__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 INFO: task syz-executor5:11112 blocked for more than 140 seconds. device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 Not tainted 4.20.0-rc7-next-20181224 #189 b_state=0x00000029, b_size=512 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. 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 syz-executor5 D24872 11112 8062 0x00000004 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 Call Trace: 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 context_switch kernel/sched/core.c:2831 [inline] __schedule+0x9de/0x1ed0 kernel/sched/core.c:3472 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 __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 __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 schedule+0xef/0x370 kernel/sched/core.c:3516 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 d_wait_lookup fs/dcache.c:2408 [inline] d_alloc_parallel+0x1471/0x1f40 fs/dcache.c:2490 __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 __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 __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 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 lookup_open+0x560/0x1b90 fs/namei.c:3147 __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 do_last fs/namei.c:3324 [inline] path_openat+0x252a/0x5160 fs/namei.c:3534 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 __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 __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 do_filp_open+0x255/0x380 fs/namei.c:3564 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 do_sys_open+0x568/0x780 fs/open.c:1063 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 __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 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 __find_get_block_slow() failed. block=1, b_blocknr=8 entry_SYSCALL_64_after_hwframe+0x49/0xbe b_state=0x00000029, b_size=512 RIP: 0033:0x4579b9 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 Code: Bad RIP value. b_state=0x00000029, b_size=512 RSP: 002b:00007f0fbf3ccc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 device loop5 blocksize: 4096 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00000000004579b9 __find_get_block_slow() failed. block=1, b_blocknr=8 RDX: 0000000000000002 RSI: 0000000020000200 RDI: 0000000000000004 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 RBP: 000000000073bfa0 R08: 0000000000000000 R09: 0000000000000000 b_state=0x00000029, b_size=512 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0fbf3cd6d4 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 R13: 00000000004c38f8 R14: 00000000004d6690 R15: 00000000ffffffff b_state=0x00000029, b_size=512 Showing all locks held in the system: device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 1 lock held by khungtaskd/1035: b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 00000000e78ddfad (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4389 b_state=0x00000029, b_size=512 1 lock held by rsyslogd/7842: device loop5 blocksize: 4096 2 locks held by getty/7931: __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 00000000cdd82ff5 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 #1: 00000000bfbefa6b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=512 2 locks held by getty/7932: device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 0000000059eb0078 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341 b_state=0x00000029, b_size=512 #1: 00000000845d2d87 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 2 locks held by getty/7933: b_state=0x00000029, b_size=512 #0: 000000005e42f3a9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 #1: 00000000d260034b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=512 2 locks held by getty/7934: device loop5 blocksize: 4096 #0: 0000000016ffa7c2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341 __find_get_block_slow() failed. block=1, b_blocknr=8 #1: 00000000c09733d7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=512 2 locks held by getty/7935: device loop5 blocksize: 4096 #0: 00000000e9cc68a6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341 __find_get_block_slow() failed. block=1, b_blocknr=8 #1: 000000007373a02f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=512 2 locks held by getty/7936: device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 0000000074038f2c (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341 b_state=0x00000029, b_size=512 #1: 0000000076e0b3f5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 2 locks held by getty/7937: b_state=0x00000029, b_size=512 #0: 0000000040186896 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341 