[ 32.132001][ T589] veth0: renamed from veth-rt-1 [ 33.118803][ T599] veth0: renamed from veth-rt-2 [ 39.111924][ T68] ================================================================== [ 39.112212][ T68] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 39.112412][ T68] Read of size 8 at addr ffff888009a980f8 by task kworker/u16:1/68 [ 39.112596][ T68] [ 39.112665][ T68] CPU: 3 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 39.112860][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 39.113028][ T68] Workqueue: netns cleanup_net [ 39.113163][ T68] Call Trace: [ 39.113264][ T68] [ 39.113333][ T68] dump_stack_lvl+0x82/0xd0 [ 39.113469][ T68] print_address_description.constprop.0+0x2c/0x3b0 [ 39.113631][ T68] ? cleanup_net+0xa5d/0xb90 [ 39.113762][ T68] print_report+0xb4/0x270 [ 39.113893][ T68] ? kasan_addr_to_slab+0x25/0x80 [ 39.114032][ T68] kasan_report+0xbd/0xf0 [ 39.114131][ T68] ? cleanup_net+0xa5d/0xb90 [ 39.114263][ T68] cleanup_net+0xa5d/0xb90 [ 39.114389][ T68] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 39.114518][ T68] ? __pfx_cleanup_net+0x10/0x10 [ 39.114645][ T68] ? trace_lock_acquire+0x148/0x1f0 [ 39.114772][ T68] ? lock_acquire+0x32/0xc0 [ 39.114899][ T68] ? process_one_work+0xe0b/0x16d0 [ 39.115033][ T68] process_one_work+0xe55/0x16d0 [ 39.115168][ T68] ? __pfx___lock_release+0x10/0x10 [ 39.115304][ T68] ? __pfx_process_one_work+0x10/0x10 [ 39.115442][ T68] ? assign_work+0x16c/0x240 [ 39.115574][ T68] worker_thread+0x58c/0xce0 [ 39.115708][ T68] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 39.115877][ T68] ? __pfx_worker_thread+0x10/0x10 [ 39.116007][ T68] ? __pfx_worker_thread+0x10/0x10 [ 39.116139][ T68] kthread+0x28a/0x350 [ 39.116241][ T68] ? __pfx_kthread+0x10/0x10 [ 39.116372][ T68] ret_from_fork+0x31/0x70 [ 39.116506][ T68] ? __pfx_kthread+0x10/0x10 [ 39.116638][ T68] ret_from_fork_asm+0x1a/0x30 [ 39.116775][ T68] [ 39.116876][ T68] [ 39.116944][ T68] Allocated by task 575: [ 39.117043][ T68] kasan_save_stack+0x24/0x50 [ 39.117176][ T68] kasan_save_track+0x14/0x30 [ 39.117305][ T68] __kasan_slab_alloc+0x59/0x70 [ 39.117429][ T68] kmem_cache_alloc_noprof+0x10b/0x350 [ 39.117560][ T68] copy_net_ns+0xc6/0x540 [ 39.117659][ T68] create_new_namespaces+0x35f/0x920 [ 39.117795][ T68] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 39.117927][ T68] ksys_unshare+0x2c4/0x6e0 [ 39.118058][ T68] __x64_sys_unshare+0x31/0x40 [ 39.118186][ T68] do_syscall_64+0xc1/0x1d0 [ 39.118318][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 39.118480][ T68] [ 39.118546][ T68] Freed by task 68: [ 39.118643][ T68] kasan_save_stack+0x24/0x50 [ 39.118775][ T68] kasan_save_track+0x14/0x30 [ 39.118901][ T68] kasan_save_free_info+0x3b/0x60 [ 39.119027][ T68] __kasan_slab_free+0x38/0x50 [ 39.119151][ T68] kmem_cache_free+0xf8/0x330 [ 39.119275][ T68] cleanup_net+0x5a8/0xb90 [ 39.119400][ T68] process_one_work+0xe55/0x16d0 [ 39.119526][ T68] worker_thread+0x58c/0xce0 [ 39.119652][ T68] kthread+0x28a/0x350 [ 39.119748][ T68] ret_from_fork+0x31/0x70 [ 39.119877][ T68] ret_from_fork_asm+0x1a/0x30 [ 39.120010][ T68] [ 39.120078][ T68] Last potentially related work creation: [ 39.120204][ T68] kasan_save_stack+0x24/0x50 [ 39.120333][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 39.120458][ T68] insert_work+0x34/0x230 [ 39.120557][ T68] __queue_work+0x5fd/0xa40 [ 39.120684][ T68] queue_delayed_work_on+0x8c/0xa0 [ 39.120815][ T68] __inet_insert_ifa+0x751/0xb10 [ 39.120950][ T68] inet_rtm_newaddr+0x833/0xbd0 [ 39.121080][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 39.121207][ T68] netlink_rcv_skb+0x130/0x360 [ 39.121337][ T68] netlink_unicast+0x44b/0x710 [ 39.121464][ T68] netlink_sendmsg+0x723/0xbe0 [ 39.121591][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 39.121721][ T68] ___sys_sendmsg+0xee/0x170 [ 39.121854][ T68] __sys_sendmsg+0x109/0x1a0 [ 39.121982][ T68] do_syscall_64+0xc1/0x1d0 [ 39.122114][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 39.122271][ T68] [ 39.122337][ T68] Second to last potentially related work creation: [ 39.122492][ T68] kasan_save_stack+0x24/0x50 [ 39.122619][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 39.122746][ T68] insert_work+0x34/0x230 [ 39.122843][ T68] __queue_work+0x5fd/0xa40 [ 39.122967][ T68] queue_delayed_work_on+0x8c/0xa0 [ 39.123094][ T68] __inet_insert_ifa+0x751/0xb10 [ 39.123222][ T68] inetdev_event+0xb18/0xcf0 [ 39.123348][ T68] notifier_call_chain+0xcd/0x150 [ 39.123474][ T68] __dev_notify_flags+0xe6/0x250 [ 39.123603][ T68] dev_change_flags+0xec/0x160 [ 39.123731][ T68] do_setlink.constprop.0+0x79d/0x2300 [ 39.123862][ T68] rtnl_newlink+0x6de/0xa80 [ 39.123994][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 39.124119][ T68] netlink_rcv_skb+0x130/0x360 [ 39.124245][ T68] netlink_unicast+0x44b/0x710 [ 39.124374][ T68] netlink_sendmsg+0x723/0xbe0 [ 39.124502][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 39.124626][ T68] ___sys_sendmsg+0xee/0x170 [ 39.124752][ T68] __sys_sendmsg+0x109/0x1a0 [ 39.124878][ T68] do_syscall_64+0xc1/0x1d0 [ 39.125004][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 39.125166][ T68] [ 39.125231][ T68] The buggy address belongs to the object at ffff888009a98040 [ 39.125231][ T68] which belongs to the cache net_namespace of size 6528 [ 39.125560][ T68] The buggy address is located 184 bytes inside of [ 39.125560][ T68] freed 6528-byte region [ffff888009a98040, ffff888009a999c0) [ 39.125867][ T68] [ 39.125933][ T68] The buggy address belongs to the physical page: [ 39.126084][ T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a98 [ 39.126306][ T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 39.126506][ T68] flags: 0x80000000000040(head|node=0|zone=1) [ 39.126681][ T68] page_type: f5(slab) [ 39.126782][ T68] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 39.127013][ T68] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 39.127234][ T68] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 39.127451][ T68] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 39.127662][ T68] head: 0080000000000003 ffffea000026a601 ffffffffffffffff 0000000000000000 [ 39.127882][ T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 39.128100][ T68] page dumped because: kasan: bad access detected [ 39.128257][ T68] [ 39.128321][ T68] Memory state around the buggy address: [ 39.128445][ T68] ffff888009a97f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.128630][ T68] ffff888009a98000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.128814][ T68] >ffff888009a98080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.128991][ T68] ^ [ 39.129167][ T68] ffff888009a98100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.129340][ T68] ffff888009a98180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.129516][ T68] ================================================================== [ 39.130187][ T68] Disabling lock debugging due to kernel taint