INFO: task syz-executor295:7582 blocked for more than 140 seconds. Not tainted 5.0.0-rc6-next-20190215 #36 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor295 D28064 7582 7580 0x00000000 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3620 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:367 fuse_lookup+0x8e/0x350 fs/fuse/dir.c:335 __lookup_slow+0x27e/0x500 fs/namei.c:1669 lookup_slow+0x58/0x80 fs/namei.c:1686 walk_component+0x74b/0x2000 fs/namei.c:1808 link_path_walk.part.0+0x980/0x1340 fs/namei.c:2139 link_path_walk fs/namei.c:2070 [inline] path_openat+0x202/0x46e0 fs/namei.c:3532 do_filp_open+0x1a1/0x280 fs/namei.c:3563 do_sys_open+0x3fe/0x5d0 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+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x444910 Code: Bad RIP value. RSP: 002b:00007ffc6a7035d0 EFLAGS: 00000202 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000444910 RDX: 0000000000000000 RSI: 0000000000090800 RDI: 00000000004ae75e RBP: 0000000000001db9 R08: 0000000000001d9e R09: 00000000019ff880 R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffc6a703800 R13: 0000000000407360 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor295:7610 blocked for more than 140 seconds. Not tainted 5.0.0-rc6-next-20190215 #36 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor295 D28176 7610 7582 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3620 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0x726/0x1310 kernel/locking/mutex.c:1072 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:367 fuse_lookup+0x8e/0x350 fs/fuse/dir.c:335 __lookup_slow+0x27e/0x500 fs/namei.c:1669 lookup_slow+0x58/0x80 fs/namei.c:1686 walk_component+0x74b/0x2000 fs/namei.c:1808 link_path_walk.part.0+0x980/0x1340 fs/namei.c:2139 link_path_walk fs/namei.c:2070 [inline] path_openat+0x202/0x46e0 fs/namei.c:3532 do_filp_open+0x1a1/0x280 fs/namei.c:3563 do_sys_open+0x3fe/0x5d0 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+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x446519 Code: Bad RIP value. RSP: 002b:00007f2ba34efdb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00000000006dbc28 RCX: 0000000000446519 RDX: 0000000000000002 RSI: 00000000200002c0 RDI: ffffffffffffff9c RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c R13: 00007ffc6a70376f R14: 00007f2ba34f09c0 R15: 20c49ba5e353f7cf INFO: task syz-executor295:7613 blocked for more than 140 seconds. Not tainted 5.0.0-rc6-next-20190215 #36 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor295 D27944 7613 7582 0x00000004 Call Trace: context_switch kernel/sched/core.c:2877 [inline] __schedule+0x817/0x1cc0 kernel/sched/core.c:3518 schedule+0x92/0x180 kernel/sched/core.c:3562 d_wait_lookup fs/dcache.c:2436 [inline] d_alloc_parallel+0x11cc/0x1bc0 fs/dcache.c:2518 __lookup_slow+0x1ab/0x500 fs/namei.c:1652 lookup_slow+0x58/0x80 fs/namei.c:1686 walk_component+0x74b/0x2000 fs/namei.c:1808 link_path_walk.part.0+0x980/0x1340 fs/namei.c:2139 link_path_walk fs/namei.c:2070 [inline] path_openat+0x202/0x46e0 fs/namei.c:3532 do_filp_open+0x1a1/0x280 fs/namei.c:3563 do_sys_open+0x3fe/0x5d0 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+0x103/0x610 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x446519 Code: Bad RIP value. RSP: 002b:00007f2ba34addb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00000000006dbc48 RCX: 0000000000446519 RDX: 0000000000000002 RSI: 00000000200002c0 RDI: ffffffffffffff9c RBP: 00000000006dbc40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc4c R13: 00007ffc6a70376f R14: 00007f2ba34ae9c0 R15: 20c49ba5e353f7cf Showing all locks held in the system: 2 locks held by init/1: #0: 0000000091d74dd6 (&type->i_mutex_dir_key#6){++++}, at: inode_lock_shared include/linux/fs.h:773 [inline] #0: 0000000091d74dd6 (&type->i_mutex_dir_key#6){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1685 #1: 0000000071c69d9c (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:367 1 lock held by khungtaskd/1041: #0: 000000008bf46afc (rcu_read_lock){....}, at: debug_show_all_locks+0x5f/0x27e kernel/locking/lockdep.c:4382 1 lock held by rsyslogd/7467: #0: 000000003cde5b4e (&f->f_pos_lock){+.+.}, at: __fdget_pos+0xee/0x110 fs/file.c:801 2 locks held by cron/7507: #0: 0000000091d74dd6 (&type->i_mutex_dir_key#6){++++}, at: inode_lock_shared include/linux/fs.h:773 [inline] #0: 0000000091d74dd6 (&type->i_mutex_dir_key#6){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1685 #1: 0000000071c69d9c (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:367 2 locks held by getty/7557: #0: 0000000097251136 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000587fe815 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7558: #0: 000000008ee8fc18 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000ac5d350f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7559: #0: 00000000ed67a12d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000f7815014 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7560: #0: 000000009338420e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 000000000b319607 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7561: #0: 000000006d026e86 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000a75c04a8 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7562: #0: 00000000ed701322 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000023d9928 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by getty/7563: #0: 0000000028bfd701 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341 #1: 00000000c5a34606 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x232/0x1b70 drivers/tty/n_tty.c:2156 2 locks held by syz-executor295/7582: #0: 0000000091d74dd6 (&type->i_mutex_dir_key#6){++++}, at: inode_lock_shared include/linux/fs.h:773 [inline] #0: 0000000091d74dd6 (&type->i_mutex_dir_key#6){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1685 #1: 0000000071c69d9c (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:367 2 locks held by syz-executor295/7610: #0: 0000000091d74dd6 (&type->i_mutex_dir_key#6){++++}, at: inode_lock_shared include/linux/fs.h:773 [inline] #0: 0000000091d74dd6 (&type->i_mutex_dir_key#6){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1685 #1: 0000000071c69d9c (&fi->mutex){+.+.}, at: fuse_lock_inode+0xba/0xf0 fs/fuse/inode.c:367 1 lock held by syz-executor295/7613: #0: 0000000091d74dd6 (&type->i_mutex_dir_key#6){++++}, at: inode_lock_shared include/linux/fs.h:773 [inline] #0: 0000000091d74dd6 (&type->i_mutex_dir_key#6){++++}, at: lookup_slow+0x4a/0x80 fs/namei.c:1685 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1041 Comm: khungtaskd Not tainted 5.0.0-rc6-next-20190215 #36 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 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:204 [inline] watchdog+0x9b2/0xeb0 kernel/hung_task.c:288 kthread+0x357/0x430 kernel/kthread.c:253 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: