device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 INFO: task syz-executor3:13033 blocked for more than 140 seconds. b_state=0x00000029, b_size=512 Not tainted 4.20.0-rc1-next-20181109+ #110 device loop5 blocksize: 4096 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor3 D24560 13033 6070 0x00000004 __find_get_block_slow() failed. block=1, b_blocknr=8 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 schedule+0xef/0x370 kernel/sched/core.c:3516 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 wb_wait_for_completion+0x1f9/0x2d0 fs/fs-writeback.c:221 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 sync_inodes_sb+0x33e/0x480 fs/fs-writeback.c:2417 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 sync_inodes_one_sb+0x59/0x70 fs/sync.c:74 device loop5 blocksize: 4096 iterate_supers+0x149/0x290 fs/super.c:724 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 ksys_sync+0xec/0x1e0 fs/sync.c:113 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 kworker/u4:4(2463): getblk(): executed=9 bh_count=0 bh_state=0 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 __ia32_sys_sync+0xe/0x20 fs/sync.c:124 b_state=0x00000029, b_size=512 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 entry_SYSCALL_64_after_hwframe+0x49/0xbe __find_get_block_slow() failed. block=1, b_blocknr=8 RIP: 0033:0x457569 b_state=0x00000029, b_size=512 Code: Bad RIP value. device loop5 blocksize: 4096 RSP: 002b:00007f0f731c1c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 __find_get_block_slow() failed. block=1, b_blocknr=8 RAX: ffffffffffffffda RBX: 000000000072bf08 RCX: 0000000000457569 b_state=0x00000029, b_size=512 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 device loop5 blocksize: 4096 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 __find_get_block_slow() failed. block=1, b_blocknr=8 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0f731c26d4 b_state=0x00000029, b_size=512 R13: 00000000004c3216 R14: 00000000004d8918 R15: 00000000ffffffff device loop5 blocksize: 4096 INFO: task syz-executor3:13038 blocked for more than 140 seconds. __find_get_block_slow() failed. block=1, b_blocknr=8 Not tainted 4.20.0-rc1-next-20181109+ #110 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. b_state=0x00000029, b_size=512 syz-executor3 D24560 13038 6070 0x00000004 device loop5 blocksize: 4096 Call Trace: __find_get_block_slow() failed. block=1, b_blocknr=8 context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 schedule+0xef/0x370 kernel/sched/core.c:3516 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 wb_wait_for_completion+0x1f9/0x2d0 fs/fs-writeback.c:221 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 sync_inodes_sb+0x33e/0x480 fs/fs-writeback.c:2417 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 sync_inodes_one_sb+0x59/0x70 fs/sync.c:74 __find_get_block_slow() failed. block=1, b_blocknr=8 iterate_supers+0x149/0x290 fs/super.c:724 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 ksys_sync+0xec/0x1e0 fs/sync.c:113 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 __ia32_sys_sync+0xe/0x20 fs/sync.c:124 device loop5 blocksize: 4096 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 entry_SYSCALL_64_after_hwframe+0x49/0xbe __find_get_block_slow() failed. block=1, b_blocknr=8 RIP: 0033:0x457569 b_state=0x00000029, b_size=512 Code: Bad RIP value. device loop5 blocksize: 4096 RSP: 002b:00007f0f731a0c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 __find_get_block_slow() failed. block=1, b_blocknr=8 RAX: ffffffffffffffda RBX: 000000000072bfa8 RCX: 0000000000457569 b_state=0x00000029, b_size=512 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 device loop5 blocksize: 4096 RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 __find_get_block_slow() failed. block=1, b_blocknr=8 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0f731a16d4 b_state=0x00000029, b_size=512 R13: 00000000004c3216 R14: 00000000004d8918 R15: 00000000ffffffff device loop5 blocksize: 4096 Showing all locks held in the system: __find_get_block_slow() failed. block=1, b_blocknr=8 1 lock held by khungtaskd/1010: b_state=0x00000029, b_size=512 #0: 000000000ccc2fc2 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379 device loop5 blocksize: 4096 7 locks held by kworker/u4:4/2463: __find_get_block_slow() failed. block=1, b_blocknr=8 1 lock held by rsyslogd/5880: b_state=0x00000029, b_size=512 #0: 000000001343f5fb (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 device loop5 blocksize: 4096 2 locks held by getty/5971: __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 00000000e4b6a9f0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 b_state=0x00000029, b_size=512 #1: 00000000acde43e6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 device loop5 blocksize: 4096 2 locks held by getty/5972: __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 000000008eb0dda8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 b_state=0x00000029, b_size=512 #1: 000000008e8abbc3 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 device loop5 blocksize: 4096 2 locks held by getty/5973: __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 0000000047136c0c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 #1: 000000008960db77 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=512 2 locks held by getty/5974: device loop5 blocksize: 4096 #0: 