[ 19.435256][ T280] GACT probability NOT on
[ 77.547533][ T12] ==================================================================
[ 77.547911][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0
[ 77.548207][ T12] Read of size 1 at addr ffff888008b196c4 by task kworker/u16:0/12
[ 77.548477][ T12]
[ 77.548567][ T12] CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 77.548572][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 77.548576][ T12] Workqueue: netns cleanup_net
[ 77.548586][ T12] Call Trace:
[ 77.548588][ T12]
[ 77.548592][ T12] dump_stack_lvl+0x82/0xc0
[ 77.548600][ T12] print_address_description.constprop.0+0x2c/0x3a0
[ 77.548611][ T12] ? kobject_put+0xbb/0xd0
[ 77.548616][ T12] print_report+0xb4/0x270
[ 77.548620][ T12] ? kobject_put+0xbb/0xd0
[ 77.548623][ T12] ? kasan_addr_to_slab+0x21/0x70
[ 77.548628][ T12] ? kobject_put+0xbb/0xd0
[ 77.548631][ T12] kasan_report+0xca/0x100
[ 77.548635][ T12] ? kobject_put+0xbb/0xd0
[ 77.548641][ T12] kobject_put+0xbb/0xd0
[ 77.548644][ T12] netdev_run_todo+0x5f0/0xc60
[ 77.548651][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 77.548655][ T12] ? generic_xdp_install+0x410/0x410
[ 77.548658][ T12] ? net_generic+0xb1/0x1f0
[ 77.548667][ T12] ops_undo_list+0x714/0x890
[ 77.548673][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 77.548676][ T12] ? cleanup_net+0x2d6/0x8b0
[ 77.548682][ T12] cleanup_net+0x3b2/0x8b0
[ 77.548686][ T12] ? net_passive_dec+0x190/0x190
[ 77.548691][ T12] ? rcu_is_watching+0x12/0xb0
[ 77.548699][ T12] process_one_work+0xe35/0x1650
[ 77.548709][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 77.548715][ T12] ? assign_work+0x168/0x240
[ 77.548719][ T12] worker_thread+0x591/0xcf0
[ 77.548725][ T12] ? rescuer_thread+0xd10/0xd10
[ 77.548729][ T12] kthread+0x37b/0x5f0
[ 77.548734][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 77.548737][ T12] ? ret_from_fork+0x1b/0x270
[ 77.548742][ T12] ? __lock_release+0x5d/0x170
[ 77.548746][ T12] ? rcu_is_watching+0x12/0xb0
[ 77.548749][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 77.548753][ T12] ret_from_fork+0x1db/0x270
[ 77.548755][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 77.548758][ T12] ret_from_fork_asm+0x11/0x20
[ 77.548767][ T12]
[ 77.548768][ T12]
[ 77.556160][ T12] Allocated by task 261:
[ 77.556292][ T12] kasan_save_stack+0x24/0x40
[ 77.556569][ T12] kasan_save_track+0x14/0x30
[ 77.556747][ T12] __kasan_kmalloc+0x7b/0x90
[ 77.556919][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0
[ 77.557108][ T12] alloc_netdev_mqs+0x7d/0x1370
[ 77.557388][ T12] ip6_tnl_init_net+0x102/0x3f0
[ 77.557561][ T12] ops_init+0x189/0x550
[ 77.557719][ T12] setup_net+0xf1/0x380
[ 77.557854][ T12] copy_net_ns+0x253/0x510
[ 77.558136][ T12] create_new_namespaces+0x35f/0x900
[ 77.558318][ T12] unshare_nsproxy_namespaces+0x8a/0x1a0
[ 77.558502][ T12] ksys_unshare+0x2be/0x6e0
[ 77.558695][ T12] __x64_sys_unshare+0x31/0x40
[ 77.558966][ T12] do_syscall_64+0xc1/0xfd0
[ 77.559160][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 77.559386][ T12]
[ 77.559480][ T12] Freed by task 12:
[ 77.559615][ T12] kasan_save_stack+0x24/0x40
[ 77.559884][ T12] kasan_save_track+0x14/0x30
[ 77.560068][ T12] __kasan_save_free_info+0x3b/0x60
[ 77.560245][ T12] __kasan_slab_free+0x3f/0x60
[ 77.560417][ T12] kfree+0x21d/0x540
[ 77.560646][ T12] device_release+0x9c/0x210
[ 77.560826][ T12] kobject_cleanup+0xfe/0x360
[ 77.561001][ T12] netdev_run_todo+0x81f/0xc60
[ 77.561186][ T12] ops_undo_list+0x714/0x890
[ 77.561449][ T12] cleanup_net+0x3b2/0x8b0
[ 77.561633][ T12] process_one_work+0xe35/0x1650
[ 77.561808][ T12] worker_thread+0x591/0xcf0
[ 77.561976][ T12] kthread+0x37b/0x5f0
[ 77.562203][ T12] ret_from_fork+0x1db/0x270
[ 77.562384][ T12] ret_from_fork_asm+0x11/0x20
[ 77.562579][ T12]
[ 77.562677][ T12] The buggy address belongs to the object at ffff888008b19000
[ 77.562677][ T12] which belongs to the cache kmalloc-4k of size 4096
[ 77.563204][ T12] The buggy address is located 1732 bytes inside of
[ 77.563204][ T12] freed 4096-byte region [ffff888008b19000, ffff888008b1a000)
[ 77.563661][ T12]
[ 77.563852][ T12] The buggy address belongs to the physical page:
[ 77.564105][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8b18
[ 77.564430][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
