[ 16.735451][ T12] ==================================================================
[ 16.735902][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 16.736268][ T12] Read of size 1 at addr ffff888007919694 by task kworker/u16:0/12
[ 16.736635][ T12]
[ 16.736778][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.736785][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.736789][ T12] Workqueue: netns cleanup_net
[ 16.736798][ T12] Call Trace:
[ 16.736801][ T12]
[ 16.736805][ T12] dump_stack_lvl+0x82/0xc0
[ 16.736812][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 16.736824][ T12] ? kobject_put+0xbb/0xd0
[ 16.736830][ T12] print_report+0xb4/0x270
[ 16.736836][ T12] ? kobject_put+0xbb/0xd0
[ 16.736839][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 16.736845][ T12] ? kobject_put+0xbb/0xd0
[ 16.736850][ T12] kasan_report+0xca/0x100
[ 16.736857][ T12] ? kobject_put+0xbb/0xd0
[ 16.736866][ T12] kobject_put+0xbb/0xd0
[ 16.736871][ T12] netdev_run_todo+0x5f0/0xc60
[ 16.736879][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 16.736886][ T12] ? generic_xdp_install+0x410/0x410
[ 16.736898][ T12] ops_undo_list+0x714/0x890
[ 16.736906][ T12] ? netns_get+0x110/0x110
[ 16.736910][ T12] ? cleanup_net+0x2d6/0x830
[ 16.736919][ T12] cleanup_net+0x3b2/0x830
[ 16.736925][ T12] ? net_passive_dec+0x190/0x190
[ 16.736932][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.736940][ T12] process_one_work+0xe35/0x1650
[ 16.736952][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 16.736963][ T12] ? assign_work+0x168/0x240
[ 16.736968][ T12] worker_thread+0x591/0xcf0
[ 16.736978][ T12] ? rescuer_thread+0xd10/0xd10
[ 16.736984][ T12] kthread+0x37b/0x5f0
[ 16.736990][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.736993][ T12] ? ret_from_fork+0x1b/0x270
[ 16.737000][ T12] ? __lock_release+0x5d/0x170
[ 16.737008][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.737013][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.737019][ T12] ret_from_fork+0x1db/0x270
[ 16.737023][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.737028][ T12] ret_from_fork_asm+0x11/0x20
[ 16.737042][ T12]
[ 16.737044][ T12]
[ 16.746646][ T12] Allocated by task 228:
[ 16.746869][ T12] kasan_save_stack+0x24/0x40
[ 16.747053][ T12] kasan_save_track+0x14/0x30
[ 16.747239][ T12] __kasan_kmalloc+0x7b/0x90
[ 16.747521][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 16.747981][ T12] alloc_netdev_mqs+0x7d/0x1310
[ 16.748254][ T12] sit_init_net+0x169/0x550
[ 16.748535][ T12] ops_init+0x189/0x550
[ 16.748743][ T12] setup_net+0xf1/0x380
[ 16.748951][ T12] copy_net_ns+0x21a/0x380
[ 16.749401][ T12] create_new_namespaces+0x35f/0x900
[ 16.749678][ T12] unshare_nsproxy_namespaces+0x89/0x120
[ 16.749960][ T12] ksys_unshare+0x2a3/0x660
[ 16.750238][ T12] __x64_sys_unshare+0x31/0x40
[ 16.750529][ T12] do_syscall_64+0xc1/0xfd0
[ 16.750802][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.751145][ T12]
[ 16.751278][ T12] Freed by task 12:
[ 16.751467][ T12] kasan_save_stack+0x24/0x40
[ 16.751724][ T12] kasan_save_track+0x14/0x30
[ 16.751984][ T12] __kasan_save_free_info+0x3b/0x60
[ 16.752242][ T12] __kasan_slab_free+0x3f/0x60
[ 16.752678][ T12] kfree+0x21d/0x540
[ 16.752878][ T12] device_release+0x9c/0x210
[ 16.753139][ T12] kobject_cleanup+0xfe/0x360
[ 16.753394][ T12] netdev_run_todo+0x81f/0xc60
[ 16.753827][ T12] ops_undo_list+0x714/0x890
[ 16.754097][ T12] cleanup_net+0x3b2/0x830
[ 16.754362][ T12] process_one_work+0xe35/0x1650
[ 16.754619][ T12] worker_thread+0x591/0xcf0
[ 16.755048][ T12] kthread+0x37b/0x5f0
[ 16.755244][ T12] ret_from_fork+0x1db/0x270
[ 16.755504][ T12] ret_from_fork_asm+0x11/0x20
[ 16.755761][ T12]
[ 16.755899][ T12] The buggy address belongs to the object at ffff888007919000
[ 16.755899][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 16.756709][ T12] The buggy address is located 1684 bytes inside of
[ 16.756709][ T12] freed 4096-byte region [ffff888007919000, ffff88800791a000)
[ 16.757354][ T12]
[ 16.757485][ T12] The buggy address belongs to the physical page:
[ 16.757801][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7918
[ 16.758137][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 16.758482][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 16.758690][ T12] page_type: f5(slab)
