[ 11.481056][ T283] veth0: renamed from veth-rt-1 [ 12.255068][ T291] veth0: renamed from veth-rt-2 [ 52.627574][ T67] ================================================================== [ 52.627906][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 52.628221][ T67] Read of size 8 at addr ffff88800cdc80f8 by task kworker/u16:1/67 [ 52.628514][ T67] [ 52.628627][ T67] CPU: 1 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 52.628932][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 52.629194][ T67] Workqueue: netns cleanup_net [ 52.629413][ T67] Call Trace: [ 52.629568][ T67] <TASK> [ 52.629688][ T67] dump_stack_lvl+0x82/0xd0 [ 52.629902][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 52.630166][ T67] ? cleanup_net+0xa5d/0xb90 [ 52.630374][ T67] print_report+0xb4/0x270 [ 52.630574][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 52.630778][ T67] kasan_report+0xbd/0xf0 [ 52.630897][ T67] ? cleanup_net+0xa5d/0xb90 [ 52.631039][ T67] cleanup_net+0xa5d/0xb90 [ 52.631177][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 52.631356][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 52.631551][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 52.631760][ T67] ? lock_acquire+0x32/0xc0 [ 52.631964][ T67] ? process_one_work+0xe0b/0x16d0 [ 52.632176][ T67] process_one_work+0xe55/0x16d0 [ 52.632383][ T67] ? __pfx___lock_release+0x10/0x10 [ 52.632531][ T67] ? __pfx_process_one_work+0x10/0x10 [ 52.632673][ T67] ? assign_work+0x16c/0x240 [ 52.632823][ T67] worker_thread+0x58c/0xce0 [ 52.633026][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 52.633265][ T67] ? __pfx_worker_thread+0x10/0x10 [ 52.633416][ T67] ? __pfx_worker_thread+0x10/0x10 [ 52.633608][ T67] kthread+0x28a/0x350 [ 52.633774][ T67] ? __pfx_kthread+0x10/0x10 [ 52.633975][ T67] ret_from_fork+0x31/0x70 [ 52.634179][ T67] ? __pfx_kthread+0x10/0x10 [ 52.634378][ T67] ret_from_fork_asm+0x1a/0x30 [ 52.634585][ T67] </TASK> [ 52.634740][ T67] [ 52.634845][ T67] Allocated by task 268: [ 52.634994][ T67] kasan_save_stack+0x24/0x50 [ 52.635206][ T67] kasan_save_track+0x14/0x30 [ 52.635379][ T67] __kasan_slab_alloc+0x59/0x70 [ 52.635518][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 52.635660][ T67] copy_net_ns+0xc6/0x540 [ 52.635772][ T67] create_new_namespaces+0x35f/0x920 [ 52.635975][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 52.636174][ T67] ksys_unshare+0x2c4/0x6e0 [ 52.636377][ T67] __x64_sys_unshare+0x31/0x40 [ 52.636579][ T67] do_syscall_64+0xc1/0x1d0 [ 52.636786][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 52.637035][ T67] [ 52.637140][ T67] Freed by task 67: [ 52.637287][ T67] kasan_save_stack+0x24/0x50 [ 52.637436][ T67] kasan_save_track+0x14/0x30 [ 52.637575][ T67] kasan_save_free_info+0x3b/0x60 [ 52.637713][ T67] __kasan_slab_free+0x38/0x50 [ 52.637855][ T67] kmem_cache_free+0xf8/0x330 [ 52.637994][ T67] cleanup_net+0x5a8/0xb90 [ 52.638130][ T67] process_one_work+0xe55/0x16d0 [ 52.638275][ T67] worker_thread+0x58c/0xce0 [ 52.638474][ T67] kthread+0x28a/0x350 [ 52.638604][ T67] ret_from_fork+0x31/0x70 [ 52.638745][ T67] ret_from_fork_asm+0x1a/0x30 [ 52.638883][ T67] [ 52.638955][ T67] Last potentially related work creation: [ 52.639093][ T67] kasan_save_stack+0x24/0x50 [ 52.639236][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 52.639388][ T67] insert_work+0x34/0x230 [ 52.639540][ T67] __queue_work+0x5fd/0xa40 [ 52.639742][ T67] queue_delayed_work_on+0x8c/0xa0 [ 52.639944][ T67] __inet_insert_ifa+0x751/0xb10 [ 52.640147][ T67] inetdev_event+0xb18/0xcf0 [ 52.640349][ T67] notifier_call_chain+0xcd/0x150 [ 52.640555][ T67] __dev_notify_flags+0xe6/0x250 [ 52.640762][ T67] dev_change_flags+0xec/0x160 [ 52.640960][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 52.641168][ T67] rtnl_newlink+0x6de/0xa80 [ 52.641373][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 52.641580][ T67] netlink_rcv_skb+0x130/0x360 [ 52.641791][ T67] netlink_unicast+0x44b/0x710 [ 52.641991][ T67] netlink_sendmsg+0x723/0xbe0 [ 52.642193][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 52.642400][ T67] ___sys_sendmsg+0xee/0x170 [ 52.642602][ T67] __sys_sendmsg+0x109/0x1a0 [ 52.642807][ T67] do_syscall_64+0xc1/0x1d0 [ 52.643011][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 52.643264][ T67] [ 52.643369][ T67] The buggy address belongs to the object at ffff88800cdc8040 [ 52.643369][ T67] which belongs to the cache net_namespace of size 6528 [ 52.643911][ T67] The buggy address is located 184 bytes inside of [ 52.643911][ T67] freed 6528-byte region [ffff88800cdc8040, ffff88800cdc99c0) [ 52.644396][ T67] [ 52.644500][ T67] The buggy address belongs to the physical page: [ 52.644749][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcdc8 [ 52.645111][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 52.645420][ T67] flags: 0x80000000000040(head|node=0|zone=1) [ 52.645684][ T67] page_type: f5(slab) [ 52.645840][ T67] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 52.646101][ T67] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 52.646381][ T67] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 52.646736][ T67] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 52.647084][ T67] head: 0080000000000003 ffffea0000337201 ffffffffffffffff 0000000000000000 [ 52.647393][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 52.647719][ T67] page dumped because: kasan: bad access detected [ 52.647889][ T67] [ 52.647958][ T67] Memory state around the buggy address: [ 52.648098][ T67] ffff88800cdc7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 52.648310][ T67] ffff88800cdc8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 52.648539][ T67] >ffff88800cdc8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.648834][ T67] ^ [ 52.649121][ T67] ffff88800cdc8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.649409][ T67] ffff88800cdc8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.649683][ T67] ================================================================== [ 52.650027][ T67] Disabling lock debugging due to kernel taint