[ 11.051417][ T270] ip (270) used greatest stack depth: 23344 bytes left [ 15.105663][ T317] Initializing XFRM netlink socket [ 563.732422][ T65] ================================================================== [ 563.732640][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 563.732869][ T65] Read of size 8 at addr ffff8880092780f8 by task kworker/u16:1/65 [ 563.733062][ T65] [ 563.733126][ T65] CPU: 3 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 563.733320][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 563.733479][ T65] Workqueue: netns cleanup_net [ 563.733609][ T65] Call Trace: [ 563.733698][ T65] [ 563.733765][ T65] dump_stack_lvl+0x82/0xd0 [ 563.733896][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 563.734059][ T65] ? cleanup_net+0xa5d/0xb90 [ 563.734182][ T65] print_report+0xb4/0x270 [ 563.734307][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 563.734431][ T65] kasan_report+0xbd/0xf0 [ 563.734526][ T65] ? cleanup_net+0xa5d/0xb90 [ 563.734654][ T65] cleanup_net+0xa5d/0xb90 [ 563.734777][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 563.734909][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 563.735033][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 563.735167][ T65] ? lock_acquire+0x32/0xc0 [ 563.735292][ T65] ? process_one_work+0xe0b/0x16d0 [ 563.735419][ T65] process_one_work+0xe55/0x16d0 [ 563.735545][ T65] ? __pfx___lock_release+0x10/0x10 [ 563.735668][ T65] ? __pfx_process_one_work+0x10/0x10 [ 563.735796][ T65] ? assign_work+0x16c/0x240 [ 563.735926][ T65] worker_thread+0x58c/0xce0 [ 563.736051][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 563.736205][ T65] ? __pfx_worker_thread+0x10/0x10 [ 563.736330][ T65] ? __pfx_worker_thread+0x10/0x10 [ 563.736456][ T65] kthread+0x28a/0x350 [ 563.736552][ T65] ? __pfx_kthread+0x10/0x10 [ 563.736676][ T65] ret_from_fork+0x31/0x70 [ 563.736802][ T65] ? __pfx_kthread+0x10/0x10 [ 563.736935][ T65] ret_from_fork_asm+0x1a/0x30 [ 563.737063][ T65] [ 563.737156][ T65] [ 563.737219][ T65] Allocated by task 258: [ 563.737314][ T65] kasan_save_stack+0x24/0x50 [ 563.737444][ T65] kasan_save_track+0x14/0x30 [ 563.737569][ T65] __kasan_slab_alloc+0x59/0x70 [ 563.737689][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 563.737818][ T65] copy_net_ns+0xc6/0x540 [ 563.737906][ T65] create_new_namespaces+0x35f/0x920 [ 563.738029][ T65] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 563.738156][ T65] ksys_unshare+0x2c4/0x6e0 [ 563.738284][ T65] __x64_sys_unshare+0x31/0x40 [ 563.738410][ T65] do_syscall_64+0xc1/0x1d0 [ 563.738537][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 563.738695][ T65] [ 563.738759][ T65] Freed by task 65: [ 563.738852][ T65] kasan_save_stack+0x24/0x50 [ 563.738979][ T65] kasan_save_track+0x14/0x30 [ 563.739102][ T65] kasan_save_free_info+0x3b/0x60 [ 563.739227][ T65] __kasan_slab_free+0x38/0x50 [ 563.739353][ T65] kmem_cache_free+0xf8/0x330 [ 563.739478][ T65] cleanup_net+0x5a8/0xb90 [ 563.739603][ T65] process_one_work+0xe55/0x16d0 [ 563.739726][ T65] worker_thread+0x58c/0xce0 [ 563.739852][ T65] kthread+0x28a/0x350 [ 563.739945][ T65] ret_from_fork+0x31/0x70 [ 563.740068][ T65] ret_from_fork_asm+0x1a/0x30 [ 563.740199][ T65] [ 563.740262][ T65] Last potentially related work creation: [ 563.740386][ T65] kasan_save_stack+0x24/0x50 [ 563.740510][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 563.740635][ T65] insert_work+0x34/0x230 [ 563.740727][ T65] __queue_work+0x5fd/0xa40 [ 563.740852][ T65] call_timer_fn+0x13b/0x230 [ 563.740975][ T65] __run_timers+0x3ff/0x810 [ 563.741104][ T65] run_timer_softirq+0x154/0x1c0 [ 563.741224][ T65] handle_softirqs+0x1f6/0x5c0 [ 563.741350][ T65] __irq_exit_rcu+0xc4/0x100 [ 563.741472][ T65] irq_exit_rcu+0xe/0x20 [ 563.741566][ T65] sysvec_apic_timer_interrupt+0x78/0x90 [ 563.741687][ T65] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 563.741842][ T65] [ 563.741910][ T65] Second to last potentially related work creation: [ 563.742063][ T65] kasan_save_stack+0x24/0x50 [ 563.742186][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 563.742310][ T65] insert_work+0x34/0x230 [ 563.742404][ T65] __queue_work+0x2ff/0xa40 [ 563.742528][ T65] call_timer_fn+0x13b/0x230 [ 563.742652][ T65] __run_timers+0x3ff/0x810 [ 563.742783][ T65] run_timer_softirq+0x154/0x1c0 [ 563.742912][ T65] handle_softirqs+0x1f6/0x5c0 [ 563.743035][ T65] __irq_exit_rcu+0xc4/0x100 [ 563.743158][ T65] irq_exit_rcu+0xe/0x20 [ 563.743253][ T65] sysvec_apic_timer_interrupt+0x78/0x90 [ 563.743375][ T65] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 563.743527][ T65] [ 563.743589][ T65] The buggy address belongs to the object at ffff888009278040 [ 563.743589][ T65] which belongs to the cache net_namespace of size 6528 [ 563.743911][ T65] The buggy address is located 184 bytes inside of [ 563.743911][ T65] freed 6528-byte region [ffff888009278040, ffff8880092799c0) [ 563.744203][ T65] [ 563.744265][ T65] The buggy address belongs to the physical page: [ 563.744413][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9278 [ 563.744631][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 563.744818][ T65] flags: 0x80000000000040(head|node=0|zone=1) [ 563.744972][ T65] page_type: f5(slab) [ 563.745070][ T65] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 563.745292][ T65] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 563.745510][ T65] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 563.745730][ T65] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 563.745946][ T65] head: 0080000000000003 ffffea0000249e01 ffffffffffffffff 0000000000000000 [ 563.746162][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 563.746381][ T65] page dumped because: kasan: bad access detected [ 563.746531][ T65] [ 563.746593][ T65] Memory state around the buggy address: [ 563.746713][ T65] ffff888009277f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 563.746889][ T65] ffff888009278000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 563.747062][ T65] >ffff888009278080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 563.747245][ T65] ^ [ 563.747420][ T65] ffff888009278100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 563.747596][ T65] ffff888009278180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 563.747769][ T65] ================================================================== [ 563.747965][ T65] Disabling lock debugging due to kernel taint