[ 255.308197][ T2766] br1: port 1(vx1) entered blocking state [ 255.308479][ T2766] br1: port 1(vx1) entered disabled state [ 255.308726][ T2766] vx1: entered allmulticast mode [ 255.311078][ T2766] vx1: entered promiscuous mode [ 255.312283][ T2766] br1: port 1(vx1) entered blocking state [ 255.312599][ T2766] br1: port 1(vx1) entered forwarding state [ 255.407650][ T2767] br1: port 2(veth1) entered blocking state [ 255.408083][ T2767] br1: port 2(veth1) entered disabled state [ 255.408483][ T2767] veth1: entered allmulticast mode [ 255.410801][ T2767] veth1: entered promiscuous mode [ 255.491943][ T249] br1: port 2(veth1) entered blocking state [ 255.492224][ T249] br1: port 2(veth1) entered forwarding state [ 255.594415][ T2769] br1: port 3(veth2) entered blocking state [ 255.594767][ T2769] br1: port 3(veth2) entered disabled state [ 255.595061][ T2769] veth2: entered allmulticast mode [ 255.597016][ T2769] veth2: entered promiscuous mode [ 255.679202][ T39] br1: port 3(veth2) entered blocking state [ 255.679489][ T39] br1: port 3(veth2) entered forwarding state [ 259.131106][ T2822] br2: port 1(w1) entered blocking state [ 259.131364][ T2822] br2: port 1(w1) entered disabled state [ 259.131620][ T2822] w1: entered allmulticast mode [ 259.133889][ T2822] w1: entered promiscuous mode [ 259.638058][ T2828] br2: port 2(vx2) entered blocking state [ 259.638346][ T2828] br2: port 2(vx2) entered disabled state [ 259.638642][ T2828] vx2: entered allmulticast mode [ 259.641092][ T2828] vx2: entered promiscuous mode [ 259.642061][ T2828] br2: port 2(vx2) entered blocking state [ 259.642310][ T2828] br2: port 2(vx2) entered forwarding state [ 260.311854][ T39] br2: port 1(w1) entered blocking state [ 260.312375][ T39] br2: port 1(w1) entered forwarding state [ 262.027683][ T2859] br2: port 1(w1) entered blocking state [ 262.027950][ T2859] br2: port 1(w1) entered disabled state [ 262.028278][ T2859] w1: entered allmulticast mode [ 262.030617][ T2859] w1: entered promiscuous mode [ 262.516942][ T2865] br2: port 2(vx2) entered blocking state [ 262.517229][ T2865] br2: port 2(vx2) entered disabled state [ 262.517507][ T2865] vx2: entered allmulticast mode [ 262.519959][ T2865] vx2: entered promiscuous mode [ 262.520825][ T2865] br2: port 2(vx2) entered blocking state [ 262.521049][ T2865] br2: port 2(vx2) entered forwarding state [ 263.218120][ T249] br2: port 1(w1) entered blocking state [ 263.218434][ T249] br2: port 1(w1) entered forwarding state [ 275.085517][ T66] vx2: left allmulticast mode [ 275.085766][ T66] vx2: left promiscuous mode [ 275.086123][ T66] br2: port 2(vx2) entered disabled state [ 275.088329][ T66] w1: left allmulticast mode [ 275.088569][ T66] w1: left promiscuous mode [ 275.088900][ T66] br2: port 1(w1) entered disabled state [ 275.472116][ T66] ================================================================== [ 275.472374][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 275.472593][ T66] Read of size 8 at addr ffff88800f1a80f8 by task kworker/u16:1/66 [ 275.472796][ T66] [ 275.472873][ T66] CPU: 3 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 275.473095][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 275.473268][ T66] Workqueue: netns cleanup_net [ 275.473419][ T66] Call Trace: [ 275.473527][ T66] [ 275.473604][ T66] dump_stack_lvl+0x82/0xd0 [ 275.473745][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 275.473918][ T66] ? cleanup_net+0x932/0xa40 [ 275.474058][ T66] print_report+0xb4/0x270 [ 