 ffffea0000251610 [ 104.864595][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 104.865096][ T12] head: 0080000000000040 ffff888001043700 ffffea0000096410 ffffea0000251610 [ 104.865764][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 104.866257][ T12] head: 0080000000000003 ffffea000014c001 00000000ffffffff 00000000ffffffff [ 104.866911][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 104.867406][ T12] page dumped because: kasan: bad access detected [ 104.867745][ T12] [ 104.867883][ T12] Memory state around the buggy address: [ 104.868315][ T12] ffff888005301580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 104.868716][ T12] ffff888005301600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 104.869117][ T12] >ffff888005301680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 104.869668][ T12] ^ [ 104.870001][ T12] ffff888005301700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 104.870393][ T12] ffff888005301780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 104.870922][ T12] ================================================================== [ 104.871456][ T12] Disabling lock debugging due to kernel taint [ 104.872742][ T12] ------------[ cut here ]------------ [ 104.873575][ T12] refcount_t: underflow; use-after-free. [ 104.874642][ T12] WARNING: CPU: 1 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0 [ 104.875019][ T12] Modules linked in: [ 104.875167][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full) [ 104.876053][ T12] Tainted: [B]=BAD_PAGE [ 104.876256][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 104.876575][ T12] Workqueue: netns cleanup_net [ 104.876846][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0 [ 104.877171][ 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 65 9a 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 [ 104.878169][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282 [ 104.878518][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 104.878909][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001 [ 104.879314][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff36c0934 [ 104.879735][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001 [ 104.880134][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100 [ 104.880525][ T12] FS: 0000000000000000(0000) GS:ffff8880ca188000(0000) knlGS:0000000000000000 [ 104.881005][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 104.881352][ T12] CR2: 0000560fce4d7dec CR3: 0000000072749001 CR4: 0000000000772ef0 [ 104.881763][ T12] PKRU: 55555554 [ 104.881961][ T12] Call Trace: [ 104.882163][ T12] [ 104.882302][ T12] netdev_run_todo+0x5f0/0xc60 [ 104.882642][ T12] ? dev_ingress_queue_create+0x190/0x190 [ 104.882915][ T12] ? generic_xdp_install+0x410/0x410 [ 104.883165][ T12] ? net_generic+0xb1/0x1f0 [ 104.883426][ T12] ops_undo_list+0x714/0x890 [ 104.883701][ T12] ? rtnl_net_dumpid_one+0x270/0x270 [ 104.883955][ T12] ? cleanup_net+0x2d6/0x8b0 [ 104.884221][ T12] cleanup_net+0x3b2/0x8b0 [ 104.884481][ T12] ? net_passive_dec+0x190/0x190 [ 104.884755][ T12] ? rcu_is_watching+0x12/0xb0 [ 104.885012][ T12] process_one_work+0xe35/0x1650 [ 104.885286][ T12] ? pwq_dec_nr_in_flight+0x550/0x550 [ 104.885567][ T12] ? assign_work+0x168/0x240 [ 104.885829][ T12] worker_thread+0x591/0xcf0 [ 104.886090][ T12] ? rescuer_thread+0xd10/0xd10 [ 104.886357][ T12] kthread+0x37b/0x5f0 [ 104.886565][ T12] ? kthread_is_per_cpu+0xc0/0xc0 [ 104.886844][ T12] ? ret_from_fork+0x1b/0x270 [ 104.887094][ T12] ? __lock_release+0x5d/0x170 [ 104.887351][ T12] ? rcu_is_watching+0x12/0xb0 [ 104.887643][ T12] ? kthread_is_per_cpu+0xc0/0xc0 [ 104.887821][ T12] ret_from_fork+0x1db/0x270 [ 104.888015][ T12] ? kthread_is_per_cpu+0xc0/0xc0 [ 104.888279][ T12] ret_from_fork_asm+0x11/0x20 [ 104.888483][ T12] [ 104.888625][ T12] irq event stamp: 18185 [ 104.888843][ T12] hardirqs last enabled at (18185): [] irqentry_exit+0x3b/0x80 [ 104.889169][ T12] hardirqs last disabled at (18184): [] handle_softirqs+0x47f/0x610 [ 104.889466][ T12] softirqs last enabled at (18096): [] handle_softirqs+0x352/0x610 [ 104.889764][ T12] softirqs last disabled at (18091): [] irq_exit_rcu+0xab/0x100 [ 104.890066][ T12] ---[ end trace 0000000000000000 ]---