__find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 INFO: task syz-executor0:13672 blocked for more than 140 seconds. device loop0 blocksize: 4096 Not tainted 4.20.0-rc6-next-20181214+ #171 __find_get_block_slow() failed. block=3, b_blocknr=24 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 syz-executor0 D25376 13672 6062 0x00000004 __find_get_block_slow() failed. block=3, b_blocknr=24 Call Trace: b_state=0x00000021, b_size=512 context_switch kernel/sched/core.c:2831 [inline] __schedule+0xa41/0x21e0 kernel/sched/core.c:3472 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 schedule+0xef/0x370 kernel/sched/core.c:3516 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 __rwsem_down_write_failed_common+0xc9a/0x15e0 kernel/locking/rwsem-xadd.c:577 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 device loop0 blocksize: 4096 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 inode_lock include/linux/fs.h:771 [inline] vfs_setxattr+0x96/0x100 fs/xattr.c:218 __find_get_block_slow() failed. block=3, b_blocknr=24 setxattr+0x2ea/0x450 fs/xattr.c:450 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 path_setxattr+0x1e3/0x230 fs/xattr.c:469 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __do_sys_setxattr fs/xattr.c:484 [inline] __se_sys_setxattr fs/xattr.c:480 [inline] __x64_sys_setxattr+0xc4/0x150 fs/xattr.c:480 __find_get_block_slow() failed. block=3, b_blocknr=24 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 entry_SYSCALL_64_after_hwframe+0x49/0xbe device loop0 blocksize: 4096 RIP: 0033:0x457669 Code: Bad RIP value. __find_get_block_slow() failed. block=3, b_blocknr=24 RSP: 002b:00007f7553258c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457669 b_state=0x00000021, b_size=512 RDX: 00000000200001c0 RSI: 0000000020000100 RDI: 00000000200000c0 device loop0 blocksize: 4096 RBP: 000000000072bfa0 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000246 R12: 00007f75532596d4 __find_get_block_slow() failed. block=3, b_blocknr=24 R13: 00000000004cc310 R14: 00000000004d9068 R15: 00000000ffffffff b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 INFO: task syz-executor0:13708 blocked for more than 140 seconds. __find_get_block_slow() failed. block=3, b_blocknr=24 Not tainted 4.20.0-rc6-next-20181214+ #171 b_state=0x00000021, b_size=512 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. device loop0 blocksize: 4096 syz-executor0 D25376 13708 6062 0x00000004 __find_get_block_slow() failed. block=3, b_blocknr=24 Call Trace: b_state=0x00000021, b_size=512 context_switch kernel/sched/core.c:2831 [inline] __schedule+0xa41/0x21e0 kernel/sched/core.c:3472 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 schedule+0xef/0x370 kernel/sched/core.c:3516 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline] rwsem_down_read_failed+0x371/0x710 kernel/locking/rwsem-xadd.c:297 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94 __find_get_block_slow() failed. block=3, b_blocknr=24 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x9b/0x120 kernel/locking/rwsem.c:26 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 inode_lock_shared include/linux/fs.h:781 [inline] do_last fs/namei.c:3323 [inline] path_openat+0x2444/0x5150 fs/namei.c:3534 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 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=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 do_sys_open+0x568/0x780 fs/open.c:1063 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __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 __find_get_block_slow() failed. block=3, b_blocknr=24 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 entry_SYSCALL_64_after_hwframe+0x49/0xbe device loop0 blocksize: 4096 RIP: 0033:0x457669 __find_get_block_slow() failed. block=3, b_blocknr=24 Code: Bad RIP value. b_state=0x00000021, b_size=512 RSP: 002b:00007f7553216c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457669 RDX: 0000000000000002 RSI: 0000000020000200 RDI: 0000000000000004 b_state=0x00000021, b_size=512 RBP: 000000000072c0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f75532176d4 device loop0 blocksize: 4096 R13: 00000000004c3010 R14: 00000000004d55e8 R15: 00000000ffffffff __find_get_block_slow() failed. block=3, b_blocknr=24 INFO: task syz-executor0:13711 blocked for more than 140 seconds. b_state=0x00000021, b_size=512 Not tainted 4.20.0-rc6-next-20181214+ #171 device loop0 blocksize: 4096 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. __find_get_block_slow() failed. block=3, b_blocknr=24 syz-executor0 D25376 13711 6062 0x00000004 b_state=0x00000021, b_size=512 Call Trace: device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 context_switch kernel/sched/core.c:2831 [inline] __schedule+0xa41/0x21e0 kernel/sched/core.c:3472 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 schedule+0xef/0x370 kernel/sched/core.c:3516 