[ 12.757521][ T266] ip (266) used greatest stack depth: 23936 bytes left [ 13.086983][ T271] ipip: IPv4 and MPLS over IPv4 tunneling driver [ 25.092243][ T67] ================================================================== [ 25.092450][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 25.092632][ T67] Read of size 8 at addr ffff8880089980f8 by task kworker/u16:1/67 [ 25.092829][ T67] [ 25.092893][ T67] CPU: 1 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 25.093083][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 25.093245][ T67] Workqueue: netns cleanup_net [ 25.093376][ T67] Call Trace: [ 25.093470][ T67] [ 25.093540][ T67] dump_stack_lvl+0x82/0xd0 [ 25.093667][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 25.093823][ T67] ? cleanup_net+0x932/0xa40 [ 25.093946][ T67] print_report+0xb4/0x270 [ 25.094067][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 25.094191][ T67] kasan_report+0xbd/0xf0 [ 25.094286][ T67] ? cleanup_net+0x932/0xa40 [ 25.094412][ T67] cleanup_net+0x932/0xa40 [ 25.094533][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 25.094658][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 25.094778][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 25.094899][ T67] ? lock_acquire+0x32/0xc0 [ 25.095020][ T67] ? process_one_work+0xe0b/0x16d0 [ 25.095145][ T67] process_one_work+0xe55/0x16d0 [ 25.095269][ T67] ? __pfx___lock_release+0x10/0x10 [ 25.095394][ T67] ? __pfx_process_one_work+0x10/0x10 [ 25.095516][ T67] ? assign_work+0x16c/0x240 [ 25.095639][ T67] worker_thread+0x58c/0xce0 [ 25.095761][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 25.095928][ T67] ? __pfx_worker_thread+0x10/0x10 [ 25.096051][ T67] ? __pfx_worker_thread+0x10/0x10 [ 25.096170][ T67] kthread+0x28a/0x350 [ 25.096263][ T67] ? __pfx_kthread+0x10/0x10 [ 25.096383][ T67] ret_from_fork+0x31/0x70 [ 25.096503][ T67] ? __pfx_kthread+0x10/0x10 [ 25.096629][ T67] ret_from_fork_asm+0x1a/0x30 [ 25.096753][ T67] [ 25.096844][ T67] [ 25.096911][ T67] Allocated by task 252: [ 25.097004][ T67] kasan_save_stack+0x24/0x50 [ 25.097126][ T67] kasan_save_track+0x14/0x30 [ 25.097246][ T67] __kasan_slab_alloc+0x59/0x70 [ 25.097364][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 25.097489][ T67] copy_net_ns+0xc6/0x340 [ 25.097582][ T67] create_new_namespaces+0x35f/0x920 [ 25.097703][ T67] unshare_nsproxy_namespaces+0x8d/0x130 [ 25.097823][ T67] ksys_unshare+0x2a9/0x660 [ 25.097945][ T67] __x64_sys_unshare+0x31/0x40 [ 25.098067][ T67] do_syscall_64+0xc1/0x1d0 [ 25.098190][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 25.098341][ T67] [ 25.098409][ T67] Freed by task 67: [ 25.098502][ T67] kasan_save_stack+0x24/0x50 [ 25.098624][ T67] kasan_save_track+0x14/0x30 [ 25.098742][ T67] kasan_save_free_info+0x3b/0x60 [ 25.098863][ T67] __kasan_slab_free+0x38/0x50 [ 25.098983][ T67] kmem_cache_free+0xf8/0x330 [ 25.099102][ T67] cleanup_net+0x5a8/0xa40 [ 25.099221][ T67] process_one_work+0xe55/0x16d0 [ 25.099345][ T67] worker_thread+0x58c/0xce0 [ 25.099466][ T67] kthread+0x28a/0x350 [ 25.099557][ T67] ret_from_fork+0x31/0x70 [ 25.099675][ T67] ret_from_fork_asm+0x1a/0x30 [ 25.099795][ T67] [ 25.099858][ T67] Last potentially related work creation: [ 25.099978][ T67] kasan_save_stack+0x24/0x50 [ 25.100101][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 25.100226][ T67] insert_work+0x34/0x230 [ 25.100317][ T67] __queue_work+0x5fd/0xa40 [ 25.100441][ T67] queue_delayed_work_on+0x8c/0xa0 [ 25.100562][ T67] __inet_insert_ifa+0x751/0xb10 [ 25.100684][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 25.100804][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 25.100929][ T67] netlink_rcv_skb+0x130/0x360 [ 25.101054][ T67] netlink_unicast+0x44b/0x710 [ 25.101178][ T67] netlink_sendmsg+0x723/0xbe0 [ 25.101298][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 25.101421][ T67] ___sys_sendmsg+0xee/0x170 [ 25.101543][ T67] __sys_sendmsg+0x109/0x1a0 [ 25.101666][ T67] do_syscall_64+0xc1/0x1d0 [ 25.101787][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 25.101938][ T67] [ 25.101999][ T67] Second to last potentially related work creation: [ 25.102148][ T67] kasan_save_stack+0x24/0x50 [ 25.102271][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 25.102394][ T67] insert_work+0x34/0x230 [ 25.102486][ T67] __queue_work+0x5fd/0xa40 [ 25.102607][ T67] queue_delayed_work_on+0x8c/0xa0 [ 25.102728][ T67] __inet_insert_ifa+0x751/0xb10 [ 25.102851][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 25.102973][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 25.103099][ T67] netlink_rcv_skb+0x130/0x360 [ 25.103221][ T67] netlink_unicast+0x44b/0x710 [ 25.103344][ T67] netlink_sendmsg+0x723/0xbe0 [ 25.103467][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 25.103587][ T67] ___sys_sendmsg+0xee/0x170 [ 25.103708][ T67] __sys_sendmsg+0x109/0x1a0 [ 25.103830][ T67] do_syscall_64+0xc1/0x1d0 [ 25.103951][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 25.104106][ T67] [ 25.104167][ T67] The buggy address belongs to the object at ffff888008998040 [ 25.104167][ T67] which belongs to the cache net_namespace of size 6592 [ 25.104484][ T67] The buggy address is located 184 bytes inside of [ 25.104484][ T67] freed 6592-byte region [ffff888008998040, ffff888008999a00) [ 25.104774][ T67] [ 25.104840][ T67] The buggy address belongs to the physical page: [ 25.104986][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8998 [ 25.105197][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 25.105380][ T67] flags: 0x80000000000040(head|node=0|zone=1) [ 25.105539][ T67] page_type: f5(slab) [ 25.105634][ T67] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 25.105860][ T67] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 25.106084][ T67] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 25.106296][ T67] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 25.106507][ T67] head: 0080000000000003 ffffea0000226601 ffffffffffffffff 0000000000000000 [ 25.106722][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 25.106933][ T67] page dumped because: kasan: bad access detected [ 25.107082][ T67] [ 25.107143][ T67] Memory state around the buggy address: [ 25.107262][ T67] ffff888008997f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.107440][ T67] ffff888008998000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 25.107610][ T67] >ffff888008998080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.107784][ T67] ^ [ 25.107956][ T67] ffff888008998100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.108134][ T67] ffff888008998180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.108304][ T67] ================================================================== [ 25.108499][ T67] Disabling lock debugging due to kernel taint