[ 20.149794][ T324] br1: port 1(veth1) entered blocking state [ 20.150405][ T324] br1: port 1(veth1) entered disabled state [ 20.150928][ T324] veth1: entered allmulticast mode [ 20.154542][ T324] veth1: entered promiscuous mode [ 20.477006][ T37] br1: port 1(veth1) entered blocking state [ 20.477574][ T37] br1: port 1(veth1) entered forwarding state [ 20.649655][ T338] br1: port 2(veth2) entered blocking state [ 20.650110][ T338] br1: port 2(veth2) entered disabled state [ 20.650536][ T338] veth2: entered allmulticast mode [ 20.654269][ T338] veth2: entered promiscuous mode [ 20.960428][ T38] br1: port 2(veth2) entered blocking state [ 20.960868][ T38] br1: port 2(veth2) entered forwarding state [ 41.710110][ T557] br1: port 2(veth2) entered disabled state [ 41.845018][ T559] veth2: left allmulticast mode [ 41.845449][ T559] veth2: left promiscuous mode [ 41.846015][ T559] br1: port 2(veth2) entered disabled state [ 41.989537][ T561] br1: port 1(veth1) entered disabled state [ 42.134515][ T563] veth1: left allmulticast mode [ 42.134871][ T563] veth1: left promiscuous mode [ 42.135467][ T563] br1: port 1(veth1) entered disabled state [ 42.435864][ T567] ================================================================== [ 42.436187][ T567] BUG: KASAN: slab-use-after-free in kobject_put+0xbb/0xd0 [ 42.436464][ T567] Read of size 1 at addr ffff88800a0426ac by task ip/567 [ 42.436679][ T567] [ 42.436776][ T567] CPU: 2 UID: 0 PID: 567 Comm: ip Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full) [ 42.436782][ T567] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 42.436786][ T567] Call Trace: [ 42.436790][ T567] [ 42.436792][ T567] dump_stack_lvl+0x82/0xc0 [ 42.436798][ T567] print_address_description.constprop.0+0x2c/0x3a0 [ 42.436810][ T567] ? kobject_put+0xbb/0xd0 [ 42.436814][ T567] print_report+0xb4/0x270 [ 42.436817][ T567] ? kobject_put+0xbb/0xd0 [ 42.436820][ T567] ? kasan_addr_to_slab+0x21/0x70 [ 42.436823][ T567] ? kobject_put+0xbb/0xd0 [ 42.436826][ T567] kasan_report+0xca/0x100 [ 42.436830][ T567] ? kobject_put+0xbb/0xd0 [ 42.436835][ T567] kobject_put+0xbb/0xd0 [ 42.436839][ T567] netdev_run_todo+0x5f0/0xc60 [ 42.436848][ T567] ? dev_ingress_queue_create+0x190/0x190 [ 42.436851][ T567] ? generic_xdp_install+0x410/0x410 [ 42.436854][ T567] ? kernfs_put.part.0+0x12d/0x480 [ 42.436862][ T567] ? unregister_netdevice_many+0x20/0x20 [ 42.436868][ T567] ? br_dev_delete+0x115/0x1a0 [bridge] [ 42.436906][ T567] rtnl_dellink+0x350/0xa30 [ 42.436911][ T567] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 42.436936][ T567] ? find_held_lock+0x2b/0x80 [ 42.436947][ T567] ? __lock_acquire+0x449/0x7e0 [ 42.436952][ T567] ? find_held_lock+0x2b/0x80 [ 42.436956][ T567] ? rtnetlink_rcv_msg+0x6e6/0xc00 [ 42.436958][ T567] ? __lock_release+0x5d/0x170 [ 42.436963][ T567] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 42.436966][ T567] rtnetlink_rcv_msg+0x709/0xc00 [ 42.436970][ T567] ? rtnl_port_fill+0x850/0x850 [ 42.436972][ T567] ? __lock_acquire+0x449/0x7e0 [ 42.436979][ T567] netlink_rcv_skb+0x121/0x340 [ 42.436983][ T567] ? rtnl_port_fill+0x850/0x850 [ 42.436986][ T567] ? netlink_ack+0xdd0/0xdd0 [ 42.436993][ T567] ? netlink_deliver_tap+0x13e/0x340 [ 42.436995][ T567] ? netlink_deliver_tap+0xc3/0x340 [ 42.436999][ T567] netlink_unicast+0x4aa/0x780 [ 42.437003][ T567] ? netlink_attachskb+0x810/0x810 [ 42.437007][ T567] ? __lock_acquire+0x449/0x7e0 [ 42.437012][ T567] netlink_sendmsg+0x714/0xbd0 [ 42.437017][ T567] ? netlink_unicast+0x780/0x780 [ 42.437020][ T567] ? __import_iovec+0x230/0x3b0 [ 42.437028][ T567] ? netlink_unicast+0x780/0x780 [ 42.437032][ T567] ____sys_sendmsg+0x3dd/0x890 [ 42.437039][ T567] ? get_timestamp.constprop.0+0x380/0x380 [ 42.437043][ T567] ? __copy_msghdr+0x3c0/0x3c0 [ 42.437052][ T567] ___sys_sendmsg+0xed/0x170 [ 42.437055][ T567] ? kasan_record_aux_stack+0x8c/0xa0 [ 42.437057][ T567] ? __call_rcu_common.constprop.0+0xa8/0x630 [ 42.437063][ T567] ? copy_msghdr_from_user+0x110/0x110 [ 42.437069][ T567] ? find_held_lock+0x2b/0x80 [ 42.437073][ T567] ? __lock_acquire+0x449/0x7e0 [ 42.437078][ T567] ? find_held_lock+0x2b/0x80 [ 42.437082][ T567] ? __virt_addr_valid+0x22a/0x450 [ 42.437088][ T567] ? __lock_release+0x5d/0x170 [ 42.437094][ T567] __sys_sendmsg+0x10b/0x1a0 [ 42.437097][ T567] ? __call_rcu_common.constprop.0+0x318/0x630 [ 42.437101][ T567] ? __sys_sendmsg_sock+0x20/0x20 [ 42.437109][ T567] ? rcu_is_watching+0x12/0xb0 [ 42.437112][ T567] do_syscall_64+0xc1/0xfd0 [ 42.437119][ T567] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 42.437123][ T567] RIP: 0033:0x7f9d67ebd1d7 [ 42.437130][ T567] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 42.437133][ T567] RSP: 002b:00007ffcbe004928 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 42.437137][ T567] RAX: ffffffffffffffda RBX: 00007ffcbe005050 RCX: 00007f9d67ebd1d7 [ 42.437139][ T567] RDX: 0000000000000000 RSI: 00007ffcbe004990 RDI: 0000000000000005 [ 42.437141][ T567] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 42.437143][ T567] R10: 00007f9d67db9f60 R11: 0000000000000246 R12: 0000000000000002 [ 42.437144][ T567] R13: 00000000690dfa57 R14: 0000000000499600 R15: 0000000000000000 [ 42.437151][ T567] [ 42.437152][ T567] [ 42.450842][ T567] Allocated by task 309: [ 42.450982][ T567] kasan_save_stack+0x24/0x40 [ 42.451178][ T567] kasan_save_track+0x14/0x30 [ 42.451366][ T567] __kasan_kmalloc+0x7b/0x90 [ 42.451549][ T567] __kvmalloc_node_noprof+0x2e5/0x8e0 [ 42.451730][ T567] alloc_netdev_mqs+0x7d/0x1370 [ 42.451914][ T567] rtnl_create_link+0xa9e/0xe20 [ 42.452096][ T567] rtnl_newlink_create+0x203/0x770 [ 42.452278][ T567] __rtnl_newlink+0x231/0xa30 [ 42.452466][ T567] rtnl_newlink+0x693/0xa60 [ 42.452641][ T567] rtnetlink_rcv_msg+0x709/0xc00 [ 42.452820][ T567] netlink_rcv_skb+0x121/0x340 [ 42.453002][ T567] netlink_unicast+0x4aa/0x780 [ 42.453182][ T567] netlink_sendmsg+0x714/0xbd0 [ 42.453371][ T567] ____sys_sendmsg+0x3dd/0x890 [ 42.453548][ T567] ___sys_sendmsg+0xed/0x170 [ 42.453730][ T567] __sys_sendmsg+0x10b/0x1a0 [ 42.453912][ T567] do_syscall_64+0xc1/0xfd0 [ 42.454095][ T567] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 42.454314][ T567] [ 42.454419][ T567] Freed by task 567: [ 42.454555][ T567] kasan_save_stack+0x24/0x40 [ 42.454734][ T567] kasan_save_track+0x14/0x30 [ 42.454912][ T567] __kasan_save_free_info+0x3b/0x60 [ 