bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P20366/1:b..l rcu: (detected by 0, t=10502 jiffies, g=224033, q=895247 ncpus=2) task:syz.1.12941 state:R running task stack:25536 pid:20366 tgid:20362 ppid:15714 task_flags:0x400140 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5295 [inline] __schedule+0x15dd/0x52d0 kernel/sched/core.c:6908 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7235 irqentry_exit+0x599/0x620 kernel/entry/common.c:239 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:rcu_read_unlock include/linux/rcupdate.h:879 [inline] RIP: 0010:class_rcu_destructor include/linux/rcupdate.h:1193 [inline] RIP: 0010:kernfs_root+0x135/0x230 fs/kernfs/kernfs-internal.h:80 Code: 05 e8 3f 77 56 ff 4d 85 ff 4d 0f 45 f7 49 83 c6 78 4c 89 f0 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 f7 e8 de b1 c0 ff 4d 8b 36 66 d1 3e 09 89 c5 31 ff 89 c6 e8 4b 7b 56 ff 85 ed 74 10 e8 f2 RSP: 0018:ffffc90006557540 EFLAGS: 00000246 RAX: 1ffff1100824b777 RBX: ffffffff826f257c RCX: 0000000000080000 RDX: ffffc90012cb9000 RSI: 000000000007ffff RDI: 0000000000080000 RBP: 0000000000000001 R08: ffffffff826f257c R09: ffffffff8e75e420 R10: dffffc0000000000 R11: ffffed10036dbb24 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff88801b6dd800 R15: ffff88804125bb40 kernfs_new_node+0xe4/0x210 fs/kernfs/dir.c:718 __kernfs_create_file+0x4b/0x2e0 fs/kernfs/file.c:1057 sysfs_add_file_mode_ns+0x238/0x300 fs/sysfs/file.c:313 create_files fs/sysfs/group.c:82 [inline] internal_create_group+0x673/0x1180 fs/sysfs/group.c:189 internal_create_groups fs/sysfs/group.c:229 [inline] sysfs_create_groups+0x59/0x120 fs/sysfs/group.c:255 setup_gid_attrs drivers/infiniband/core/sysfs.c:1118 [inline] ib_setup_port_attrs+0x170d/0x2380 drivers/infiniband/core/sysfs.c:1394 add_one_compat_dev+0x448/0x650 drivers/infiniband/core/device.c:977 rdma_dev_init_net+0x243/0x2f0 drivers/infiniband/core/device.c:1193 ops_init+0x35c/0x5c0 net/core/net_namespace.c:137 setup_net+0x118/0x340 net/core/net_namespace.c:446 copy_net_ns+0x50e/0x730 net/core/net_namespace.c:581 create_new_namespaces+0x3e7/0x6a0 kernel/nsproxy.c:130 unshare_nsproxy_namespaces+0x11a/0x160 kernel/nsproxy.c:226 ksys_unshare+0x51d/0x930 kernel/fork.c:3174 __do_sys_unshare kernel/fork.c:3245 [inline] __se_sys_unshare kernel/fork.c:3243 [inline] __x64_sys_unshare+0x38/0x50 kernel/fork.c:3243 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fa53119c799 RSP: 002b:00007fa53200d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000110 RAX: ffffffffffffffda RBX: 00007fa531416090 RCX: 00007fa53119c799 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000000006a040000 RBP: 00007fa531232c99 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fa531416128 R14: 00007fa531416090 R15: 00007fffc2421328 bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:1b, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) net_ratelimit: 47983 callbacks suppressed bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:96:6d:7b:ad:5c:05, vlan:0) bridge0: received packet on veth0_to_bridge with own address as source address (addr:96:6d:7b:ad:5c:05, vlan:0) bridge0: received packet on bridge_slave_0 with own address as source address (addr:aa:aa:aa:aa:aa:0c, vlan:0)