RBP: 00007f898c6d5ca0 R08: 0000000000000430 R09: 0000000000000000 R10: 0000000020001080 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffde5fd2ddf R14: 00007f898c6d69c0 R15: 000000000118cf4c syz-executor.1: ====================================================== WARNING: possible circular locking dependency detected 4.14.195-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/21122 is trying to acquire lock: (console_owner){-.-.}, at: [] console_trylock_spinning kernel/printk/printk.c:1658 [inline] (console_owner){-.-.}, at: [] vprintk_emit+0x32a/0x620 kernel/printk/printk.c:1922 but task is already holding lock: (&(&port->lock)->rlock){-.-.}, at: [] tty_port_close_start.part.0+0x28/0x4c0 drivers/tty/tty_port.c:573 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&(&port->lock)->rlock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 tty_port_tty_get+0x1d/0x80 drivers/tty/tty_port.c:288 tty_port_default_wakeup+0x11/0x40 drivers/tty/tty_port.c:46 serial8250_tx_chars+0x3fe/0xbf0 drivers/tty/serial/8250/8250_port.c:1810 serial8250_handle_irq.part.0+0x1f8/0x240 drivers/tty/serial/8250/8250_port.c:1883 serial8250_handle_irq drivers/tty/serial/8250/8250_port.c:1869 [inline] serial8250_default_handle_irq+0x8a/0x1f0 drivers/tty/serial/8250/8250_port.c:1899 serial8250_interrupt+0xe4/0x1a0 drivers/tty/serial/8250/8250_core.c:129 __handle_irq_event_percpu+0xee/0x7f0 kernel/irq/handle.c:147 handle_irq_event_percpu kernel/irq/handle.c:187 [inline] handle_irq_event+0xf0/0x246 kernel/irq/handle.c:204 handle_edge_irq+0x224/0xc40 kernel/irq/chip.c:770 generic_handle_irq_desc include/linux/irqdesc.h:159 [inline] handle_irq+0x35/0x50 arch/x86/kernel/irq_64.c:87 do_IRQ+0x93/0x1d0 arch/x86/kernel/irq.c:230 ret_from_intr+0x0/0x1e native_safe_halt+0xe/0x10 arch/x86/include/asm/irqflags.h:60 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0x47/0x370 arch/x86/kernel/process.c:558 cpuidle_idle_call kernel/sched/idle.c:156 [inline] do_idle+0x250/0x3c0 kernel/sched/idle.c:246 cpu_startup_entry+0x14/0x20 kernel/sched/idle.c:351 start_kernel+0x750/0x770 init/main.c:708 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240 -> #1 (&port_lock_key){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:160 serial8250_console_write+0x7a7/0x9d0 drivers/tty/serial/8250/8250_port.c:3236 call_console_drivers kernel/printk/printk.c:1725 [inline] console_unlock+0x99d/0xf20 kernel/printk/printk.c:2397 vprintk_emit+0x224/0x620 kernel/printk/printk.c:1923 vprintk_func+0x58/0x152 kernel/printk/printk_safe.c:401 printk+0x9e/0xbc kernel/printk/printk.c:1996 register_console+0x6f4/0xad0 kernel/printk/printk.c:2716 univ8250_console_init+0x2f/0x3a drivers/tty/serial/8250/8250_core.c:691 console_init+0x46/0x53 kernel/printk/printk.c:2797 start_kernel+0x52e/0x770 init/main.c:634 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:240 -> #0 (console_owner){-.-.}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 console_trylock_spinning kernel/printk/printk.c:1679 [inline] vprintk_emit+0x367/0x620 kernel/printk/printk.c:1922 vprintk_func+0x58/0x152 kernel/printk/printk_safe.c:401 printk+0x9e/0xbc kernel/printk/printk.c:1996 tty_port_close_start.part.0+0x46c/0x4c0 drivers/tty/tty_port.c:575 tty_port_close_start drivers/tty/tty_port.c:647 [inline] tty_port_close+0x3b/0x130 drivers/tty/tty_port.c:640 tty_release+0x402/0xe20 drivers/tty/tty_io.c:1670 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb other info that might help us debug this: Chain exists of: console_owner --> &port_lock_key --> &(&port->lock)->rlock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&(&port->lock)->rlock); lock(&port_lock_key); lock(&(&port->lock)->rlock); lock(console_owner); *** DEADLOCK *** 2 locks held by syz-executor.3/21122: #0: (&tty->legacy_mutex){+.+.}, at: [] tty_lock+0x5f/0x70 drivers/tty/tty_mutex.c:19 #1: (&(&port->lock)->rlock){-.-.