[ 19.705924][ T946] veth0: renamed from veth-rt-1 [ 20.699542][ T956] veth0: renamed from veth-rt-2 [ 26.424992][ T11] ================================================================== [ 26.425274][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 26.425455][ T11] Read of size 8 at addr ffff88800cd100f8 by task kworker/u16:0/11 [ 26.425630][ T11] [ 26.425696][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 26.425876][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 26.426027][ T11] Workqueue: netns cleanup_net [ 26.426153][ T11] Call Trace: [ 26.426249][ T11] [ 26.426318][ T11] dump_stack_lvl+0x82/0xd0 [ 26.426443][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 26.426598][ T11] ? cleanup_net+0xa5d/0xb90 [ 26.426723][ T11] print_report+0xb4/0x270 [ 26.426843][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 26.426962][ T11] kasan_report+0xbd/0xf0 [ 26.427054][ T11] ? cleanup_net+0xa5d/0xb90 [ 26.427180][ T11] cleanup_net+0xa5d/0xb90 [ 26.427301][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 26.427423][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 26.427541][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 26.427689][ T11] ? lock_acquire+0x32/0xc0 [ 26.427818][ T11] ? process_one_work+0xe0b/0x16d0 [ 26.427943][ T11] process_one_work+0xe55/0x16d0 [ 26.428072][ T11] ? __pfx___lock_release+0x10/0x10 [ 26.428199][ T11] ? __pfx_process_one_work+0x10/0x10 [ 26.428326][ T11] ? assign_work+0x16c/0x240 [ 26.428451][ T11] worker_thread+0x58c/0xce0 [ 26.428578][ T11] ? __pfx_worker_thread+0x10/0x10 [ 26.428707][ T11] kthread+0x28a/0x350 [ 26.428801][ T11] ? __pfx_kthread+0x10/0x10 [ 26.428934][ T11] ret_from_fork+0x31/0x70 [ 26.429052][ T11] ? __pfx_kthread+0x10/0x10 [ 26.429171][ T11] ret_from_fork_asm+0x1a/0x30 [ 26.429296][ T11] [ 26.429389][ T11] [ 26.429450][ T11] Allocated by task 250: [ 26.429540][ T11] kasan_save_stack+0x24/0x50 [ 26.429663][ T11] kasan_save_track+0x14/0x30 [ 26.429785][ T11] __kasan_slab_alloc+0x59/0x70 [ 26.429901][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 26.430019][ T11] copy_net_ns+0xc6/0x540 [ 26.430109][ T11] create_new_namespaces+0x35f/0x920 [ 26.430230][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 26.430349][ T11] ksys_unshare+0x2c4/0x6e0 [ 26.430468][ T11] __x64_sys_unshare+0x31/0x40 [ 26.430588][ T11] do_syscall_64+0xc1/0x1d0 [ 26.430712][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.430863][ T11] [ 26.430941][ T11] Freed by task 11: [ 26.431032][ T11] kasan_save_stack+0x24/0x50 [ 26.431155][ T11] kasan_save_track+0x14/0x30 [ 26.431275][ T11] kasan_save_free_info+0x3b/0x60 [ 26.431399][ T11] __kasan_slab_free+0x38/0x50 [ 26.431522][ T11] kmem_cache_free+0xf8/0x330 [ 26.431647][ T11] cleanup_net+0x5a8/0xb90 [ 26.431766][ T11] process_one_work+0xe55/0x16d0 [ 26.431887][ T11] worker_thread+0x58c/0xce0 [ 26.432006][ T11] kthread+0x28a/0x350 [ 26.432100][ T11] ret_from_fork+0x31/0x70 [ 26.432229][ T11] ret_from_fork_asm+0x1a/0x30 [ 26.432352][ T11] [ 26.432415][ T11] Last potentially related work creation: [ 26.432537][ T11] kasan_save_stack+0x24/0x50 [ 26.432663][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 26.432786][ T11] insert_work+0x34/0x230 [ 26.432879][ T11] __queue_work+0x5fd/0xa40 [ 26.433001][ T11] queue_delayed_work_on+0x8c/0xa0 [ 26.433129][ T11] __inet_insert_ifa+0x751/0xb10 [ 26.433253][ T11] inetdev_event+0xb18/0xcf0 [ 26.433375][ T11] notifier_call_chain+0xcd/0x150 [ 26.433501][ T11] __dev_notify_flags+0xe6/0x250 [ 26.433629][ T11] dev_change_flags+0xec/0x160 [ 26.433751][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 26.433874][ T11] rtnl_newlink+0x6de/0xa80 [ 26.433999][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 26.434123][ T11] netlink_rcv_skb+0x130/0x360 [ 26.434245][ T11] netlink_unicast+0x44b/0x710 [ 26.434369][ T11] netlink_sendmsg+0x723/0xbe0 [ 26.434494][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 26.434620][ T11] ___sys_sendmsg+0xee/0x170 [ 26.434751][ T11] __sys_sendmsg+0x109/0x1a0 [ 26.434874][ T11] do_syscall_64+0xc1/0x1d0 [ 26.434997][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.435150][ T11] [ 26.435214][ T11] The buggy address belongs to the object at ffff88800cd10040 [ 26.435214][ T11] which belongs to the cache net_namespace of size 6528 [ 26.435535][ T11] The buggy address is located 184 bytes inside of [ 26.435535][ T11] freed 6528-byte region [ffff88800cd10040, ffff88800cd119c0) [ 26.435826][ T11] [ 26.435891][ T11] The buggy address belongs to the physical page: [ 26.436039][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcd10 [ 26.436258][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 26.436443][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 26.436600][ T11] page_type: f5(slab) [ 26.436697][ T11] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 26.436914][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 26.437136][ T11] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 26.437350][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 26.437564][ T11] head: 0080000000000003 ffffea0000334401 ffffffffffffffff 0000000000000000 [ 26.437794][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 26.438012][ T11] page dumped because: kasan: bad access detected [ 26.438167][ T11] [ 26.438229][ T11] Memory state around the buggy address: [ 26.438351][ T11] ffff88800cd0ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.438533][ T11] ffff88800cd10000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 26.438707][ T11] >ffff88800cd10080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.438898][ T11] ^ [ 26.439069][ T11] ffff88800cd10100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.439240][ T11] ffff88800cd10180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.439409][ T11] ================================================================== [ 26.439603][ T11] Disabling lock debugging due to kernel taint