b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 INFO: task syz-executor0:13414 blocked for more than 140 seconds. __find_get_block_slow() failed. block=2, b_blocknr=16 Not tainted 4.20.0-rc5+ #148 b_state=0x00000021, b_size=512 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. device loop0 blocksize: 4096 syz-executor0 D14104 13414 1 0x00000004 __find_get_block_slow() failed. block=2, b_blocknr=16 Call Trace: b_state=0x00000021, b_size=512 context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 schedule+0xfe/0x460 kernel/sched/core.c:3516 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3574 __find_get_block_slow() failed. block=2, b_blocknr=16 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xaff/0x16f0 kernel/locking/mutex.c:1072 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 vfat_lookup+0xf1/0x640 fs/fat/namei_vfat.c:709 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 __lookup_slow+0x2b5/0x540 fs/namei.c:1671 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 lookup_slow+0x57/0x80 fs/namei.c:1688 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 walk_component+0x92b/0x2590 fs/namei.c:1810 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 link_path_walk.part.40+0xa61/0x1530 fs/namei.c:2141 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 link_path_walk fs/namei.c:2072 [inline] path_openat+0x270/0x5150 fs/namei.c:3533 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 do_filp_open+0x255/0x380 fs/namei.c:3564 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 do_sys_open+0x568/0x700 fs/open.c:1063 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 __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 b_state=0x00000021, b_size=512 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 entry_SYSCALL_64_after_hwframe+0x49/0xbe b_state=0x00000021, b_size=512 RIP: 0033:0x455660 device loop0 blocksize: 4096 Code: Bad RIP value. __find_get_block_slow() failed. block=2, b_blocknr=16 RSP: 002b:00007ffc294942b0 EFLAGS: 00000202 ORIG_RAX: 0000000000000002 b_state=0x00000021, b_size=512 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000455660 device loop0 blocksize: 4096 RDX: 0000000000000000 RSI: 0000000000090800 RDI: 00000000004bc3ae __find_get_block_slow() failed. block=2, b_blocknr=16 RBP: 0000000000000387 R08: 0000000000000001 R09: 0000000001c33940 b_state=0x00000021, b_size=512 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000 device loop0 blocksize: 4096 R13: 000000000007f320 R14: 00000000000000d0 R15: 0000000000000000 __find_get_block_slow() failed. block=2, b_blocknr=16 Showing all locks held in the system: b_state=0x00000021, b_size=512 1 lock held by khungtaskd/1019: device loop0 blocksize: 4096 #0: 00000000d7bf8b12 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379 __find_get_block_slow() failed. block=2, b_blocknr=16 3 locks held by rs:main Q:Reg/5914: b_state=0x00000021, b_size=512 #0: 00000000cc1789f4 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 #1: 0000000068b82ae2 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2810 [inline] #1: 0000000068b82ae2 (sb_writers#3){.+.+}, at: vfs_write+0x42a/0x560 fs/read_write.c:548 #2: 00000000ea340fbf (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1124 [inline] #2: 00000000ea340fbf (&rq->lock){-.-.}, at: __schedule+0x236/0x21d0 kernel/sched/core.c:3410 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 1 lock held by rsyslogd/5916: __find_get_block_slow() failed. block=2, b_blocknr=16 #0: 00000000848780cd (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 b_state=0x00000021, b_size=512 2 locks held by getty/6007: device loop0 blocksize: 4096 #0: 00000000044495b9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 __find_get_block_slow() failed. block=2, b_blocknr=16 #1: 00000000f7b6dae4 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6008: b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 #0: 00000000ad003035 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 b_state=0x00000021, b_size=512 #1: 00000000d698fe32 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 2 locks held by getty/6009: #0: 00000000c8c837af (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000087fadb36 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6010: #0: 0000000029f608d0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 00000000dc1ff848 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 b_state=0x00000021, b_size=512 2 locks held by getty/6011: device loop0 blocksize: 4096 #0: 00000000f8117fa4 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 __find_get_block_slow() failed. block=2, b_blocknr=16 #1: 00000000898db434 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 b_state=0x00000021, b_size=512 2 locks held by getty/6012: device loop0 blocksize: 4096 #0: 000000003c913987 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 __find_get_block_slow() failed. block=2, b_blocknr=16 #1: 0000000038656735 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by getty/6013: b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 #0: 00000000d20ea200 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 __find_get_block_slow() failed. block=2, b_blocknr=16 #1: 0000000077b9c222 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 2 locks held by syz-executor0/13414: #0: 00000000b2193d16 (&sb->s_type->i_mutex_key#28){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline] #0: 00000000b2193d16 (&sb->s_type->i_mutex_key#28){++++}, at: lookup_slow+0x49/0x80 fs/namei.c:1687 b_state=0x00000021, b_size=512 #1: 00000000a6534058 (&sbi->s_lock){+.