device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 INFO: task syz-executor0:18946 blocked for more than 140 seconds. b_state=0x00000029, b_size=4096 Not tainted 4.19.0-rc8-next-20181019+ #98 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 syz-executor0 D23400 18946 5594 0x00000004 b_state=0x00000029, b_size=4096 Call Trace: device loop0 blocksize: 512 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=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 schedule+0xfe/0x460 kernel/sched/core.c:3524 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3582 b_state=0x00000029, b_size=4096 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xaff/0x16f0 kernel/locking/mutex.c:1072 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 blkdev_put+0x34/0x540 fs/block_dev.c:1816 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 blkdev_close+0x8b/0xb0 fs/block_dev.c:1865 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 __fput+0x3bc/0xa70 fs/file_table.c:279 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 ____fput+0x15/0x20 fs/file_table.c:312 device loop0 blocksize: 512 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop+0x318/0x380 arch/x86/entry/common.c:166 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x411021 Code: 4c 89 f6 48 89 c7 48 89 ca 48 89 4c 24 10 4c 89 54 24 08 e8 b1 a3 ff ff 48 8b 4c 24 10 41 c6 04 0f 00 4c 8b 7c 24 28 4c 8b 54 <24> 08 45 0f b6 37 e9 db fc ff ff 0f 1f 40 00 41 80 f8 29 74 7f ba RSP: 002b:00007fff252568e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 0000000000411021 RDX: 0000000000000000 RSI: ffffffff87bc0edb RDI: 0000000000000004 RBP: 0000000000000000 R08: ffffffff8139dba3 R09: 00000000298028c1 R10: 00007fff25256810 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 00000000000001d2 R15: 0000000000000000 INFO: task syz-executor4:18959 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. syz-executor4 D24280 18959 5698 0x00000004 Call Trace: context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3480 schedule+0xfe/0x460 kernel/sched/core.c:3524 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline] rwsem_down_read_failed+0x371/0x710 kernel/locking/rwsem-xadd.c:297 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x9b/0x120 kernel/locking/rwsem.c:26 __get_super.part.11+0x207/0x2e0 fs/super.c:789 __get_super include/linux/spinlock.h:329 [inline] get_super+0x2d/0x50 fs/super.c:818 fsync_bdev+0x17/0xc0 fs/block_dev.c:469 invalidate_partition+0x35/0x60 block/genhd.c:1570 drop_partitions.isra.14+0xe1/0x200 block/partition-generic.c:445 rescan_partitions+0x72/0x8e0 block/partition-generic.c:518 __blkdev_reread_part+0x1ad/0x230 block/ioctl.c:173 __find_get_block_slow() failed. block=1, b_blocknr=0 blkdev_reread_part+0x26/0x40 block/ioctl.c:193 b_state=0x00000029, b_size=4096 loop_reread_partitions+0x163/0x190 drivers/block/loop.c:646 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 loop_set_status+0xb95/0x1010 drivers/block/loop.c:1200 b_state=0x00000029, b_size=4096 loop_set_status64+0xaa/0x100 drivers/block/loop.c:1318 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 lo_ioctl+0x90e/0x1d60 drivers/block/loop.c:1434 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 __blkdev_driver_ioctl block/ioctl.c:303 [inline] blkdev_ioctl+0x9ac/0x2010 block/ioctl.c:601 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 block_ioctl+0xee/0x130 fs/block_dev.c:1883 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702 device loop0 blocksize: 512 __do_sys_ioctl fs/ioctl.c:709 [inline] __se_sys_ioctl fs/ioctl.c:707 [inline] __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707 __find_get_block_slow() failed. block=1, b_blocknr=0 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 syz-executor0(18947): getblk(): executed=9 bh_count=0 bh_state=0 entry_SYSCALL_64_after_hwframe+0x49/0xbe __find_get_block_slow() failed. block=1, b_blocknr=0 RIP: 0033:0x457569 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 Code: Bad RIP value. b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 RSP: 002b:00007f99331b0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 __find_get_block_slow() failed. block=1, b_blocknr=0 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 RDX: 0000000020000380 RSI: 