device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 INFO: task syz-executor0:12892 blocked for more than 140 seconds. b_state=0x00000029, b_size=512 Not tainted 4.19.0-rc7+ #276 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. b_state=0x00000029, b_size=512 syz-executor0 D device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 25400 12892 5856 0x00000004 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 Call Trace: __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 context_switch kernel/sched/core.c:2825 [inline] __schedule+0x86c/0x1ed0 kernel/sched/core.c:3473 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 schedule+0xfe/0x460 kernel/sched/core.c:3517 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __rwsem_down_write_failed_common+0xbb9/0x1670 kernel/locking/rwsem-xadd.c:566 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:595 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 inode_lock include/linux/fs.h:738 [inline] do_truncate+0x1b0/0x2d0 fs/open.c:61 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 vfs_truncate+0x60e/0x840 fs/open.c:109 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 do_sys_truncate+0x156/0x190 fs/open.c:132 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __do_sys_truncate fs/open.c:144 [inline] __se_sys_truncate fs/open.c:142 [inline] __x64_sys_truncate+0x54/0x80 fs/open.c:142 __find_get_block_slow() failed. block=2, b_blocknr=16 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 entry_SYSCALL_64_after_hwframe+0x49/0xbe device loop0 blocksize: 4096 RIP: 0033:0x457579 __find_get_block_slow() failed. block=2, b_blocknr=16 Code: Bad RIP value. b_state=0x00000029, b_size=512 RSP: 002b:00007ff95c8b0c78 EFLAGS: 00000246 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 ORIG_RAX: 000000000000004c b_state=0x00000029, b_size=512 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457579 device loop0 blocksize: 4096 RDX: 0000000000000000 RSI: 0000000000000003 RDI: 00000000200003c0 __find_get_block_slow() failed. block=2, b_blocknr=16 RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000 b_state=0x00000029, b_size=512 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff95c8b16d4 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 R13: 00000000004bde66 R14: 00000000004d8400 R15: 00000000ffffffff b_state=0x00000029, b_size=512 INFO: lockdep is turned off. device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=1, b_blocknr=8 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 NMI backtrace for cpu 1 b_state=0x00000029, b_size=512 CPU: 1 PID: 971 Comm: khungtaskd Not tainted 4.19.0-rc7+ #276 device loop0 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+0x1c4/0x2b4 lib/dump_stack.c:113 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 nmi_cpu_backtrace.cold.3+0x63/0xa2 lib/nmi_backtrace.c:101 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 nmi_trigger_cpumask_backtrace+0x1b3/0x1ed 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 loop0 blocksize: 4096 trigger_all_cpu_backtrace include/linux/nmi.h:144 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:204 [inline] watchdog+0xb3e/0x1050 kernel/hung_task.c:265 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 b_state=0x00000029, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=2, b_blocknr=16 kthread+0x35a/0x420 kernel/kthread.c:246 b_state=0x00000029, b_size=512 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Sending NMI from CPU 1 to CPUs 0: device loop0 blocksize: 4096 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 2.376 msecs NMI backtrace for cpu 0 CPU: 0 PID: 12882 Comm: syz-executor0 Not tainted 4.19.0-rc7+ #276 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:latency_exceeded block/blk-wbt.c:250 [inline] RIP: 0010:wb_timer_fn+0x71e/0x2520 block/blk-wbt.c:356 Code: 5e 41 5f 5d c3 e8 b2 ac f6 fd 48 8b 85 30 fc ff ff 48 8d 78 50 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 fc 1a 00 00 48 8b 85 30 fc ff ff 4c 8b 68 50 48 8d 43 18 48 RSP: 0018:ffff8801dae072f8 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffff8801d2985e80 RCX: ffffffff838824ff RDX: 1ffff1003af8f0ba RSI: ffffffff838828de RDI: ffff8801d7c785d0 RBP: ffff8801dae076f8 R08: ffff88018dc52100 R09: ffffed003af8f0dc R10: ffffed003af8f0dc R11: ffff8801d7c786e3 R12: 0000000000000000 R13: dffffc0000000000 R14: ffff8801d7c785e0 R15: 0000000000000003 FS: 00007ff95c8d2700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001d14ae000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: blk_stat_timer_fn+0x49d/0x680 block/blk-stat.c:97 call_timer_fn+0x272/0x920 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers+0x7e5/0xc70 kernel/time/timer.c:1682 run_timer_softirq+0x52/0xb0 kernel/time/timer.c:1695 __do_softirq+0x30b/0xad8 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1056 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:864 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:788 [inline] RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1684 [inline] RIP: 0010:vprintk_emit+0x824/0x930 kernel/printk/printk.c:1921 Code: 00 00 00 00 fc ff df 41 80 3c 04 00 0f 85 c5 00 00 00 48 83 3d 74 16 cd 07 00 74 2d e8 75 f9 19 00 48 8b bd 90 fe ff ff 57 9d <0f> 1f 44 00 00 e9 68 fe ff ff e8 5d f9 19 00 0f 0b e8 56 f9 19 00 RSP: 0018:ffff8801804fe540 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 1ffff1003009fcae RCX: ffffc90001e74000 RDX: 0000000000040000 RSI: ffffffff8164dc1b RDI: 0000000000000246 RBP: ffff8801804fe6b8 R08: ffff88018dc52100 R09: 0000000000000001 R10: fffffbfff12720c0 R11: 0000000000000000 R12: 1ffffffff1263e51 R13: 0000000000000200 R14: ffff8801804fe690 R15: 0000000000000000 vprintk_default+0x28/0x30 kernel/printk/printk.c:1963 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1996 __find_get_block_slow fs/buffer.c:237 [inline] __find_get_block.cold.57+0xd8/0xff fs/buffer.c:1294 __getblk_slow fs/buffer.c:1039 [inline] __getblk_gfp+0x2b3/0xd50 fs/buffer.c:1320 __bread_gfp+0x2d/0x300 fs/buffer.c:1354 sb_bread include/linux/buffer_head.h:307 [inline] fat_ent_bread+0x173/0x290 fs/fat/fatent.c:107 fat_ent_read_block fs/fat/fatent.c:442 [inline] fat_alloc_clusters+0x8db/0x16f0 fs/fat/fatent.c:490 fat_add_cluster+0x84/0x160 fs/fat/inode.c:101 __fat_get_block fs/fat/inode.c:148 [inline] fat_get_block+0x385/0xb30 fs/fat/inode.c:183 __block_write_begin_int+0x5ef/0x1d90 fs/buffer.c:1966 __block_write_begin fs/buffer.c:2016 [inline] block_write_begin+0xda/0x370 fs/buffer.c:2075 cont_write_begin+0x5ba/0x920 fs/buffer.c:2428 Lost 55 message(s)!