syzbot


INFO: task hung in grab_super

Status: auto-closed as invalid on 2019/04/28 15:34
Reported-by: syzbot+9892e8355407599930a2@syzkaller.appspotmail.com
First crash: 2095d, last: 2057d
Similar bugs (9)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 INFO: task hung in grab_super C error 241 571d 1886d 0/1 upstream: reported C repro on 2019/04/19 12:37
android-414 INFO: task hung in grab_super (2) 2 1796d 1818d 0/1 auto-closed as invalid on 2019/11/15 12:55
android-49 INFO: task hung in grab_super 1 2135d 2135d 0/3 auto-closed as invalid on 2019/02/22 13:19
linux-5.15 INFO: task hung in grab_super 1 78d 78d 0/3 upstream: reported on 2024/04/01 06:22
upstream INFO: task hung in grab_super udf C 209 513d 2161d 0/27 closed as dup on 2018/07/18 11:42
linux-6.1 INFO: task hung in grab_super 1 73d 73d 0/3 upstream: reported on 2024/04/06 01:06
linux-4.19 INFO: task hung in grab_super vfs udf C error 249 494d 1888d 0/1 upstream: reported C repro on 2019/04/18 03:33
upstream INFO: task hung in grab_super (2) fs 1 377d 377d 0/27 auto-obsoleted due to no activity on 2023/09/05 02:19
android-49 INFO: task hung in grab_super (2) 1 1763d 1763d 0/3 auto-closed as invalid on 2019/12/19 00:51

