[ 11.325104][ T283] ip (283) used greatest stack depth: 23168 bytes left [ 90.506549][ T66] veth-t100: Failed to cycle device veth-t100; route tables might be wrong! [ 90.511223][ T66] veth-t100: Failed to cycle device veth-t100; route tables might be wrong! [ 90.513919][ T66] veth-t100: Failed to cycle device veth-t100; route tables might be wrong! [ 91.283042][ T66] ================================================================== [ 91.283345][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 91.283551][ T66] Read of size 8 at addr ffff88800c5980f8 by task kworker/u16:1/66 [ 91.283772][ T66] [ 91.283843][ T66] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 91.284050][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 91.284222][ T66] Workqueue: netns cleanup_net [ 91.284363][ T66] Call Trace: [ 91.284467][ T66] [ 91.284540][ T66] dump_stack_lvl+0x82/0xd0 [ 91.284678][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 91.284851][ T66] ? cleanup_net+0xa5d/0xb90 [ 91.284987][ T66] print_report+0xb4/0x270 [ 91.285123][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 91.285259][ T66] kasan_report+0xbd/0xf0 [ 91.285363][ T66] ? cleanup_net+0xa5d/0xb90 [ 91.285500][ T66] cleanup_net+0xa5d/0xb90 [ 91.285636][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 91.285772][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 91.285908][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 91.286046][ T66] ? lock_acquire+0x32/0xc0 [ 91.286180][ T66] ? process_one_work+0xe0b/0x16d0 [ 91.286321][ T66] process_one_work+0xe55/0x16d0 [ 91.286467][ T66] ? __pfx___lock_release+0x10/0x10 [ 91.286605][ T66] ? __pfx_process_one_work+0x10/0x10 [ 91.286744][ T66] ? assign_work+0x16c/0x240 [ 91.286906][ T66] worker_thread+0x58c/0xce0 [ 91.287043][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 91.287213][ T66] ? __pfx_worker_thread+0x10/0x10 [ 91.287349][ T66] ? __pfx_worker_thread+0x10/0x10 [ 91.287489][ T66] kthread+0x28a/0x350 [ 91.287596][ T66] ? __pfx_kthread+0x10/0x10 [ 91.287735][ T66] ret_from_fork+0x31/0x70 [ 91.287874][ T66] ? __pfx_kthread+0x10/0x10 [ 91.288015][ T66] ret_from_fork_asm+0x1a/0x30 [ 91.288156][ T66] [ 91.288258][ T66] [ 91.288328][ T66] Allocated by task 260: [ 91.288434][ T66] kasan_save_stack+0x24/0x50 [ 91.288571][ T66] kasan_save_track+0x14/0x30 [ 91.288713][ T66] __kasan_slab_alloc+0x59/0x70 [ 91.288848][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 91.288986][ T66] copy_net_ns+0xc6/0x540 [ 91.289090][ T66] create_new_namespaces+0x35f/0x920 [ 91.289231][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 91.289367][ T66] ksys_unshare+0x2c4/0x6e0 [ 91.289504][ T66] __x64_sys_unshare+0x31/0x40 [ 91.289640][ T66] do_syscall_64+0xc1/0x1d0 [ 91.289779][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 91.289950][ T66] [ 91.290019][ T66] Freed by task 66: [ 91.290130][ T66] kasan_save_stack+0x24/0x50 [ 91.290267][ T66] kasan_save_track+0x14/0x30 [ 91.290410][ T66] kasan_save_free_info+0x3b/0x60 [ 91.290545][ T66] __kasan_slab_free+0x38/0x50 [ 91.290679][ T66] kmem_cache_free+0xf8/0x330 [ 91.290814][ T66] cleanup_net+0x5a8/0xb90 [ 91.290949][ T66] process_one_work+0xe55/0x16d0 [ 91.291087][ T66] worker_thread+0x58c/0xce0 [ 91.291222][ T66] kthread+0x28a/0x350 [ 91.291328][ T66] ret_from_fork+0x31/0x70 [ 91.291464][ T66] ret_from_fork_asm+0x1a/0x30 [ 91.291600][ T66] [ 91.291688][ T66] Last potentially related work creation: [ 91.291821][ T66] kasan_save_stack+0x24/0x50 [ 91.291959][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 91.292097][ T66] insert_work+0x34/0x230 [ 91.292199][ T66] __queue_work+0x5fd/0xa40 [ 91.292334][ T66] queue_delayed_work_on+0x8c/0xa0 [ 91.292471][ T66] __inet_insert_ifa+0x751/0xb10 [ 91.292610][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 91.292746][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 91.292885][ T66] netlink_rcv_skb+0x130/0x360 [ 91.293026][ T66] netlink_unicast+0x44b/0x710 [ 91.293181][ T66] netlink_sendmsg+0x723/0xbe0 [ 91.293316][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 91.293454][ T66] ___sys_sendmsg+0xee/0x170 [ 91.293589][ T66] __sys_sendmsg+0x109/0x1a0 [ 91.293726][ T66] do_syscall_64+0xc1/0x1d0 [ 91.293865][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 91.294037][ T66] [ 91.294106][ T66] Second to last potentially related work creation: [ 91.294274][ T66] kasan_save_stack+0x24/0x50 [ 91.294411][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 91.294548][ T66] insert_work+0x34/0x230 [ 91.294657][ T66] __queue_work+0x5fd/0xa40 [ 91.294795][ T66] queue_delayed_work_on+0x8c/0xa0 [ 91.294932][ T66] __inet_insert_ifa+0x751/0xb10 [ 91.295068][ T66] inetdev_event+0xb18/0xcf0 [ 91.295202][ T66] notifier_call_chain+0xcd/0x150 [ 91.295338][ T66] __dev_notify_flags+0xe6/0x250 [ 91.295474][ T66] dev_change_flags+0xec/0x160 [ 91.295609][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 91.295744][ T66] rtnl_newlink+0x6de/0xa80 [ 91.295882][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 91.296017][ T66] netlink_rcv_skb+0x130/0x360 [ 91.296153][ T66] netlink_unicast+0x44b/0x710 [ 91.296287][ T66] netlink_sendmsg+0x723/0xbe0 [ 91.296423][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 91.296557][ T66] ___sys_sendmsg+0xee/0x170 [ 91.296692][ T66] __sys_sendmsg+0x109/0x1a0 [ 91.296850][ T66] do_syscall_64+0xc1/0x1d0 [ 91.296987][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 91.297160][ T66] [ 91.297230][ T66] The buggy address belongs to the object at ffff88800c598040 [ 91.297230][ T66] which belongs to the cache net_namespace of size 6528 [ 91.297594][ T66] The buggy address is located 184 bytes inside of [ 91.297594][ T66] freed 6528-byte region [ffff88800c598040, ffff88800c5999c0) [ 91.297915][ T66] [ 91.297987][ T66] The buggy address belongs to the physical page: [ 91.298153][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc598 [ 91.298393][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 91.298594][ T66] flags: 0x80000000000040(head|node=0|zone=1) [ 91.298770][ T66] page_type: f5(slab) [ 91.298878][ T66] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffffea000014be10 [ 91.299135][ T66] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 91.299382][ T66] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffffea000014be10 [ 91.299619][ T66] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 91.299858][ T66] head: 0080000000000003 ffffea0000316601 ffffffffffffffff 0000000000000000 [ 91.300098][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 91.300341][ T66] page dumped because: kasan: bad access detected [ 91.300509][ T66] [ 91.300576][ T66] Memory state around the buggy address: [ 91.300707][ T66] ffff88800c597f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 91.300903][ T66] ffff88800c598000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 91.301093][ T66] >ffff88800c598080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 91.301292][ T66] ^ [ 91.301485][ T66] ffff88800c598100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 91.301694][ T66] ffff88800c598180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 91.301890][ T66] ================================================================== [ 91.302118][ T66] Disabling lock debugging due to kernel taint