[ 11.122619][ T278] veth0: renamed from veth-rt-1 [ 11.998808][ T287] veth0: renamed from veth-rt-2 [ 18.317445][ T11] ================================================================== [ 18.317691][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 18.317922][ T11] Read of size 8 at addr ffff888009bb00f8 by task kworker/u16:0/11 [ 18.318127][ T11] [ 18.318201][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 18.318409][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.318590][ T11] Workqueue: netns cleanup_net [ 18.318737][ T11] Call Trace: [ 18.318860][ T11] [ 18.318936][ T11] dump_stack_lvl+0x82/0xd0 [ 18.319080][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 18.319256][ T11] ? cleanup_net+0xa5d/0xb90 [ 18.319405][ T11] print_report+0xb4/0x270 [ 18.319550][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 18.319692][ T11] kasan_report+0xbd/0xf0 [ 18.319800][ T11] ? cleanup_net+0xa5d/0xb90 [ 18.319939][ T11] cleanup_net+0xa5d/0xb90 [ 18.320081][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 18.320233][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 18.320373][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 18.320521][ T11] ? lock_acquire+0x32/0xc0 [ 18.320664][ T11] ? process_one_work+0xe0b/0x16d0 [ 18.320810][ T11] process_one_work+0xe55/0x16d0 [ 18.320954][ T11] ? __pfx___lock_release+0x10/0x10 [ 18.321096][ T11] ? __pfx_process_one_work+0x10/0x10 [ 18.321248][ T11] ? assign_work+0x16c/0x240 [ 18.321389][ T11] worker_thread+0x58c/0xce0 [ 18.321534][ T11] ? __pfx_worker_thread+0x10/0x10 [ 18.321675][ T11] kthread+0x28a/0x350 [ 18.321783][ T11] ? __pfx_kthread+0x10/0x10 [ 18.321927][ T11] ret_from_fork+0x31/0x70 [ 18.322067][ T11] ? __pfx_kthread+0x10/0x10 [ 18.322212][ T11] ret_from_fork_asm+0x1a/0x30 [ 18.322357][ T11] [ 18.322463][ T11] [ 18.322536][ T11] Allocated by task 264: [ 18.322641][ T11] kasan_save_stack+0x24/0x50 [ 18.322781][ T11] kasan_save_track+0x14/0x30 [ 18.322918][ T11] __kasan_slab_alloc+0x59/0x70 [ 18.323058][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 18.323200][ T11] copy_net_ns+0xc6/0x540 [ 18.323307][ T11] create_new_namespaces+0x35f/0x920 [ 18.323462][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 18.323604][ T11] ksys_unshare+0x2c4/0x6e0 [ 18.323746][ T11] __x64_sys_unshare+0x31/0x40 [ 18.323887][ T11] do_syscall_64+0xc1/0x1d0 [ 18.324034][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.324211][ T11] [ 18.324283][ T11] Freed by task 11: [ 18.324389][ T11] kasan_save_stack+0x24/0x50 [ 18.324533][ T11] kasan_save_track+0x14/0x30 [ 18.324671][ T11] kasan_save_free_info+0x3b/0x60 [ 18.324809][ T11] __kasan_slab_free+0x38/0x50 [ 18.324947][ T11] kmem_cache_free+0xf8/0x330 [ 18.325085][ T11] cleanup_net+0x5a8/0xb90 [ 18.325230][ T11] process_one_work+0xe55/0x16d0 [ 18.325366][ T11] worker_thread+0x58c/0xce0 [ 18.325502][ T11] kthread+0x28a/0x350 [ 18.325611][ T11] ret_from_fork+0x31/0x70 [ 18.325750][ T11] ret_from_fork_asm+0x1a/0x30 [ 18.325887][ T11] [ 18.325959][ T11] Last potentially related work creation: [ 18.326098][ T11] kasan_save_stack+0x24/0x50 [ 18.326238][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 18.326378][ T11] insert_work+0x34/0x230 [ 18.326483][ T11] __queue_work+0x5fd/0xa40 [ 18.326626][ T11] queue_delayed_work_on+0x8c/0xa0 [ 18.326765][ T11] __inet_insert_ifa+0x751/0xb10 [ 18.326907][ T11] inetdev_event+0xb18/0xcf0 [ 18.327045][ T11] notifier_call_chain+0xcd/0x150 [ 18.327185][ T11] __dev_notify_flags+0xe6/0x250 [ 18.327327][ T11] dev_change_flags+0xec/0x160 [ 18.327465][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 18.327605][ T11] rtnl_newlink+0x6de/0xa80 [ 18.327748][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 18.327886][ T11] netlink_rcv_skb+0x130/0x360 [ 18.328029][ T11] netlink_unicast+0x44b/0x710 [ 18.328172][ T11] netlink_sendmsg+0x723/0xbe0 [ 18.328311][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 18.328450][ T11] ___sys_sendmsg+0xee/0x170 [ 18.328592][ T11] __sys_sendmsg+0x109/0x1a0 [ 18.328731][ T11] do_syscall_64+0xc1/0x1d0 [ 18.328872][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.329046][ T11] [ 18.329119][ T11] The buggy address belongs to the object at ffff888009bb0040 [ 18.329119][ T11] which belongs to the cache net_namespace of size 6528 [ 18.329478][ T11] The buggy address is located 184 bytes inside of [ 18.329478][ T11] freed 6528-byte region [ffff888009bb0040, ffff888009bb19c0) [ 18.329812][ T11] [ 18.329884][ T11] The buggy address belongs to the physical page: [ 18.330052][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9bb0 [ 18.330292][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 18.330499][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 18.330677][ T11] page_type: f5(slab) [ 18.330804][ T11] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 18.331047][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 18.331290][ T11] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 18.331534][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 18.331780][ T11] head: 0080000000000003 ffffea000026ec01 ffffffffffffffff 0000000000000000 [ 18.332022][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 18.332261][ T11] page dumped because: kasan: bad access detected [ 18.332433][ T11] [ 18.332503][ T11] Memory state around the buggy address: [ 18.332638][ T11] ffff888009baff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 18.332846][ T11] ffff888009bb0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 18.333044][ T11] >ffff888009bb0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.333242][ T11] ^ [ 18.333439][ T11] ffff888009bb0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.333640][ T11] ffff888009bb0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.333836][ T11] ================================================================== [ 18.334137][ T11] Disabling lock debugging due to kernel taint