[ 17.155004][ T269] ip (269) used greatest stack depth: 24528 bytes left [ 18.022603][ T274] ip (274) used greatest stack depth: 24168 bytes left [ 26.216369][ T324] ip (324) used greatest stack depth: 23984 bytes left [ 130.769019][ T12] ================================================================== [ 130.769317][ T12] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0 [ 130.769592][ T12] Read of size 1 at addr ffff888008c796c4 by task kworker/u16:0/12 [ 130.769839][ T12] [ 130.769920][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full) [ 130.769926][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 130.769929][ T12] Workqueue: netns cleanup_net [ 130.769939][ T12] Call Trace: [ 130.769941][ T12] [ 130.769944][ T12] dump_stack_lvl+0x82/0xc0 [ 130.769950][ T12] print_address_description.constprop.0+0x2c/0x3a0 [ 130.769959][ T12] ? kobject_put+0xbb/0xd0 [ 130.769963][ T12] print_report+0xb4/0x270 [ 130.769966][ T12] ? kobject_put+0xbb/0xd0 [ 130.769969][ T12] ? kasan_addr_to_slab+0x21/0x70 [ 130.769973][ T12] ? kobject_put+0xbb/0xd0 [ 130.769976][ T12] kasan_report+0xca/0x100 [ 130.769980][ T12] ? kobject_put+0xbb/0xd0 [ 130.769985][ T12] kobject_put+0xbb/0xd0 [ 130.769989][ T12] netdev_run_todo+0x5f0/0xc60 [ 130.769997][ T12] ? dev_ingress_queue_create+0x190/0x190 [ 130.770000][ T12] ? generic_xdp_install+0x410/0x410 [ 130.770003][ T12] ? net_generic+0xb1/0x1f0 [ 130.770013][ T12] ops_undo_list+0x714/0x890 [ 130.770019][ T12] ? rtnl_net_dumpid_one+0x270/0x270 [ 130.770022][ T12] ? cleanup_net+0x2d6/0x8b0 [ 130.770028][ T12] cleanup_net+0x3b2/0x8b0 [ 130.770032][ T12] ? net_passive_dec+0x190/0x190 [ 130.770037][ T12] ? rcu_is_watching+0x12/0xb0 [ 130.770046][ T12] process_one_work+0xe35/0x1650 [ 130.770057][ T12] ? pwq_dec_nr_in_flight+0x550/0x550 [ 130.770063][ T12] ? assign_work+0x168/0x240 [ 130.770067][ T12] worker_thread+0x591/0xcf0 [ 130.770073][ T12] ? rescuer_thread+0xd10/0xd10 [ 130.770076][ T12] kthread+0x37b/0x5f0 [ 130.770081][ T12] ? kthread_is_per_cpu+0xc0/0xc0 [ 130.770084][ T12] ? ret_from_fork+0x1b/0x270 [ 130.770090][ T12] ? __lock_release+0x5d/0x170 [ 130.770095][ T12] ? rcu_is_watching+0x12/0xb0 [ 130.770098][ T12] ? kthread_is_per_cpu+0xc0/0xc0 [ 130.770102][ T12] ret_from_fork+0x1db/0x270 [ 130.770105][ T12] ? kthread_is_per_cpu+0xc0/0xc0 [ 130.770108][ T12] ret_from_fork_asm+0x11/0x20 [ 130.770120][ T12] [ 130.770121][ T12] [ 130.776245][ T12] Allocated by task 268: [ 130.776370][ T12] kasan_save_stack+0x24/0x40 [ 130.776551][ T12] kasan_save_track+0x14/0x30 [ 130.776712][ T12] __kasan_kmalloc+0x7b/0x90 [ 130.776874][ T12] __kvmalloc_node_noprof+0x2e5/0x8e0 [ 130.777035][ T12] alloc_netdev_mqs+0x7d/0x1370 [ 130.777196][ T12] ip6_tnl_init_net+0x102/0x3f0 [ 130.777357][ T12] ops_init+0x189/0x550 [ 130.777477][ T12] setup_net+0xf1/0x380 [ 130.777597][ T12] copy_net_ns+0x253/0x510 [ 130.777753][ T12] create_new_namespaces+0x35f/0x900 [ 130.777912][ T12] unshare_nsproxy_namespaces+0x8a/0x1a0 [ 130.778070][ T12] ksys_unshare+0x2be/0x6e0 [ 130.778227][ T12] __x64_sys_unshare+0x31/0x40 [ 130.778393][ T12] do_syscall_64+0xc1/0xfd0 [ 130.778597][ T12] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 130.778905][ T12] [ 130.778993][ T12] Freed by task 12: [ 130.779118][ T12] kasan_save_stack+0x24/0x40 [ 130.779299][ T12] kasan_save_track+0x14/0x30 [ 130.779473][ T12] __kasan_save_free_info+0x3b/0x60 [ 130.779735][ T12] __kasan_slab_free+0x3f/0x60 [ 130.779904][ T12] kfree+0x21d/0x540 [ 130.780032][ T12] device_release+0x9c/0x210 [ 130.780206][ T12] kobject_cleanup+0xfe/0x360 [ 130.780498][ T12] netdev_run_todo+0x81f/0xc60 [ 130.780689][ T12] ops_undo_list+0x714/0x890 [ 130.780860][ T12] cleanup_net+0x3b2/0x8b0 [ 130.781035][ T12] process_one_work+0xe35/0x1650 [ 130.781343][ T12] worker_thread+0x591/0xcf0 [ 130.781536][ T12] kthread+0x37b/0x5f0 [ 130.781676][ T12] ret_from_fork+0x1db/0x270 [ 130.781868][ T12] ret_from_fork_asm+0x11/0x20 [ 130.782164][ T12] [ 130.782246][ T12] The buggy address belongs to the object at ffff888008c79000 [ 130.782246][ T12] which belongs to the cache kmalloc-4k of size 4096 [ 130.782692][ T12] The buggy address is located 1732 bytes inside of [ 130.782692][ T12] freed 4096-byte region [ffff888008c79000, ffff888008c7a000) [ 130.783240][ T12] [ 130.783336][ T12] The buggy address belongs to the physical page: [ 130.783568][ T12] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8c78 [ 130.783917][ T12] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 130.784207][ T12] flags: 0x80000000000040(head|node=0|zone=1) [ 130.784464][ T12] page_type: f5(slab) [ 130.784727][ T12] raw: 0080000000000040 ffff888001043700 ffffea0000231c10 ffffea0000231810 [ 130.785072][ T12] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 130.785521][ T12] head: 0080000000000040 ffff888001043700 ffffea0000231c10 ffffea0000231810 [ 130.785851][ T12] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 130.786179][ T12] head: 0080000000000003 ffffea0000231e01 00000000ffffffff 00000000ffffffff [ 130.786609][ T12] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 130.786919][ T12] page dumped because: kasan: bad access detected [ 130.787257][ T12] [ 130.787371][ T12] Memory state around the buggy address: [ 130.787548][ T12] ffff888008c79580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 130.787810][ T12] ffff888008c79600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 130.788191][ T12] >ffff888008c79680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 130.788472][ T12] ^ [ 130.788698][ T12] ffff888008c79700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 130.789067][ T12] ffff888008c79780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 130.789348][ T12] ================================================================== [ 130.790301][ T12] Disabling lock debugging due to kernel taint [ 130.790538][ T12] ------------[ cut here ]------------ [ 130.790783][ T12] refcount_t: underflow; use-after-free. [ 130.792168][ T12] WARNING: CPU: 0 PID: 12 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0 [ 130.792505][ T12] Modules linked in: [ 130.792635][ T12] CPU: 0 UID: 0 PID: 12 Comm: kworker/u16:0 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full) [ 130.793045][ T12] Tainted: [B]=BAD_PAGE [ 130.793211][ T12] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 130.793475][ T12] Workqueue: netns cleanup_net [ 130.793664][ T12] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0 [ 130.793921][ 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 c5 b3 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 [ 130.794562][ T12] RSP: 0018:ffffc900000c7a08 EFLAGS: 00010282 [ 130.794822][ T12] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 130.795121][ T12] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001 [ 130.795427][ T12] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff6980934 [ 130.795866][ T12] R10: 0000000000000003 R11: ffffc900000c7580 R12: 0000000000000001 [ 130.796186][ T12] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100 [ 130.796487][ T12] FS: 0000000000000000(0000) GS:ffff8880b6f08000(0000) knlGS:0000000000000000 [ 130.796867][ T12] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 130.797095][ T12] CR2: 00007f3b8f063e60 CR3: 000000003a549005 CR4: 0000000000772ef0 [ 130.797362][ T12] PKRU: 55555554 [ 130.797492][ T12] Call Trace: [ 130.797627][ T12] [ 130.797776][ T12] netdev_run_todo+0x5f0/0xc60 [ 130.797950][ T12] ? dev_ingress_queue_create+0x190/0x190 [ 130.798137][ T12] ? generic_xdp_install+0x410/0x410 [ 130.798323][ T12] ? net_generic+0xb1/0x1f0 [ 130.798501][ T12] ops_undo_list+0x714/0x890 [ 130.798750][ T12] ? rtnl_net_dumpid_one+0x270/0x270 [ 130.798922][ T12] ? cleanup_net+0x2d6/0x8b0 [ 130.799090][ T12] cleanup_net+0x3b2/0x8b0 [ 130.799247][ T12] ? net_passive_dec+0x190/0x190 [ 130.799403][ T12] ? rcu_is_watching+0x12/0xb0 [ 130.799569][ T12] process_one_work+0xe35/0x1650 [ 130.799786][ T12] ? pwq_dec_nr_in_flight+0x550/0x550 [ 130.799941][ T12] ? assign_work+0x168/0x240 [ 130.800096][ T12] worker_thread+0x591/0xcf0 [ 130.800262][ T12] ? rescuer_thread+0xd10/0xd10 [ 130.800419][ T12] kthread+0x37b/0x5f0 [ 130.800539][ T12] ? kthread_is_per_cpu+0xc0/0xc0 [ 130.800760][ T12] ? ret_from_fork+0x1b/0x270 [ 130.800918][ T12] ? __lock_release+0x5d/0x170 [ 130.801075][ T12] ? rcu_is_watching+0x12/0xb0 [ 130.801229][ T12] ? kthread_is_per_cpu+0xc0/0xc0 [ 130.801386][ T12] ret_from_fork+0x1db/0x270 [ 130.801537][ T12] ? kthread_is_per_cpu+0xc0/0xc0 [ 130.801762][ T12] ret_from_fork_asm+0x11/0x20 [ 130.801923][ T12] [ 130.802042][ T12] irq event stamp: 23017 [ 130.802156][ T12] hardirqs last enabled at (23017): [] irqentry_exit+0x3b/0x80 [ 130.802434][ T12] hardirqs last disabled at (23016): [] handle_softirqs+0x47f/0x610 [ 130.802755][ T12] softirqs last enabled at (22032): [] handle_softirqs+0x352/0x610 [ 130.803062][ T12] softirqs last disabled at (22023): [] irq_exit_rcu+0xab/0x100 [ 130.803340][ T12] ---[ end trace 0000000000000000 ]--- [ 203.534365][ T1443] mpls_gso: MPLS GSO support [ 1237.262160][T14097] ip (14097) used greatest stack depth: 23896 bytes left