42.455097][ T567] __kasan_slab_free+0x3f/0x60 [ 42.455274][ T567] kfree+0x21d/0x540 [ 42.455420][ T567] device_release+0x9c/0x210 [ 42.455605][ T567] kobject_cleanup+0xfe/0x360 [ 42.455785][ T567] netdev_run_todo+0x81f/0xc60 [ 42.455972][ T567] rtnl_dellink+0x350/0xa30 [ 42.456155][ T567] rtnetlink_rcv_msg+0x709/0xc00 [ 42.456329][ T567] netlink_rcv_skb+0x121/0x340 [ 42.456513][ T567] netlink_unicast+0x4aa/0x780 [ 42.456701][ T567] netlink_sendmsg+0x714/0xbd0 [ 42.456900][ T567] ____sys_sendmsg+0x3dd/0x890 [ 42.457077][ T567] ___sys_sendmsg+0xed/0x170 [ 42.457257][ T567] __sys_sendmsg+0x10b/0x1a0 [ 42.457449][ T567] do_syscall_64+0xc1/0xfd0 [ 42.457629][ T567] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 42.457850][ T567] [ 42.457946][ T567] Last potentially related work creation: [ 42.458126][ T567] kasan_save_stack+0x24/0x40 [ 42.458305][ T567] kasan_record_aux_stack+0x8c/0xa0 [ 42.458496][ T567] insert_work+0x34/0x230 [ 42.458632][ T567] __queue_work+0x5fd/0xab0 [ 42.458816][ T567] queue_work_on+0x84/0x90 [ 42.459011][ T567] fdb_delete+0x7bf/0xd50 [bridge] [ 42.459217][ T567] br_fdb_delete_by_port+0x1ce/0x260 [bridge] [ 42.459475][ T567] del_nbp+0x374/0xbe0 [bridge] [ 42.459680][ T567] br_del_if+0xa3/0x1e0 [bridge] [ 42.459878][ T567] do_set_master+0x144/0x4f0 [ 42.460071][ T567] do_setlink.constprop.0+0x9ee/0x2460 [ 42.460261][ T567] rtnl_newlink+0x693/0xa60 [ 42.460447][ T567] rtnetlink_rcv_msg+0x709/0xc00 [ 42.460638][ T567] netlink_rcv_skb+0x121/0x340 [ 42.460816][ T567] netlink_unicast+0x4aa/0x780 [ 42.461003][ T567] netlink_sendmsg+0x714/0xbd0 [ 42.461293][ T567] ____sys_sendmsg+0x3dd/0x890 [ 42.461476][ T567] ___sys_sendmsg+0xed/0x170 [ 42.461664][ T567] __sys_sendmsg+0x10b/0x1a0 [ 42.461843][ T567] do_syscall_64+0xc1/0xfd0 [ 42.462031][ T567] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 42.462265][ T567] [ 42.462358][ T567] Second to last potentially related work creation: [ 42.462583][ T567] kasan_save_stack+0x24/0x40 [ 42.462865][ T567] kasan_record_aux_stack+0x8c/0xa0 [ 42.463049][ T567] insert_work+0x34/0x230 [ 42.463189][ T567] __queue_work+0x5fd/0xab0 [ 42.463369][ T567] call_timer_fn+0x13a/0x220 [ 42.463666][ T567] __run_timers+0x3f9/0x810 [ 42.463844][ T567] run_timer_softirq+0xa3/0xf0 [ 42.464025][ T567] handle_softirqs+0x215/0x610 [ 42.464217][ T567] irq_exit_rcu+0xab/0x100 [ 42.464492][ T567] sysvec_apic_timer_interrupt+0xa8/0xc0 [ 42.464680][ T567] asm_sysvec_apic_timer_interrupt+0x1a/0x20 [ 42.464904][ T567] [ 42.464995][ T567] The buggy address belongs to the object at ffff88800a042000 [ 42.464995][ T567] which belongs to the cache kmalloc-8k of size 8192 [ 42.465634][ T567] The buggy address is located 1708 bytes inside of [ 42.465634][ T567] freed 8192-byte region [ffff88800a042000, ffff88800a044000) [ 42.466082][ T567] [ 42.466268][ T567] The buggy address belongs to the physical page: [ 42.466486][ T567] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa040 [ 42.466820][ T567] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 42.467088][ T567] flags: 0x80000000000040(head|node=0|zone=1) [ 42.467318][ T567] page_type: f5(slab) [ 42.467456][ T567] raw: 0080000000000040 ffff8880010438c0 