[ 16.758817][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000242410 ffffea0000128410
[ 16.759189][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 16.759474][ T12] head: 0080000000000040 ffff888001043700 ffffea0000242410 ffffea0000128410
[ 16.759849][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 16.760133][ T12] head: 0080000000000003 ffffea00001e4601 00000000ffffffff 00000000ffffffff
[ 16.760533][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 16.760812][ T12] page dumped because: kasan: bad access detected
[ 16.761000][ T12]
[ 16.761076][ T12] Memory state around the buggy address:
[ 16.761379][ T12] ffff888007919580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.761605][ T12] ffff888007919600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.761832][ T12] >ffff888007919680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.762216][ T12] ^
[ 16.762463][ T12] ffff888007919700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.762842][ T12] ffff888007919780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 16.763432][ T12] ==================================================================
[ 16.765586][ T12] Disabling lock debugging due to kernel taint
[ 16.765819][ T12] ------------[ cut here ]------------
[ 16.765960][ T12] refcount_t: underflow; use-after-free.
[ 16.766143][ T12] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.766973][ T12] Modules linked in: veth
[ 16.767110][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.767502][ T12] Tainted: [B]=BAD_PAGE
[ 16.767621][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.767834][ T12] Workqueue: netns cleanup_net
[ 16.767999][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.768193][ T12] Code: 48 92 02 80 fb 01 0f 87 cb 7d d9 fe 83 e3 01 0f 85 51 ff ff ff c6 05 75 48 92 02 01 90 48 c7 c7 a0 8d 45 86 e8 42 93 18 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 c0 37 a1 ff e9 ba fe ff ff
[ 16.768763][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 16.768962][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.769190][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.769444][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff0dbe134
[ 16.769672][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 16.769900][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.770130][ T12] FS: 0000000000000000(0000) GS:ffff8880ae010000(0000) knlGS:0000000000000000
[ 16.770420][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.770611][ T12] CR2: 00007f2a2b243000 CR3: 0000000033135004 CR4: 0000000000772ef0
[ 16.770855][ T12] PKRU: 55555554
[ 16.770970][ T12] Call Trace:
[ 16.771092][ T12]
[ 16.771172][ T12] netdev_run_todo+0x5f0/0xc60
[ 16.771366][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 16.771522][ T12] ? generic_xdp_install+0x410/0x410
[ 16.771768][ T12] ops_undo_list+0x714/0x890
[ 16.771919][ T12] ? netns_get+0x110/0x110
[ 16.772067][ T12] ? cleanup_net+0x2d6/0x830
[ 16.772224][ T12] cleanup_net+0x3b2/0x830
[ 16.772408][ T12] ? net_passive_dec+0x190/0x190
[ 16.772570][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.772742][ T12] process_one_work+0xe35/0x1650
[ 16.772898][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 16.773132][ T12] ? assign_work+0x168/0x240
[ 16.773318][ T12] worker_thread+0x591/0xcf0
[ 16.773469][ T12] ? rescuer_thread+0xd10/0xd10
[ 16.773619][ T12] kthread+0x37b/0x5f0
[ 16.773830][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.773999][ T12] ? ret_from_fork+0x1b/0x270
[ 16.774161][ T12] ? __lock_release+0x5d/0x170
[ 16.774350][ T12] ? rcu_is_watching+0x12/0xb0
[ 16.774590][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.774782][ T12] ret_from_fork+0x1db/0x270
[ 16.774939][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 16.775097][ T12] ret_from_fork_asm+0x11/0x20
[ 16.775365][ T12]
[ 16.775484][ T12] irq event stamp: 2655
[ 16.775601][ T12] hardirqs last enabled at (2655): [] finish_task_switch.isra.0+0x245/0x960
[ 16.775925][ T12] hardirqs last disabled at (2654): [] __schedule+0x94a/0x1b10
[ 16.776319][ T12] softirqs last enabled at (2574): [] handle_softirqs+0x352/0x610
[ 16.776590][ T12] softirqs last disabled at (2563): [] irq_exit_rcu+0xab/0x100
[ 16.776953][ T12] ---[ end trace 0000000000000000 ]---