0000000000004c04 RDI: 0000000000000003 b_state=0x00000029, b_size=4096 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f99331b16d4 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 R13: 00000000004c0481 R14: 00000000004d0630 R15: 00000000ffffffff b_state=0x00000029, b_size=4096 INFO: task syz-executor3:18960 blocked for more than 140 seconds. device loop0 blocksize: 512 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=0 syz-executor3 D25208 18960 5648 0x00000006 b_state=0x00000029, b_size=4096 Call Trace: device loop0 blocksize: 512 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=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 schedule+0xfe/0x460 kernel/sched/core.c:3524 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3582 __find_get_block_slow() failed. block=1, b_blocknr=0 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xaff/0x16f0 kernel/locking/mutex.c:1072 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 blkdev_put+0x34/0x540 fs/block_dev.c:1816 device loop0 blocksize: 512 blkdev_close+0x8b/0xb0 fs/block_dev.c:1865 __find_get_block_slow() failed. block=1, b_blocknr=0 __fput+0x3bc/0xa70 fs/file_table.c:279 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 ____fput+0x15/0x20 fs/file_table.c:312 device loop0 blocksize: 512 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 get_signal+0x1550/0x1970 kernel/signal.c:2347 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 entry_SYSCALL_64_after_hwframe+0x49/0xbe device loop0 blocksize: 512 RIP: 0033:0x457569 __find_get_block_slow() failed. block=1, b_blocknr=0 Code: Bad RIP value. b_state=0x00000029, b_size=4096 RSP: 002b:00007f9f97b15c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000457569 b_state=0x00000029, b_size=4096 RDX: 0000000000000004 RSI: 0000000000004c00 RDI: 0000000000000003 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 device loop0 blocksize: 512 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9f97b166d4 R13: 00000000004c0378 R14: 00000000004d0510 R15: 00000000ffffffff __find_get_block_slow() failed. block=1, b_blocknr=0 INFO: task syz-executor2:18969 blocked for more than 140 seconds. b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 Not tainted 4.19.0-rc8-next-20181019+ #98 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. b_state=0x00000029, b_size=4096 syz-executor2 D25000 18969 5620 0x00000006 device loop0 blocksize: 512 Call Trace: __find_get_block_slow() failed. block=1, b_blocknr=0 context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3480 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 schedule+0xfe/0x460 kernel/sched/core.c:3524 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3582 b_state=0x00000029, b_size=4096 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xaff/0x16f0 kernel/locking/mutex.c:1072 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 blkdev_put+0x34/0x540 fs/block_dev.c:1816 device loop0 blocksize: 512 blkdev_close+0x8b/0xb0 fs/block_dev.c:1865 __fput+0x3bc/0xa70 fs/file_table.c:279 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 ____fput+0x15/0x20 fs/file_table.c:312 b_state=0x00000029, b_size=4096 task_work_run+0x1e8/0x2a0 kernel/task_work.c:113 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 get_signal+0x1550/0x1970 kernel/signal.c:2347 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath arch/x86/entry/common.c:268 [inline] do_syscall_64+0x6be/0x820 arch/x86/entry/common.c:293 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 entry_SYSCALL_64_after_hwframe+0x49/0xbe b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 RIP: 0033:0x457569 __find_get_block_slow() failed. block=1, b_blocknr=0 Code: Bad RIP value. b_state=0x00000029, b_size=4096 RSP: 002b:00007f9bd560cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 0000000000457569 b_state=0x00000029, b_size=4096 RDX: 0000000000000004 RSI: 0000000000004c06 RDI: 0000000000000003 device loop0 blocksize: 512 RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000 __find_get_block_slow() failed. block=1, b_blocknr=0 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f9bd560d6d4 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 R13: 00000000004c0378 R14: 00000000004d0510 R15: 00000000ffffffff