[ 106.287275][ T11] ================================================================== [ 106.287530][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 106.287734][ T11] Read of size 8 at addr ffff88800b6500f8 by task kworker/u16:0/11 [ 106.287918][ T11] [ 106.287983][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 106.288171][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 106.288333][ T11] Workqueue: netns cleanup_net [ 106.288468][ T11] Call Trace: [ 106.288564][ T11] [ 106.288632][ T11] dump_stack_lvl+0x82/0xd0 [ 106.288760][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 106.288916][ T11] ? cleanup_net+0x932/0xa40 [ 106.289040][ T11] print_report+0xb4/0x270 [ 106.289165][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 106.289286][ T11] kasan_report+0xbd/0xf0 [ 106.289383][ T11] ? cleanup_net+0x932/0xa40 [ 106.289508][ T11] cleanup_net+0x932/0xa40 [ 106.289629][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 106.289757][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 106.289880][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 106.290003][ T11] ? lock_acquire+0x32/0xc0 [ 106.290123][ T11] ? process_one_work+0xe0b/0x16d0 [ 106.290251][ T11] process_one_work+0xe55/0x16d0 [ 106.290379][ T11] ? __pfx___lock_release+0x10/0x10 [ 106.290502][ T11] ? __pfx_process_one_work+0x10/0x10 [ 106.290629][ T11] ? assign_work+0x16c/0x240 [ 106.290759][ T11] worker_thread+0x58c/0xce0 [ 106.290887][ T11] ? __pfx_worker_thread+0x10/0x10 [ 106.291013][ T11] kthread+0x28a/0x350 [ 106.291108][ T11] ? __pfx_kthread+0x10/0x10 [ 106.291230][ T11] ret_from_fork+0x31/0x70 [ 106.291353][ T11] ? __pfx_kthread+0x10/0x10 [ 106.291476][ T11] ret_from_fork_asm+0x1a/0x30 [ 106.291604][ T11] [ 106.291697][ T11] [ 106.291761][ T11] Allocated by task 251: [ 106.291858][ T11] kasan_save_stack+0x24/0x50 [ 106.291984][ T11] kasan_save_track+0x14/0x30 [ 106.292105][ T11] __kasan_slab_alloc+0x59/0x70 [ 106.292235][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 106.292360][ T11] copy_net_ns+0xc6/0x340 [ 106.292455][ T11] create_new_namespaces+0x35f/0x920 [ 106.292577][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 106.292700][ T11] ksys_unshare+0x2a9/0x660 [ 106.292826][ T11] __x64_sys_unshare+0x31/0x40 [ 106.292950][ T11] do_syscall_64+0xc1/0x1d0 [ 106.293074][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 106.293234][ T11] [ 106.293297][ T11] Freed by task 11: [ 106.293392][ T11] kasan_save_stack+0x24/0x50 [ 106.293515][ T11] kasan_save_track+0x14/0x30 [ 106.293639][ T11] kasan_save_free_info+0x3b/0x60 [ 106.293765][ T11] __kasan_slab_free+0x38/0x50 [ 106.293888][ T11] kmem_cache_free+0xf8/0x330 [ 106.294015][ T11] cleanup_net+0x5a8/0xa40 [ 106.294141][ T11] process_one_work+0xe55/0x16d0 [ 106.294275][ T11] worker_thread+0x58c/0xce0 [ 106.294398][ T11] kthread+0x28a/0x350 [ 106.294491][ T11] ret_from_fork+0x31/0x70 [ 106.294612][ T11] ret_from_fork_asm+0x1a/0x30 [ 106.294738][ T11] [ 106.294801][ T11] Last potentially related work creation: [ 106.294926][ T11] kasan_save_stack+0x24/0x50 [ 106.295053][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 106.295178][ T11] insert_work+0x34/0x230 [ 106.295272][ T11] __queue_work+0x5fd/0xa40 [ 106.295398][ T11] queue_delayed_work_on+0x8c/0xa0 [ 106.295520][ T11] __inet_insert_ifa+0x751/0xb10 [ 106.295645][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 106.295769][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 106.295899][ T11] netlink_rcv_skb+0x130/0x360 [ 106.296029][ T11] netlink_unicast+0x44b/0x710 [ 106.296153][ T11] netlink_sendmsg+0x723/0xbe0 [ 106.296274][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 106.296400][ T11] ___sys_sendmsg+0xee/0x170 [ 106.296524][ T11] __sys_sendmsg+0x109/0x1a0 [ 106.296646][ T11] do_syscall_64+0xc1/0x1d0 [ 106.296775][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 106.296931][ T11] [ 106.296996][ T11] Second to last potentially related work creation: [ 106.297149][ T11] kasan_save_stack+0x24/0x50 [ 106.297273][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 106.297403][ T11] insert_work+0x34/0x230 [ 106.297495][ T11] __queue_work+0x5fd/0xa40 [ 106.297618][ T11] queue_delayed_work_on+0x8c/0xa0 [ 106.297744][ T11] __inet_insert_ifa+0x751/0xb10 [ 106.297871][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 106.297994][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 106.298118][ T11] netlink_rcv_skb+0x130/0x360 [ 106.298240][ T11] netlink_unicast+0x44b/0x710 [ 106.298366][ T11] netlink_sendmsg+0x723/0xbe0 [ 106.298490][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 106.298615][ T11] ___sys_sendmsg+0xee/0x170 [ 106.298742][ T11] __sys_sendmsg+0x109/0x1a0 [ 106.298880][ T11] do_syscall_64+0xc1/0x1d0 [ 106.299002][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 106.299156][ T11] [ 106.299218][ T11] The buggy address belongs to the object at ffff88800b650040 [ 106.299218][ T11] which belongs to the cache net_namespace of size 6592 [ 106.299539][ T11] The buggy address is located 184 bytes inside of [ 106.299539][ T11] freed 6592-byte region [ffff88800b650040, ffff88800b651a00) [ 106.299837][ T11] [ 106.299900][ T11] The buggy address belongs to the physical page: [ 106.300049][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b655200 pfn:0xb650 [ 106.300293][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 106.300477][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 106.300633][ T11] page_type: f5(slab) [ 106.300733][ T11] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 106.300953][ T11] raw: ffff88800b655200 0000000000040003 00000001f5000000 0000000000000000 [ 106.301167][ T11] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 106.301384][ T11] head: ffff88800b655200 0000000000040003 00000001f5000000 0000000000000000 [ 106.301602][ T11] head: 0080000000000003 ffffea00002d9401 ffffffffffffffff 0000000000000000 [ 106.301821][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 106.302040][ T11] page dumped because: kasan: bad access detected [ 106.302193][ T11] [ 106.302254][ T11] Memory state around the buggy address: [ 106.302378][ T11] ffff88800b64ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 106.302556][ T11] ffff88800b650000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 106.302734][ T11] >ffff88800b650080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 106.302913][ T11] ^ [ 106.303087][ T11] ffff88800b650100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 106.303265][ T11] ffff88800b650180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 106.303439][ T11] ================================================================== [ 106.303634][ T11] Disabling lock debugging due to kernel taint