[ 17.929204][ T69] ================================================================== [ 17.929429][ T69] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 17.929648][ T69] Read of size 8 at addr ffff88800b1b80f8 by task kworker/u16:1/69 [ 17.929826][ T69] [ 17.929886][ T69] CPU: 1 UID: 0 PID: 69 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 17.930083][ T69] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 17.930239][ T69] Workqueue: netns cleanup_net [ 17.930371][ T69] Call Trace: [ 17.930465][ T69] [ 17.930537][ T69] dump_stack_lvl+0x82/0xd0 [ 17.930666][ T69] print_address_description.constprop.0+0x2c/0x3b0 [ 17.930824][ T69] ? cleanup_net+0x932/0xa40 [ 17.930960][ T69] print_report+0xb4/0x270 [ 17.931088][ T69] ? kasan_addr_to_slab+0x25/0x80 [ 17.931216][ T69] kasan_report+0xbd/0xf0 [ 17.931312][ T69] ? cleanup_net+0x932/0xa40 [ 17.931438][ T69] cleanup_net+0x932/0xa40 [ 17.931565][ T69] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 17.931694][ T69] ? __pfx_cleanup_net+0x10/0x10 [ 17.931817][ T69] ? trace_lock_acquire+0x148/0x1f0 [ 17.931944][ T69] ? lock_acquire+0x32/0xc0 [ 17.932068][ T69] ? process_one_work+0xe0b/0x16d0 [ 17.932197][ T69] process_one_work+0xe55/0x16d0 [ 17.932322][ T69] ? __pfx___lock_release+0x10/0x10 [ 17.932447][ T69] ? __pfx_process_one_work+0x10/0x10 [ 17.932575][ T69] ? assign_work+0x16c/0x240 [ 17.932703][ T69] worker_thread+0x58c/0xce0 [ 17.932827][ T69] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 17.932984][ T69] ? __pfx_worker_thread+0x10/0x10 [ 17.933112][ T69] ? __pfx_worker_thread+0x10/0x10 [ 17.933238][ T69] kthread+0x28a/0x350 [ 17.933334][ T69] ? __pfx_kthread+0x10/0x10 [ 17.933459][ T69] ret_from_fork+0x31/0x70 [ 17.933584][ T69] ? __pfx_kthread+0x10/0x10 [ 17.933709][ T69] ret_from_fork_asm+0x1a/0x30 [ 17.933838][ T69] [ 17.933939][ T69] [ 17.934002][ T69] Allocated by task 225: [ 17.934097][ T69] kasan_save_stack+0x24/0x50 [ 17.934225][ T69] kasan_save_track+0x14/0x30 [ 17.934349][ T69] __kasan_slab_alloc+0x59/0x70 [ 17.934475][ T69] kmem_cache_alloc_noprof+0x10b/0x350 [ 17.934599][ T69] copy_net_ns+0xc6/0x340 [ 17.934696][ T69] create_new_namespaces+0x35f/0x920 [ 17.934826][ T69] unshare_nsproxy_namespaces+0x8d/0x130 [ 17.934954][ T69] ksys_unshare+0x2a9/0x660 [ 17.935080][ T69] __x64_sys_unshare+0x31/0x40 [ 17.935202][ T69] do_syscall_64+0xc1/0x1d0 [ 17.935328][ T69] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 17.935485][ T69] [ 17.935548][ T69] Freed by task 69: [ 17.935641][ T69] kasan_save_stack+0x24/0x50 [ 17.935768][ T69] kasan_save_track+0x14/0x30 [ 17.935894][ T69] kasan_save_free_info+0x3b/0x60 [ 17.936017][ T69] __kasan_slab_free+0x38/0x50 [ 17.936141][ T69] kmem_cache_free+0xf8/0x330 [ 17.936265][ T69] cleanup_net+0x5a8/0xa40 [ 17.936388][ T69] process_one_work+0xe55/0x16d0 [ 17.936510][ T69] worker_thread+0x58c/0xce0 [ 17.936632][ T69] kthread+0x28a/0x350 [ 17.936730][ T69] ret_from_fork+0x31/0x70 [ 17.936854][ T69] ret_from_fork_asm+0x1a/0x30 [ 17.936980][ T69] [ 17.937043][ T69] Last potentially related work creation: [ 17.937170][ T69] kasan_save_stack+0x24/0x50 [ 17.937299][ T69] __kasan_record_aux_stack+0x8e/0xa0 [ 17.937425][ T69] insert_work+0x34/0x230 [ 17.937520][ T69] __queue_work+0x5fd/0xa40 [ 17.937647][ T69] queue_delayed_work_on+0x8c/0xa0 [ 17.937771][ T69] __inet_insert_ifa+0x751/0xb10 [ 17.937898][ T69] inet_rtm_newaddr+0x833/0xbd0 [ 17.938050][ T69] rtnetlink_rcv_msg+0x712/0xc10 [ 17.938178][ T69] netlink_rcv_skb+0x130/0x360 [ 17.938304][ T69] netlink_unicast+0x44b/0x710 [ 17.938427][ T69] netlink_sendmsg+0x723/0xbe0 [ 17.938555][ T69] ____sys_sendmsg+0x7ac/0xa10 [ 17.938683][ T69] ___sys_sendmsg+0xee/0x170 [ 17.938820][ T69] __sys_sendmsg+0x109/0x1a0 [ 17.938955][ T69] do_syscall_64+0xc1/0x1d0 [ 17.939081][ T69] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 17.939243][ T69] [ 17.939313][ T69] The buggy address belongs to the object at ffff88800b1b8040 [ 17.939313][ T69] which belongs to the cache net_namespace of size 5696 [ 17.939694][ T69] The buggy address is located 184 bytes inside of [ 17.939694][ T69] freed 5696-byte region [ffff88800b1b8040, ffff88800b1b9680) [ 17.939995][ T69] [ 17.940061][ T69] The buggy address belongs to the physical page: [ 17.940217][ T69] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b1bafc0 pfn:0xb1b8 [ 17.940470][ T69] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 17.940691][ T69] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 17.940872][ T69] page_type: f5(slab) [ 17.940978][ T69] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 17.941207][ T69] raw: ffff88800b1bafc0 0000000000050002 00000001f5000000 0000000000000000 [ 17.941428][ T69] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 17.941655][ T69] head: ffff88800b1bafc0 0000000000050002 00000001f5000000 0000000000000000 [ 17.941903][ T69] head: 0080000000000003 ffffea00002c6e01 ffffffffffffffff 0000000000000000 [ 17.942122][ T69] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 17.942350][ T69] page dumped because: kasan: bad access detected [ 17.942502][ T69] [ 17.942565][ T69] Memory state around the buggy address: [ 17.942690][ T69] ffff88800b1b7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.942881][ T69] ffff88800b1b8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 17.943057][ T69] >ffff88800b1b8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 17.943235][ T69] ^ [ 17.943413][ T69] ffff88800b1b8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 17.943593][ T69] ffff88800b1b8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 17.943770][ T69] ================================================================== [ 17.944090][ T69] Disabling lock debugging due to kernel taint