b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 INFO: task syz-executor5:18970 blocked for more than 140 seconds. b_state=0x00000029, b_size=4096 Not tainted 4.19.0-rc8-next-20181019+ #98 device loop0 blocksize: 512 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. __find_get_block_slow() failed. block=1, b_blocknr=0 syz-executor5 D24168 18970 5748 0x00000004 b_state=0x00000029, b_size=4096 Call Trace: device loop0 blocksize: 512 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=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 schedule+0xfe/0x460 kernel/sched/core.c:3524 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3582 __find_get_block_slow() failed. block=1, b_blocknr=0 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xaff/0x16f0 kernel/locking/mutex.c:1072 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __blkdev_get+0x19b/0x13b0 fs/block_dev.c:1466 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 blkdev_get+0xc1/0xb50 fs/block_dev.c:1617 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 blkdev_open+0x1fb/0x280 fs/block_dev.c:1775 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 do_dentry_open+0x499/0x1250 fs/open.c:771 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 vfs_open+0xa0/0xd0 fs/open.c:880 __find_get_block_slow() failed. block=1, b_blocknr=0 do_last fs/namei.c:3418 [inline] path_openat+0x12bc/0x5150 fs/namei.c:3534 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 do_filp_open+0x255/0x380 fs/namei.c:3564 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 do_sys_open+0x568/0x700 fs/open.c:1063 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __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 __find_get_block_slow() failed. block=1, b_blocknr=0 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 entry_SYSCALL_64_after_hwframe+0x49/0xbe device loop0 blocksize: 512 RIP: 0033:0x4111a1 __find_get_block_slow() failed. block=1, b_blocknr=0 Code: 74 3b 44 89 f1 ba 00 33 44 00 44 89 f6 31 ff 31 c0 ff 15 aa 82 24 00 e9 90 fc ff ff c6 02 00 4c 8b 7c 24 28 49 89 ca 49 83 c7 <01> 4c 89 7c 24 28 e9 44 fb ff ff 4d 89 d7 e9 3c fb ff ff b9 40 95 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 RSP: 002b:00007f3148a517a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004111a1 __find_get_block_slow() failed. block=1, b_blocknr=0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007f3148a51850 b_state=0x00000029, b_size=4096 RBP: 000000000072bf00 R08: 000000000000000f R09: 0000000000000000 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 R10: 00007f3148a529d0 R11: 0000000000000293 R12: 00007f3148a526d4 b_state=0x00000029, b_size=4096 R13: 00000000004c4ca7 R14: 00000000004d8070 R15: 00000000ffffffff device loop0 blocksize: 512 INFO: task syz-executor1:18972 blocked for more than 140 seconds. __find_get_block_slow() failed. block=1, b_blocknr=0 Not tainted 4.19.0-rc8-next-20181019+ #98 b_state=0x00000029, b_size=4096 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. device loop0 blocksize: 512 syz-executor1 D22296 18972 5606 0x00000004 __find_get_block_slow() failed. block=1, b_blocknr=0 Call Trace: b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 context_switch kernel/sched/core.c:2831 [inline] __schedule+0x8cf/0x21d0 kernel/sched/core.c:3480 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 schedule+0xfe/0x460 kernel/sched/core.c:3524 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 syz-executor0(18947): getblk(): executed=9 bh_count=0 bh_state=0 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3582 device loop0 blocksize: 512 __mutex_lock_common kernel/locking/mutex.c:1002 [inline] __mutex_lock+0xaff/0x16f0 kernel/locking/mutex.c:1072 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1087 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 __blkdev_get+0x19b/0x13b0 fs/block_dev.c:1466 b_state=0x00000029, b_size=4096 blkdev_get+0xc1/0xb50 fs/block_dev.c:1617 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 blkdev_open+0x1fb/0x280 fs/block_dev.c:1775 device loop0 blocksize: 512 do_dentry_open+0x499/0x1250 fs/open.c:771 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 vfs_open+0xa0/0xd0 fs/open.c:880 b_state=0x00000029, b_size=4096 do_last fs/namei.c:3418 [inline] path_openat+0x12bc/0x5150 