[ 10.281095][ T264] ip (264) used greatest stack depth: 23456 bytes left [ 13.212336][ T11] ================================================================== [ 13.212666][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.212863][ T11] Read of size 8 at addr ffff8880095700f8 by task kworker/u16:0/11 [ 13.213041][ T11] [ 13.213108][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 13.213306][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.213460][ T11] Workqueue: netns cleanup_net [ 13.213590][ T11] Call Trace: [ 13.213685][ T11] [ 13.213751][ T11] dump_stack_lvl+0x82/0xd0 [ 13.213881][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 13.214041][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.214168][ T11] print_report+0xb4/0x270 [ 13.214295][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 13.214417][ T11] kasan_report+0xbd/0xf0 [ 13.214513][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.214639][ T11] cleanup_net+0xa5d/0xb90 [ 13.214762][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.214890][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 13.215015][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 13.215141][ T11] ? lock_acquire+0x32/0xc0 [ 13.215265][ T11] ? process_one_work+0xe0b/0x16d0 [ 13.215391][ T11] process_one_work+0xe55/0x16d0 [ 13.215516][ T11] ? __pfx___lock_release+0x10/0x10 [ 13.215640][ T11] ? __pfx_process_one_work+0x10/0x10 [ 13.215768][ T11] ? assign_work+0x16c/0x240 [ 13.215893][ T11] worker_thread+0x58c/0xce0 [ 13.216018][ T11] ? __pfx_worker_thread+0x10/0x10 [ 13.216138][ T11] kthread+0x28a/0x350 [ 13.216233][ T11] ? __pfx_kthread+0x10/0x10 [ 13.216359][ T11] ret_from_fork+0x31/0x70 [ 13.216481][ T11] ? __pfx_kthread+0x10/0x10 [ 13.216606][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.216738][ T11] [ 13.216834][ T11] [ 13.216897][ T11] Allocated by task 259: [ 13.216993][ T11] kasan_save_stack+0x24/0x50 [ 13.217119][ T11] kasan_save_track+0x14/0x30 [ 13.217256][ T11] __kasan_slab_alloc+0x59/0x70 [ 13.217381][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.217505][ T11] copy_net_ns+0xc6/0x540 [ 13.217597][ T11] create_new_namespaces+0x35f/0x920 [ 13.217720][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.217846][ T11] ksys_unshare+0x2c4/0x6e0 [ 13.217972][ T11] __x64_sys_unshare+0x31/0x40 [ 13.218095][ T11] do_syscall_64+0xc1/0x1d0 [ 13.218218][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.218372][ T11] [ 13.218438][ T11] Freed by task 11: [ 13.218527][ T11] kasan_save_stack+0x24/0x50 [ 13.218652][ T11] kasan_save_track+0x14/0x30 [ 13.218777][ T11] kasan_save_free_info+0x3b/0x60 [ 13.218902][ T11] __kasan_slab_free+0x38/0x50 [ 13.219028][ T11] kmem_cache_free+0xf8/0x330 [ 13.219153][ T11] cleanup_net+0x5a8/0xb90 [ 13.219276][ T11] process_one_work+0xe55/0x16d0 [ 13.219398][ T11] worker_thread+0x58c/0xce0 [ 13.219520][ T11] kthread+0x28a/0x350 [ 13.219612][ T11] ret_from_fork+0x31/0x70 [ 13.219733][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.219858][ T11] [ 13.219919][ T11] Last potentially related work creation: [ 13.220047][ T11] kasan_save_stack+0x24/0x50 [ 13.220177][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.220303][ T11] insert_work+0x34/0x230 [ 13.220398][ T11] __queue_work+0x5fd/0xa40 [ 13.220527][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.220652][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.220778][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 13.220906][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.221035][ T11] netlink_rcv_skb+0x130/0x360 [ 13.221163][ T11] netlink_unicast+0x44b/0x710 [ 13.221288][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.221413][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.221540][ T11] ___sys_sendmsg+0xee/0x170 [ 13.221663][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.221803][ T11] do_syscall_64+0xc1/0x1d0 [ 13.221929][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.222084][ T11] [ 13.222149][ T11] Second to last potentially related work creation: [ 13.222307][ T11] kasan_save_stack+0x24/0x50 [ 13.222433][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.222558][ T11] insert_work+0x34/0x230 [ 13.222652][ T11] __queue_work+0x5fd/0xa40 [ 13.222777][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.222899][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.223025][ T11] inetdev_event+0xb18/0xcf0 [ 13.223148][ T11] notifier_call_chain+0xcd/0x150 [ 13.223275][ T11] __dev_notify_flags+0xe6/0x250 [ 13.223400][ T11] dev_change_flags+0xec/0x160 [ 13.223523][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 13.223649][ T11] rtnl_newlink+0x6de/0xa80 [ 13.223775][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.223903][ T11] netlink_rcv_skb+0x130/0x360 [ 13.224028][ T11] netlink_unicast+0x44b/0x710 [ 13.224158][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.224285][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.224411][ T11] ___sys_sendmsg+0xee/0x170 [ 13.224536][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.224658][ T11] do_syscall_64+0xc1/0x1d0 [ 13.224785][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.224942][ T11] [ 13.225008][ T11] The buggy address belongs to the object at ffff888009570040 [ 13.225008][ T11] which belongs to the cache net_namespace of size 6528 [ 13.225337][ T11] The buggy address is located 184 bytes inside of [ 13.225337][ T11] freed 6528-byte region [ffff888009570040, ffff8880095719c0) [ 13.225632][ T11] [ 13.225696][ T11] The buggy address belongs to the physical page: [ 13.225850][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009573640 pfn:0x9570 [ 13.226101][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.226299][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.226461][ T11] page_type: f5(slab) [ 13.226559][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.226779][ T11] raw: ffff888009573640 0000000000040002 00000001f5000000 0000000000000000 [ 13.226998][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.227227][ T11] head: ffff888009573640 0000000000040002 00000001f5000000 0000000000000000 [ 13.227443][ T11] head: 0080000000000003 ffffea0000255c01 ffffffffffffffff 0000000000000000 [ 13.227661][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.227877][ T11] page dumped because: kasan: bad access detected [ 13.228051][ T11] [ 13.228114][ T11] Memory state around the buggy address: [ 13.228235][ T11] ffff88800956ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.228421][ T11] ffff888009570000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.228597][ T11] >ffff888009570080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.228784][ T11] ^ [ 13.228960][ T11] ffff888009570100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.229135][ T11] ffff888009570180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.229311][ T11] ================================================================== [ 13.229512][ T11] Disabling lock debugging due to kernel taint [ 23.358696][ T407] GACT probability NOT on