[ 11.552054][ T284] veth0: renamed from veth-rt-1 [ 12.433824][ T293] veth0: renamed from veth-rt-2 [ 13.730471][ T307] ip (307) used greatest stack depth: 24112 bytes left [ 51.478409][ T68] ================================================================== [ 51.478619][ T68] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 51.478799][ T68] Read of size 8 at addr ffff88800ca880f8 by task kworker/u16:1/68 [ 51.478971][ T68] [ 51.479035][ T68] CPU: 1 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 51.479232][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 51.479385][ T68] Workqueue: netns cleanup_net [ 51.479529][ T68] Call Trace: [ 51.479623][ T68] [ 51.479687][ T68] dump_stack_lvl+0x82/0xd0 [ 51.479814][ T68] print_address_description.constprop.0+0x2c/0x3b0 [ 51.479970][ T68] ? cleanup_net+0xa5d/0xb90 [ 51.480093][ T68] print_report+0xb4/0x270 [ 51.480221][ T68] ? kasan_addr_to_slab+0x25/0x80 [ 51.480342][ T68] kasan_report+0xbd/0xf0 [ 51.480435][ T68] ? cleanup_net+0xa5d/0xb90 [ 51.480559][ T68] cleanup_net+0xa5d/0xb90 [ 51.480682][ T68] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 51.480809][ T68] ? __pfx_cleanup_net+0x10/0x10 [ 51.480932][ T68] ? trace_lock_acquire+0x148/0x1f0 [ 51.481059][ T68] ? lock_acquire+0x32/0xc0 [ 51.481182][ T68] ? process_one_work+0xe0b/0x16d0 [ 51.481313][ T68] process_one_work+0xe55/0x16d0 [ 51.481436][ T68] ? __pfx___lock_release+0x10/0x10 [ 51.481561][ T68] ? __pfx_process_one_work+0x10/0x10 [ 51.481685][ T68] ? assign_work+0x16c/0x240 [ 51.481810][ T68] worker_thread+0x58c/0xce0 [ 51.481932][ T68] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 51.482088][ T68] ? __pfx_worker_thread+0x10/0x10 [ 51.482211][ T68] ? __pfx_worker_thread+0x10/0x10 [ 51.482331][ T68] kthread+0x28a/0x350 [ 51.482425][ T68] ? __pfx_kthread+0x10/0x10 [ 51.482551][ T68] ret_from_fork+0x31/0x70 [ 51.482674][ T68] ? __pfx_kthread+0x10/0x10 [ 51.482798][ T68] ret_from_fork_asm+0x1a/0x30 [ 51.482925][ T68] [ 51.483020][ T68] [ 51.483089][ T68] Allocated by task 267: [ 51.483182][ T68] kasan_save_stack+0x24/0x50 [ 51.483306][ T68] kasan_save_track+0x14/0x30 [ 51.483427][ T68] __kasan_slab_alloc+0x59/0x70 [ 51.483548][ T68] kmem_cache_alloc_noprof+0x10b/0x350 [ 51.483672][ T68] copy_net_ns+0xc6/0x540 [ 51.483767][ T68] create_new_namespaces+0x35f/0x920 [ 51.483899][ T68] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 51.484023][ T68] ksys_unshare+0x2c4/0x6e0 [ 51.484148][ T68] __x64_sys_unshare+0x31/0x40 [ 51.484271][ T68] do_syscall_64+0xc1/0x1d0 [ 51.484393][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 51.484547][ T68] [ 51.484608][ T68] Freed by task 68: [ 51.484700][ T68] kasan_save_stack+0x24/0x50 [ 51.484825][ T68] kasan_save_track+0x14/0x30 [ 51.484947][ T68] kasan_save_free_info+0x3b/0x60 [ 51.485070][ T68] __kasan_slab_free+0x38/0x50 [ 51.485189][ T68] kmem_cache_free+0xf8/0x330 [ 51.485310][ T68] cleanup_net+0x5a8/0xb90 [ 51.485430][ T68] process_one_work+0xe55/0x16d0 [ 51.485551][ T68] worker_thread+0x58c/0xce0 [ 51.485676][ T68] kthread+0x28a/0x350 [ 51.485780][ T68] ret_from_fork+0x31/0x70 [ 51.485899][ T68] ret_from_fork_asm+0x1a/0x30 [ 51.486019][ T68] [ 51.486081][ T68] Last potentially related work creation: [ 51.486203][ T68] kasan_save_stack+0x24/0x50 [ 51.486333][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 51.486457][ T68] insert_work+0x34/0x230 [ 