fs/namei.c:3534 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 do_filp_open+0x255/0x380 fs/namei.c:3564 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 do_sys_open+0x568/0x700 fs/open.c:1063 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __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 __find_get_block_slow() failed. block=1, b_blocknr=0 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 entry_SYSCALL_64_after_hwframe+0x49/0xbe b_state=0x00000029, b_size=4096 RIP: 0033:0x4111a1 device loop0 blocksize: 512 Code: 74 3b 44 89 f1 ba 00 33 44 00 44 89 f6 31 ff 31 c0 ff 15 aa 82 24 00 e9 90 fc ff ff c6 02 00 4c 8b 7c 24 28 49 89 ca 49 83 c7 <01> 4c 89 7c 24 28 e9 44 fb ff ff 4d 89 d7 e9 3c fb ff ff b9 40 95 RSP: 002b:00007fcc218cc7a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00000000004111a1 __find_get_block_slow() failed. block=1, b_blocknr=0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007fcc218cc850 b_state=0x00000029, b_size=4096 RBP: 000000000072bf00 R08: 000000000000000f R09: 0000000000000000 R10: 00007fcc218cd9d0 R11: 0000000000000293 R12: 00007fcc218cd6d4 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 R13: 00000000004c4ca7 R14: 00000000004d8070 R15: 00000000ffffffff b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 Showing all locks held in the system: __find_get_block_slow() failed. block=1, b_blocknr=0 1 lock held by khungtaskd/983: b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 #0: 00000000e13bf4ae (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379 __find_get_block_slow() failed. block=1, b_blocknr=0 1 lock held by rsyslogd/5463: b_state=0x00000029, b_size=4096 2 locks held by getty/5553: device loop0 blocksize: 512 #0: 00000000ca64bb0b (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 __find_get_block_slow() failed. block=1, b_blocknr=0 #1: 000000006bafe918 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=4096 2 locks held by getty/5554: device loop0 blocksize: 512 #0: 00000000447ffb62 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 #1: 0000000001bb6160 (&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=0 2 locks held by getty/5555: b_state=0x00000029, b_size=4096 #0: 00000000a9889902 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 device loop0 blocksize: 512 #1: 00000000b2801b1d (&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=0 2 locks held by getty/5556: b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 #0: 00000000ea1c12ea (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 #1: 00000000c627ce8d (&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=0 2 locks held by getty/5557: b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 #0: 000000009220c7c6 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 __find_get_block_slow() failed. block=1, b_blocknr=0 #1: 00000000350e92e5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 2 locks held by getty/5558: b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 #0: 00000000a12f3c12 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 #1: 000000001f7071ae (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 2 locks held by getty/5559: __find_get_block_slow() failed. block=1, b_blocknr=0 #0: 00000000e5c2c3b9 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353 b_state=0x00000029, b_size=4096 #1: 000000005ea6b184 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154 device loop0 blocksize: 512 1 lock held by syz-executor0/18946: __find_get_block_slow() failed. block=1, b_blocknr=0 #0: 000000008e35c15b (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x34/0x540 fs/block_dev.c:1816 b_state=0x00000029, b_size=4096 2 locks held by syz-executor0/18947: 3 locks held by syz-executor4/18959: device loop0 blocksize: 512 #0: 0000000043c15da1 (&lo->lo_ctl_mutex/1){+.+.}, at: lo_ioctl+0x8e/0x1d60 drivers/block/loop.c:1404 __find_get_block_slow() failed. block=1, b_blocknr=0 #1: 000000008e35c15b (&bdev->bd_mutex){+.+.}, at: blkdev_reread_part+0x1e/0x40 block/ioctl.c:192 b_state=0x00000029, b_size=4096 #2: 00000000520a4042 (&fc->fs_type->s_umount_key#72){.+.