}, at: [] tty_port_close_start.part.0+0x28/0x4c0 drivers/tty/tty_port.c:573 stack backtrace: CPU: 1 PID: 21122 Comm: syz-executor.3 Not tainted 4.14.195-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 console_trylock_spinning kernel/printk/printk.c:1679 [inline] vprintk_emit+0x367/0x620 kernel/printk/printk.c:1922 vprintk_func+0x58/0x152 kernel/printk/printk_safe.c:401 printk+0x9e/0xbc kernel/printk/printk.c:1996 tty_port_close_start.part.0+0x46c/0x4c0 drivers/tty/tty_port.c:575 tty_port_close_start drivers/tty/tty_port.c:647 [inline] tty_port_close+0x3b/0x130 drivers/tty/tty_port.c:640 tty_release+0x402/0xe20 drivers/tty/tty_io.c:1670 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45d5b9 RSP: 002b:00007f0f11d68c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000021 RAX: 0000000000000005 RBX: 00000000000029c0 RCX: 000000000045d5b9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 RBP: 000000000118cf78 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118cf4c R13: 00007ffc66823eef R14: 00007f0f11d699c0 R15: 000000000118cf4c hub 9-0:1.0: USB hub found vmalloc: allocation failure: 64 bytes hub 9-0:1.0: 8 ports detected , mode:0x14080c0(GFP_KERNEL|__GFP_ZERO), nodemask=(null) syz-executor.1 cpuset=/ mems_allowed=0-1 CPU: 0 PID: 21114 Comm: syz-executor.1 Not tainted 4.14.195-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x283 lib/dump_stack.c:58 warn_alloc.cold+0x96/0x1cc mm/page_alloc.c:3254 __vmalloc_node_range mm/vmalloc.c:1789 [inline] __vmalloc_node mm/vmalloc.c:1818 [inline] __vmalloc_node_flags mm/vmalloc.c:1832 [inline] vzalloc+0x122/0x150 mm/vmalloc.c:1871 xt_counters_alloc+0x30/0x50 net/netfilter/x_tables.c:1216 __do_replace+0x79/0x580 net/ipv6/netfilter/ip6_tables.c:1069 do_replace net/ipv6/netfilter/ip6_tables.c:1161 [inline] do_ip6t_set_ctl+0x256/0x3a4 net/ipv6/netfilter/ip6_tables.c:1685 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x5f/0xb0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0xc0/0x120 net/ipv6/ipv6_sockglue.c:937 tcp_setsockopt+0x7b/0xc0 net/ipv4/tcp.c:2828 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x110/0x1e0 net/socket.c:1844 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x45d5b9 RSP: 002b:00007f898c6d5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000002dbc0 RCX: 000000000045d5b9 RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000004 RBP: 00007f898c6d5ca0 R08: 0000000000000430 R09: 0000000000000000 R10: 0000000020001080 R11: 0000000000000246 R12: 0000000000000002 R13: 00007ffde5fd2ddf R14: 00007f898c6d69c0 R15: 000000000118cf4c Mem-Info: active_anon:155908 inactive_anon:4056 isolated_anon:0 active_file:7202 inactive_file:11130 isolated_file:0 unevictable:0 dirty:354 writeback:0 unstable:0 slab_reclaimable:17956 slab_unreclaimable:121600 mapped:61001 shmem:4239 pagetables:1413 bounce:0 free:1212232 free_pcp:345 free_cma:0 Node 0 active_anon:623600kB inactive_anon:16224kB active_file:28664kB inactive_file:44520kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:244032kB dirty:1428kB writeback:0kB shmem:16956kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 563200kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no Node 1 active_anon:0kB inactive_anon:0kB active_file:144kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:0kB dirty:0kB writeback:0kB shmem:0kB shmem_thp: 0kB shmem_pmdmapped: 0kB anon_thp: 0kB writeback_tmp:0kB unstable:0kB all_unreclaimable? no Node 0 DMA free:15908kB min:220kB low:272kB high:324kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:15992kB managed:15908kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 2557 2557 2557 2557 Node 0 DMA32 free:1050484kB min:36272kB low:45340kB high:54408kB active_anon:623600kB inactive_anon:16224kB active_file:28664kB inactive_file:44520kB unevictable:0kB writepending:1428kB present:3129332kB managed:2621192kB mlocked:0kB kernel_stack:7872kB pagetables:5632kB bounce:0kB free_pcp:1384kB local_pcp:644kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 0 Normal free:0kB min:4kB low:4kB high:4kB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB present:786432kB managed:332kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 1 Normal free:3783456kB min:53612kB low:67012kB high:80412kB active_anon:0kB