ip6_tunnel: ip6gre1 xmit: Local address not yet configured! ip6_tunnel: ip6gre2 xmit: Local address not yet configured! ip6_tunnel: ip6gre1 xmit: Local address not yet configured! ip6_tunnel: ip6gre1 xmit: Local address not yet configured! ip6_tunnel: ip6gre2 xmit: Local address not yet configured! INFO: task syz-executor0:6273 blocked for more than 140 seconds. Not tainted 4.20.0-rc7+ #158 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D18528 6273 1 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xaff/0x16f0 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 vfat_lookup+0xf1/0x640 fs/fat/namei_vfat.c:709 __lookup_slow+0x2b5/0x540 fs/namei.c:1671 lookup_slow+0x57/0x80 fs/namei.c:1688 walk_component+0x92b/0x2590 fs/namei.c:1810 link_path_walk.part.40+0xa61/0x1530 fs/namei.c:2141 link_path_walk fs/namei.c:2072 [inline] path_openat+0x270/0x5150 fs/namei.c:3533 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: 0033:0x455670 Code: 31 c0 e9 45 ff ff ff 0f 1f 00 80 3f 00 0f 84 f7 00 00 00 55 53 b9 02 00 00 00 be 00 08 09 00 89 c8 48 81 ec 98 00 00 00 0f 05 <48> 3d 00 f0 ff ff 48 89 c3 0f 87 e9 00 00 00 85 db 0f 88 2f 01 00 RSP: 002b:00007ffd44de7610 EFLAGS: 00000202 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455670 RDX: 0000000000000000 RSI: 0000000000090800 RDI: 00000000004bc3ae RBP: 000000000000057d R08: 0000000000000001 R09: 00000000014a3940 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000009 R13: 000000000008ed9e R14: 0000000000000161 R15: 0000000000000000 INFO: task syz-executor0:16927 blocked for more than 140 seconds. Not tainted 4.20.0-rc7+ #158 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor0 D22768 16927 6273 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 schedule+0xfe/0x460 kernel/sched/core.c:3516 d_wait_lookup fs/dcache.c:2408 [inline] d_alloc_parallel+0x1478/0x1f40 fs/dcache.c:2490 __lookup_slow+0x1e6/0x540 fs/namei.c:1654 lookup_slow+0x57/0x80 fs/namei.c:1688 walk_component+0x92b/0x2590 fs/namei.c:1810 link_path_walk.part.40+0xa61/0x1530 fs/namei.c:2141 link_path_walk fs/namei.c:2072 [inline] path_openat+0x270/0x5150 fs/namei.c:3533 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x700 fs/open.c:1063 __do_sys_openat fs/open.c:1090 [inline] __se_sys_openat fs/open.c:1084 [inline] __x64_sys_openat+0x9d/0x100 fs/open.c:1084 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457669 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007fc2e9282c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457669 RDX: 0000000000000400 RSI: 0000000020000680 RDI: ffffffffffffff9c RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc2e92836d4 R13: 00000000004c32e9 R14: 00000000004d5aa8 R15: 00000000ffffffff Showing all locks held in the system: 1 lock held by khungtaskd/1021: #0: 0000000078915801 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379 1 lock held by rsyslogd/6109: #0: 000000006cca7a99 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 2 locks held by getty/6232: #0: 0000000035c9d345 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000078122e8e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6233: #0: 000000009f15b1bc (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000007716a31f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6234: #0: 00000000f91988f9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000001882eaea (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6235: #0: 00000000364a044b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000a82ee58b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6236: #0: 00000000234dbf15 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000004736e72c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6237: #0: 000000003ab533c9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000e8aae529 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6238: #0: 000000001940e06c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000009d099d1d (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by syz-executor0/6273: #0: 000000002e141f1d (&sb->s_type->i_mutex_key#27){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline] #0: 000000002e141f1d (&sb->s_type->i_mutex_key#27){++++}, at: lookup_slow+0x49/0x80 fs/namei.c:1687 #1: 00000000fbaf1b5c (&sbi->s_lock){+.