[ 13.903930][ T295] ip (295) used greatest stack depth: 22960 bytes left [ 14.188695][ T297] eth3: renamed from tmp [ 15.164737][ T304] eth2: renamed from tmp [ 16.585233][ T314] eth0: renamed from tmp [ 16.986559][ T317] br0: port 1(eth0) entered blocking state [ 16.986973][ T317] br0: port 1(eth0) entered disabled state [ 16.987251][ T317] eth0: entered allmulticast mode [ 16.989770][ T317] eth0: entered promiscuous mode [ 16.991290][ T317] br0: port 1(eth0) entered blocking state [ 16.991581][ T317] br0: port 1(eth0) entered forwarding state [ 17.566042][ T321] eth1: renamed from tmp [ 17.974769][ T324] br0: port 2(eth1) entered blocking state [ 17.975010][ T324] br0: port 2(eth1) entered disabled state [ 17.975252][ T324] eth1: entered allmulticast mode [ 17.977548][ T324] eth1: entered promiscuous mode [ 17.978508][ T324] br0: port 2(eth1) entered blocking state [ 17.978753][ T324] br0: port 2(eth1) entered forwarding state [ 22.553640][ T64] br0: port 1(eth0) entered disabled state [ 22.651451][ T64] eth0 (unregistering): left allmulticast mode [ 22.651745][ T64] eth0 (unregistering): left promiscuous mode [ 22.651941][ T64] br0: port 1(eth0) entered disabled state [ 22.986256][ T64] ================================================================== [ 22.986470][ T64] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 22.986667][ T64] Read of size 8 at addr ffff88800c4280f8 by task kworker/u16:1/64 [ 22.986850][ T64] [ 22.986917][ T64] CPU: 0 UID: 0 PID: 64 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 22.987102][ T64] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 22.987258][ T64] Workqueue: netns cleanup_net [ 22.987389][ T64] Call Trace: [ 22.987485][ T64] [ 22.987549][ T64] dump_stack_lvl+0x82/0xd0 [ 22.987680][ T64] print_address_description.constprop.0+0x2c/0x3b0 [ 22.987837][ T64] ? cleanup_net+0xa5d/0xb90 [ 22.987961][ T64] print_report+0xb4/0x270 [ 22.988082][ T64] ? kasan_addr_to_slab+0x25/0x80 [ 22.988207][ T64] kasan_report+0xbd/0xf0 [ 22.988303][ T64] ? cleanup_net+0xa5d/0xb90 [ 22.988430][ T64] cleanup_net+0xa5d/0xb90 [ 22.988551][ T64] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 22.988685][ T64] ? __pfx_cleanup_net+0x10/0x10 [ 22.988808][ T64] ? trace_lock_acquire+0x148/0x1f0 [ 22.988933][ T64] ? lock_acquire+0x32/0xc0 [ 22.989055][ T64] ? process_one_work+0xe0b/0x16d0 [ 22.989182][ T64] process_one_work+0xe55/0x16d0 [ 22.989307][ T64] ? __pfx___lock_release+0x10/0x10 [ 22.989430][ T64] ? __pfx_process_one_work+0x10/0x10 [ 22.989553][ T64] ? assign_work+0x16c/0x240 [ 22.989678][ T64] worker_thread+0x58c/0xce0 [ 22.989801][ T64] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 22.989955][ T64] ? __pfx_worker_thread+0x10/0x10 [ 22.990079][ T64] ? __pfx_worker_thread+0x10/0x10 [ 22.990202][ T64] kthread+0x28a/0x350 [ 22.990297][ T64] ? __pfx_kthread+0x10/0x10 [ 22.990423][ T64] ret_from_fork+0x31/0x70 [ 22.990552][ T64] ? __pfx_kthread+0x10/0x10 [ 22.990676][ T64] ret_from_fork_asm+0x1a/0x30 [ 22.990806][ T64] [ 22.990901][ T64] [ 22.990966][ T64] Allocated by task 255: [ 22.991059][ T64] kasan_save_stack+0x24/0x50 [ 22.991186][ T64] kasan_save_track+0x14/0x30 [ 22.991312][ T64] __kasan_slab_alloc+0x59/0x70 [ 22.991436][ T64] kmem_cache_alloc_noprof+0x10b/0x350 [ 22.991560][ T64] copy_net_ns+0xc6/0x540 [ 22.991654][ T64] create_new_namespaces+0x35f/0x920 [ 22.991781][ T64] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 22.991904][ T64] ksys_unshare+0x2c4/0x6e0 [ 22.992028][ T64] __x64_sys_unshare+0x31/0x40 [ 22.992151][ T64] do_syscall_64+0xc1/0x1d0 [ 22.992273][ T64] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 22.992424][ T64] [ 22.992488][ T64] Freed by task 64: [ 22.992582][ T64] kasan_save_stack+0x24/0x50 [ 22.992711][ T64] kasan_save_track+0x14/0x30 [ 22.992832][ T64] kasan_save_free_info+0x3b/0x60 [ 22.992956][ T64] __kasan_slab_free+0x38/0x50 [ 22.993076][ T64] kmem_cache_free+0xf8/0x330 [ 22.993198][ T64] cleanup_net+0x5a8/0xb90 [ 22.993318][ T64] process_one_work+0xe55/0x16d0 [ 22.993439][ T64] worker_thread+0x58c/0xce0 [ 22.993561][ T64] kthread+0x28a/0x350 [ 22.993654][ T64] ret_from_fork+0x31/0x70 [ 22.993774][ T64] ret_from_fork_asm+0x1a/0x30 [ 22.993896][ T64] [ 22.993958][ T64] Last potentially related work creation: [ 22.994082][ T64] kasan_save_stack+0x24/0x50 [ 22.994210][ T64] __kasan_record_aux_stack+0x8e/0xa0 [ 22.994333][ T64] insert_work+0x34/0x230 [ 22.994427][ T64] __queue_work+0x5fd/0xa40 [ 22.994550][ T64] queue_delayed_work_on+0x8c/0xa0 [ 22.994678][ T64] __inet_insert_ifa+0x751/0xb10 [ 22.994806][ T64] inetdev_event+0xb18/0xcf0 [ 22.994932][ T64] notifier_call_chain+0xcd/0x150 [ 22.995056][ T64] __dev_notify_flags+0xe6/0x250 [ 22.995180][ T64] dev_change_flags+0xec/0x160 [ 22.995306][ T64] do_setlink.constprop.0+0x79d/0x2300 [ 22.995433][ T64] rtnl_newlink+0x6de/0xa80 [ 22.995554][ T64] rtnetlink_rcv_msg+0x712/0xc10 [ 22.995679][ T64] netlink_rcv_skb+0x130/0x360 [ 22.995807][ T64] netlink_unicast+0x44b/0x710 [ 22.995931][ T64] netlink_sendmsg+0x723/0xbe0 [ 22.996053][ T64] ____sys_sendmsg+0x7ac/0xa10 [ 22.996180][ T64] ___sys_sendmsg+0xee/0x170 [ 22.996305][ T64] __sys_sendmsg+0x109/0x1a0 [ 22.996433][ T64] do_syscall_64+0xc1/0x1d0 [ 22.996554][ T64] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 22.996722][ T64] [ 22.996789][ T64] The buggy address belongs to the object at ffff88800c428040 [ 22.996789][ T64] which belongs to the cache net_namespace of size 6528 [ 22.997119][ T64] The buggy address is located 184 bytes inside of [ 22.997119][ T64] freed 6528-byte region [ffff88800c428040, ffff88800c4299c0) [ 22.997421][ T64] [ 22.997485][ T64] The buggy address belongs to the physical page: [ 22.997636][ T64] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc428 [ 22.997849][ T64] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 22.998033][ T64] flags: 0x80000000000040(head|node=0|zone=1) [ 22.998194][ T64] page_type: f5(slab) [ 22.998290][ T64] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 22.998523][ T64] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 22.998752][ T64] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 22.998978][ T64] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 22.999199][ T64] head: 0080000000000003 ffffea0000310a01 ffffffffffffffff 0000000000000000 [ 22.999551][ T64] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 22.999768][ T64] page dumped because: kasan: bad access detected [ 22.999920][ T64] [ 22.999984][ T64] Memory state around the buggy address: [ 23.000218][ T64] ffff88800c427f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.000396][ T64] ffff88800c428000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.000633][ T64] >ffff88800c428080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.000810][ T64] ^ [ 23.000986][ T64] ffff88800c428100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.001217][ T64] ffff88800c428180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.001397][ T64] ================================================================== [ 23.001631][ T64] Disabling lock debugging due to kernel taint [ 23.081358][ T64] eth1: left allmulticast mode [ 23.081553][ T64] eth1: left promiscuous mode [ 23.081836][ T64] br0: port 2(eth1) entered disabled state [ 26.538113][ T401] eth1: renamed from tmp [ 27.418947][ T410] eth2: renamed from tmp