[ 18.118949][ T284] GACT probability NOT on
[ 20.283816][ T68] ==================================================================
[ 20.284153][ T68] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 20.284435][ T68] Read of size 1 at addr ffff888004c8c6c4 by task kworker/u16:1/68
[ 20.284698][ T68]
[ 20.284800][ T68] CPU: 2 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 20.284806][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.284810][ T68] Workqueue: netns cleanup_net
[ 20.284820][ T68] Call Trace:
[ 20.284822][ T68]
[ 20.284826][ T68] dump_stack_lvl+0x82/0xc0
[ 20.284832][ T68] print_address_description.constprop.0+0x2c/0x3a0
[ 20.284840][ T68] ? kobject_put+0xbb/0xd0
[ 20.284844][ T68] print_report+0xb4/0x270
[ 20.284848][ T68] ? kobject_put+0xbb/0xd0
[ 20.284851][ T68] ? kasan_addr_to_slab+0x21/0x70
[ 20.284855][ T68] ? kobject_put+0xbb/0xd0
[ 20.284858][ T68] kasan_report+0xca/0x100
[ 20.284862][ T68] ? kobject_put+0xbb/0xd0
[ 20.284867][ T68] kobject_put+0xbb/0xd0
[ 20.284871][ T68] netdev_run_todo+0x5f0/0xc60
[ 20.284877][ T68] ? dev_ingress_queue_create+0x190/0x190
[ 20.284881][ T68] ? generic_xdp_install+0x410/0x410
[ 20.284888][ T68] ops_undo_list+0x714/0x890
[ 20.284893][ T68] ? rtnl_net_dumpid_one+0x270/0x270
[ 20.284896][ T68] ? cleanup_net+0x2d6/0x8b0
[ 20.284902][ T68] cleanup_net+0x3b2/0x8b0
[ 20.284907][ T68] ? net_passive_dec+0x190/0x190
[ 20.284911][ T68] ? rcu_is_watching+0x12/0xb0
[ 20.284920][ T68] process_one_work+0xe35/0x1650
[ 20.284930][ T68] ? pwq_dec_nr_in_flight+0x550/0x550
[ 20.284936][ T68] ? assign_work+0x168/0x240
[ 20.284940][ T68] worker_thread+0x591/0xcf0
[ 20.284946][ T68] ? rescuer_thread+0xd10/0xd10
[ 20.284950][ T68] kthread+0x37b/0x5f0
[ 20.284954][ T68] ? kthread_is_per_cpu+0xc0/0xc0
[ 20.284957][ T68] ? ret_from_fork+0x1b/0x270
[ 20.284964][ T68] ? __lock_release+0x5d/0x170
[ 20.284971][ T68] ? rcu_is_watching+0x12/0xb0
[ 20.284975][ T68] ? kthread_is_per_cpu+0xc0/0xc0
[ 20.284981][ T68] ret_from_fork+0x1db/0x270
[ 20.284985][ T68] ? kthread_is_per_cpu+0xc0/0xc0
[ 20.284990][ T68] ret_from_fork_asm+0x11/0x20
[ 20.285002][ T68]
[ 20.285004][ T68]
[ 20.291828][ T68] Allocated by task 269:
[ 20.291962][ T68] kasan_save_stack+0x24/0x40
[ 20.292172][ T68] kasan_save_track+0x14/0x30
[ 20.292360][ T68] __kasan_kmalloc+0x7b/0x90
[ 20.292545][ T68] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 20.292730][ T68] alloc_netdev_mqs+0x7d/0x1370
[ 20.292904][ T68] ip6_tnl_init_net+0x102/0x3f0
[ 20.293083][ T68] ops_init+0x189/0x550
[ 20.293236][ T68] setup_net+0xf1/0x380
[ 20.293367][ T68] copy_net_ns+0x253/0x510
[ 20.293535][ T68] create_new_namespaces+0x35f/0x900
[ 20.293736][ T68] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 20.293917][ T68] ksys_unshare+0x2be/0x6e0
[ 20.294098][ T68] __x64_sys_unshare+0x31/0x40
[ 20.294285][ T68] do_syscall_64+0xc1/0xfd0
[ 20.294456][ T68] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 20.294687][ T68]
[ 20.294777][ T68] Freed by task 68:
[ 20.294905][ T68] kasan_save_stack+0x24/0x40
[ 20.295081][ T68] kasan_save_track+0x14/0x30
[ 20.295275][ T68] __kasan_save_free_info+0x3b/0x60
[ 20.295455][ T68] __kasan_slab_free+0x3f/0x60
[ 20.295623][ T68] kfree+0x21d/0x540
[ 20.295754][ T68] device_release+0x9c/0x210
[ 20.295920][ T68] kobject_cleanup+0xfe/0x360
[ 20.296100][ T68] netdev_run_todo+0x81f/0xc60
[ 20.296267][ T68] ops_undo_list+0x714/0x890
[ 20.296435][ T68] cleanup_net+0x3b2/0x8b0
[ 20.296620][ T68] process_one_work+0xe35/0x1650
[ 20.296813][ T68] worker_thread+0x591/0xcf0
[ 20.296980][ T68] kthread+0x37b/0x5f0
[ 20.297114][ T68] ret_from_fork+0x1db/0x270
[ 20.297295][ T68] ret_from_fork_asm+0x11/0x20
[ 20.297467][ T68]
[ 20.297564][ T68] The buggy address belongs to the object at ffff888004c8c000
[ 20.297564][ T68] which belongs to the cache kmalloc-4k of size 4096
[ 20.297977][ T68] The buggy address is located 1732 bytes inside of
[ 20.297977][ T68] freed 4096-byte region [ffff888004c8c000, ffff888004c8d000)
[ 20.298407][ T68]
[ 20.298506][ T68] The buggy address belongs to the physical page:
[ 20.298762][ T68] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4c88
[ 20.299068][ T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 20.299367][ T68] flags: 0x80000000000040(head|node=0|zone=1)