51.486550][ T68] __queue_work+0x5fd/0xa40 [ 51.486671][ T68] queue_delayed_work_on+0x8c/0xa0 [ 51.486795][ T68] __inet_insert_ifa+0x751/0xb10 [ 51.486921][ T68] inet_rtm_newaddr+0x833/0xbd0 [ 51.487045][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 51.487169][ T68] netlink_rcv_skb+0x130/0x360 [ 51.487294][ T68] netlink_unicast+0x44b/0x710 [ 51.487419][ T68] netlink_sendmsg+0x723/0xbe0 [ 51.487543][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 51.487668][ T68] ___sys_sendmsg+0xee/0x170 [ 51.487795][ T68] __sys_sendmsg+0x109/0x1a0 [ 51.487920][ T68] do_syscall_64+0xc1/0x1d0 [ 51.488043][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 51.488196][ T68] [ 51.488258][ T68] Second to last potentially related work creation: [ 51.488409][ T68] kasan_save_stack+0x24/0x50 [ 51.488534][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 51.488660][ T68] insert_work+0x34/0x230 [ 51.488753][ T68] __queue_work+0x5fd/0xa40 [ 51.488876][ T68] queue_delayed_work_on+0x8c/0xa0 [ 51.489008][ T68] __inet_insert_ifa+0x751/0xb10 [ 51.489130][ T68] inet_rtm_newaddr+0x833/0xbd0 [ 51.489253][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 51.489376][ T68] netlink_rcv_skb+0x130/0x360 [ 51.489499][ T68] netlink_unicast+0x44b/0x710 [ 51.489622][ T68] netlink_sendmsg+0x723/0xbe0 [ 51.489745][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 51.489870][ T68] ___sys_sendmsg+0xee/0x170 [ 51.489995][ T68] __sys_sendmsg+0x109/0x1a0 [ 51.490119][ T68] do_syscall_64+0xc1/0x1d0 [ 51.490252][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 51.490402][ T68] [ 51.490465][ T68] The buggy address belongs to the object at ffff88800ca88040 [ 51.490465][ T68] which belongs to the cache net_namespace of size 6528 [ 51.490797][ T68] The buggy address is located 184 bytes inside of [ 51.490797][ T68] freed 6528-byte region [ffff88800ca88040, ffff88800ca899c0) [ 51.491090][ T68] [ 51.491152][ T68] The buggy address belongs to the physical page: [ 51.491302][ T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca88 [ 51.491517][ T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 51.491700][ T68] flags: 0x80000000000040(head|node=0|zone=1) [ 51.491856][ T68] page_type: f5(slab) [ 51.491953][ T68] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 51.492173][ T68] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 51.492389][ T68] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 51.492603][ T68] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 51.492817][ T68] head: 0080000000000003 ffffea000032a201 ffffffffffffffff 0000000000000000 [ 51.493029][ T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 51.493242][ T68] page dumped because: kasan: bad access detected [ 51.493392][ T68] [ 51.493453][ T68] Memory state around the buggy address: [ 51.493571][ T68] ffff88800ca87f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 51.493746][ T68] ffff88800ca88000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 51.493925][ T68] >ffff88800ca88080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.494100][ T68] ^ [ 51.494274][ T68] ffff88800ca88100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.494448][ T68] ffff88800ca88180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.494624][ T68] ================================================================== [ 51.494886][ T68] Disabling lock debugging due to kernel taint