+.}, at: vfat_lookup+0xf1/0x640 fs/fat/namei_vfat.c:709 1 lock held by syz-executor1/8785: 1 lock held by syz-executor1/8828: 1 lock held by syz-executor0/12910: #0: 00000000865cabe6 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds+0x53/0x120 fs/exec.c:1404 1 lock held by syz-executor0/12942: #0: 000000009ab155a1 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds+0x53/0x120 fs/exec.c:1404 3 locks held by syz-executor0/16923: 1 lock held by syz-executor0/16927: #0: 000000002e141f1d (&sb->s_type->i_mutex_key#27){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline] #0: 000000002e141f1d (&sb->s_type->i_mutex_key#27){++++}, at: lookup_slow+0x49/0x80 fs/namei.c:1687 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1021 Comm: khungtaskd Not tainted 4.20.0-rc7+ #158 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+0x244/0x39d lib/dump_stack.c:113 nmi_cpu_backtrace.cold.2+0x5c/0xa1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1e8/0x22a 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:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:205 [inline] watchdog+0xb51/0x1060 kernel/hung_task.c:289 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8769 Comm: syz-executor4 Not tainted 4.20.0-rc7+ #158 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lockdep_hardirqs_on+0x247/0x5b0 kernel/locking/lockdep.c:2810 Code: 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 fa 01 00 00 83 7c 08 00 00 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 65 48 RSP: 0018:ffff88817e6d7590 EFLAGS: 00000046 RAX: 0000000000000007 RBX: ffff888181524640 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8185ad04 RDI: ffff888181524ebc RBP: ffff88817e6d75a0 R08: ffff888181524640 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87db3e37 R13: 0000000000000000 R14: ffffffff87db3e37 R15: ffff88817e6d7828 FS: 00007f5fae583700(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001c0a79000 CR4: 00000000001426f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: trace_hardirqs_on+0xbd/0x310 kernel/trace/trace_preemptirq.c:30 __raw_read_unlock_irq include/linux/rwlock_api_smp.h:243 [inline] _raw_read_unlock_irq+0x27/0x80 kernel/locking/spinlock.c:264 __snd_pcm_stream_unlock_mode+0x125/0x150 sound/core/pcm_native.c:145 snd_pcm_stream_unlock_irq sound/core/pcm_native.c:202 [inline] snd_pcm_delay+0x234/0x380 sound/core/pcm_native.c:2698 snd_pcm_kernel_ioctl+0x1e0/0x220 sound/core/pcm_native.c:2998 snd_pcm_oss_capture_position_fixup+0x1a1/0x250 sound/core/oss/pcm_oss.c:1202 snd_pcm_oss_read3+0x181/0x410 sound/core/oss/pcm_oss.c:1271 io_capture_transfer+0x27d/0x310 sound/core/oss/io.c:73 snd_pcm_plug_read_transfer+0x1d7/0x3b0 sound/core/oss/pcm_plugin.c:651 snd_pcm_oss_read2+0x221/0x450 sound/core/oss/pcm_oss.c:1474 snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1512 [inline] snd_pcm_oss_read+0x4e4/0x830 sound/core/oss/pcm_oss.c:2752 __vfs_read+0x117/0x9b0 fs/read_write.c:416 vfs_read+0x17f/0x3c0 fs/read_write.c:452 ksys_read+0x101/0x260 fs/read_write.c:578 __do_sys_read fs/read_write.c:588 [inline] __se_sys_read fs/read_write.c:586 [inline] __x64_sys_read+0x73/0xb0 fs/read_write.c:586 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x457669 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f5fae582c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457669 RDX: 0000000000000008 RSI: 0000000020000280 RDI: 0000000000000009 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5fae5836d4 R13: 00000000004c3b17 R14: 00000000004d66a8 R15: 00000000ffffffff