[ 11.623314][ T265] ip (265) used greatest stack depth: 23168 bytes left [ 14.322615][ T301] br0: port 1(gw_l) entered blocking state [ 14.323038][ T301] br0: port 1(gw_l) entered disabled state [ 14.323364][ T301] gw_l: entered allmulticast mode [ 14.324618][ T301] gw_l: entered promiscuous mode [ 14.326369][ T301] br0: port 1(gw_l) entered blocking state [ 14.326703][ T301] br0: port 1(gw_l) entered forwarding state [ 14.731431][ T303] br0: port 2(amtg) entered blocking state [ 14.731816][ T303] br0: port 2(amtg) entered disabled state [ 14.732076][ T303] amtg: entered allmulticast mode [ 14.733822][ T303] amtg: entered promiscuous mode [ 16.247367][ T314] br0: port 2(amtg) entered blocking state [ 16.247764][ T314] br0: port 2(amtg) entered forwarding state [ 17.141105][ T323] amtr: entered allmulticast mode [ 17.141557][ T323] relay_gw: entered allmulticast mode [ 17.141863][ T323] relay_src: entered allmulticast mode [ 1226.231794][ T65] br0: port 1(gw_l) entered disabled state [ 1226.307988][ T65] gw_l (unregistering): left allmulticast mode [ 1226.308375][ T65] gw_l (unregistering): left promiscuous mode [ 1226.308605][ T65] br0: port 1(gw_l) entered disabled state [ 1226.378113][ T65] amtg: left allmulticast mode [ 1226.378451][ T65] amtg: left promiscuous mode [ 1226.378875][ T65] br0: port 2(amtg) entered disabled state [ 1226.439961][ T323] amtr: left allmulticast mode [ 1226.440281][ T323] relay_gw: left allmulticast mode [ 1226.440521][ T323] relay_src: left allmulticast mode [ 1226.733506][ T65] ================================================================== [ 1226.733748][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 1226.733938][ T65] Read of size 8 at addr ffff88800c4900f8 by task kworker/u16:1/65 [ 1226.734116][ T65] [ 1226.734188][ T65] CPU: 1 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 1226.734380][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1226.734539][ T65] Workqueue: netns cleanup_net [ 1226.734681][ T65] Call Trace: [ 1226.734778][ T65] [ 1226.734847][ T65] dump_stack_lvl+0x82/0xd0 [ 1226.734979][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 1226.735143][ T65] ? cleanup_net+0xa5d/0xb90 [ 1226.735271][ T65] print_report+0xb4/0x270 [ 1226.735397][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 1226.735534][ T65] kasan_report+0xbd/0xf0 [ 1226.735628][ T65] ? cleanup_net+0xa5d/0xb90 [ 1226.735757][ T65] cleanup_net+0xa5d/0xb90 [ 1226.735886][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1226.736018][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 1226.736147][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 1226.736274][ T65] ? lock_acquire+0x32/0xc0 [ 1226.736397][ T65] ? process_one_work+0xe0b/0x16d0 [ 1226.736528][ T65] process_one_work+0xe55/0x16d0 [ 1226.736657][ T65] ? __pfx___lock_release+0x10/0x10 [ 1226.736784][ T65] ? __pfx_process_one_work+0x10/0x10 [ 1226.736909][ T65] ? assign_work+0x16c/0x240 [ 1226.737034][ T65] worker_thread+0x58c/0xce0 [ 1226.737160][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 1226.737319][ T65] ? __pfx_worker_thread+0x10/0x10 [ 1226.737446][ T65] ? __pfx_worker_thread+0x10/0x10 [ 1226.737571][ T65] kthread+0x28a/0x350 [ 1226.737666][ T65] ? __pfx_kthread+0x10/0x10 [ 1226.737792][ T65] ret_from_fork+0x31/0x70 [ 1226.737916][ T65] ? __pfx_kthread+0x10/0x10 [ 1226.738041][ T65] ret_from_fork_asm+0x1a/0x30 [ 1226.738170][ T65] [ 1226.738266][ T65] [ 1226.738331][ T65] Allocated by task 255: [ 1226.738426][ T65] kasan_save_stack+0x24/0x50 [ 1226.738553][ T65] kasan_save_track+0x14/0x30 [ 1226.738678][ T65] __kasan_slab_alloc+0x59/0x70 [ 1226.738802][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 1226.738927][ T65] copy_net_ns+0xc6/0x540 [ 1226.739022][ T65] create_new_namespaces+0x35f/0x920 [ 1226.739150][ T65] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 1226.739275][ T65] ksys_unshare+0x2c4/0x6e0 [ 1226.739403][ T65] __x64_sys_unshare+0x31/0x40 [ 1226.739528][ T65] do_syscall_64+0xc1/0x1d0 [ 1226.739653][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1226.739808][ T65] [ 1226.739872][ T65] Freed by task 65: [ 1226.739971][ T65] kasan_save_stack+0x24/0x50 [ 1226.740105][ T65] kasan_save_track+0x14/0x30 [ 1226.740229][ T65] kasan_save_free_info+0x3b/0x60 [ 1226.740365][ T65] __kasan_slab_free+0x38/0x50 [ 1226.740497][ T65] kmem_cache_free+0xf8/0x330 [ 1226.740624][ T65] cleanup_net+0x5a8/0xb90 [ 1226.740748][ T65] process_one_work+0xe55/0x16d0 [ 1226.740872][ T65] worker_thread+0x58c/0xce0 [ 1226.740997][ T65] kthread+0x28a/0x350 [ 1226.741091][ T65] ret_from_fork+0x31/0x70 [ 1226.741212][ T65] ret_from_fork_asm+0x1a/0x30 [ 1226.741336][ T65] [ 1226.741401][ T65] Last potentially related work creation: [ 1226.741525][ T65] kasan_save_stack+0x24/0x50 [ 1226.741660][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 1226.741792][ T65] insert_work+0x34/0x230 [ 1226.741889][ T65] __queue_work+0x5fd/0xa40 [ 1226.742020][ T65] call_timer_fn+0x13b/0x230 [ 1226.742148][ T65] __run_timers+0x3ff/0x810 [ 1226.742275][ T65] run_timer_softirq+0x154/0x1c0 [ 1226.742401][ T65] handle_softirqs+0x1f6/0x5c0 [ 1226.742529][ T65] __irq_exit_rcu+0xc4/0x100 [ 1226.742661][ T65] irq_exit_rcu+0xe/0x20 [ 1226.742758][ T65] sysvec_apic_timer_interrupt+0x78/0x90 [ 1226.742884][ T65] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 1226.743043][ T65] [ 1226.743108][ T65] Second to last potentially related work creation: [ 1226.743264][ T65] kasan_save_stack+0x24/0x50 [ 1226.743393][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 1226.743518][ T65] insert_work+0x34/0x230 [ 1226.743613][ T65] __queue_work+0x2ff/0xa40 [ 1226.743737][ T65] call_timer_fn+0x13b/0x230 [ 1226.743876][ T65] __run_timers+0x3ff/0x810 [ 1226.743998][ T65] run_timer_softirq+0x154/0x1c0 [ 1226.744124][ T65] handle_softirqs+0x1f6/0x5c0 [ 1226.744247][ T65] __irq_exit_rcu+0xc4/0x100 [ 1226.744370][ T65] irq_exit_rcu+0xe/0x20 [ 1226.744465][ T65] sysvec_apic_timer_interrupt+0x78/0x90 [ 1226.744594][ T65] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 1226.744749][ T65] [ 1226.744816][ T65] The buggy address belongs to the object at ffff88800c490040 [ 1226.744816][ T65] which belongs to the cache net_namespace of size 6528 [ 1226.745142][ T65] The buggy address is located 184 bytes inside of [ 1226.745142][ T65] freed 6528-byte region [ffff88800c490040, ffff88800c4919c0) [ 1226.745445][ T65] [ 1226.745510][ T65] The buggy address belongs to the physical page: [ 1226.745666][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc490 [ 1226.745883][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 1226.746070][ T65] flags: 0x80000000000040(head|node=0|zone=1) [ 1226.746228][ T65] page_type: f5(slab) [ 1226.746327][ T65] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 1226.746554][ T65] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 1226.746772][ T65] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 1226.747006][ T65] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 1226.747227][ T65] head: 0080000000000003 ffffea0000312401 ffffffffffffffff 0000000000000000 [ 1226.747452][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 1226.747673][ T65] page dumped because: kasan: bad access detected [ 1226.747830][ T65] [ 1226.747892][ T65] Memory state around the buggy address: [ 1226.748017][ T65] ffff88800c48ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 1226.748202][ T65] ffff88800c490000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 1226.748385][ T65] >ffff88800c490080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1226.748574][ T65] ^ [ 1226.748760][ T65] ffff88800c490100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1226.748937][ T65] ffff88800c490180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1226.749118][ T65] ================================================================== [ 1226.749313][ T65] Disabling lock debugging due to kernel taint