[ 13.806677][ T67] ================================================================== [ 13.806922][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.807138][ T67] Read of size 8 at addr ffff88800a5000f8 by task kworker/u16:1/67 [ 13.807343][ T67] [ 13.807414][ T67] CPU: 2 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 13.807619][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.807791][ T67] Workqueue: netns cleanup_net [ 13.807937][ T67] Call Trace: [ 13.808043][ T67] [ 13.808116][ T67] dump_stack_lvl+0x82/0xd0 [ 13.808260][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 13.808440][ T67] ? cleanup_net+0xa5d/0xb90 [ 13.808580][ T67] print_report+0xb4/0x270 [ 13.808719][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 13.808859][ T67] kasan_report+0xbd/0xf0 [ 13.808970][ T67] ? cleanup_net+0xa5d/0xb90 [ 13.809111][ T67] cleanup_net+0xa5d/0xb90 [ 13.809252][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.809398][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 13.809544][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 13.809685][ T67] ? lock_acquire+0x32/0xc0 [ 13.809824][ T67] ? process_one_work+0xe0b/0x16d0 [ 13.809965][ T67] process_one_work+0xe55/0x16d0 [ 13.810105][ T67] ? __pfx___lock_release+0x10/0x10 [ 13.810240][ T67] ? __pfx_process_one_work+0x10/0x10 [ 13.810381][ T67] ? assign_work+0x16c/0x240 [ 13.810530][ T67] worker_thread+0x58c/0xce0 [ 13.810670][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 13.810838][ T67] ? __pfx_worker_thread+0x10/0x10 [ 13.810980][ T67] ? __pfx_worker_thread+0x10/0x10 [ 13.811119][ T67] kthread+0x28a/0x350 [ 13.811227][ T67] ? __pfx_kthread+0x10/0x10 [ 13.811363][ T67] ret_from_fork+0x31/0x70 [ 13.811496][ T67] ? __pfx_kthread+0x10/0x10 [ 13.811630][ T67] ret_from_fork_asm+0x1a/0x30 [ 13.811782][ T67] [ 13.811887][ T67] [ 13.811957][ T67] Allocated by task 258: [ 13.812065][ T67] kasan_save_stack+0x24/0x50 [ 13.812207][ T67] kasan_save_track+0x14/0x30 [ 13.812354][ T67] __kasan_slab_alloc+0x59/0x70 [ 13.812495][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.812636][ T67] copy_net_ns+0xc6/0x540 [ 13.812748][ T67] create_new_namespaces+0x35f/0x920 [ 13.812887][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.813024][ T67] ksys_unshare+0x2c4/0x6e0 [ 13.813162][ T67] __x64_sys_unshare+0x31/0x40 [ 13.813298][ T67] do_syscall_64+0xc1/0x1d0 [ 13.813441][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.813615][ T67] [ 13.813689][ T67] Freed by task 67: [ 13.813793][ T67] kasan_save_stack+0x24/0x50 [ 13.813931][ T67] kasan_save_track+0x14/0x30 [ 13.814079][ T67] kasan_save_free_info+0x3b/0x60 [ 13.814218][ T67] __kasan_slab_free+0x38/0x50 [ 13.814356][ T67] kmem_cache_free+0xf8/0x330 [ 13.814500][ T67] cleanup_net+0x5a8/0xb90 [ 13.814638][ T67] process_one_work+0xe55/0x16d0 [ 13.814779][ T67] worker_thread+0x58c/0xce0 [ 13.814920][ T67] kthread+0x28a/0x350 [ 13.815026][ T67] ret_from_fork+0x31/0x70 [ 13.815169][ T67] ret_from_fork_asm+0x1a/0x30 [ 13.815307][ T67] [ 13.815380][ T67] Last potentially related work creation: [ 13.815519][ T67] kasan_save_stack+0x24/0x50 [ 13.815659][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 13.815805][ T67] insert_work+0x34/0x230 [ 13.815913][ T67] __queue_work+0x5fd/0xa40 [ 13.816052][ T67] queue_delayed_work_on+0x8c/0xa0 [ 13.816195][ T67] __inet_insert_ifa+0x751/0xb10 [ 13.816334][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 13.816475][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 13.816613][ T67] netlink_rcv_skb+0x130/0x360 [ 13.816763][ T67] netlink_unicast+0x44b/0x710 [ 13.816907][ T67] netlink_sendmsg+0x723/0xbe0 [ 13.817048][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 13.817190][ T67] ___sys_sendmsg+0xee/0x170 [ 13.817338][ T67] __sys_sendmsg+0x109/0x1a0 [ 13.817481][ T67] do_syscall_64+0xc1/0x1d0 [ 13.817621][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.817795][ T67] [ 13.817867][ T67] Second to last potentially related work creation: [ 13.818037][ T67] kasan_save_stack+0x24/0x50 [ 13.818178][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 13.818317][ T67] insert_work+0x34/0x230 [ 13.818422][ T67] __queue_work+0x5fd/0xa40 [ 13.818557][ T67] queue_delayed_work_on+0x8c/0xa0 [ 13.818697][ T67] __inet_insert_ifa+0x751/0xb10 [ 13.818841][ T67] inetdev_event+0xb18/0xcf0 [ 13.818981][ T67] notifier_call_chain+0xcd/0x150 [ 13.819123][ T67] __dev_notify_flags+0xe6/0x250 [ 13.819266][ T67] dev_change_flags+0xec/0x160 [ 13.819405][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 13.819548][ T67] rtnl_newlink+0x6de/0xa80 [ 13.819695][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 13.819831][ T67] netlink_rcv_skb+0x130/0x360 [ 13.819967][ T67] netlink_unicast+0x44b/0x710 [ 13.820108][ T67] netlink_sendmsg+0x723/0xbe0 [ 13.820246][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 13.820385][ T67] ___sys_sendmsg+0xee/0x170 [ 13.820518][ T67] __sys_sendmsg+0x109/0x1a0 [ 13.820653][ T67] do_syscall_64+0xc1/0x1d0 [ 13.820787][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.820951][ T67] [ 13.821018][ T67] The buggy address belongs to the object at ffff88800a500040 [ 13.821018][ T67] which belongs to the cache net_namespace of size 6528 [ 13.821373][ T67] The buggy address is located 184 bytes inside of [ 13.821373][ T67] freed 6528-byte region [ffff88800a500040, ffff88800a5019c0) [ 13.821695][ T67] [ 13.821764][ T67] The buggy address belongs to the physical page: [ 13.821925][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a503640 pfn:0xa500 [ 13.822198][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.822417][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.822597][ T67] page_type: f5(slab) [ 13.822708][ T67] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.822963][ T67] raw: ffff88800a503640 0000000000040002 00000001f5000000 0000000000000000 [ 13.823211][ T67] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.823463][ T67] head: ffff88800a503640 0000000000040002 00000001f5000000 0000000000000000 [ 13.823705][ T67] head: 0080000000000003 ffffea0000294001 ffffffffffffffff 0000000000000000 [ 13.823944][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.824195][ T67] page dumped because: kasan: bad access detected [ 13.824363][ T67] [ 13.824432][ T67] Memory state around the buggy address: [ 13.824571][ T67] ffff88800a4fff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.824768][ T67] ffff88800a500000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.824973][ T67] >ffff88800a500080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.825170][ T67] ^ [ 13.825371][ T67] ffff88800a500100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.825576][ T67] ffff88800a500180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.825776][ T67] ================================================================== [ 13.826040][ T67] Disabling lock debugging due to kernel taint [ 24.678133][ T409] GACT probability NOT on