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __rwsem_down_write_failed_common+0xc9a/0x15e0 kernel/locking/rwsem-xadd.c:577 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0xa5/0x130 kernel/locking/rwsem.c:72 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 inode_lock include/linux/fs.h:771 [inline] vfs_setxattr+0x96/0x100 fs/xattr.c:218 b_state=0x00000021, b_size=512 setxattr+0x2ea/0x450 fs/xattr.c:450 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 path_setxattr+0x1e3/0x230 fs/xattr.c:469 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 __do_sys_setxattr fs/xattr.c:484 [inline] __se_sys_setxattr fs/xattr.c:480 [inline] __x64_sys_setxattr+0xc4/0x150 fs/xattr.c:480 device loop0 blocksize: 4096 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 entry_SYSCALL_64_after_hwframe+0x49/0xbe device loop0 blocksize: 4096 RIP: 0033:0x457669 __find_get_block_slow() failed. block=3, b_blocknr=24 Code: Bad RIP value. b_state=0x00000021, b_size=512 RSP: 002b:00007f75531f5c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc device loop0 blocksize: 4096 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457669 __find_get_block_slow() failed. block=3, b_blocknr=24 RDX: 00000000200001c0 RSI: 0000000020000100 RDI: 00000000200000c0 b_state=0x00000021, b_size=512 RBP: 000000000072c180 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000246 R12: 00007f75531f66d4 device loop0 blocksize: 4096 R13: 00000000004cc310 R14: 00000000004d9068 R15: 00000000ffffffff Showing all locks held in the system: __find_get_block_slow() failed. block=3, b_blocknr=24 1 lock held by khungtaskd/1024: b_state=0x00000021, b_size=512 #0: 000000006a9115b1 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379 device loop0 blocksize: 4096 1 lock held by rsyslogd/5934: __find_get_block_slow() failed. block=3, b_blocknr=24 #0: 00000000f5c0dfae (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766 b_state=0x00000021, b_size=512 2 locks held by getty/6024: #0: 00000000dbd4f39a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341 device loop0 blocksize: 4096 #1: 0000000052e98016 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154 syz-executor0(13670): getblk(): executed=9 bh_count=0 bh_state=0 2 locks held by getty/6025: __find_get_block_slow() failed. block=3, b_blocknr=24 #0: 00000000d2f85b47 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341 b_state=0x00000021, b_size=512 #1: 000000001f5eb8f7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154 device loop0 blocksize: 4096 2 locks held by getty/6026: __find_get_block_slow() failed. block=3, b_blocknr=24 #0: 00000000e256eafb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 #1: 00000000defffc3c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154 b_state=0x00000021, b_size=512 2 locks held by getty/6027: device loop0 blocksize: 4096 #0: 000000003432a591 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341 __find_get_block_slow() failed. block=3, b_blocknr=24 #1: 000000007879573c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154 b_state=0x00000021, b_size=512 2 locks held by getty/6028: #0: 00000000a78e7e2e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341 device loop0 blocksize: 4096 #1: 000000001d948fe0 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154 __find_get_block_slow() failed. block=3, b_blocknr=24 2 locks held by getty/6029: b_state=0x00000021, b_size=512 #0: 00000000cc3c1347 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341 device loop0 blocksize: 4096 #1: 00000000a35dbfe5 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154 __find_get_block_slow() failed. block=3, b_blocknr=24 2 locks held by getty/6030: b_state=0x00000021, b_size=512 #0: 00000000f466afe3 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:341 device loop0 blocksize: 4096 #1: 00000000c45406ff (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1ee0 drivers/tty/n_tty.c:2154 __find_get_block_slow() failed. block=3, b_blocknr=24 1 lock held by syz-executor5/8724: b_state=0x00000021, b_size=512 #0: 0000000099eb4e3d (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds+0x53/0x120 fs/exec.c:1407 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 4 locks held by kworker/u4:7/12850: b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 #0: 00000000c14c0ee5 (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1129 [inline] #0: 00000000c14c0ee5 (&rq->lock){-.-.}, at: __schedule+0x236/0x21e0 kernel/sched/core.c:3410 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 #1: 000000006a9115b1 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline] #1: 000000006a9115b1 (rcu_read_lock){....}, at: update_curr+0x383/0xbd0 kernel/sched/fair.c:830 b_state=0x00000021, b_size=512 #2: 000000007448ad29 (&(&wb->work_lock)->rlock){+...}, at: spin_lock_bh include/linux/spinlock.h:334 [inline] #2: 000000007448ad29 (&(&wb->work_lock)->rlock){+...