[ 14.679506][ T296] eth3: renamed from tmp [ 14.689241][ T296] ip (296) used greatest stack depth: 24152 bytes left [ 15.674719][ T304] eth2: renamed from tmp [ 17.099654][ T315] eth0: renamed from tmp [ 17.531684][ T318] br0: port 1(eth0) entered blocking state [ 17.532072][ T318] br0: port 1(eth0) entered disabled state [ 17.532863][ T318] eth0: entered allmulticast mode [ 17.534092][ T318] eth0: entered promiscuous mode [ 17.535582][ T318] br0: port 1(eth0) entered blocking state [ 17.535898][ T318] br0: port 1(eth0) entered forwarding state [ 17.543877][ T318] ip (318) used greatest stack depth: 23976 bytes left [ 18.113638][ T322] eth1: renamed from tmp [ 18.533084][ T325] br0: port 2(eth1) entered blocking state [ 18.533437][ T325] br0: port 2(eth1) entered disabled state [ 18.533684][ T325] eth1: entered allmulticast mode [ 18.534860][ T325] eth1: entered promiscuous mode [ 18.535822][ T325] br0: port 2(eth1) entered blocking state [ 18.536063][ T325] br0: port 2(eth1) entered forwarding state [ 23.112041][ T66] br0: port 1(eth0) entered disabled state [ 23.225143][ T66] eth0 (unregistering): left allmulticast mode [ 23.225639][ T66] eth0 (unregistering): left promiscuous mode [ 23.225836][ T66] br0: port 1(eth0) entered disabled state [ 23.528621][ T66] ================================================================== [ 23.528837][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 23.529032][ T66] Read of size 8 at addr ffff888004f980f8 by task kworker/u16:1/66 [ 23.529211][ T66] [ 23.529276][ T66] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 23.529472][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.529630][ T66] Workqueue: netns cleanup_net [ 23.529760][ T66] Call Trace: [ 23.529855][ T66] [ 23.529921][ T66] dump_stack_lvl+0x82/0xd0 [ 23.530059][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 23.530221][ T66] ? cleanup_net+0xa5d/0xb90 [ 23.530351][ T66] print_report+0xb4/0x270 [ 23.530475][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 23.530601][ T66] kasan_report+0xbd/0xf0 [ 23.530695][ T66] ? cleanup_net+0xa5d/0xb90 [ 23.530821][ T66] cleanup_net+0xa5d/0xb90 [ 23.530945][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 23.531077][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 23.531200][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 23.531326][ T66] ? lock_acquire+0x32/0xc0 [ 23.531450][ T66] ? process_one_work+0xe0b/0x16d0 [ 23.531581][ T66] process_one_work+0xe55/0x16d0 [ 23.531709][ T66] ? __pfx___lock_release+0x10/0x10 [ 23.531833][ T66] ? __pfx_process_one_work+0x10/0x10 [ 23.531963][ T66] ? assign_work+0x16c/0x240 [ 23.532088][ T66] worker_thread+0x58c/0xce0 [ 23.532210][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 23.532364][ T66] ? __pfx_worker_thread+0x10/0x10 [ 23.532491][ T66] ? __pfx_worker_thread+0x10/0x10 [ 23.532616][ T66] kthread+0x28a/0x350 [ 23.532720][ T66] ? __pfx_kthread+0x10/0x10 [ 23.532842][ T66] ret_from_fork+0x31/0x70 [ 23.532971][ T66] ? __pfx_kthread+0x10/0x10 [ 23.533096][ T66] ret_from_fork_asm+0x1a/0x30 [ 23.533226][ T66] [ 23.533322][ T66] [ 23.533384][ T66] Allocated by task 255: [ 23.533477][ T66] kasan_save_stack+0x24/0x50 [ 23.533606][ T66] kasan_save_track+0x14/0x30 [ 23.533730][ T66] __kasan_slab_alloc+0x59/0x70 [ 23.533853][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 23.533977][ T66] copy_net_ns+0xc6/0x540 [ 23.534071][ T66] create_new_namespaces+0x35f/0x920 [ 23.534198][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 23.534323][ T66] ksys_unshare+0x2c4/0x6e0 [ 23.534449][ T66] __x64_sys_unshare+0x31/0x40 [ 23.534572][ T66] do_syscall_64+0xc1/0x1d0 [ 23.534700][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.534855][ T66] [ 