[ 20.299597][ T68] page_type: f5(slab)
[ 20.299745][ T68] raw: 0080000000000040 ffff888001043700 ffffea0000137210 ffffea00001dbc10
[ 20.300064][ T68] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 20.300382][ T68] head: 0080000000000040 ffff888001043700 ffffea0000137210 ffffea00001dbc10
[ 20.300718][ T68] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 20.301030][ T68] head: 0080000000000003 ffffea0000132201 00000000ffffffff 00000000ffffffff
[ 20.301363][ T68] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 20.301674][ T68] page dumped because: kasan: bad access detected
[ 20.301900][ T68]
[ 20.302018][ T68] Memory state around the buggy address:
[ 20.302207][ T68] ffff888004c8c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.302460][ T68] ffff888004c8c600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.302733][ T68] >ffff888004c8c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.302981][ T68] ^
[ 20.303239][ T68] ffff888004c8c700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.303508][ T68] ffff888004c8c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 20.303771][ T68] ==================================================================
[ 20.304177][ T68] Disabling lock debugging due to kernel taint
[ 20.304530][ T68] ------------[ cut here ]------------
[ 20.304716][ T68] refcount_t: underflow; use-after-free.
[ 20.304937][ T68] WARNING: CPU: 0 PID: 68 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 20.305256][ T68] Modules linked in: vxlan act_gact cls_flower sch_ingress
[ 20.305500][ T68] CPU: 0 UID: 0 PID: 68 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 20.305856][ T68] Tainted: [B]=BAD_PAGE
[ 20.305981][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.306198][ T68] Workqueue: netns cleanup_net
[ 20.306387][ T68] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 20.306586][ T68] 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 b0 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
[ 20.307164][ T68] RSP: 0018:ffffc90000497a08 EFLAGS: 00010282
[ 20.307372][ T68] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 20.307607][ T68] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 20.307842][ T68] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff6240934
[ 20.308093][ T68] R10: 0000000000000003 R11: ffffc90000497580 R12: 0000000000000001
[ 20.308336][ T68] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 20.308578][ T68] FS: 0000000000000000(0000) GS:ffff8880ba908000(0000) knlGS:0000000000000000
[ 20.308850][ T68] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 20.309063][ T68] CR2: 000055be34bbab00 CR3: 000000000afb3005 CR4: 0000000000772ef0
[ 20.309322][ T68] PKRU: 55555554
[ 20.309448][ T68] Call Trace:
[ 20.309569][ T68]
[ 20.309650][ T68] netdev_run_todo+0x5f0/0xc60
[ 20.309823][ T68] ? dev_ingress_queue_create+0x190/0x190
[ 20.309978][ T68] ? generic_xdp_install+0x410/0x410
[ 20.310159][ T68] ops_undo_list+0x714/0x890
[ 20.310324][ T68] ? rtnl_net_dumpid_one+0x270/0x270
[ 20.310503][ T68] ? cleanup_net+0x2d6/0x8b0
[ 20.310658][ T68] cleanup_net+0x3b2/0x8b0
[ 20.310810][ T68] ? net_passive_dec+0x190/0x190
[ 20.310966][ T68] ? rcu_is_watching+0x12/0xb0
[ 20.311154][ T68] process_one_work+0xe35/0x1650
[ 20.311322][ T68] ? pwq_dec_nr_in_flight+0x550/0x550
[ 20.311479][ T68] ? assign_work+0x168/0x240
[ 20.311639][ T68] worker_thread+0x591/0xcf0
[ 20.311803][ T68] ? rescuer_thread+0xd10/0xd10
[ 20.311956][ T68] kthread+0x37b/0x5f0
[ 20.312095][ T68] ? kthread_is_per_cpu+0xc0/0xc0
[ 20.312260][ T68] ? ret_from_fork+0x1b/0x270
[ 20.312416][ T68] ? __lock_release+0x5d/0x170
[ 20.312568][ T68] ? rcu_is_watching+0x12/0xb0
[ 20.312721][ T68] ? kthread_is_per_cpu+0xc0/0xc0
[ 20.312876][ T68] ret_from_fork+0x1db/0x270
[ 20.313035][ T68] ? kthread_is_per_cpu+0xc0/0xc0
[ 20.313207][ T68] ret_from_fork_asm+0x11/0x20
[ 20.313383][ T68]
[ 20.313505][ T68] irq event stamp: 14285
[ 20.313624][ T68] hardirqs last enabled at (14285): [] finish_task_switch.isra.0+0x245/0x960
[ 20.313937][ T68] hardirqs last disabled at (14284): [] __schedule+0x94a/0x1b10
[ 20.314239][ T68] softirqs last enabled at (14170): [] handle_softirqs+0x352/0x610
[ 20.314510][ T68] softirqs last disabled at (14005): [] irq_exit_rcu+0xab/0x100
[ 20.314775][ T68] ---[ end trace 0000000000000000 ]---