0000000032d3b83c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 __find_get_block_slow() failed. block=1, b_blocknr=8 #1: 000000000d56b920 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 2 locks held by getty/5975: b_state=0x00000029, b_size=512 #0: 00000000cee41f76 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 #1: 00000000efc13054 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 2 locks held by getty/5976: __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 000000003c571515 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 b_state=0x00000029, b_size=512 #1: 0000000054376819 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 device loop5 blocksize: 4096 2 locks held by getty/5977: __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 00000000a5e06e34 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 b_state=0x00000029, b_size=512 #1: 000000009b17c20e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 device loop5 blocksize: 4096 1 lock held by syz-executor3/13033: __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 00000000394a82d2 (&fc->fs_type->s_umount_key#67){.+.+}, at: iterate_supers+0xe2/0x290 fs/super.c:722 b_state=0x00000029, b_size=512 1 lock held by syz-executor3/13038: device loop5 blocksize: 4096 #0: 00000000394a82d2 (&fc->fs_type->s_umount_key#67){.+.+}, at: iterate_supers+0xe2/0x290 fs/super.c:722 __find_get_block_slow() failed. block=1, b_blocknr=8 ============================================= b_state=0x00000029, b_size=512 NMI backtrace for cpu 0 CPU: 0 PID: 1010 Comm: khungtaskd Not tainted 4.20.0-rc1-next-20181109+ #110 device loop5 blocksize: 4096 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __find_get_block_slow() failed. block=1, b_blocknr=8 __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 b_state=0x00000029, b_size=512 nmi_cpu_backtrace.cold.2+0x5c/0xa1 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1e8/0x22a lib/nmi_backtrace.c:62 device loop5 blocksize: 4096 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:205 [inline] watchdog+0xb4c/0x1060 kernel/hung_task.c:289 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 kthread+0x35a/0x440 kernel/kthread.c:246 device loop5 blocksize: 4096 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 __find_get_block_slow() failed. block=1, b_blocknr=8 Sending NMI from CPU 0 to CPUs 1: b_state=0x00000029, b_size=512 NMI backtrace for cpu 1 CPU: 1 PID: 2463 Comm: kworker/u4:4 Not tainted 4.20.0-rc1-next-20181109+ #110 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.837 msecs Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: writeback wb_workfn (flush-7:5) RIP: 0010:lockdep_copy_map include/linux/lockdep.h:163 [inline] RIP: 0010:call_timer_fn+0x17f/0x920 kernel/time/timer.c:1316 Code: 0f 95 c1 0f 9e c0 84 c1 0f 85 6b 07 00 00 48 8b 43 28 49 89 45 a0 48 8b 43 30 49 89 45 a8 48 8b 43 38 49 89 45 b0 48 8b 43 40 <49> 89 45 b8 49 8d 45 a0 48 8d 78 08 48 89 85 50 fe ff ff 48 b8 00 RSP: 0018:ffff8801daf077a8 EFLAGS: 00000246 RAX: ffffffff88c8f480 RBX: ffff880188582240 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 1ffff100310b0401 RDI: ffff880188582268 RBP: ffff8801daf07968 R08: ffff8801cf139018 R09: 0000000000000002 R10: 0000000000000000 R11: ffff8801cf138700 R12: 0000000000000102 R13: ffff8801daf07940 R14: dffffc0000000000 R15: ffffffff86fe5580 FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001b55c0000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e0/0xc60 kernel/time/timer.c:1682 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x308/0xb7e kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1061 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:761 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1688 [inline] RIP: 0010:vprintk_emit+0x87d/0x990 kernel/printk/printk.c:1921 Code: 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 de 00 00 00 48 83 3d 73 69 ec 07 00 74 34 e8 6c 16 1a 00 48 8b bd 90 fe ff ff 57 9d <0f> 1f 44 00 00 e9 aa fe ff ff e8 54 16 1a 00 0f 0b e8 4d 16 1a 00 RSP: 0018:ffff8801cf145f50 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801cf138700 RBX: 1ffff10039e28bf0 RCX: 1ffff10039e27203 RDX: 0000000000000000 RSI: ffffffff81659244 RDI: 0000000000000293 RBP: ffff8801cf1460c8 R08: ffff8801cf139018 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801cf138700 R12: 0000000000000200 R13: 0000000000000000 R14: ffffed0039e28c04 R15: ffff8801cf1460a0 vprintk_default+0x28/0x30 kernel/printk/printk.c:1964 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1997 __find_get_block_slow fs/buffer.c:235 [inline] __find_get_block.cold.58+0x85/0xff fs/buffer.c:1325 __getblk_slow fs/buffer.c:1058 [inline] __getblk_gfp+0x3d3/0x1030 fs/buffer.c:1351 __bread_gfp+0x2d/0x310 fs/buffer.c:1385 sb_bread include/linux/buffer_head.h:307 [inline] __fat_write_inode+0x347/0xb60 fs/fat/inode.c:860 fat_write_inode+0x97/0x180 fs/fat/inode.c:909 write_inode fs/fs-writeback.c:1176 [inline] __writeback_single_inode+0xf4a/0x1650 fs/fs-writeback.c:1375 writeback_sb_inodes+0x71f/0x1210 fs/fs-writeback.c:1580 __writeback_inodes_wb+0x1b9/0x340 fs/fs-writeback.c:1649 wb_writeback+0xa5d/0xfa0 fs/fs-writeback.c:1758 wb_check_old_data_flush fs/fs-writeback.c:1860 [inline] wb_do_writeback fs/fs-writeback.c:1913 [inline] wb_workfn+0xffe/0x1780 fs/fs-writeback.c:1942 process_one_work+0xc8b/0x1c40 kernel/workqueue.c:2153 Lost 39 message(s)!