23.534917][ T66] Freed by task 66: [ 23.535009][ T66] kasan_save_stack+0x24/0x50 [ 23.535132][ T66] kasan_save_track+0x14/0x30 [ 23.535253][ T66] kasan_save_free_info+0x3b/0x60 [ 23.535379][ T66] __kasan_slab_free+0x38/0x50 [ 23.535499][ T66] kmem_cache_free+0xf8/0x330 [ 23.535625][ T66] cleanup_net+0x5a8/0xb90 [ 23.535747][ T66] process_one_work+0xe55/0x16d0 [ 23.535869][ T66] worker_thread+0x58c/0xce0 [ 23.535991][ T66] kthread+0x28a/0x350 [ 23.536086][ T66] ret_from_fork+0x31/0x70 [ 23.536206][ T66] ret_from_fork_asm+0x1a/0x30 [ 23.536329][ T66] [ 23.536392][ T66] Last potentially related work creation: [ 23.536536][ T66] kasan_save_stack+0x24/0x50 [ 23.536665][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 23.536789][ T66] insert_work+0x34/0x230 [ 23.536887][ T66] __queue_work+0x5fd/0xa40 [ 23.537015][ T66] queue_delayed_work_on+0x8c/0xa0 [ 23.537136][ T66] __inet_insert_ifa+0x751/0xb10 [ 23.537263][ T66] inetdev_event+0xb18/0xcf0 [ 23.537386][ T66] notifier_call_chain+0xcd/0x150 [ 23.537513][ T66] __dev_notify_flags+0xe6/0x250 [ 23.537641][ T66] dev_change_flags+0xec/0x160 [ 23.537762][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 23.537891][ T66] rtnl_newlink+0x6de/0xa80 [ 23.538016][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 23.538141][ T66] netlink_rcv_skb+0x130/0x360 [ 23.538272][ T66] netlink_unicast+0x44b/0x710 [ 23.538397][ T66] netlink_sendmsg+0x723/0xbe0 [ 23.538536][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 23.538672][ T66] ___sys_sendmsg+0xee/0x170 [ 23.538798][ T66] __sys_sendmsg+0x109/0x1a0 [ 23.538949][ T66] do_syscall_64+0xc1/0x1d0 [ 23.539075][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.539230][ T66] [ 23.539294][ T66] The buggy address belongs to the object at ffff888004f98040 [ 23.539294][ T66] which belongs to the cache net_namespace of size 6528 [ 23.539626][ T66] The buggy address is located 184 bytes inside of [ 23.539626][ T66] freed 6528-byte region [ffff888004f98040, ffff888004f999c0) [ 23.539919][ T66] [ 23.539982][ T66] The buggy address belongs to the physical page: [ 23.540133][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4f98 [ 23.540361][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 23.540552][ T66] flags: 0x80000000000040(head|node=0|zone=1) [ 23.540711][ T66] page_type: f5(slab) [ 23.540814][ T66] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 23.541033][ T66] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 23.541258][ T66] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 23.541477][ T66] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 23.541762][ T66] head: 0080000000000003 ffffea000013e601 ffffffffffffffff 0000000000000000 [ 23.541983][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 23.542261][ T66] page dumped because: kasan: bad access detected [ 23.542419][ T66] [ 23.542483][ T66] Memory state around the buggy address: [ 23.542604][ T66] ffff888004f97f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.542843][ T66] ffff888004f98000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.543073][ T66] >ffff888004f98080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.543251][ T66] ^ [ 23.543428][ T66] ffff888004f98100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.543604][ T66] ffff888004f98180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.543780][ T66] ================================================================== [ 23.543978][ T66] Disabling lock debugging due to kernel taint [ 23.631418][ T66] eth1: left allmulticast mode [ 23.631583][ T66] eth1: left promiscuous mode [ 23.631825][ T66] br0: port 2(eth1) entered disabled state [ 27.156997][ T402] eth1: renamed from tmp [ 28.063130][ T411] eth2: renamed from tmp