usb usb1: usbfs: process 7340 (syz-executor2) did not claim interface 0 before use usb usb1: usbfs: process 7340 (syz-executor2) did not claim interface 0 before use INFO: task syz-executor4:7359 blocked for more than 140 seconds. Not tainted 4.19.0-rc7+ #280 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor4 D23624 7359 5408 0x00000004 Call Trace: context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 schedule+0xfe/0x460 kernel/sched/core.c:3517 d_wait_lookup fs/dcache.c:2428 [inline] d_alloc_parallel+0x1474/0x1f40 fs/dcache.c:2510 lookup_open+0x560/0x1b90 fs/namei.c:3147 do_last fs/namei.c:3324 [inline] path_openat+0x252d/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 __do_sys_open fs/open.c:1081 [inline] __se_sys_open fs/open.c:1076 [inline] __x64_sys_open+0x7e/0xc0 fs/open.c:1076 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457569 Code: 83 c4 18 c3 e8 d8 64 00 00 48 8b 04 24 48 8b 4c 24 08 48 89 01 e8 d7 2d fc ff e8 22 7a fc ff b8 02 00 00 00 48 8d 0d 6a 60 09 <01> 87 01 8b 05 62 60 09 01 83 f8 01 0f 85 8a 00 00 00 b8 01 00 00 RSP: 002b:00007f253e930c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 RDX: 0000000000000000 RSI: 0000000000000600 RDI: 0000000020000180 RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f253e9316d4 R13: 00000000004ef97f R14: 00000000004d3fd8 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/979: #0: 000000009df32268 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4435 1 lock held by rsyslogd/5179: #0: 00000000866250db (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 2 locks held by getty/5269: #0: 000000006465b248 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000002aa41bd5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5270: #0: 00000000129f98a6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000082dc753b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5271: #0: 00000000a7216ff0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000006dbb0e04 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5272: #0: 000000005116a172 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000003517d2b1 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5273: #0: 00000000e5dc94e3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000004017c597 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5274: #0: 000000005a4360a3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000326a650c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by getty/5275: #0: 00000000537665a4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000082d176e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ce0 drivers/tty/n_tty.c:2140 2 locks held by syz-executor4/7298: #0: 000000001cc0ecdd (sb_writers#14){.+.+}, at: sb_start_write include/linux/fs.h:1566 [inline] #0: 000000001cc0ecdd (sb_writers#14){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 #1: 000000004fa5e63e (&sb->s_type->i_mutex_key#21){.+.+}, at: inode_lock_shared include/linux/fs.h:748 [inline] #1: 000000004fa5e63e (&sb->s_type->i_mutex_key#21){.+.+}, at: do_last fs/namei.c:3323 [inline] #1: 000000004fa5e63e (&sb->s_type->i_mutex_key#21){.+.+}, at: path_openat+0x250d/0x5160 fs/namei.c:3534 2 locks held by syz-executor4/7359: #0: 000000001cc0ecdd (sb_writers#14){.+.+}, at: sb_start_write include/linux/fs.h:1566 [inline] #0: 000000001cc0ecdd (sb_writers#14){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360 #1: 000000004fa5e63e (&sb->s_type->i_mutex_key#21){.+.+}, at: inode_lock_shared include/linux/fs.h:748 [inline] #1: 000000004fa5e63e (&sb->s_type->i_mutex_key#21){.+.+}, at: do_last fs/namei.c:3323 [inline] #1: 000000004fa5e63e (&sb->s_type->i_mutex_key#21){.+.+}, at: path_openat+0x250d/0x5160 fs/namei.c:3534 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 979 Comm: khungtaskd Not tainted 4.19.0-rc7+ #280 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113 nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1b3/0x1ed lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb3e/0x1050 kernel/hung_task.c:265 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.19.0-rc7+ #280 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_nmi_enter+0xab/0x1e0 kernel/rcu/tree.c:941 Code: 3c 22 00 0f 85 11 01 00 00 48 03 1c c5 e0 9e 00 89 48 b8 00 00 00 00 00 fc ff df 4c 8d 73 08 4c 89 f1 48 c1 e9 03 80 3c 01 00 <0f> 85 dd 00 00 00 48 83 7b 08 00 0f 88 be 00 00 00 e8 2f 92 ff ff RSP: 0018:ffff8801dae07c20 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: ffff8801dae23980 RCX: 1ffff1003b5c4731 RDX: 1ffffffff12013dc RSI: ffffffff838d55a8 RDI: ffffffff89009ee0 RBP: ffff8801dae07cb0 R08: ffffffff89276e40 R09: ffffed003b5c5979 R10: ffffed003b5c5979 R11: ffff8801dae2cbcb R12: dffffc0000000000 R13: 1ffff1003b5c0f85 R14: ffff8801dae23988 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001bffb7000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_irq_enter+0xce/0x100 kernel/rcu/tree.c:992 irq_enter+0xa/0xe0 kernel/softirq.c:346 scheduler_ipi+0x3d0/0xad0 kernel/sched/core.c:1770 smp_reschedule_interrupt+0x109/0x650 arch/x86/kernel/smp.c:278 reschedule_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:888 RIP: 0010:native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:57 Code: e9 2c ff ff ff 48 89 c7 48 89 45 d8 e8 b3 e0 11 fa 48 8b 45 d8 e9 ca fe ff ff 48 89 df e8 a2 e0 11 fa eb 82 55 48 89 e5 fb f4 <5d> c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 f4 5d c3 90 90 90 90 90 RSP: 0018:ffffffff89207bb8 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff02 RAX: dffffc0000000000 RBX: 1ffffffff1240f7b RCX: 0000000000000000 RDX: 1ffffffff1263e54 RSI: 0000000000000001 RDI: ffffffff8931f2a0 RBP: ffffffff89207bb8 R08: ffffffff89276e40 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff89207c78 R13: ffffffff89f3be20 R14: 0000000000000000 R15: 0000000000000000 arch_safe_halt arch/x86/include/asm/paravirt.h:94 [inline] default_idle+0xbf/0x490 arch/x86/kernel/process.c:498 arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:489 default_idle_call+0x6d/0x90 kernel/sched/idle.c:93 cpuidle_idle_call kernel/sched/idle.c:153 [inline] do_idle+0x3db/0x5b0 kernel/sched/idle.c:262 cpu_startup_entry+0x10c/0x120 kernel/sched/idle.c:368 rest_init+0xe2/0xe5 init/main.c:442 start_kernel+0x8f4/0x92f init/main.c:739 x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470 x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:451 secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243