[ 21.694546][ T71] ================================================================== [ 21.694886][ T71] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0 [ 21.695186][ T71] Read of size 1 at addr ffff8880091a16c4 by task kworker/u16:1/71 [ 21.695445][ T71] [ 21.695536][ T71] CPU: 3 UID: 0 PID: 71 Comm: kworker/u16:1 Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full) [ 21.695542][ T71] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 21.695546][ T71] Workqueue: netns cleanup_net [ 21.695556][ T71] Call Trace: [ 21.695558][ T71] [ 21.695561][ T71] dump_stack_lvl+0x82/0xc0 [ 21.695568][ T71] print_address_description.constprop.0+0x2c/0x3a0 [ 21.695585][ T71] ? kobject_put+0xbb/0xd0 [ 21.695589][ T71] print_report+0xb4/0x270 [ 21.695592][ T71] ? kobject_put+0xbb/0xd0 [ 21.695595][ T71] ? kasan_addr_to_slab+0x21/0x70 [ 21.695601][ T71] ? kobject_put+0xbb/0xd0 [ 21.695604][ T71] kasan_report+0xca/0x100 [ 21.695609][ T71] ? kobject_put+0xbb/0xd0 [ 21.695614][ T71] kobject_put+0xbb/0xd0 [ 21.695618][ T71] netdev_run_todo+0x5f0/0xc60 [ 21.695630][ T71] ? dev_ingress_queue_create+0x190/0x190 [ 21.695636][ T71] ? generic_xdp_install+0x410/0x410 [ 21.695639][ T71] ? net_generic+0xb1/0x1f0 [ 21.695649][ T71] ops_undo_list+0x714/0x890 [ 21.695655][ T71] ? rtnl_net_dumpid_one+0x270/0x270 [ 21.695658][ T71] ? cleanup_net+0x2d6/0x8b0 [ 21.695664][ T71] cleanup_net+0x3b2/0x8b0 [ 21.695669][ T71] ? net_passive_dec+0x190/0x190 [ 21.695674][ T71] ? rcu_is_watching+0x12/0xb0 [ 21.695688][ T71] process_one_work+0xe35/0x1650 [ 21.695703][ T71] ? pwq_dec_nr_in_flight+0x550/0x550 [ 21.695711][ T71] ? assign_work+0x168/0x240 [ 21.695717][ T71] worker_thread+0x591/0xcf0 [ 21.695726][ T71] ? rescuer_thread+0xd10/0xd10 [ 21.695730][ T71] kthread+0x37b/0x5f0 [ 21.695736][ T71] ? kthread_is_per_cpu+0xc0/0xc0 [ 21.695739][ T71] ? ret_from_fork+0x1b/0x270 [ 21.695753][ T71] ? __lock_release+0x5d/0x170 [ 21.695759][ T71] ? rcu_is_watching+0x12/0xb0 [ 21.695762][ T71] ? kthread_is_per_cpu+0xc0/0xc0 [ 21.695768][ T71] ret_from_fork+0x1db/0x270 [ 21.695771][ T71] ? kthread_is_per_cpu+0xc0/0xc0 [ 21.695774][ T71] ret_from_fork_asm+0x11/0x20 [ 21.695788][ T71] [ 21.695790][ T71] [ 21.702926][ T71] Allocated by task 263: [ 21.703070][ T71] kasan_save_stack+0x24/0x40 [ 21.703264][ T71] kasan_save_track+0x14/0x30 [ 21.703447][ T71] __kasan_kmalloc+0x7b/0x90 [ 21.703628][ T71] __kvmalloc_node_noprof+0x2e5/0x8e0 [ 21.703826][ T71] alloc_netdev_mqs+0x7d/0x1370 [ 21.704018][ T71] ip6_tnl_init_net+0x102/0x3f0 [ 21.704210][ T71] ops_init+0x189/0x550 [ 21.704352][ T71] setup_net+0xf1/0x380 [ 21.704487][ T71] copy_net_ns+0x253/0x510 [ 21.704666][ T71] create_new_namespaces+0x35f/0x900 [ 21.704873][ T71] unshare_nsproxy_namespaces+0x8a/0x1a0 [ 21.705060][ T71] ksys_unshare+0x2be/0x6e0 [ 21.705244][ T71] __x64_sys_unshare+0x31/0x40 [ 21.705430][ T71] do_syscall_64+0xc1/0xfd0 [ 21.705614][ T71] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 21.705873][ T71] [ 21.705973][ T71] Freed by task 71: [ 21.706114][ T71] kasan_save_stack+0x24/0x40 [ 21.706311][ T71] kasan_save_track+0x14/0x30 [ 21.706486][ T71] __kasan_save_free_info+0x3b/0x60 [ 21.706674][ T71] __kasan_slab_free+0x3f/0x60 [ 21.706874][ T71] kfree+0x21d/0x540 [ 21.707013][ T71] device_release+0x9c/0x210 [ 21.707199][ T71] kobject_cleanup+0xfe/0x360 [ 21.707391][ T71] netdev_run_todo+0x81f/0xc60 [ 21.707573][ T71] ops_undo_list+0x714/0x890 [ 21.707768][ T71] cleanup_net+0x3b2/0x8b0 [ 21.707967][ T71] process_one_work+0xe35/0x1650 [ 21.708176][ T71] worker_thread+0x591/0xcf0 [ 21.708353][ T71] kthread+0x37b/0x5f0 [ 21.708485][ T71] ret_from_fork+0x1db/0x270 [ 21.708671][ T71] ret_from_fork_asm+0x11/0x20 [ 21.708877][ T71] [ 21.708979][ T71] The buggy address belongs to the object at ffff8880091a1000 [ 21.708979][ T71] which belongs to the cache kmalloc-4k of size 4096 [ 21.709426][ T71] The buggy address is located 1732 bytes inside of [ 21.709426][ T71] freed 4096-byte region [ffff8880091a1000, ffff8880091a2000) [ 21.709876][ T71] [ 21.709972][ T71] The buggy address belongs to the physical page: [ 21.710191][ T71] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x91a0 [ 21.710570][ T71] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 21.710858][ T71] flags: 0x80000000000040(head|node=0|zone=1) [ 21.711108][ T71] page_type: f5(slab) [ 21.711255][ T71] raw: 0080000000000040 ffff888001043700 ffffea0000248a10 ffffea000023f010 [ 21.711621][ T71] raw: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 21.711979][ T71] head: 0080000000000040 ffff888001043700 ffffea0000248a10 ffffea000023f010 [ 21.712321][ T71] head: 0000000000000000 0000000000020002 00000000f5000000 0000000000000000 [ 21.712642][ T71] head: 0080000000000003 ffffea0000246801 00000000ffffffff 00000000ffffffff [ 21.712987][ T71] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 21.713346][ T71] page dumped because: kasan: bad access detected [ 21.713571][ T71] [ 21.713674][ T71] Memory state around the buggy address: [ 21.713868][ T71] ffff8880091a1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.714145][ T71] ffff8880091a1600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.714418][ T71] >ffff8880091a1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.714685][ T71] ^ [ 21.714929][ T71] ffff8880091a1700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.715187][ T71] ffff8880091a1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.715447][ T71] ================================================================== [ 21.716299][ T71] Disabling lock debugging due to kernel taint [ 21.716536][ T71] ------------[ cut here ]------------ [ 21.716713][ T71] refcount_t: underflow; use-after-free. [ 21.716932][ T71] WARNING: CPU: 3 PID: 71 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0 [ 21.717330][ T71] Modules linked in: [ 21.717471][ T71] CPU: 3 UID: 0 PID: 71 Comm: kworker/u16:1 Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full) [ 