[ 1386.969671][T17596] br1: port 1(vx1) entered blocking state [ 1386.969931][T17596] br1: port 1(vx1) entered disabled state [ 1386.970182][T17596] vx1: entered allmulticast mode [ 1386.980535][T17596] vx1: entered promiscuous mode [ 1386.981762][T17596] br1: port 1(vx1) entered blocking state [ 1386.982032][T17596] br1: port 1(vx1) entered forwarding state [ 1387.086980][T17597] br1: port 2(veth1) entered blocking state [ 1387.087719][T17597] br1: port 2(veth1) entered disabled state [ 1387.088031][T17597] veth1: entered allmulticast mode [ 1387.090013][T17597] veth1: entered promiscuous mode [ 1387.190242][ T58] br1: port 2(veth1) entered blocking state [ 1387.190702][ T58] br1: port 2(veth1) entered forwarding state [ 1387.437305][T17600] br1: port 3(veth2) entered blocking state [ 1387.437749][T17600] br1: port 3(veth2) entered disabled state [ 1387.438214][T17600] veth2: entered allmulticast mode [ 1387.440960][T17600] veth2: entered promiscuous mode [ 1387.551149][ T58] br1: port 3(veth2) entered blocking state [ 1387.551593][ T58] br1: port 3(veth2) entered forwarding state [ 1391.148320][T17653] br2: port 1(w1) entered blocking state [ 1391.148611][T17653] br2: port 1(w1) entered disabled state [ 1391.148871][T17653] w1: entered allmulticast mode [ 1391.151095][T17653] w1: entered promiscuous mode [ 1391.665940][T17659] br2: port 2(vx2) entered blocking state [ 1391.666407][T17659] br2: port 2(vx2) entered disabled state [ 1391.666824][T17659] vx2: entered allmulticast mode [ 1391.670037][T17659] vx2: entered promiscuous mode [ 1391.679085][T17659] br2: port 2(vx2) entered blocking state [ 1391.679411][T17659] br2: port 2(vx2) entered forwarding state [ 1392.394996][T10128] br2: port 1(w1) entered blocking state [ 1392.395310][T10128] br2: port 1(w1) entered forwarding state [ 1394.339412][T17692] br2: port 1(w1) entered blocking state [ 1394.339675][T17692] br2: port 1(w1) entered disabled state [ 1394.339930][T17692] w1: entered allmulticast mode [ 1394.342178][T17692] w1: entered promiscuous mode [ 1394.867316][T17698] br2: port 2(vx2) entered blocking state [ 1394.867582][T17698] br2: port 2(vx2) entered disabled state [ 1394.867897][T17698] vx2: entered allmulticast mode [ 1394.869898][T17698] vx2: entered promiscuous mode [ 1394.870806][T17698] br2: port 2(vx2) entered blocking state [ 1394.871043][T17698] br2: port 2(vx2) entered forwarding state [ 1395.490774][T10128] br2: port 1(w1) entered blocking state [ 1395.491050][T10128] br2: port 1(w1) entered forwarding state [ 1451.731522][ T66] vx2: left allmulticast mode [ 1451.731837][ T66] vx2: left promiscuous mode [ 1451.732272][ T66] br2: port 2(vx2) entered disabled state [ 1451.738015][ T66] w1: left allmulticast mode [ 1451.738273][ T66] w1: left promiscuous mode [ 1451.738593][ T66] br2: port 1(w1) entered disabled state [ 1452.137804][ T66] vx2: left allmulticast mode [ 1452.138021][ T66] vx2: left promiscuous mode [ 1452.138392][ T66] br2: port 2(vx2) entered disabled state [ 1452.140419][ T66] w1: left allmulticast mode [ 1452.140610][ T66] w1: left promiscuous mode [ 1452.140945][ T66] br2: port 1(w1) entered disabled state [ 1452.491965][ T66] ================================================================== [ 1452.492222][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 1452.492443][ T66] Read of size 8 at addr ffff88800b819a38 by task kworker/u16:1/66 [ 1452.492659][ T66] [ 1452.492737][ T66] CPU: 3 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 1452.492955][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 1452.493128][ T66] Workqueue: netns cleanup_net [ 1452.493282][ T66] Call Trace: [ 1452.493388][ T66] [ 1452.493461][ T66] dump_stack_lvl+0x82/0xd0 [ 1452.493605][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 1452.493784][ T66] ? cleanup_net+0x932/0xa40 [ 1452.493926][ T66] print_report+0xb4/0x270 [ 1452.494065][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 1452.494205][ T66] kasan_report+0xbd/0xf0 [ 1452.494311][ T66] ? cleanup_net+0x932/0xa40 [ 1452.494458][ T66] cleanup_net+0x932/0xa40 [ 1452.494601][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 1452.494744][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 1452.494881][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 1452.495024][ T66] ? lock_acquire+0x32/0xc0 [ 1452.495161][ T66] ? process_one_work+0xe0b/0x16d0 [ 1452.495303][ T66] process_one_work+0xe55/0x16d0 [ 1452.495443][ T66] ? __pfx___lock_release+0x10/0x10 [ 1452.495584][ T66] ? __pfx_process_one_work+0x10/0x10 [ 1452.495724][ T66] ? assign_work+0x16c/0x240 [ 1452.495866][ T66] worker_thread+0x58c/0xce0 [ 1452.496011][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 1452.496189][ T66] ? __pfx_worker_thread+0x10/0x10 [ 1452.496327][ T66] ? __pfx_worker_thread+0x10/0x10 [ 1452.496463][ T66] kthread+0x28a/0x350 [ 1452.496568][ T66] ? __pfx_kthread+0x10/0x10 [ 1452.496707][ T66] ret_from_fork+0x31/0x70 [ 1452.496848][ T66] ? __pfx_kthread+0x10/0x10 [ 1452.496989][ T66] ret_from_fork_asm+0x1a/0x30 [ 1452.497135][ T66] [ 1452.497241][ T66] [ 1452.497311][ T66] Allocated by task 17671: [ 1452.497449][ T66] kasan_save_stack+0x24/0x50 [ 1452.497588][ T66] kasan_save_track+0x14/0x30 [ 1452.497724][ T66] __kasan_slab_alloc+0x59/0x70 [ 1452.497861][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 1452.497998][ T66] copy_net_ns+0xc6/0x340 [ 1452.498106][ T66] create_new_namespaces+0x35f/0x920 [ 1452.498245][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 1452.498385][ T66] ksys_unshare+0x2a9/0x660 [ 1452.498529][ T66] __x64_sys_unshare+0x31/0x40 [ 1452.498666][ T66] do_syscall_64+0xc1/0x1d0 [ 1452.498807][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1452.498980][ T66] [ 1452.499051][ T66] Freed by task 66: [ 1452.499153][ T66] kasan_save_stack+0x24/0x50 [ 1452.499292][ T66] kasan_save_track+0x14/0x30 [ 1452.499430][ T66] kasan_save_free_info+0x3b/0x60 [ 1452.499571][ T66] __kasan_slab_free+0x38/0x50 [ 1452.499706][ T66] kmem_cache_free+0xf8/0x330 [ 1452.499845][ T66] cleanup_net+0x5a8/0xa40 [ 1452.499985][ T66] process_one_work+0xe55/0x16d0 [ 1452.500119][ T66] worker_thread+0x58c/0xce0 [ 1452.500255][ T66] kthread+0x28a/0x350 [ 1452.500356][ T66] ret_from_fork+0x31/0x70 [ 1452.500491][ T66] ret_from_fork_asm+0x1a/0x30 [ 1452.500631][ T66] [ 1452.500701][ T66] Last potentially related work creation: [ 1452.500846][ T66] kasan_save_stack+0x24/0x50 [ 1452.500991][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 1452.501128][ T66] insert_work+0x34/0x230 [ 1452.501231][ T66] __queue_work+0x5fd/0xa40 [ 1452.501370][ T66] queue_delayed_work_on+0x8c/0xa0 [ 1452.501507][ T66] __inet_insert_ifa+0x751/0xb10 [ 1452.501650][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 1452.501788][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 1452.501928][ T66] netlink_rcv_skb+0x130/0x360 [ 1452.502077][ T66] netlink_unicast+0x44b/0x710 [ 1452.502216][ T66] netlink_sendmsg+0x723/0xbe0 [ 1452.502353][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 1452.502490][ T66] ___sys_sendmsg+0xee/0x170 [ 1452.502632][ T66] __sys_sendmsg+0x109/0x1a0 [ 1452.502773][ T66] do_syscall_64+0xc1/0x1d0 [ 1452.502922][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 1452.503094][ T66] [ 1452.503166][ T66] The buggy address belongs to the object at ffff88800b819980 [ 1452.503166][ T66] which belongs to the cache net_namespace of size 6080 [ 1452.503532][ T66] The buggy address is located 184 bytes inside of [ 1452.503532][ T66] freed 6080-byte region [ffff88800b819980, ffff88800b81b140) [ 1452.503864][ T66] [ 1452.503937][ T66] The buggy address belongs to the physical page: [ 1452.504104][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b81b2c0 pfn:0xb818 [ 1452.504389][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 1452.504596][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 1452.504776][ T66] page_type: f5(slab) [ 1452.504890][ T66] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 1452.505139][ T66] raw: ffff88800b81b2c0 0000000000050002 00000001f5000000 0000000000000000 [ 1452.505378][ T66] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 1452.505618][ T66] head: ffff88800b81b2c0 0000000000050002 00000001f5000000 0000000000000000 [ 1452.505863][ T66] head: 0080000000000003 ffffea00002e0601 ffffffffffffffff 0000000000000000 [ 1452.506111][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 1452.506354][ T66] page dumped because: kasan: bad access detected [ 1452.506526][ T66] [ 1452.506598][ T66] Memory state around the buggy address: [ 1452.506735][ T66] ffff88800b819900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 1452.506933][ T66] ffff88800b819980: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1452.507131][ T66] >ffff88800b819a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1452.507333][ T66] ^ [ 1452.507497][ T66] ffff88800b819a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1452.507702][ T66] ffff88800b819b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 1452.507898][ T66] ================================================================== [ 1452.508121][ T66] Disabling lock debugging due to kernel taint [ 1453.657206][T17891] br1: port 3(veth2) entered disabled state [ 1453.725292][T17892] veth2: left allmulticast mode [ 1453.725508][T17892] veth2: left promiscuous mode [ 1453.725789][T17892] br1: port 3(veth2) entered disabled state [ 1453.892565][T17894] br1: port 2(veth1) entered disabled state [ 1453.945158][T17895] veth1: left allmulticast mode [ 1453.945382][T17895] veth1: left promiscuous mode [ 1453.945654][T17895] br1: port 2(veth1) entered disabled state [ 1454.001923][T17896] vx1: left allmulticast mode [ 1454.002138][T17896] vx1: left promiscuous mode [ 1454.002438][T17896] br1: port 1(vx1) entered disabled state