ffffea000013c210 ffffea00003f2a10 [ 42.467784][ T567] raw: 0000000000000000 0000000000010001 00000000f5000000 0000000000000000 [ 42.468123][ T567] head: 0080000000000040 ffff8880010438c0 ffffea000013c210 ffffea00003f2a10 [ 42.468657][ T567] head: 0000000000000000 0000000000010001 00000000f5000000 0000000000000000 [ 42.468987][ T567] head: 0080000000000003 ffffea0000281001 00000000ffffffff 00000000ffffffff [ 42.469311][ T567] head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 [ 42.469632][ T567] page dumped because: kasan: bad access detected [ 42.469962][ T567] [ 42.470061][ T567] Memory state around the buggy address: [ 42.470331][ T567] ffff88800a042580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.470588][ T567] ffff88800a042600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.470949][ T567] >ffff88800a042680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.471308][ T567] ^ [ 42.471482][ T567] ffff88800a042700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.471829][ T567] ffff88800a042780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.472188][ T567] ================================================================== [ 42.472519][ T567] Disabling lock debugging due to kernel taint [ 42.472765][ T567] ------------[ cut here ]------------ [ 42.473062][ T567] refcount_t: underflow; use-after-free. [ 42.473290][ T567] WARNING: CPU: 2 PID: 567 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0 [ 42.473619][ T567] Modules linked in: bridge stp llc vrf veth [ 42.473888][ T567] CPU: 2 UID: 0 PID: 567 Comm: ip Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full) [ 42.474385][ T567] Tainted: [B]=BAD_PAGE [ 42.474541][ T567] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 42.474783][ T567] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0 [ 42.475063][ T567] Code: 7d 93 02 80 fb 01 0f 87 bb 99 d9 fe 83 e3 01 0f 85 51 ff ff ff c6 05 a8 7d 93 02 01 90 48 c7 c7 60 8d 45 b7 e8 32 bf 18 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 b0 63 a1 ff e9 ba fe ff ff [ 42.475817][ T567] RSP: 0018:ffffc90000da71f0 EFLAGS: 00010286 [ 42.476100][ T567] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 42.476387][ T567] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001 [ 42.476778][ T567] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff6fbe134 [ 42.477098][ T567] R10: 0000000000000003 R11: ffffc90000da6d80 R12: 0000000000000001 [ 42.477386][ T567] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100 [ 42.477671][ T567] FS: 00007f9d67cef800(0000) GS:ffff88807d0f2000(0000) knlGS:0000000000000000 [ 42.478135][ T567] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.478486][ T567] CR2: 00000000004e68d0 CR3: 0000000004aec003 CR4: 0000000000772ef0 [ 42.478770][ T567] PKRU: 55555554 [ 42.478936][ T567] Call Trace: [ 42.479106][ T567] [ 42.479222][ T567] netdev_run_todo+0x5f0/0xc60 [ 42.479448][ T567] ? dev_ingress_queue_create+0x190/0x190 [ 42.479652][ T567] ? generic_xdp_install+0x410/0x410 [ 42.479847][ T567] ? kernfs_put.part.0+0x12d/0x480 [ 42.480181][ T567] ? unregister_netdevice_many+0x20/0x20 [ 42.480382][ T567] ? br_dev_delete+0x115/0x1a0 [bridge] [ 42.480605][ T567] rtnl_dellink+0x350/0xa30 [ 42.480801][ T567] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 42.481080][ T567] ? find_held_lock+0x2b/0x80 [ 42.481294][ T567] ? __lock_acquire+0x449/0x7e0 [ 42.481493][ T567] ? find_held_lock+0x2b/0x80 [ 42.481689][ T567] ? rtnetlink_rcv_msg+0x6e6/0xc00 [ 42.481989][ T567] ? __lock_release+0x5d/0x170 [ 42.482209][ T567] ? valid_bridge_getlink_req.constprop.0+0x640/0x640 [ 42.482445][ T567] rtnetlink_rcv_msg+0x709/0xc00 [ 42.482646][ T567] ? rtnl_port_fill+0x850/0x850 [ 42.482952][ T567] ? __lock_acquire+0x449/0x7e0 [ 42.483176][ T567] netlink_rcv_skb+0x121/0x340 [ 42.483375][ T567] ? rtnl_port_fill+0x850/0x850 [ 42.483572][ T567] ? netlink_ack+0xdd0/0xdd0 [ 42.483872][ T567] ? netlink_deliver_tap+0x13e/0x340 [ 42.484090][ T567] ? netlink_deliver_tap+0xc3/0x340 [ 42.484313][ T567] netlink_unicast+0x4aa/0x780 [ 42.484517][ T567] ? netlink_attachskb+0x810/0x810 [ 42.484807][ T567] ? __lock_acquire+0x449/0x7e0 [ 42.485018][ T567] netlink_sendmsg+0x714/0xbd0 [ 42.485226][ T567] ? netlink_unicast+0x780/0x780 [ 42.485422][ T567] ? __import_iovec+0x230/0x3b0 [ 42.485714][ T567] ? netlink_unicast+0x780/0x780 [ 42.485922][ T567] ____sys_sendmsg+0x3dd/0x890 [ 42.486137][ T567] ? get_timestamp.constprop.0+0x380/0x380 [ 42.486472][ T567] ? __copy_msghdr+0x3c0/0x3c0 [ 42.486673][ T567] ___sys_sendmsg+0xed/0x170 [ 42.486873][ T567] ? kasan_record_aux_stack+0x8c/0xa0 [ 42.487089][ T567] ? __call_rcu_common.constprop.0+0xa8/0x630 [ 42.487429][ T567] ? copy_msghdr_from_user+0x110/0x110 [ 42.487627][ T567] ? find_held_lock+0x2b/0x80 [ 42.487822][ T567] ? __lock_acquire+0x449/0x7e0 [ 42.488038][ T567] ? find_held_lock+0x2b/0x80 [ 42.488335][ T567] ? __virt_addr_valid+0x22a/0x450 [ 42.488538][ T567] ? __lock_release+0x5d/0x170 [ 42.488736][ T567] __sys_sendmsg+0x10b/0x1a0 [ 42.488951][ T567] ? __call_rcu_common.constprop.0+0x318/0x630 [ 42.489195][ T567] ? __sys_sendmsg_sock+0x20/0x20 [ 42.489414][ T567] ? rcu_is_watching+0x12/0xb0 [ 42.489610][ T567] do_syscall_64+0xc1/0xfd0 [ 42.489817][ T567] entry_SYSCALL_64_after_hwframe+0x4b/0x53 [ 42.490063][ T567] RIP: 0033:0x7f9d67ebd1d7 [ 42.490274][ T567] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 42.490940][ T567] RSP: 002b:00007ffcbe004928 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 42.491252][ T567] RAX: ffffffffffffffda RBX: 00007ffcbe005050 RCX: 00007f9d67ebd1d7 [ 42.491656][ T567] RDX: 0000000000000000 RSI: 00007ffcbe004990 RDI: 0000000000000005 [ 42.491965][ T567] RBP: 0000000000000002 R08: 0000000000000003 R09: 0000000000000078 [ 42.492269][ T567] R10: 00007f9d67db9f60 R11: 0000000000000246 R12: 0000000000000002 [ 42.492669][ T567] R13: 00000000690dfa57 R14: 0000000000499600 R15: 0000000000000000 [ 42.492985][ T567] [ 42.493155][ T567] irq event stamp: 44693 [ 42.493310][ T567] hardirqs last enabled at (44693): [] irqentry_exit+0x3b/0x80 [ 42.493750][ T567] hardirqs last disabled at (44692): [] handle_softirqs+0x47f/0x610 [ 42.494110][ T567] softirqs last enabled at (44518): [] handle_softirqs+0x352/0x610 [ 42.494544][ T567] softirqs last disabled at (44511): [] irq_exit_rcu+0xab/0x100 [ 42.494869][ T567] ---[ end trace 0000000000000000 ]---