[ 12.286137][ T256] ip (256) used greatest stack depth: 24512 bytes left [ 22.109764][ T68] ================================================================== [ 22.109990][ T68] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 22.110189][ T68] Read of size 8 at addr ffff8880050000f8 by task kworker/u16:1/68 [ 22.110375][ T68] [ 22.110445][ T68] CPU: 1 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 22.110644][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 22.110801][ T68] Workqueue: netns cleanup_net [ 22.110936][ T68] Call Trace: [ 22.111035][ T68] [ 22.111102][ T68] dump_stack_lvl+0x82/0xd0 [ 22.111232][ T68] print_address_description.constprop.0+0x2c/0x3b0 [ 22.111391][ T68] ? cleanup_net+0x932/0xa40 [ 22.111515][ T68] print_report+0xb4/0x270 [ 22.111641][ T68] ? kasan_addr_to_slab+0x25/0x80 [ 22.111765][ T68] kasan_report+0xbd/0xf0 [ 22.111861][ T68] ? cleanup_net+0x932/0xa40 [ 22.111991][ T68] cleanup_net+0x932/0xa40 [ 22.112118][ T68] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 22.112248][ T68] ? __pfx_cleanup_net+0x10/0x10 [ 22.112373][ T68] ? trace_lock_acquire+0x148/0x1f0 [ 22.112500][ T68] ? lock_acquire+0x32/0xc0 [ 22.112625][ T68] ? process_one_work+0xe0b/0x16d0 [ 22.112755][ T68] process_one_work+0xe55/0x16d0 [ 22.112883][ T68] ? __pfx___lock_release+0x10/0x10 [ 22.113016][ T68] ? __pfx_process_one_work+0x10/0x10 [ 22.113145][ T68] ? assign_work+0x16c/0x240 [ 22.113270][ T68] worker_thread+0x58c/0xce0 [ 22.113397][ T68] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 22.113552][ T68] ? __pfx_worker_thread+0x10/0x10 [ 22.113686][ T68] ? __pfx_worker_thread+0x10/0x10 [ 22.113809][ T68] kthread+0x28a/0x350 [ 22.113905][ T68] ? __pfx_kthread+0x10/0x10 [ 22.114031][ T68] ret_from_fork+0x31/0x70 [ 22.114158][ T68] ? __pfx_kthread+0x10/0x10 [ 22.114283][ T68] ret_from_fork_asm+0x1a/0x30 [ 22.114414][ T68] [ 22.114511][ T68] [ 22.114574][ T68] Allocated by task 252: [ 22.114675][ T68] kasan_save_stack+0x24/0x50 [ 22.114803][ T68] kasan_save_track+0x14/0x30 [ 22.114924][ T68] __kasan_slab_alloc+0x59/0x70 [ 22.115046][ T68] kmem_cache_alloc_noprof+0x10b/0x350 [ 22.115171][ T68] copy_net_ns+0xc6/0x340 [ 22.115264][ T68] create_new_namespaces+0x35f/0x920 [ 22.115390][ T68] unshare_nsproxy_namespaces+0x8d/0x130 [ 22.115515][ T68] ksys_unshare+0x2a9/0x660 [ 22.115640][ T68] __x64_sys_unshare+0x31/0x40 [ 22.115763][ T68] do_syscall_64+0xc1/0x1d0 [ 22.115888][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 22.116044][ T68] [ 22.116110][ T68] Freed by task 68: [ 22.116204][ T68] kasan_save_stack+0x24/0x50 [ 22.116328][ T68] kasan_save_track+0x14/0x30 [ 22.116459][ T68] kasan_save_free_info+0x3b/0x60 [ 22.116588][ T68] __kasan_slab_free+0x38/0x50 [ 22.116713][ T68] kmem_cache_free+0xf8/0x330 [ 22.116839][ T68] cleanup_net+0x5a8/0xa40 [ 22.116962][ T68] process_one_work+0xe55/0x16d0 [ 22.117085][ T68] worker_thread+0x58c/0xce0 [ 22.117209][ T68] kthread+0x28a/0x350 [ 22.117303][ T68] ret_from_fork+0x31/0x70 [ 22.117426][ T68] ret_from_fork_asm+0x1a/0x30 [ 22.117555][ T68] [ 22.117621][ T68] Last potentially related work creation: [ 22.117745][ T68] kasan_save_stack+0x24/0x50 [ 22.117871][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 22.117996][ T68] insert_work+0x34/0x230 [ 22.118092][ T68] __queue_work+0x5fd/0xa40 [ 22.118217][ T68] queue_delayed_work_on+0x8c/0xa0 [ 22.118343][ T68] __inet_insert_ifa+0x751/0xb10 [ 22.118473][ T68] inet_rtm_newaddr+0x833/0xbd0 [ 22.118600][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 22.118730][ T68] netlink_rcv_skb+0x130/0x360 [ 22.118859][ T68] netlink_unicast+0x44b/0x710 [ 22.118984][ T68] netlink_sendmsg+0x723/0xbe0 [ 22.119113][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 22.119242][ T68] ___sys_sendmsg+0xee/0x170 [ 22.119371][ T68] __sys_sendmsg+0x109/0x1a0 [ 22.119501][ T68] do_syscall_64+0xc1/0x1d0 [ 22.119628][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 22.119784][ T68] [ 22.119850][ T68] Second to last potentially related work creation: [ 22.120001][ T68] kasan_save_stack+0x24/0x50 [ 22.120128][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 22.120256][ T68] insert_work+0x34/0x230 [ 22.120356][ T68] __queue_work+0x5fd/0xa40 [ 22.120480][ T68] queue_delayed_work_on+0x8c/0xa0 [ 22.120605][ T68] __inet_insert_ifa+0x751/0xb10 [ 22.120732][ T68] inet_rtm_newaddr+0x833/0xbd0 [ 22.120858][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 22.120984][ T68] netlink_rcv_skb+0x130/0x360 [ 22.121109][ T68] netlink_unicast+0x44b/0x710 [ 22.121236][ T68] netlink_sendmsg+0x723/0xbe0 [ 22.121366][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 22.121493][ T68] ___sys_sendmsg+0xee/0x170 [ 22.121616][ T68] __sys_sendmsg+0x109/0x1a0 [ 22.121743][ T68] do_syscall_64+0xc1/0x1d0 [ 22.121867][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 22.122021][ T68] [ 22.122086][ T68] The buggy address belongs to the object at ffff888005000040 [ 22.122086][ T68] which belongs to the cache net_namespace of size 6592 [ 22.122418][ T68] The buggy address is located 184 bytes inside of [ 22.122418][ T68] freed 6592-byte region [ffff888005000040, ffff888005001a00) [ 22.122718][ T68] [ 22.122781][ T68] The buggy address belongs to the physical page: [ 22.122935][ T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880050036c0 pfn:0x5000 [ 22.123188][ T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 22.123375][ T68] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 22.123535][ T68] page_type: f5(slab) [ 22.123635][ T68] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 22.123856][ T68] raw: ffff8880050036c0 0000000000040002 00000001f5000000 0000000000000000 [ 22.124077][ T68] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 22.124301][ T68] head: ffff8880050036c0 0000000000040002 00000001f5000000 0000000000000000 [ 22.124518][ T68] head: 0080000000000003 ffffea0000140001 ffffffffffffffff 0000000000000000 [ 22.124737][ T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 22.124958][ T68] page dumped because: kasan: bad access detected [ 22.125109][ T68] [ 22.125172][ T68] Memory state around the buggy address: [ 22.125293][ T68] ffff888004ffff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 22.125476][ T68] ffff888005000000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 22.125655][ T68] >ffff888005000080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.125866][ T68] ^ [ 22.126044][ T68] ffff888005000100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.126240][ T68] ffff888005000180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.126424][ T68] ================================================================== [ 22.126672][ T68] Disabling lock debugging due to kernel taint