[ 12.512715][ T268] ip (268) used greatest stack depth: 23416 bytes left [ 123.295618][ T11] ================================================================== [ 123.295886][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 123.296097][ T11] Read of size 8 at addr ffff8880090f80f8 by task kworker/u16:0/11 [ 123.296301][ T11] [ 123.296373][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 123.296579][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 123.296760][ T11] Workqueue: netns cleanup_net [ 123.296910][ T11] Call Trace: [ 123.297016][ T11] [ 123.297093][ T11] dump_stack_lvl+0x82/0xd0 [ 123.297237][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 123.297415][ T11] ? cleanup_net+0x932/0xa40 [ 123.297563][ T11] print_report+0xb4/0x270 [ 123.297706][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 123.297849][ T11] kasan_report+0xbd/0xf0 [ 123.297961][ T11] ? cleanup_net+0x932/0xa40 [ 123.298111][ T11] cleanup_net+0x932/0xa40 [ 123.298254][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 123.298400][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 123.298542][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 123.298691][ T11] ? lock_acquire+0x32/0xc0 [ 123.298837][ T11] ? process_one_work+0xe0b/0x16d0 [ 123.298985][ T11] process_one_work+0xe55/0x16d0 [ 123.299134][ T11] ? __pfx___lock_release+0x10/0x10 [ 123.299281][ T11] ? __pfx_process_one_work+0x10/0x10 [ 123.299430][ T11] ? assign_work+0x16c/0x240 [ 123.299580][ T11] worker_thread+0x58c/0xce0 [ 123.299733][ T11] ? __pfx_worker_thread+0x10/0x10 [ 123.299882][ T11] kthread+0x28a/0x350 [ 123.299993][ T11] ? __pfx_kthread+0x10/0x10 [ 123.300143][ T11] ret_from_fork+0x31/0x70 [ 123.300290][ T11] ? __pfx_kthread+0x10/0x10 [ 123.300433][ T11] ret_from_fork_asm+0x1a/0x30 [ 123.300578][ T11] [ 123.300690][ T11] [ 123.300762][ T11] Allocated by task 263: [ 123.300868][ T11] kasan_save_stack+0x24/0x50 [ 123.301016][ T11] kasan_save_track+0x14/0x30 [ 123.301165][ T11] __kasan_slab_alloc+0x59/0x70 [ 123.301301][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 123.301450][ T11] copy_net_ns+0xc6/0x340 [ 123.301559][ T11] create_new_namespaces+0x35f/0x920 [ 123.301705][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 123.301845][ T11] ksys_unshare+0x2a9/0x660 [ 123.301991][ T11] __x64_sys_unshare+0x31/0x40 [ 123.302135][ T11] do_syscall_64+0xc1/0x1d0 [ 123.302275][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 123.302454][ T11] [ 123.302530][ T11] Freed by task 11: [ 123.302644][ T11] kasan_save_stack+0x24/0x50 [ 123.302784][ T11] kasan_save_track+0x14/0x30 [ 123.302924][ T11] kasan_save_free_info+0x3b/0x60 [ 123.303067][ T11] __kasan_slab_free+0x38/0x50 [ 123.303205][ T11] kmem_cache_free+0xf8/0x330 [ 123.303352][ T11] cleanup_net+0x5a8/0xa40 [ 123.303496][ T11] process_one_work+0xe55/0x16d0 [ 123.303644][ T11] worker_thread+0x58c/0xce0 [ 123.303790][ T11] kthread+0x28a/0x350 [ 123.303898][ T11] ret_from_fork+0x31/0x70 [ 123.304035][ T11] ret_from_fork_asm+0x1a/0x30 [ 123.304172][ T11] [ 123.304243][ T11] Last potentially related work creation: [ 123.304391][ T11] kasan_save_stack+0x24/0x50 [ 123.304532][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 123.304673][ T11] insert_work+0x34/0x230 [ 123.304783][ T11] __queue_work+0x5fd/0xa40 [ 123.304924][ T11] queue_delayed_work_on+0x8c/0xa0 [ 123.305062][ T11] __inet_insert_ifa+0x751/0xb10 [ 123.305214][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 123.305365][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 123.305508][ T11] netlink_rcv_skb+0x130/0x360 [ 123.305666][ T11] netlink_unicast+0x44b/0x710 [ 123.305806][ T11] netlink_sendmsg+0x723/0xbe0 [ 123.305955][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 123.306111][ T11] ___sys_sendmsg+0xee/0x170 [ 123.306258][ T11] __sys_sendmsg+0x109/0x1a0 [ 123.306395][ T11] do_syscall_64+0xc1/0x1d0 [ 123.306552][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 123.306736][ T11] [ 123.306818][ T11] Second to last potentially related work creation: [ 123.306989][ T11] kasan_save_stack+0x24/0x50 [ 123.307136][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 123.307278][ T11] insert_work+0x34/0x230 [ 123.307399][ T11] __queue_work+0x5fd/0xa40 [ 123.307544][ T11] queue_delayed_work_on+0x8c/0xa0 [ 123.307695][ T11] __inet_insert_ifa+0x751/0xb10 [ 123.307839][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 123.307996][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 123.308148][ T11] netlink_rcv_skb+0x130/0x360 [ 123.308301][ T11] netlink_unicast+0x44b/0x710 [ 123.308456][ T11] netlink_sendmsg+0x723/0xbe0 [ 123.308598][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 123.308749][ T11] ___sys_sendmsg+0xee/0x170 [ 123.308888][ T11] __sys_sendmsg+0x109/0x1a0 [ 123.309045][ T11] do_syscall_64+0xc1/0x1d0 [ 123.309193][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 123.309389][ T11] [ 123.309468][ T11] The buggy address belongs to the object at ffff8880090f8040 [ 123.309468][ T11] which belongs to the cache net_namespace of size 6592 [ 123.309836][ T11] The buggy address is located 184 bytes inside of [ 123.309836][ T11] freed 6592-byte region [ffff8880090f8040, ffff8880090f9a00) [ 123.310163][ T11] [ 123.310241][ T11] The buggy address belongs to the physical page: [ 123.310414][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x90f8 [ 123.310659][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 123.310869][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 123.311045][ T11] page_type: f5(slab) [ 123.311154][ T11] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffffea00002da010 [ 123.311411][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 123.311657][ T11] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffffea00002da010 [ 123.311899][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 123.312143][ T11] head: 0080000000000003 ffffea0000243e01 ffffffffffffffff 0000000000000000 [ 123.312392][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 123.312641][ T11] page dumped because: kasan: bad access detected [ 123.312809][ T11] [ 123.312879][ T11] Memory state around the buggy address: [ 123.313041][ T11] ffff8880090f7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 123.313247][ T11] ffff8880090f8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 123.313443][ T11] >ffff8880090f8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 123.313642][ T11] ^ [ 123.313844][ T11] ffff8880090f8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 123.314042][ T11] ffff8880090f8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 123.314247][ T11] ================================================================== [ 123.314474][ T11] Disabling lock debugging due to kernel taint