inactive_anon:0kB active_file:144kB inactive_file:0kB unevictable:0kB writepending:0kB present:3932160kB managed:3870192kB mlocked:0kB kernel_stack:0kB pagetables:0kB bounce:0kB free_pcp:0kB local_pcp:0kB free_cma:0kB lowmem_reserve[]: 0 0 0 0 0 Node 0 DMA: 1*4kB (U) 0*8kB 0*16kB 1*32kB (U) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (U) 1*2048kB (M) 3*4096kB (M) = 15908kB Node 0 DMA32: 5315*4kB (UME) 151*8kB (UME) 28*16kB (UME) 119*32kB (UME) 71*64kB (UME) 46*128kB (UM) 19*256kB (UME) 3*512kB (UME) 1*1024kB (U) 1*2048kB (E) 245*4096kB (M) = 1050148kB Node 0 Normal: 0*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 0kB Node 1 Normal: 60*4kB (UME) 360*8kB (U) 281*16kB (UE) 55*32kB (UME) 18*64kB (UME) 16*128kB (UME) 6*256kB (UME) 2*512kB (UE) 2*1024kB (ME) 3*2048kB (M) 918*4096kB (M) = 3783456kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB Node 1 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=2048kB 22136 total pagecache pages 0 pages in swap cache Swap cache stats: add 0, delete 0, find 0/0 Free swap = 0kB Total swap = 0kB 1965979 pages RAM 0 pages HighMem/MovableOnly 339073 pages reserved 0 pages cma reserved hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected net_ratelimit: 77 callbacks suppressed ip6_tables: ip6tables: counters copy to user failed while replacing table ip6_tables: ip6tables: counters copy to user failed while replacing table ip6_tables: ip6tables: counters copy to user failed while replacing table ip6_tables: ip6tables: counters copy to user failed while replacing table hub 9-0:1.0: USB hub found ip6_tables: ip6tables: counters copy to user failed while replacing table ip6_tables: ip6tables: counters copy to user failed while replacing table hub 9-0:1.0: 8 ports detected ip6_tables: ip6tables: counters copy to user failed while replacing table vivid-000: ================= START STATUS ================= ip6_tables: ip6tables: counters copy to user failed while replacing table vivid-000: Test Pattern: 75% Colorbar vivid-000: Fill Percentage of Frame: 100 ip6_tables: ip6tables: counters copy to user failed while replacing table vivid-000: Horizontal Movement: No Movement ip6_tables: ip6tables: counters copy to user failed while replacing table vivid-000: Vertical Movement: No Movement vivid-000: OSD Text Mode: All vivid-000: Show Border: false hub 9-0:1.0: USB hub found vivid-000: Show Square: hub 9-0:1.0: 8 ports detected false vivid-000: Sensor Flipped Horizontally: false vivid-000: Sensor Flipped Vertically: false vivid-000: Insert SAV Code in Image: false vivid-000: Insert EAV Code in Image: false vivid-000: Reduced Framerate: false vivid-000: Enable Capture Cropping: true vivid-000: Enable Capture Composing: true vivid-000: Enable Capture Scaler: true vivid-000: Timestamp Source: End of Frame vivid-000: Colorspace: sRGB vivid-000: Transfer Function: Default vivid-000: Y'CbCr Encoding: Default vivid-000: HSV Encoding: Hue 0-179 vivid-000: Quantization: Default vivid-000: Apply Alpha To Red Only: false vivid-000: Standard Aspect Ratio: 4x3 vivid-000: DV Timings Signal Mode: Current DV Timings vivid-000: DV Timings: 640x480p59 inactive vivid-000: DV Timings Aspect Ratio: Source Width x Height vivid-000: Maximum EDID Blocks: 2 vivid-000: Limited RGB Range (16-235): false vivid-000: Rx RGB Quantization Range: Automatic tpg source WxH: 640x360 (Y'CbCr) tpg field: 1 tpg crop: 640x360@0x0 tpg compose: 640x360@0x0 tpg colorspace: 8 tpg transfer function: 0/0 tpg Y'CbCr encoding: 0/0 tpg HSV encoding: 128/0 tpg quantization: 0/0 tpg RGB range: 0/2 vivid-000: ================== END STATUS ================== hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected IPVS: set_ctl: invalid protocol: 15 172.20.20.59:20003 IPVS: set_ctl: invalid protocol: 15 172.20.20.59:20003 EXT4-fs (loop5): VFS: Can't find ext4 filesystem print_req_error: I/O error, dev loop5, sector 0 buffer_io_error: 170 callbacks suppressed Buffer I/O error on dev loop5, logical block 0, async page read print_req_error: I/O error, dev loop5, sector 4 Buffer I/O error