}, at: wb_wakeup_delayed+0x67/0xf0 mm/backing-dev.c:282 device loop0 blocksize: 4096 #3: 000000000391d102 (&base->lock){-.-.}, at: lock_timer_base+0xbb/0x2b0 kernel/time/timer.c:937 __find_get_block_slow() failed. block=3, b_blocknr=24 7 locks held by syz-executor0/13670: b_state=0x00000021, b_size=512 2 locks held by syz-executor0/13672: #0: 0000000069fd9e08 (sb_writers#19){.+.+}, at: sb_start_write include/linux/fs.h:1619 [inline] #0: 0000000069fd9e08 (sb_writers#19){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:359 device loop0 blocksize: 4096 #1: 000000009ebbbf3c (&sb->s_type->i_mutex_key#24){++++}, at: inode_lock include/linux/fs.h:771 [inline] #1: 000000009ebbbf3c (&sb->s_type->i_mutex_key#24){++++}, at: vfs_setxattr+0x96/0x100 fs/xattr.c:218 __find_get_block_slow() failed. block=3, b_blocknr=24 2 locks held by syz-executor0/13708: b_state=0x00000021, b_size=512 #0: 0000000069fd9e08 (sb_writers#19){.+.+}, at: sb_start_write include/linux/fs.h:1619 [inline] #0: 0000000069fd9e08 (sb_writers#19){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:359 device loop0 blocksize: 4096 #1: 000000009ebbbf3c (&sb->s_type->i_mutex_key#24){++++}, at: inode_lock_shared include/linux/fs.h:781 [inline] #1: 000000009ebbbf3c (&sb->s_type->i_mutex_key#24){++++}, at: do_last fs/namei.c:3323 [inline] #1: 000000009ebbbf3c (&sb->s_type->i_mutex_key#24){++++}, at: path_openat+0x2444/0x5150 fs/namei.c:3534 __find_get_block_slow() failed. block=3, b_blocknr=24 2 locks held by syz-executor0/13711: b_state=0x00000021, b_size=512 #0: 0000000069fd9e08 (sb_writers#19){.+.+}, at: sb_start_write include/linux/fs.h:1619 [inline] #0: 0000000069fd9e08 (sb_writers#19){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:359 device loop0 blocksize: 4096 #1: 000000009ebbbf3c (&sb->s_type->i_mutex_key#24){++++}, at: inode_lock include/linux/fs.h:771 [inline] #1: 000000009ebbbf3c (&sb->s_type->i_mutex_key#24){++++}, at: vfs_setxattr+0x96/0x100 fs/xattr.c:218 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 ============================================= b_state=0x00000021, b_size=512 NMI backtrace for cpu 0 device loop0 blocksize: 4096 CPU: 0 PID: 1024 Comm: khungtaskd Not tainted 4.20.0-rc6-next-20181214+ #171 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 __find_get_block_slow() failed. block=3, b_blocknr=24 nmi_cpu_backtrace.cold.2+0x5c/0xa1 lib/nmi_backtrace.c:101 b_state=0x00000021, b_size=512 nmi_trigger_cpumask_backtrace+0x1e8/0x22a lib/nmi_backtrace.c:62 device loop0 blocksize: 4096 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 __find_get_block_slow() failed. block=3, b_blocknr=24 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 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 __find_get_block_slow() failed. block=3, b_blocknr=24 b_state=0x00000021, b_size=512 device loop0 blocksize: 4096 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: __find_get_block_slow() failed. block=3, b_blocknr=24 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.600 msecs NMI backtrace for cpu 1 CPU: 1 PID: 13670 Comm: syz-executor0 Not tainted 4.20.0-rc6-next-20181214+ #171 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1697 [inline] RIP: 0010:vprintk_emit+0x667/0x990 kernel/printk/printk.c:1934 Code: 48 89 85 98 fe ff ff 49 c1 ee 03 48 89 8d b0 fe ff ff 49 01 c6 e8 19 06 1a 00 f3 90 48 c7 c1 e0 81 2c 8b 48 8b 85 98 fe ff ff <49> c1 ec 03 0f b6 11 4c 01 e0 4c 8b a5 b0 fe ff ff c6 00 01 41 88 RSP: 0018:ffff888181eae9b0 EFLAGS: 00000046 RAX: dffffc0000000000 RBX: 1ffff110303d5d3c RCX: ffffffff8b2c81e0 RDX: 0000000000040000 RSI: ffffffff8165fd07 RDI: 0000000000000001 RBP: ffff888181eaeb28 R08: ffff88817abfa140 R09: 0000000000000008 R10: 0000000000004f9b R11: ffff88817abfa140 R12: ffff888181eaea80 R13: 0000000000000001 R14: ffffed10303d5d50 R15: ffff888181eaeb00 FS: 00007f755327a700(0000) GS:ffff8881dad00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f906c0120d8 CR3: 00000001bf40a000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000060000002 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: vprintk_default+0x28/0x30 kernel/printk/printk.c:1962 vprintk_func+0x7e/0x181 kernel/printk/printk_safe.c:398 printk+0xa7/0xcf kernel/printk/printk.c:1995 __find_get_block_slow fs/buffer.c:231 [inline] __find_get_block.cold.58+0x3a/0xff fs/buffer.c:1325 __getblk_slow fs/buffer.c:1058 [inline] __getblk_gfp+0x3d3/0x1030 fs/buffer.c:1351 __bread_gfp+0x2d/0x310 fs/buffer.c:1385 sb_bread include/linux/buffer_head.h:307 [inline] fat__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+0x2464/0x5150 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: 0033:0x457669 Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7553279c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000457669 RDX: 0000000000000002 RSI: 0000000020000200 RDI: 0000000000000004 RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f755327a6d4 R13: 00000000004c3010 R14: 00000000004d55e8 R15: 00000000ffffffff