device loop5 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 #1: 0000000095917505 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=512 6 locks held by syz-executor5/11110: device loop5 blocksize: 4096 syz-executor5(11110): getblk(): executed=9 bh_count=0 bh_state=0 1 lock held by syz-executor5/11112: __find_get_block_slow() failed. block=1, b_blocknr=8 #0: 00000000d9758435 (&sb->s_type->i_mutex_key#21){++++}, at: inode_lock_shared include/linux/fs.h:779 [inline] #0: 00000000d9758435 (&sb->s_type->i_mutex_key#21){++++}, at: do_last fs/namei.c:3323 [inline] #0: 00000000d9758435 (&sb->s_type->i_mutex_key#21){++++}, at: path_openat+0x250a/0x5160 fs/namei.c:3534 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 NMI backtrace for cpu 0 b_state=0x00000029, b_size=512 CPU: 0 PID: 1035 Comm: khungtaskd Not tainted 4.20.0-rc7-next-20181224 #189 device loop5 blocksize: 4096 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+0x1d3/0x2c6 lib/dump_stack.c:113 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop5 blocksize: 4096 nmi_cpu_backtrace.cold.4+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1c2/0x22c lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 __find_get_block_slow() failed. block=1, b_blocknr=8 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0xba1/0x11a0 kernel/hung_task.c:287 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 kthread+0x35a/0x440 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 0 to CPUs 1: b_state=0x00000029, b_size=512 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.656 msecs NMI backtrace for cpu 1 CPU: 1 PID: 11110 Comm: syz-executor5 Not tainted 4.20.0-rc7-next-20181224 #189 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_dynticks_curr_cpu_in_eqs+0x20/0x170 kernel/rcu/tree.c:302 Code: ff 5d c3 0f 1f 80 00 00 00 00 55 48 89 e5 41 56 49 be 00 00 00 00 00 fc ff df 41 55 4c 8d 6d e0 41 54 49 c7 c4 c0 db 02 00 53 <48> 8d 5d 80 48 c1 eb 03 48 83 ec 68 48 c7 45 80 b3 8a b5 41 4a 8d RSP: 0018:ffff8880ae707458 EFLAGS: 00000006 RAX: 0000000000000001 RBX: ffffffff8a38b738 RCX: 0000000000000002 RDX: 0000000000000000 RSI: ffffffff8152faf1 RDI: ffff88809812ea7c RBP: ffff8880ae707478 R08: ffff88809812e200 R09: fffffbfff169a1f1 R10: fffffbfff169a1f1 R11: ffffffff8b4d0f8b R12: 000000000002dbc0 R13: ffff8880ae707458 R14: dffffc0000000000 R15: 0000000000000000 FS: 00007f0fbf3ee700(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c42b3e7308 CR3: 000000008cc9f000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_is_watching+0x10/0x30 kernel/rcu/tree.c:932 rcu_read_lock_sched_held+0x8d/0x120 kernel/rcu/update.c:112 unbound_pwq_by_node+0x166/0x250 kernel/workqueue.c:563 __queue_work+0xa05/0x1440 kernel/workqueue.c:1394 delayed_work_timer_fn+0x5d/0x90 kernel/workqueue.c:1500 call_timer_fn+0x272/0x920 kernel/time/timer.c:1325 expire_timers kernel/time/timer.c:1358 [inline] __run_timers+0x723/0xc70 kernel/time/timer.c:1681 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1694 __do_softirq+0x30c/0xb2e 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:1062 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1744 [inline] RIP: 0010:vprintk_emit+0x881/0x990 kernel/printk/printk.c:1977 Code: 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 ef 00 00 00 48 83 3d af 32 0a 08 00 74 2d e8 d8 da 19 00 48 8b bd 90 fe ff ff 57 9d <0f> 1f 44 00 00 e9 a3 fe ff ff e8 c0 da 19 00 0f 0b e8 b9 da 19 00 RSP: 0018:ffff88805d1a69b0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 1ffff1100ba34d3c RCX: ffffc9000fe37000 RDX: 0000000000040000 RSI: ffffffff81681788 RDI: 0000000000000246 RBP: ffff88805d1a6b28 R08: ffff88809812eaf0 R09: 0000000000000006 R10: 0000000000000000 R11: ffff88809812e200 R12: 0000000000000200 R13: 0000000000000000 R14: ffffed100ba34d50 R15: ffff88805d1a6b00 vprintk_default+0x28/0x30 kernel/printk/printk.c:2005 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:2038 __find_get_block_slow fs/buffer.c:235 [inline] __find_get_block.cold.57+0x85/0xff fs/buffer.c:1325 __getblk_slow fs/buffer.c:1058 [inline] __getblk_gfp+0x3d3/0x1030 fs/buffer.c:1351 __bread_gfp+0x2d/0x300 fs/buffer.c:1385 sb_bread include/linux/buffer_head.h:307 [inline] fat__get_entry+0x5a6/0xa40 fs/fat/dir.c:101 fat_get_entry fs/fat/dir.c:129 [inline] fat_search_long+0x33b/0x1570 fs/fat/dir.c:479 vfat_find+0x16d/0x1a0 fs/fat/namei_vfat.c:697 vfat_lookup+0x107/0x640 fs/fat/namei_vfat.c:711 lookup_open+0x72e/0x1b90 fs/namei.c:3213 do_last fs/namei.c:3324 [inline] path_openat+0x252a/0x5160 fs/namei.c:3534 do_filp_open+0x255/0x380 fs/namei.c:3564 do_sys_open+0x568/0x780 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: 0033:0x4579b9 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 Lost 7 message(s)!