+.}, at: vfat_lookup+0xf1/0x640 fs/fat/namei_vfat.c:709 device loop0 blocksize: 4096 6 locks held by syz-executor0/19940: __find_get_block_slow() failed. block=2, b_blocknr=16 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1019 Comm: khungtaskd Not tainted 4.20.0-rc5+ #148 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 b_state=0x00000021, 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 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 device loop0 blocksize: 4096 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 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000021, b_size=512 kthread+0x35a/0x440 kernel/kthread.c:246 device loop0 blocksize: 4096 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: __find_get_block_slow() failed. block=2, b_blocknr=16 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.724 msecs NMI backtrace for cpu 0 CPU: 0 PID: 19940 Comm: syz-executor0 Not tainted 4.20.0-rc5+ #148 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:detach_buf+0x291/0x5d0 drivers/virtio/virtio_ring.c:651 Code: 0e 8b 45 c0 48 89 f2 41 89 47 5c 48 c1 ea 03 48 b8 00 00 00 00 00 fc ff df 0f b6 14 02 48 89 f0 83 e0 07 83 c0 03 38 d0 7c 08 <84> d2 0f 85 ef 02 00 00 41 83 47 2c 01 49 8d 7f 5a 48 b8 00 00 00 RSP: 0018:ffff8881dae07618 EFLAGS: 00000002 RAX: 0000000000000007 RBX: ffff8881d0bc3410 RCX: ffffffff83cfb380 RDX: 0000000000000000 RSI: ffff8881d048016c RDI: ffff8881d0bc341e RBP: ffff8881dae07688 R08: ffff8881b89b2540 R09: ffffed103b5c0edd R10: ffffed103b5c0edd R11: 0000000000000003 R12: 00000000000001ac R13: ffff8881d0bc3410 R14: ffff8881d0bc3410 R15: ffff8881d0480140 FS: 0000000001c33940(0000) GS:ffff8881dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 0000000181de0000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: virtqueue_get_buf_ctx+0x34e/0x820 drivers/virtio/virtio_ring.c:737 virtqueue_get_buf+0x1f/0x30 drivers/virtio/virtio_ring.c:758 virtscsi_vq_done+0xdb/0x180 drivers/scsi/virtio_scsi.c:222 virtscsi_req_done+0xa7/0xd0 drivers/scsi/virtio_scsi.c:238 vring_interrupt+0x128/0x170 drivers/virtio/virtio_ring.c:950 __handle_irq_event_percpu+0x195/0xb30 kernel/irq/handle.c:149 handle_irq_event_percpu+0xa0/0x1d0 kernel/irq/handle.c:189 handle_irq_event+0xa7/0x135 kernel/irq/handle.c:206 handle_edge_irq+0x227/0x880 kernel/irq/chip.c:791 generic_handle_irq_desc include/linux/irqdesc.h:154 [inline] handle_irq+0x252/0x3d8 arch/x86/kernel/irq_64.c:78 do_IRQ+0x98/0x1c0 arch/x86/kernel/irq.c:246 common_interrupt+0xf/0xf arch/x86/entry/entry_64.S:582 RIP: 0010:arch_local_irq_enable arch/x86/include/asm/paravirt.h:771 [inline] RIP: 0010:__do_softirq+0x2c3/0xb7e kernel/softirq.c:276 Code: c7 c0 00 01 52 89 48 c1 e8 03 42 80 3c 38 00 0f 85 f0 07 00 00 48 83 3d 4a fe 51 01 00 0f 84 24 07 00 00 fb 66 0f 1f 44 00 00 <48> c7 85 60 fe ff ff 00 91 40 89 b8 ff ff ff ff 0f bc 85 74 fe ff RSP: 0018:ffff8881dae07c90 EFLAGS: 00000286 ORIG_RAX: ffffffffffffffda RAX: 1ffffffff12a4020 RBX: ffff8881b89b2540 RCX: 1ffff110371365c6 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8881b89b2dbc RBP: ffff8881dae07e70 R08: ffff8881b89b2e30 R09: 0000000000000002 R10: 0000000000000000 R11: ffff8881b89b2540 R12: 1ffff1103b5c0fd4 R13: ffff8881dae07fc0 R14: 0000000000000000 R15: dffffc0000000000 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 33 44 ec 07 00 74 34 e8 ac c7 19 00 48 8b bd 90 fe ff ff 57 9d <0f> 1f 44 00 00 e9 aa fe ff ff e8 94 c7 19 00 0f 0b e8 8d c7 19 00 RSP: 0018:ffff88818b5c65f0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8881b89b2540 RBX: 1ffff110316b8cc4 RCX: 1ffff110371365c6 RDX: 0000000000000000 RSI: ffffffff8165bcc4 RDI: 0000000000000293 RBP: ffff88818b5c6768 R08: ffff8881b89b2e30 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8881b89b2540 R12: 0000000000000200 R13: 0000000000000000 R14: ffffed10316b8cd8 R15: ffff88818b5c6740 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:231 [inline] __find_get_block.cold.57+0x3a/0xff fs/buffer.c:1294 __getblk_slow fs/buffer.c:1039 [inline] __getblk_gfp+0x2b3/0xd50 fs/buffer.c:1320 __bread_gfp+0x2d/0x310 fs/buffer.c:1354 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_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+0x1b9/0x Lost 17 message(s)!