275.474189][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 275.474319][ T66] kasan_report+0xbd/0xf0 [ 275.474422][ T66] ? cleanup_net+0x932/0xa40 [ 275.474551][ T66] cleanup_net+0x932/0xa40 [ 275.474697][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 275.474856][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 275.474990][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 275.475124][ T66] ? lock_acquire+0x32/0xc0 [ 275.475254][ T66] ? process_one_work+0xe0b/0x16d0 [ 275.475391][ T66] process_one_work+0xe55/0x16d0 [ 275.475521][ T66] ? __pfx___lock_release+0x10/0x10 [ 275.475649][ T66] ? __pfx_process_one_work+0x10/0x10 [ 275.475786][ T66] ? assign_work+0x16c/0x240 [ 275.475914][ T66] worker_thread+0x58c/0xce0 [ 275.476040][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 275.476199][ T66] ? __pfx_worker_thread+0x10/0x10 [ 275.476328][ T66] ? __pfx_worker_thread+0x10/0x10 [ 275.476479][ T66] kthread+0x28a/0x350 [ 275.476621][ T66] ? __pfx_kthread+0x10/0x10 [ 275.476814][ T66] ret_from_fork+0x31/0x70 [ 275.477016][ T66] ? __pfx_kthread+0x10/0x10 [ 275.477210][ T66] ret_from_fork_asm+0x1a/0x30 [ 275.477373][ T66] [ 275.477507][ T66] [ 275.477602][ T66] Allocated by task 386: [ 275.477754][ T66] kasan_save_stack+0x24/0x50 [ 275.477968][ T66] kasan_save_track+0x14/0x30 [ 275.478170][ T66] __kasan_slab_alloc+0x59/0x70 [ 275.478372][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 275.478586][ T66] copy_net_ns+0xc6/0x340 [ 275.478744][ T66] create_new_namespaces+0x35f/0x920 [ 275.478946][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 275.479145][ T66] ksys_unshare+0x2a9/0x660 [ 275.479332][ T66] __x64_sys_unshare+0x31/0x40 [ 275.479515][ T66] do_syscall_64+0xc1/0x1d0 [ 275.479710][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 275.479970][ T66] [ 275.480074][ T66] Freed by task 66: [ 275.480224][ T66] kasan_save_stack+0x24/0x50 [ 275.480435][ T66] kasan_save_track+0x14/0x30 [ 275.480636][ T66] kasan_save_free_info+0x3b/0x60 [ 275.480850][ T66] __kasan_slab_free+0x38/0x50 [ 275.481051][ T66] kmem_cache_free+0xf8/0x330 [ 275.481243][ T66] cleanup_net+0x5a8/0xa40 [ 275.481438][ T66] process_one_work+0xe55/0x16d0 [ 275.481589][ T66] worker_thread+0x58c/0xce0 [ 275.481788][ T66] kthread+0x28a/0x350 [ 275.481948][ T66] ret_from_fork+0x31/0x70 [ 275.482148][ T66] ret_from_fork_asm+0x1a/0x30 [ 275.482348][ T66] [ 275.482453][ T66] Last potentially related work creation: [ 275.482657][ T66] kasan_save_stack+0x24/0x50 [ 275.482841][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 275.483060][ T66] insert_work+0x34/0x230 [ 275.483220][ T66] __queue_work+0x5fd/0xa40 [ 275.483424][ T66] queue_delayed_work_on+0x8c/0xa0 [ 275.483625][ T66] __inet_insert_ifa+0x751/0xb10 [ 275.483822][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 275.483959][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 275.484093][ T66] netlink_rcv_skb+0x130/0x360 [ 275.484224][ T66] netlink_unicast+0x44b/0x710 [ 275.484363][ T66] netlink_sendmsg+0x723/0xbe0 [ 275.484495][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 275.484639][ T66] ___sys_sendmsg+0xee/0x170 [ 275.484777][ T66] __sys_sendmsg+0x109/0x1a0 [ 275.484912][ T66] do_syscall_64+0xc1/0x1d0 [ 275.485048][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 275.485213][ T66] [ 275.485282][ T66] Second to last potentially related work creation: [ 275.485452][ T66] kasan_save_stack+0x24/0x50 [ 275.485593][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 275.485739][ T66] insert_work+0x34/0x230 [ 