[ 92.398736][ T11] ================================================================== [ 92.399023][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 92.399205][ T11] Read of size 8 at addr ffff888004ee00f8 by task kworker/u16:0/11 [ 92.399379][ T11] [ 92.399441][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 92.399626][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 92.399774][ T11] Workqueue: netns cleanup_net [ 92.399902][ T11] Call Trace: [ 92.399993][ T11] [ 92.400056][ T11] dump_stack_lvl+0x82/0xd0 [ 92.400179][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 92.400357][ T11] ? cleanup_net+0xa5d/0xb90 [ 92.400481][ T11] print_report+0xb4/0x270 [ 92.400604][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 92.400730][ T11] kasan_report+0xbd/0xf0 [ 92.400825][ T11] ? cleanup_net+0xa5d/0xb90 [ 92.400951][ T11] cleanup_net+0xa5d/0xb90 [ 92.401072][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 92.401198][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 92.401322][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 92.401445][ T11] ? lock_acquire+0x32/0xc0 [ 92.401568][ T11] ? process_one_work+0xe0b/0x16d0 [ 92.401692][ T11] process_one_work+0xe55/0x16d0 [ 92.401818][ T11] ? __pfx___lock_release+0x10/0x10 [ 92.401943][ T11] ? __pfx_process_one_work+0x10/0x10 [ 92.402067][ T11] ? assign_work+0x16c/0x240 [ 92.402188][ T11] worker_thread+0x58c/0xce0 [ 92.402321][ T11] ? __pfx_worker_thread+0x10/0x10 [ 92.402446][ T11] kthread+0x28a/0x350 [ 92.402540][ T11] ? __pfx_kthread+0x10/0x10 [ 92.402662][ T11] ret_from_fork+0x31/0x70 [ 92.402783][ T11] ? __pfx_kthread+0x10/0x10 [ 92.402908][ T11] ret_from_fork_asm+0x1a/0x30 [ 92.403037][ T11] [ 92.403130][ T11] [ 92.403193][ T11] Allocated by task 258: [ 92.403285][ T11] kasan_save_stack+0x24/0x50 [ 92.403411][ T11] kasan_save_track+0x14/0x30 [ 92.403542][ T11] __kasan_slab_alloc+0x59/0x70 [ 92.403662][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 92.403782][ T11] copy_net_ns+0xc6/0x540 [ 92.403874][ T11] create_new_namespaces+0x35f/0x920 [ 92.403996][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 92.404116][ T11] ksys_unshare+0x2c4/0x6e0 [ 92.404238][ T11] __x64_sys_unshare+0x31/0x40 [ 92.404377][ T11] do_syscall_64+0xc1/0x1d0 [ 92.404500][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 92.404662][ T11] [ 92.404732][ T11] Freed by task 11: [ 92.404825][ T11] kasan_save_stack+0x24/0x50 [ 92.404949][ T11] kasan_save_track+0x14/0x30 [ 92.405068][ T11] kasan_save_free_info+0x3b/0x60 [ 92.405191][ T11] __kasan_slab_free+0x38/0x50 [ 92.405314][ T11] kmem_cache_free+0xf8/0x330 [ 92.405435][ T11] cleanup_net+0x5a8/0xb90 [ 92.405556][ T11] process_one_work+0xe55/0x16d0 [ 92.405676][ T11] worker_thread+0x58c/0xce0 [ 92.405797][ T11] kthread+0x28a/0x350 [ 92.405901][ T11] ret_from_fork+0x31/0x70 [ 92.406020][ T11] ret_from_fork_asm+0x1a/0x30 [ 92.406138][ T11] [ 92.406199][ T11] Last potentially related work creation: [ 92.406346][ T11] kasan_save_stack+0x24/0x50 [ 92.406470][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 92.406593][ T11] insert_work+0x34/0x230 [ 92.406685][ T11] __queue_work+0x5fd/0xa40 [ 92.406808][ T11] queue_delayed_work_on+0x8c/0xa0 [ 92.406935][ T11] __inet_insert_ifa+0x751/0xb10 [ 92.407060][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 92.407183][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 92.407308][ T11] netlink_rcv_skb+0x130/0x360 [ 92.407432][ T11] netlink_unicast+0x44b/0x710 [ 92.407554][ T11] netlink_sendmsg+0x723/0xbe0 [ 92.407676][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 92.407801][ T11] ___sys_sendmsg+0xee/0x170 [ 92.407924][ T11] __sys_sendmsg+0x109/0x1a0 [ 92.408047][ T11] do_syscall_64+0xc1/0x1d0 [ 92.408176][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 92.408352][ T11] [ 92.408415][ T11] Second to last potentially related work creation: [ 92.408562][ T11] kasan_save_stack+0x24/0x50 [ 92.408685][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 92.408810][ T11] insert_work+0x34/0x230 [ 92.408904][ T11] __queue_work+0x5fd/0xa40 [ 92.409026][ T11] queue_delayed_work_on+0x8c/0xa0 [ 92.409149][ T11] __inet_insert_ifa+0x751/0xb10 [ 92.409274][ T11] inetdev_event+0xb18/0xcf0 [ 92.409398][ T11] notifier_call_chain+0xcd/0x150 [ 92.409531][ T11] __dev_notify_flags+0xe6/0x250 [ 92.409649][ T11] dev_change_flags+0xec/0x160 [ 92.409768][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 92.409888][ T11] rtnl_newlink+0x6de/0xa80 [ 92.410007][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 92.410125][ T11] netlink_rcv_skb+0x130/0x360 [ 92.410262][ T11] netlink_unicast+0x44b/0x710 [ 92.410385][ T11] netlink_sendmsg+0x723/0xbe0 [ 92.410506][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 92.410630][ T11] ___sys_sendmsg+0xee/0x170 [ 92.410756][ T11] __sys_sendmsg+0x109/0x1a0 [ 92.410889][ T11] do_syscall_64+0xc1/0x1d0 [ 92.411011][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 92.411171][ T11] [ 92.411235][ T11] The buggy address belongs to the object at ffff888004ee0040 [ 92.411235][ T11] which belongs to the cache net_namespace of size 6528 [ 92.411558][ T11] The buggy address is located 184 bytes inside of [ 92.411558][ T11] freed 6528-byte region [ffff888004ee0040, ffff888004ee19c0) [ 92.411853][ T11] [ 92.411916][ T11] The buggy address belongs to the physical page: [ 92.412067][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4ee0 [ 92.412283][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 92.412471][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 92.412628][ T11] page_type: f5(slab) [ 92.412730][ T11] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffffea0000342e10 [ 92.412950][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 92.413167][ T11] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffffea0000342e10 [ 92.413384][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 92.413598][ T11] head: 0080000000000003 ffffea000013b801 ffffffffffffffff 0000000000000000 [ 92.413815][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 92.414028][ T11] page dumped because: kasan: bad access detected [ 92.414187][ T11] [ 92.414251][ T11] Memory state around the buggy address: [ 92.414369][ T11] ffff888004edff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 92.414546][ T11] ffff888004ee0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 92.414727][ T11] >ffff888004ee0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.414906][ T11] ^ [ 92.415081][ T11] ffff888004ee0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.415257][ T11] ffff888004ee0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 92.415431][ T11] ================================================================== [ 92.415657][ T11] Disabling lock debugging due to kernel taint [ 94.624799][ T693] u32 classifier [ 94.624931][ T693] input device check on [ 94.625054][ T693] Actions configured [ 94.679333][ T694] Mirror/redirect action on