[ 77.564797][ T12] flags: 0x80000000000040(head|node=0|zone=1)
[ 77.565030][ T12] page_type: f5(slab)
[ 77.565196][ T12] raw: 0080000000000040 ffff888001043700 ffffea00001d6210 ffffea000022ec10
[ 77.565632][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 77.565931][ T12] head: 0080000000000040 ffff888001043700 ffffea00001d6210 ffffea000022ec10
[ 77.566296][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000
[ 77.566690][ T12] head: 0080000000000003 ffffea000022c601 00000000ffffffff 00000000ffffffff
[ 77.566992][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 77.567388][ T12] page dumped because: kasan: bad access detected
[ 77.567580][ T12]
[ 77.567678][ T12] Memory state around the buggy address:
[ 77.567830][ T12] ffff888008b19580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 77.568164][ T12] ffff888008b19600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 77.568393][ T12] >ffff888008b19680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 77.568742][ T12] ^
[ 77.568950][ T12] ffff888008b19700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 77.569208][ T12] ffff888008b19780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[ 77.569540][ T12] ==================================================================
[ 77.569926][ T12] Disabling lock debugging due to kernel taint
[ 77.570207][ T12] ------------[ cut here ]------------
[ 77.570394][ T12] refcount_t: underflow; use-after-free.
[ 77.570585][ T12] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 77.571532][ T12] Modules linked in: act_gact cls_flower sch_ingress
[ 77.571790][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 77.572177][ T12] Tainted: [B]=BAD_PAGE
[ 77.572298][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 77.572545][ T12] Workqueue: netns cleanup_net
[ 77.572793][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 77.573083][ 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 05 8f 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
[ 77.573833][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282
[ 77.574104][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 77.574405][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 77.574730][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff2000934
[ 77.575053][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001
[ 77.575329][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 77.575606][ T12] FS: 0000000000000000(0000) GS:ffff8880dbb08000(0000) knlGS:0000000000000000
[ 77.575945][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 77.576205][ T12] CR2: 00007ffec793dcb8 CR3: 0000000068d49002 CR4: 0000000000772ef0
[ 77.576546][ T12] PKRU: 55555554
[ 77.576733][ T12] Call Trace:
[ 77.576875][ T12]
[ 77.576968][ T12] netdev_run_todo+0x5f0/0xc60
[ 77.577147][ T12] ? dev_ingress_queue_create+0x190/0x190
[ 77.577341][ T12] ? generic_xdp_install+0x410/0x410
[ 77.577504][ T12] ? net_generic+0xb1/0x1f0
[ 77.577691][ T12] ops_undo_list+0x714/0x890
[ 77.577865][ T12] ? rtnl_net_dumpid_one+0x270/0x270
[ 77.578025][ T12] ? cleanup_net+0x2d6/0x8b0
[ 77.578187][ T12] cleanup_net+0x3b2/0x8b0
[ 77.578342][ T12] ? net_passive_dec+0x190/0x190
[ 77.578503][ T12] ? rcu_is_watching+0x12/0xb0
[ 77.578694][ T12] process_one_work+0xe35/0x1650
[ 77.578870][ T12] ? pwq_dec_nr_in_flight+0x550/0x550
[ 77.579035][ T12] ? assign_work+0x168/0x240
[ 77.579202][ T12] worker_thread+0x591/0xcf0
[ 77.579364][ T12] ? rescuer_thread+0xd10/0xd10
[ 77.579524][ T12] kthread+0x37b/0x5f0
[ 77.579660][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 77.579825][ T12] ? ret_from_fork+0x1b/0x270
[ 77.579995][ T12] ? __lock_release+0x5d/0x170
[ 77.580153][ T12] ? rcu_is_watching+0x12/0xb0
[ 77.580307][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 77.580492][ T12] ret_from_fork+0x1db/0x270
[ 77.580767][ T12] ? kthread_is_per_cpu+0xc0/0xc0
[ 77.580967][ T12] ret_from_fork_asm+0x11/0x20
[ 77.581178][ T12]
[ 77.581301][ T12] irq event stamp: 10865
[ 77.581463][ T12] hardirqs last enabled at (10865): [] finish_task_switch.isra.0+0x245/0x960
[ 77.581869][ T12] hardirqs last disabled at (10864): [] __schedule+0x94a/0x1b10
[ 77.582184][ T12] softirqs last enabled at (10512): [] handle_softirqs+0x352/0x610
[ 77.582580][ T12] softirqs last disabled at (10507): [] irq_exit_rcu+0xab/0x100
[ 77.582885][ T12] ---[ end trace 0000000000000000 ]---