on dev loop5, logical block 2, async page read print_req_error: I/O error, dev loop5, sector 6 Buffer I/O error on dev loop5, logical block 3, async page read IPv6 header not found IPv6 header not found QAT: Invalid ioctl QAT: Invalid ioctl x_tables: ip6_tables: mh match: only valid for protocol 135 x_tables: ip6_tables: mh match: only valid for protocol 135 IPv6 header not found IPv6 header not found hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected IPv6 header not found hub 9-0:1.0: USB hub found IPv6 header not found hub 9-0:1.0: 8 ports detected IPv6 header not found CIFS VFS: Malformed UNC in devname. dlm: dev_write no op 0 0 dlm: dev_write no op 0 0 x_tables: ip6_tables: esp match: only valid for protocol 50 CIFS VFS: Malformed UNC in devname. hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected IPv6 header not found IPv6 header not found hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected x_tables: ip6_tables: socket match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected x_tables: ip6_tables: socket match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT IPv6 header not found Cannot find add_set index 2 as target Cannot find add_set index 2 as target IPv6 header not found x_tables: ip6_tables: socket match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT IPv6 header not found x_tables: ip6_tables: socket match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT IPv6 header not found x_tables: ip6_tables: socket match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT hub 9-0:1.0: USB hub found IPv6 header not found hub 9-0:1.0: 8 ports detected x_tables: ip6_tables: socket match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT syz-executor.4 uses obsolete (PF_INET,SOCK_PACKET) hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected IPv6 header not found x_tables: ip6_tables: socket match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT IPv6 header not found hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected x_tables: ip6_tables: socket match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT IPv6 header not found x_tables: ip6_tables: socket match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT net_ratelimit: 207 callbacks suppressed ip6_tables: ip6tables: counters copy to user failed while replacing table x_tables: ip6_tables: socket match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT ip6_tables: ip6tables: counters copy to user failed while replacing table hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected ip6_tables: ip6tables: counters copy to user failed while replacing table ip6_tables: ip6tables: counters copy to user failed while replacing table x_tables: ip6_tables: socket match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected ip6_tables: ip6tables: counters copy to user failed while replacing table hub 9-0:1.0: USB hub found ip6_tables: ip6tables: counters copy to user failed while replacing table hub 9-0:1.0: 8 ports detected ip6_tables: ip6tables: counters copy to user failed while replacing table ip6_tables: ip6tables: counters copy to user failed while replacing table hub 9-0:1.0: USB hub found ip6_tables: ip6tables: counters copy to user failed while replacing table hub 9-0:1.0: 8 ports detected ip6_tables: ip6tables: counters copy to user failed while replacing table hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected IPv6 header not found hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected IPv6 header not found hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected Cannot find add_set index 3 as target Cannot find add_set index 3 as target hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found xt_hashlimit: overflow, try lower: 0/0 hub 9-0:1.0: 8 ports detected xt_hashlimit: overflow, try lower: 0/0 IPv6 header not found hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected xt_hashlimit: overflow, try lower: 0/0 hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected base_sock_release(ffff8880827b8980) sk=ffff88805c778280