21.717891][ T71] Tainted: [B]=BAD_PAGE [ 21.718048][ T71] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 21.718348][ T71] Workqueue: netns cleanup_net [ 21.718542][ T71] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0 [ 21.718787][ T71] 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 94 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 [ 21.719503][ T71] RSP: 0018:ffffc900004c7a08 EFLAGS: 00010282 [ 21.719772][ T71] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 21.720058][ T71] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001 [ 21.720419][ T71] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff2a40934 [ 21.720697][ T71] R10: 0000000000000003 R11: ffffc900004c7580 R12: 0000000000000001 [ 21.720979][ T71] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100 [ 21.721336][ T71] FS: 0000000000000000(0000) GS:ffff8880d6a88000(0000) knlGS:0000000000000000 [ 21.721671][ T71] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.721921][ T71] CR2: 00007f0bba894e60 CR3: 0000000068149001 CR4: 0000000000772ef0 [ 21.722260][ T71] PKRU: 55555554 [ 21.722404][ T71] Call Trace: [ 21.722531][ T71] [ 21.722636][ T71] netdev_run_todo+0x5f0/0xc60 [ 21.722838][ T71] ? dev_ingress_queue_create+0x190/0x190 [ 21.723028][ T71] ? generic_xdp_install+0x410/0x410 [ 21.723286][ T71] ? net_generic+0xb1/0x1f0 [ 21.723467][ T71] ops_undo_list+0x714/0x890 [ 21.723650][ T71] ? rtnl_net_dumpid_one+0x270/0x270 [ 21.723846][ T71] ? cleanup_net+0x2d6/0x8b0 [ 21.724036][ T71] cleanup_net+0x3b2/0x8b0 [ 21.724376][ T71] ? net_passive_dec+0x190/0x190 [ 21.724559][ T71] ? rcu_is_watching+0x12/0xb0 [ 21.724759][ T71] process_one_work+0xe35/0x1650 [ 21.724960][ T71] ? pwq_dec_nr_in_flight+0x550/0x550 [ 21.725218][ T71] ? assign_work+0x168/0x240 [ 21.725404][ T71] worker_thread+0x591/0xcf0 [ 21.725584][ T71] ? rescuer_thread+0xd10/0xd10 [ 21.725774][ T71] kthread+0x37b/0x5f0 [ 21.725932][ T71] ? kthread_is_per_cpu+0xc0/0xc0 [ 21.726110][ T71] ? ret_from_fork+0x1b/0x270 [ 21.726378][ T71] ? __lock_release+0x5d/0x170 [ 21.726561][ T71] ? rcu_is_watching+0x12/0xb0 [ 21.726761][ T71] ? kthread_is_per_cpu+0xc0/0xc0 [ 21.726960][ T71] ret_from_fork+0x1db/0x270 [ 21.727212][ T71] ? kthread_is_per_cpu+0xc0/0xc0 [ 21.727404][ T71] ret_from_fork_asm+0x11/0x20 [ 21.727593][ T71] [ 21.727735][ T71] irq event stamp: 9965 [ 21.727889][ T71] hardirqs last enabled at (9965): [] irqentry_exit+0x3b/0x80 [ 21.728295][ T71] hardirqs last disabled at (9964): [] handle_softirqs+0x47f/0x610 [ 21.728602][ T71] softirqs last enabled at (8972): [] handle_softirqs+0x352/0x610 [ 21.728973][ T71] softirqs last disabled at (8965): [] irq_exit_rcu+0xab/0x100 [ 21.729474][ T71] ---[ end trace 0000000000000000 ]--- [ 24.192390][ T304] veth0: renamed from ioam-veth-alpha [ 24.290380][ T305] veth0: renamed from ioam-veth-betaL [ 24.379443][ T306] veth1: renamed from ioam-veth-betaR [ 24.466046][ T307] veth0: renamed from ioam-veth-gamma