b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 INFO: task syz-executor4:8502 blocked for more than 140 seconds. Not tainted 4.19.0-rc8-next-20181019+ #98 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 syz-executor4 D22040 8502 5662 0x00000004 Call Trace: __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3480 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 schedule+0xfe/0x460 kernel/sched/core.c:3524 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 wb_wait_for_completion+0x1f9/0x2d0 fs/fs-writeback.c:221 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 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 loop1 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 sync_inodes_one_sb+0x59/0x70 fs/sync.c:74 iterate_supers+0x149/0x290 fs/super.c:724 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 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 loop1 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 __ia32_sys_sync+0xe/0x20 fs/sync.c:124 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 entry_SYSCALL_64_after_hwframe+0x49/0xbe __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 RIP: 0033:0x457569 device loop1 blocksize: 4096 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 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 RSP: 002b:00007ff7a60c5c78 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 device loop1 blocksize: 4096 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 __find_get_block_slow() failed. block=1, b_blocknr=8 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff7a60c66d4 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 R13: 00000000004c2eae R14: 00000000004d7ad0 R15: 00000000ffffffff __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 Showing all locks held in the system: 3 locks held by kworker/u4:3/262: __find_get_block_slow() failed. block=1, b_blocknr=8 1 lock held by khungtaskd/982: b_state=0x00000029, b_size=512 #0: 0000000056a41601 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379 device loop1 blocksize: 4096 1 lock held by rsyslogd/5425: __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 000000005ddf8f97 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 2 locks held by getty/5514: b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 #0: 0000000020098749 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 000000003a06dd4e (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/5515: __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 000000004452ad5c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 #1: 000000005a202279 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/5516: __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 00000000466805b0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 #1: 00000000b579d898 (&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/5517: device loop1 blocksize: 4096 #0: 0000000080e5f7a9 (&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: 0000000029baa989 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 2 locks held by getty/5518: #0: 000000003d4e6a62 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000a53f21e5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 2 locks held by getty/5519: device loop1 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 #0: 0000000019584128 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000081c2511b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/5520: __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 #0: 00000000e94283df (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 device loop1 blocksize: 4096 #1: 00000000eaa06a37 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 __find_get_block_slow() failed. block=1, b_blocknr=8 1 lock held by syz-executor5/1548: b_state=0x00000029, b_size=512 1 lock held by syz-executor5/4484: device loop1 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 1 lock held by syz-executor4/8502: device loop1 blocksize: 4096 #0: 0000000062e57e63 (&fc->fs_type->s_umount_key#83){++++}, 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 device loop1 blocksize: 4096 1 lock held by syz-executor4/8505: #0: 0000000062e57e63 (&fc->fs_type->s_umount_key#83){++++}, 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 device loop1 blocksize: 4096 CPU: 0 PID: 982 Comm: khungtaskd Not tainted 4.19.0-rc8-next-20181019+ #98 __find_get_block_slow() failed. block=1, b_blocknr=8 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 b_state=0x00000029, b_size=512 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x244/0x39d lib/dump_stack.c:113 device loop1 blocksize: 4096 nmi_cpu_backtrace.cold.2+0x5c/0xa1 lib/nmi_backtrace.c:101 __find_get_block_slow() failed. block=1, b_blocknr=8 nmi_trigger_cpumask_backtrace+0x1e8/0x22a lib/nmi_backtrace.c:62 b_state=0x00000029, b_size=512 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 device loop1 blocksize: 4096 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb39/0x1050 kernel/hung_task.c:265 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop1 blocksize: 4096 kthread+0x35a/0x440 kernel/kthread.c:246 __find_get_block_slow() failed. block=1, b_blocknr=8 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 b_state=0x00000029, b_size=512 Sending NMI from CPU 0 to CPUs 1: device loop1 blocksize: 4096 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.122 msecs NMI backtrace for cpu 1 CPU: 1 PID: 262 Comm: kworker/u4:3 Not tainted 4.19.0-rc8-next-20181019+ #98 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: writeback wb_workfn (flush-7:1) RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:2237 [inline] RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:2264 [inline] RIP: 0010:validate_chain kernel/locking/lockdep.c:2318 [inline] RIP: 0010:__lock_acquire+0xd8d/0x4c20 kernel/locking/lockdep.c:3341 Code: 66 41 f7 47 20 ff 1f 0f 84 ac 08 00 00 48 b8 eb 83 b5 80 46 86 c8 61 49 0f af c6 48 c1 e8 31 49 89 c2 48 8d 04 c5 00 03 9b 8a <48> 89 c2 48 89 44 24 58 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 RSP: 0018:ffff8801daf074a0 EFLAGS: 00000002 RAX: ffffffff8a9b38e0 RBX: 00000000a4a734f9 RCX: ffff8801d8d34940 RDX: 1ffff1003b1a6940 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff8801daf07828 R08: ffff8801d8d34a00 R09: 0000000000000008 R10: 00000000000006bc R11: ffff8801d8d340c0 R12: 0000000000000020 R13: 000000007911626b R14: 17cc08f31db89764 R15: ffff8801d8d349e0 FS: 0000000000000000(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001d317d000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3844 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:128 [inline] _raw_spin_lock_irq+0x61/0x80 kernel/locking/spinlock.c:160 __run_timers+0x168/0xc60 kernel/time/timer.c:1658 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 e3 9e cc 07 00 74 34 e8 fc d5 19 00 48 8b bd 90 fe ff ff 57 9d <0f> 1f 44 00 00 e9 aa fe ff ff e8 e4 d5 19 00 0f 0b e8 dd d5 19 00 RSP: 0018:ffff8801d8d4df30 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8801d8d340c0 RBX: 1ffff1003b1a9bec RCX: 1ffff1003b1a693b RDX: 0000000000000000 RSI: ffffffff81655dd4 RDI: 0000000000000293 RBP: ffff8801d8d4e0a8 R08: ffff8801d8d349d8 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801d8d340c0 R12: 0000000000000200 R13: 0000000000000000 R14: ffffed003b1a9c00 R15: ffff8801d8d4e080 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:237 [inline] __find_get_block.cold.58+0xd8/0xff 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+0xa64/0xfb0 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 ? debug_smp_processor_id Lost 50 message(s)!