275.485841][ T66] __queue_work+0x5fd/0xa40 [ 275.485977][ T66] queue_delayed_work_on+0x8c/0xa0 [ 275.486108][ T66] __inet_insert_ifa+0x751/0xb10 [ 275.486238][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 275.486373][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 275.486503][ T66] netlink_rcv_skb+0x130/0x360 [ 275.486642][ T66] netlink_unicast+0x44b/0x710 [ 275.486775][ T66] netlink_sendmsg+0x723/0xbe0 [ 275.486960][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 275.487156][ T66] ___sys_sendmsg+0xee/0x170 [ 275.487358][ T66] __sys_sendmsg+0x109/0x1a0 [ 275.487551][ T66] do_syscall_64+0xc1/0x1d0 [ 275.487750][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 275.487992][ T66] [ 275.488098][ T66] The buggy address belongs to the object at ffff88800f1a8040 [ 275.488098][ T66] which belongs to the cache net_namespace of size 6080 [ 275.488615][ T66] The buggy address is located 184 bytes inside of [ 275.488615][ T66] freed 6080-byte region [ffff88800f1a8040, ffff88800f1a9800) [ 275.489111][ T66] [ 275.489212][ T66] The buggy address belongs to the physical page: [ 275.489450][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800f1acc00 pfn:0xf1a8 [ 275.489886][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 275.490198][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 275.490478][ T66] page_type: f5(slab) [ 275.490648][ T66] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 275.491033][ T66] raw: ffff88800f1acc00 0000000000050003 00000001f5000000 0000000000000000 [ 275.491402][ T66] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 275.491787][ T66] head: ffff88800f1acc00 0000000000050003 00000001f5000000 0000000000000000 [ 275.492192][ T66] head: 0080000000000003 ffffea00003c6a01 ffffffffffffffff 0000000000000000 [ 275.492558][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 275.492926][ T66] page dumped because: kasan: bad access detected [ 275.493189][ T66] [ 275.493303][ T66] Memory state around the buggy address: [ 275.493522][ T66] ffff88800f1a7f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 275.493836][ T66] ffff88800f1a8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 275.494121][ T66] >ffff88800f1a8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 275.494371][ T66] ^ [ 275.494573][ T66] ffff88800f1a8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 275.494802][ T66] ffff88800f1a8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 275.494998][ T66] ================================================================== [ 275.495290][ T66] Disabling lock debugging due to kernel taint [ 275.552099][ T66] vx2: left allmulticast mode [ 275.552298][ T66] vx2: left promiscuous mode [ 275.552656][ T66] br2: port 2(vx2) entered disabled state [ 275.554378][ T66] w1: left allmulticast mode [ 275.554728][ T66] w1: left promiscuous mode [ 275.555255][ T66] br2: port 1(w1) entered disabled state [ 277.292271][ T2981] vx1: left allmulticast mode [ 277.293285][ T2981] vx1: left promiscuous mode [ 277.293566][ T2981] br1: port 1(vx1) entered disabled state [ 277.531243][ T2984] br1: port 3(veth2) entered disabled state [ 277.585029][ T2985] veth2: left allmulticast mode [ 277.585272][ T2985] veth2: left promiscuous mode [ 277.585571][ T2985] br1: port 3(veth2) entered disabled state [ 277.653702][ T2986] br1: port 2(veth1) entered disabled state [ 277.708882][ T2987] veth1: left allmulticast mode [ 277.709143][ T2987] veth1: left promiscuous mode [ 277.709442][ T2987] br1: port 2(veth1) entered disabled state