[ 12.052373][ T264] ip (264) used greatest stack depth: 24104 bytes left [ 15.616120][ T304] netem: version 1.3 [ 127.971285][ T11] ================================================================== [ 127.971571][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 127.971758][ T11] Read of size 8 at addr ffff88800a1980f8 by task kworker/u16:0/11 [ 127.971943][ T11] [ 127.972008][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 127.972193][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 127.972347][ T11] Workqueue: netns cleanup_net [ 127.972476][ T11] Call Trace: [ 127.972568][ T11] [ 127.972634][ T11] dump_stack_lvl+0x82/0xd0 [ 127.972764][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 127.972920][ T11] ? cleanup_net+0x932/0xa40 [ 127.973046][ T11] print_report+0xb4/0x270 [ 127.973170][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 127.973295][ T11] kasan_report+0xbd/0xf0 [ 127.973393][ T11] ? cleanup_net+0x932/0xa40 [ 127.973519][ T11] cleanup_net+0x932/0xa40 [ 127.973642][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 127.973768][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 127.973892][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 127.974020][ T11] ? lock_acquire+0x32/0xc0 [ 127.974141][ T11] ? process_one_work+0xe0b/0x16d0 [ 127.974268][ T11] process_one_work+0xe55/0x16d0 [ 127.974393][ T11] ? __pfx___lock_release+0x10/0x10 [ 127.974518][ T11] ? __pfx_process_one_work+0x10/0x10 [ 127.974641][ T11] ? assign_work+0x16c/0x240 [ 127.974765][ T11] worker_thread+0x58c/0xce0 [ 127.974892][ T11] ? __pfx_worker_thread+0x10/0x10 [ 127.975014][ T11] kthread+0x28a/0x350 [ 127.975108][ T11] ? __pfx_kthread+0x10/0x10 [ 127.975236][ T11] ret_from_fork+0x31/0x70 [ 127.975361][ T11] ? __pfx_kthread+0x10/0x10 [ 127.975486][ T11] ret_from_fork_asm+0x1a/0x30 [ 127.975614][ T11] [ 127.975710][ T11] [ 127.975774][ T11] Allocated by task 247: [ 127.975870][ T11] kasan_save_stack+0x24/0x50 [ 127.975998][ T11] kasan_save_track+0x14/0x30 [ 127.976121][ T11] __kasan_slab_alloc+0x59/0x70 [ 127.976246][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 127.976369][ T11] copy_net_ns+0xc6/0x340 [ 127.976461][ T11] create_new_namespaces+0x35f/0x920 [ 127.976583][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 127.976706][ T11] ksys_unshare+0x2a9/0x660 [ 127.976833][ T11] __x64_sys_unshare+0x31/0x40 [ 127.976954][ T11] do_syscall_64+0xc1/0x1d0 [ 127.977081][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 127.977237][ T11] [ 127.977300][ T11] Freed by task 11: [ 127.977392][ T11] kasan_save_stack+0x24/0x50 [ 127.977515][ T11] kasan_save_track+0x14/0x30 [ 127.977638][ T11] kasan_save_free_info+0x3b/0x60 [ 127.977763][ T11] __kasan_slab_free+0x38/0x50 [ 127.977884][ T11] kmem_cache_free+0xf8/0x330 [ 127.978007][ T11] cleanup_net+0x5a8/0xa40 [ 127.978142][ T11] process_one_work+0xe55/0x16d0 [ 127.978266][ T11] worker_thread+0x58c/0xce0 [ 127.978388][ T11] kthread+0x28a/0x350 [ 127.978482][ T11] ret_from_fork+0x31/0x70 [ 127.978602][ T11] ret_from_fork_asm+0x1a/0x30 [ 127.978727][ T11] [ 127.978792][ T11] Last potentially related work creation: [ 127.978916][ T11] kasan_save_stack+0x24/0x50 [ 127.979042][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 127.979163][ T11] insert_work+0x34/0x230 [ 127.979257][ T11] __queue_work+0x5fd/0xa40 [ 127.979378][ T11] queue_delayed_work_on+0x8c/0xa0 [ 127.979505][ T11] __inet_insert_ifa+0x751/0xb10 [ 127.979630][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 127.979752][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 127.979874][ T11] netlink_rcv_skb+0x130/0x360 [ 127.979999][ T11] netlink_unicast+0x44b/0x710 [ 127.980123][ T11] netlink_sendmsg+0x723/0xbe0 [ 127.980247][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 127.980370][ T11] ___sys_sendmsg+0xee/0x170 [ 127.980497][ T11] __sys_sendmsg+0x109/0x1a0 [ 127.980618][ T11] do_syscall_64+0xc1/0x1d0 [ 127.980745][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 127.980899][ T11] [ 127.980962][ T11] Second to last potentially related work creation: [ 127.981112][ T11] kasan_save_stack+0x24/0x50 [ 127.981239][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 127.981365][ T11] insert_work+0x34/0x230 [ 127.981464][ T11] __queue_work+0x5fd/0xa40 [ 127.981587][ T11] queue_delayed_work_on+0x8c/0xa0 [ 127.981711][ T11] __inet_insert_ifa+0x751/0xb10 [ 127.981835][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 127.981956][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 127.982079][ T11] netlink_rcv_skb+0x130/0x360 [ 127.982204][ T11] netlink_unicast+0x44b/0x710 [ 127.982327][ T11] netlink_sendmsg+0x723/0xbe0 [ 127.982450][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 127.982572][ T11] ___sys_sendmsg+0xee/0x170 [ 127.982696][ T11] __sys_sendmsg+0x109/0x1a0 [ 127.982818][ T11] do_syscall_64+0xc1/0x1d0 [ 127.982943][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 127.983100][ T11] [ 127.983163][ T11] The buggy address belongs to the object at ffff88800a198040 [ 127.983163][ T11] which belongs to the cache net_namespace of size 6080 [ 127.983484][ T11] The buggy address is located 184 bytes inside of [ 127.983484][ T11] freed 6080-byte region [ffff88800a198040, ffff88800a199800) [ 127.983773][ T11] [ 127.983837][ T11] The buggy address belongs to the physical page: [ 127.983986][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a19cc00 pfn:0xa198 [ 127.984229][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 127.984412][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 127.984569][ T11] page_type: f5(slab) [ 127.984670][ T11] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 127.984888][ T11] raw: ffff88800a19cc00 0000000000050003 00000001f5000000 0000000000000000 [ 127.985102][ T11] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 127.985317][ T11] head: ffff88800a19cc00 0000000000050003 00000001f5000000 0000000000000000 [ 127.985536][ T11] head: 0080000000000003 ffffea0000286601 ffffffffffffffff 0000000000000000 [ 127.985815][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 127.986095][ T11] page dumped because: kasan: bad access detected [ 127.986247][ T11] [ 127.986308][ T11] Memory state around the buggy address: [ 127.986425][ T11] ffff88800a197f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 127.986603][ T11] ffff88800a198000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 127.986779][ T11] >ffff88800a198080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 127.987014][ T11] ^ [ 127.987187][ T11] ffff88800a198100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 127.987365][ T11] ffff88800a198180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 127.987537][ T11] ================================================================== [ 127.987729][ T11] Disabling lock debugging due to kernel taint