[ 15.118027][ T274] u32 classifier [ 15.118261][ T274] input device check on [ 15.118466][ T274] Actions configured [ 15.309464][ T276] netem: version 1.3 [ 16.335093][ T282] sctp: Hash tables configured (bind 32/56) [ 17.059748][ C2] htb: netem qdisc 10: is non-work-conserving? [ 19.936665][ T11] ================================================================== [ 19.936901][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 19.937101][ T11] Read of size 8 at addr ffff888004d480f8 by task kworker/u16:0/11 [ 19.937287][ T11] [ 19.937357][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 19.937551][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 19.937714][ T11] Workqueue: netns cleanup_net [ 19.937849][ T11] Call Trace: [ 19.937942][ T11] [ 19.938009][ T11] dump_stack_lvl+0x82/0xd0 [ 19.938141][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 19.938304][ T11] ? cleanup_net+0x932/0xa40 [ 19.938437][ T11] print_report+0xb4/0x270 [ 19.938563][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 19.938694][ T11] kasan_report+0xbd/0xf0 [ 19.938794][ T11] ? cleanup_net+0x932/0xa40 [ 19.938921][ T11] cleanup_net+0x932/0xa40 [ 19.939045][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 19.939180][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 19.939305][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 19.939434][ T11] ? lock_acquire+0x32/0xc0 [ 19.939564][ T11] ? process_one_work+0xe0b/0x16d0 [ 19.939690][ T11] process_one_work+0xe55/0x16d0 [ 19.939821][ T11] ? __pfx___lock_release+0x10/0x10 [ 19.939949][ T11] ? __pfx_process_one_work+0x10/0x10 [ 19.940084][ T11] ? assign_work+0x16c/0x240 [ 19.940210][ T11] worker_thread+0x58c/0xce0 [ 19.940342][ T11] ? __pfx_worker_thread+0x10/0x10 [ 19.940469][ T11] kthread+0x28a/0x350 [ 19.940573][ T11] ? __pfx_kthread+0x10/0x10 [ 19.940699][ T11] ret_from_fork+0x31/0x70 [ 19.940831][ T11] ? __pfx_kthread+0x10/0x10 [ 19.940954][ T11] ret_from_fork_asm+0x1a/0x30 [ 19.941086][ T11] [ 19.941182][ T11] [ 19.941249][ T11] Allocated by task 247: [ 19.941345][ T11] kasan_save_stack+0x24/0x50 [ 19.941475][ T11] kasan_save_track+0x14/0x30 [ 19.941603][ T11] __kasan_slab_alloc+0x59/0x70 [ 19.941729][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 19.941857][ T11] copy_net_ns+0xc6/0x340 [ 19.941951][ T11] create_new_namespaces+0x35f/0x920 [ 19.942076][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 19.942199][ T11] ksys_unshare+0x2a9/0x660 [ 19.942327][ T11] __x64_sys_unshare+0x31/0x40 [ 19.942449][ T11] do_syscall_64+0xc1/0x1d0 [ 19.942590][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.942753][ T11] [ 19.942818][ T11] Freed by task 11: [ 19.942911][ T11] kasan_save_stack+0x24/0x50 [ 19.943039][ T11] kasan_save_track+0x14/0x30 [ 19.943160][ T11] kasan_save_free_info+0x3b/0x60 [ 19.943287][ T11] __kasan_slab_free+0x38/0x50 [ 19.943412][ T11] kmem_cache_free+0xf8/0x330 [ 19.943543][ T11] cleanup_net+0x5a8/0xa40 [ 19.943671][ T11] process_one_work+0xe55/0x16d0 [ 19.943797][ T11] worker_thread+0x58c/0xce0 [ 19.943922][ T11] kthread+0x28a/0x350 [ 19.944019][ T11] ret_from_fork+0x31/0x70 [ 19.944147][ T11] ret_from_fork_asm+0x1a/0x30 [ 19.944271][ T11] [ 19.944336][ T11] Last potentially related work creation: [ 19.944463][ T11] kasan_save_stack+0x24/0x50 [ 19.944589][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 19.944715][ T11] insert_work+0x34/0x230 [ 19.944808][ T11] __queue_work+0x5fd/0xa40 [ 19.944935][ T11] queue_delayed_work_on+0x8c/0xa0 [ 19.945064][ T11] __inet_insert_ifa+0x751/0xb10 [ 