[ 14.041121][ T11] ================================================================== [ 14.041350][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 14.041546][ T11] Read of size 8 at addr ffff888012c900f8 by task kworker/u16:0/11 [ 14.041736][ T11] [ 14.041802][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 14.041996][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 14.042157][ T11] Workqueue: netns cleanup_net [ 14.042299][ T11] Call Trace: [ 14.042393][ T11] [ 14.042459][ T11] dump_stack_lvl+0x82/0xd0 [ 14.042594][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 14.042756][ T11] ? cleanup_net+0xa5d/0xb90 [ 14.042878][ T11] print_report+0xb4/0x270 [ 14.042999][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 14.043122][ T11] kasan_report+0xbd/0xf0 [ 14.043219][ T11] ? cleanup_net+0xa5d/0xb90 [ 14.043343][ T11] cleanup_net+0xa5d/0xb90 [ 14.043465][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 14.043592][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 14.043716][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 14.043843][ T11] ? lock_acquire+0x32/0xc0 [ 14.043967][ T11] ? process_one_work+0xe0b/0x16d0 [ 14.044111][ T11] process_one_work+0xe55/0x16d0 [ 14.044239][ T11] ? __pfx___lock_release+0x10/0x10 [ 14.044370][ T11] ? __pfx_process_one_work+0x10/0x10 [ 14.044503][ T11] ? assign_work+0x16c/0x240 [ 14.044628][ T11] worker_thread+0x58c/0xce0 [ 14.044760][ T11] ? __pfx_worker_thread+0x10/0x10 [ 14.044886][ T11] kthread+0x28a/0x350 [ 14.044986][ T11] ? __pfx_kthread+0x10/0x10 [ 14.045115][ T11] ret_from_fork+0x31/0x70 [ 14.045245][ T11] ? __pfx_kthread+0x10/0x10 [ 14.045372][ T11] ret_from_fork_asm+0x1a/0x30 [ 14.045507][ T11] [ 14.045604][ T11] [ 14.045675][ T11] Allocated by task 251: [ 14.045777][ T11] kasan_save_stack+0x24/0x50 [ 14.045907][ T11] kasan_save_track+0x14/0x30 [ 14.046037][ T11] __kasan_slab_alloc+0x59/0x70 [ 14.046163][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 14.046293][ T11] copy_net_ns+0xc6/0x540 [ 14.046396][ T11] create_new_namespaces+0x35f/0x920 [ 14.046524][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 14.046650][ T11] ksys_unshare+0x2c4/0x6e0 [ 14.046780][ T11] __x64_sys_unshare+0x31/0x40 [ 14.046904][ T11] do_syscall_64+0xc1/0x1d0 [ 14.047034][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.047205][ T11] [ 14.047271][ T11] Freed by task 11: [ 14.047374][ T11] kasan_save_stack+0x24/0x50 [ 14.047502][ T11] kasan_save_track+0x14/0x30 [ 14.047628][ T11] kasan_save_free_info+0x3b/0x60 [ 14.047758][ T11] __kasan_slab_free+0x38/0x50 [ 14.047882][ T11] kmem_cache_free+0xf8/0x330 [ 14.048009][ T11] cleanup_net+0x5a8/0xb90 [ 14.048136][ T11] process_one_work+0xe55/0x16d0 [ 14.048262][ T11] worker_thread+0x58c/0xce0 [ 14.048392][ T11] kthread+0x28a/0x350 [ 14.048487][ T11] ret_from_fork+0x31/0x70 [ 14.048612][ T11] ret_from_fork_asm+0x1a/0x30 [ 14.048742][ T11] [ 14.048808][ T11] Last potentially related work creation: [ 14.048935][ T11] kasan_save_stack+0x24/0x50 [ 14.049063][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 14.049191][ T11] insert_work+0x34/0x230 [ 14.049301][ T11] __queue_work+0x5fd/0xa40 [ 14.049427][ T11] queue_delayed_work_on+0x8c/0xa0 [ 14.049550][ T11] __inet_insert_ifa+0x751/0xb10 [ 14.049676][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 14.049799][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 14.049926][ T11] netlink_rcv_skb+0x130/0x360 [ 14.050052][ T11] netlink_unicast+0x44b/0x710 [ 14.050176][ T11] netlink_sendmsg+0x723/0xbe0 [ 14.050306][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 14.050435][ T11] ___sys_sendmsg+0xee/0x170 [ 14.050559][ T11] __sys_sendmsg+0x109/0x1a0 [ 14.050682][ T11] do_syscall_64+0xc1/0x1d0 [ 14.050807][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.050959][ T11] [ 14.051022][ T11] Second to last potentially related work creation: [ 14.051173][ T11] kasan_save_stack+0x24/0x50 [ 14.051302][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 14.051426][ T11] insert_work+0x34/0x230 [ 14.051519][ T11] __queue_work+0x5fd/0xa40 [ 14.051641][ T11] queue_delayed_work_on+0x8c/0xa0 [ 14.051764][ T11] __inet_insert_ifa+0x751/0xb10 [ 14.051889][ T11] inetdev_event+0xb18/0xcf0 [ 14.052029][ T11] notifier_call_chain+0xcd/0x150 [ 14.052158][ T11] __dev_notify_flags+0xe6/0x250 [ 14.052282][ T11] dev_change_flags+0xec/0x160 [ 14.052410][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 14.052539][ T11] rtnl_newlink+0x6de/0xa80 [ 14.052666][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 14.052793][ T11] netlink_rcv_skb+0x130/0x360 [ 14.052922][ T11] netlink_unicast+0x44b/0x710 [ 14.053047][ T11] netlink_sendmsg+0x723/0xbe0 [ 14.053179][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 14.053314][ T11] ___sys_sendmsg+0xee/0x170 [ 14.053440][ T11] __sys_sendmsg+0x109/0x1a0 [ 14.053564][ T11] do_syscall_64+0xc1/0x1d0 [ 14.053687][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.053840][ T11] [ 14.053904][ T11] The buggy address belongs to the object at ffff888012c90040 [ 14.053904][ T11] which belongs to the cache net_namespace of size 6528 [ 14.054249][ T11] The buggy address is located 184 bytes inside of [ 14.054249][ T11] freed 6528-byte region [ffff888012c90040, ffff888012c919c0) [ 14.054551][ T11] [ 14.054614][ T11] The buggy address belongs to the physical page: [ 14.054765][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888012c95140 pfn:0x12c90 [ 14.055021][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 14.055226][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 14.055386][ T11] page_type: f5(slab) [ 14.055485][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.055703][ T11] raw: ffff888012c95140 0000000000040003 00000001f5000000 0000000000000000 [ 14.055947][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.056167][ T11] head: ffff888012c95140 0000000000040003 00000001f5000000 0000000000000000 [ 14.056389][ T11] head: 0080000000000003 ffffea00004b2401 ffffffffffffffff 0000000000000000 [ 14.056609][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 14.056831][ T11] page dumped because: kasan: bad access detected [ 14.056987][ T11] [ 14.057051][ T11] Memory state around the buggy address: [ 14.057174][ T11] ffff888012c8ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.057367][ T11] ffff888012c90000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 14.057548][ T11] >ffff888012c90080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.057744][ T11] ^ [ 14.057926][ T11] ffff888012c90100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.058106][ T11] ffff888012c90180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.058307][ T11] ================================================================== [ 14.058564][ T11] Disabling lock debugging due to kernel taint