+}, at: __get_super.part.11+0x207/0x2e0 fs/super.c:789 device loop0 blocksize: 512 1 lock held by syz-executor3/18960: #0: 000000008e35c15b (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x34/0x540 fs/block_dev.c:1816 __find_get_block_slow() failed. block=1, b_blocknr=0 1 lock held by syz-executor2/18969: b_state=0x00000029, b_size=4096 #0: 000000008e35c15b (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x34/0x540 fs/block_dev.c:1816 device loop0 blocksize: 512 1 lock held by blkid/18957: #0: 000000008e35c15b (&bdev->bd_mutex){+.+.}, at: blkdev_put+0x34/0x540 fs/block_dev.c:1816 __find_get_block_slow() failed. block=1, b_blocknr=0 1 lock held by syz-executor5/18970: b_state=0x00000029, b_size=4096 #0: 000000008e35c15b (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x13b0 fs/block_dev.c:1466 1 lock held by syz-executor1/18972: device loop0 blocksize: 512 #0: 000000008e35c15b (&bdev->bd_mutex){+.+.}, at: __blkdev_get+0x19b/0x13b0 fs/block_dev.c:1466 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 ============================================= NMI backtrace for cpu 1 device loop0 blocksize: 512 CPU: 1 PID: 983 Comm: khungtaskd Not tainted 4.19.0-rc8-next-20181019+ #98 __find_get_block_slow() failed. block=1, b_blocknr=0 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=0x00000029, b_size=4096 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: 512 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=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 b_state=0x00000029, b_size=4096 device loop0 blocksize: 512 __find_get_block_slow() failed. block=1, b_blocknr=0 kthread+0x35a/0x440 kernel/kthread.c:246 b_state=0x00000029, b_size=4096 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 Sending NMI from CPU 1 to CPUs 0: device loop0 blocksize: 512 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.325 msecs NMI backtrace for cpu 0 CPU: 0 PID: 18947 Comm: syz-executor0 Not tainted 4.19.0-rc8-next-20181019+ #98 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:___preempt_schedule_notrace+0x18/0x31 Code: 52 51 50 41 50 41 51 41 52 41 53 e8 83 8d bd 06 eb 18 55 48 89 e5 57 56 52 51 50 41 50 41 51 41 52 41 53 e8 cb 8d bd 06 eb 00 <41> 5b 41 5a 41 59 41 58 58 59 5a 5e 5f 5d c3 90 90 90 90 90 90 90 RSP: 0018:ffff8801bea6ec80 EFLAGS: 00000086 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff10037df0599 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8801bef82c7c RBP: ffff8801bea6ecc8 R08: ffff8801bef82cc8 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801bef82400 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007ff853480700(0000) GS:ffff8801dae00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffff600400 CR3: 00000001d4803000 CR4: 00000000001406f0 Call Trace: retint_kernel+0x2d/0x2d 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:ffff8801bea6ed80 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 1ffff10037d4ddb6 RCX: ffffc90001e62000 RDX: 0000000000040000 RSI: ffffffff81655dd4 RDI: 0000000000000246 RBP: ffff8801bea6eef8 R08: ffff8801bef82cc8 R09: 0000000000000006 R10: 0000000000000000 R11: ffff8801bef82400 R12: 0000000000000200 R13: 0000000000000000 R14: ffffed0037d4ddca R15: ffff8801bea6eed0 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] read_raw_super_block fs/f2fs/super.c:2737 [inline] f2fs_fill_super+0x440/0x8940 fs/f2fs/super.c:2966 mount_bdev+0x314/0x3e0 fs/super.c:1356 f2fs_mount+0x3c/0x50 fs/f2fs/super.c:3362 legacy_get_tree+0x131/0x460 fs/fs_context.c:718 vfs_get_tree+0x1cb/0x5c0 fs/super.c:1795 do_new_mount fs/namespace.c:2648 [inline] do_mount+0x70c/0x1d90 fs/namespace.c:2974 ksys_mount+0x12d/0x140 fs/namespace.c:3190 __do_sys_mount fs/namespace.c:3204 [inline] __se_sys_mount fs/namespace.c:3201 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3201 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x459fda Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 7d 89 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 5a 89 fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007ff85347fa88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ff85347fb30 RCX: 0000000000459fda RDX: 00007ff85347fad0 RSI: 0000000020000100 RDI: 00007ff85347faf0 RBP: 0000000020000100 R08: 00007ff85347fb30 R09: 00007ff85347fad0 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000003 R13: 0000000000000000 R14: 00000000004d7da0 R15: 00000000ffffffff