19.945195][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 19.945320][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 19.945454][ T11] netlink_rcv_skb+0x130/0x360 [ 19.945585][ T11] netlink_unicast+0x44b/0x710 [ 19.945707][ T11] netlink_sendmsg+0x723/0xbe0 [ 19.945833][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 19.945964][ T11] ___sys_sendmsg+0xee/0x170 [ 19.946093][ T11] __sys_sendmsg+0x109/0x1a0 [ 19.946218][ T11] do_syscall_64+0xc1/0x1d0 [ 19.946342][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.946506][ T11] [ 19.946569][ T11] Second to last potentially related work creation: [ 19.946720][ T11] kasan_save_stack+0x24/0x50 [ 19.946847][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 19.946973][ T11] insert_work+0x34/0x230 [ 19.947069][ T11] __queue_work+0x5fd/0xa40 [ 19.947192][ T11] queue_delayed_work_on+0x8c/0xa0 [ 19.947319][ T11] __inet_insert_ifa+0x751/0xb10 [ 19.947444][ T11] inetdev_event+0xb18/0xcf0 [ 19.947569][ T11] notifier_call_chain+0xcd/0x150 [ 19.947694][ T11] __dev_notify_flags+0xe6/0x250 [ 19.947821][ T11] dev_change_flags+0xec/0x160 [ 19.947948][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 19.948073][ T11] rtnl_newlink+0x6de/0xa80 [ 19.948197][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 19.948326][ T11] netlink_rcv_skb+0x130/0x360 [ 19.948449][ T11] netlink_unicast+0x44b/0x710 [ 19.948576][ T11] netlink_sendmsg+0x723/0xbe0 [ 19.948700][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 19.948824][ T11] ___sys_sendmsg+0xee/0x170 [ 19.948950][ T11] __sys_sendmsg+0x109/0x1a0 [ 19.949075][ T11] do_syscall_64+0xc1/0x1d0 [ 19.949201][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.949356][ T11] [ 19.949425][ T11] The buggy address belongs to the object at ffff888004d48040 [ 19.949425][ T11] which belongs to the cache net_namespace of size 6592 [ 19.949747][ T11] The buggy address is located 184 bytes inside of [ 19.949747][ T11] freed 6592-byte region [ffff888004d48040, ffff888004d49a00) [ 19.950050][ T11] [ 19.950114][ T11] The buggy address belongs to the physical page: [ 19.950268][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004d4d200 pfn:0x4d48 [ 19.950518][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 19.950704][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 19.950862][ T11] page_type: f5(slab) [ 19.950959][ T11] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 19.951184][ T11] raw: ffff888004d4d200 0000000000040003 00000001f5000000 0000000000000000 [ 19.951407][ T11] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 19.951626][ T11] head: ffff888004d4d200 0000000000040003 00000001f5000000 0000000000000000 [ 19.951845][ T11] head: 0080000000000003 ffffea0000135201 ffffffffffffffff 0000000000000000 [ 19.952067][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 19.952281][ T11] page dumped because: kasan: bad access detected [ 19.952435][ T11] [ 19.952503][ T11] Memory state around the buggy address: [ 19.952630][ T11] ffff888004d47f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 19.952809][ T11] ffff888004d48000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 19.952995][ T11] >ffff888004d48080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.953171][ T11] ^ [ 19.953355][ T11] ffff888004d48100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.953532][ T11] ffff888004d48180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.953712][ T11] ================================================================== [ 19.953915][ T11] Disabling lock debugging due to kernel taint