Sample crash report:
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
INFO: task syz-executor4:24140 blocked for more than 140 seconds.
b_state=0x00000029, b_size=4096
      Not tainted 4.14.78+ #26
device loop0 blocksize: 2048
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor4   D
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
29504 24140   1854 0x00000004
__find_get_block_slow() failed. block=1, b_blocknr=0
Call Trace:
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 schedule+0x7f/0x1b0 kernel/sched/core.c:3490
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:565 [inline]
 rwsem_down_write_failed+0x390/0x730 kernel/locking/rwsem-xadd.c:594
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:105
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write+0x4f/0x90 kernel/locking/rwsem.c:56
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 grab_super+0x59/0x170 fs/super.c:373
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 sget_userns+0x2ae/0xc30 fs/super.c:504
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 sget+0xcd/0x110 fs/super.c:572
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 mount_bdev+0xde/0x370 fs/super.c:1122
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 mount_fs+0x28f/0x31a fs/super.c:1255
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 vfs_kern_mount.part.9+0xce/0x4a0 fs/namespace.c:1056
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 vfs_kern_mount fs/namespace.c:1038 [inline]
 do_new_mount fs/namespace.c:2561 [inline]
 do_mount+0x404/0x26e0 fs/namespace.c:2891
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 SYSC_mount fs/namespace.c:3107 [inline]
 SyS_mount+0xe5/0x100 fs/namespace.c:3084
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
__find_get_block_slow() failed. block=1, b_blocknr=0
RIP: 0033:0x457569
b_state=0x00000029, b_size=4096
RSP: 002b:00007f3bb3f95c78 EFLAGS: 00000246
device loop0 blocksize: 2048
 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457569
__find_get_block_slow() failed. block=1, b_blocknr=0
RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 00000000200004c0
b_state=0x00000029, b_size=4096
RBP: 000000000072c040 R08: 0000000020000280 R09: 0000000000000000
device loop0 blocksize: 2048
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3bb3f966d4
R13: 00000000004c2af2 R14: 00000000004d4148 R15: 00000000ffffffff
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
INFO: task init:24151 blocked for more than 140 seconds.
__find_get_block_slow() failed. block=1, b_blocknr=0
      Not tainted 4.14.78+ #26
b_state=0x00000029, b_size=4096
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
device loop0 blocksize: 2048
init            D
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
28520 24151      1 0x00000000
device loop0 blocksize: 2048
Call Trace:
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 schedule+0x7f/0x1b0 kernel/sched/core.c:3490
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548
__find_get_block_slow() failed. block=1, b_blocknr=0
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline]
 tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 chrdev_open+0x20d/0x570 fs/char_dev.c:417
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 do_dentry_open+0x426/0xda0 fs/open.c:764
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 vfs_open+0x11c/0x210 fs/open.c:878
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 do_last fs/namei.c:3408 [inline]
 path_openat+0x4eb/0x23a0 fs/namei.c:3550
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 do_filp_open+0x197/0x270 fs/namei.c:3584
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 do_sys_open+0x2ef/0x580 fs/open.c:1071
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
__find_get_block_slow() failed. block=1, b_blocknr=0
RIP: 0033:0x7f6e5692d120
b_state=0x00000029, b_size=4096
RSP: 002b:00007ffc37398078 EFLAGS: 00000246
device loop0 blocksize: 2048
 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000000000242bf40 RCX: 00007f6e5692d120
__find_get_block_slow() failed. block=1, b_blocknr=0
RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8
b_state=0x00000029, b_size=4096
RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001
device loop0 blocksize: 2048
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902
R13: 0000000000000102 R14: 00007ffc373981f0 R15: 000000000242bf48
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
INFO: task init:24152 blocked for more than 140 seconds.
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
      Not tainted 4.14.78+ #26
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
__find_get_block_slow() failed. block=1, b_blocknr=0
init            D
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
28744 24152      1 0x00000000
b_state=0x00000029, b_size=4096
Call Trace:
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 schedule+0x7f/0x1b0 kernel/sched/core.c:3490
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548
__find_get_block_slow() failed. block=1, b_blocknr=0
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline]
 tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 chrdev_open+0x20d/0x570 fs/char_dev.c:417
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 do_dentry_open+0x426/0xda0 fs/open.c:764
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 vfs_open+0x11c/0x210 fs/open.c:878
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 do_last fs/namei.c:3408 [inline]
 path_openat+0x4eb/0x23a0 fs/namei.c:3550
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 do_filp_open+0x197/0x270 fs/namei.c:3584
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 do_sys_open+0x2ef/0x580 fs/open.c:1071
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
__find_get_block_slow() failed. block=1, b_blocknr=0
RIP: 0033:0x7f6e5692d120
b_state=0x00000029, b_size=4096
RSP: 002b:00007ffc37398078 EFLAGS: 00000246
device loop0 blocksize: 2048
 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000000000242c280 RCX: 00007f6e5692d120
__find_get_block_slow() failed. block=1, b_blocknr=0
RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8
b_state=0x00000029, b_size=4096
RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001
device loop0 blocksize: 2048
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902
R13: 0000000000000102 R14: 00007ffc373981f0 R15: 000000000242c288
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
INFO: task init:24154 blocked for more than 140 seconds.
__find_get_block_slow() failed. block=1, b_blocknr=0
      Not tainted 4.14.78+ #26
b_state=0x00000029, b_size=4096
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
init            D
b_state=0x00000029, b_size=4096
29352 24154      1 0x00000000
device loop0 blocksize: 2048
Call Trace:
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 schedule+0x7f/0x1b0 kernel/sched/core.c:3490
__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:3548
device loop0 blocksize: 2048
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline]
 tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 chrdev_open+0x20d/0x570 fs/char_dev.c:417
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 do_dentry_open+0x426/0xda0 fs/open.c:764
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 vfs_open+0x11c/0x210 fs/open.c:878
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 do_last fs/namei.c:3408 [inline]
 path_openat+0x4eb/0x23a0 fs/namei.c:3550
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 do_filp_open+0x197/0x270 fs/namei.c:3584
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 do_sys_open+0x2ef/0x580 fs/open.c:1071
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
__find_get_block_slow() failed. block=1, b_blocknr=0
RIP: 0033:0x7f6e5692d120
b_state=0x00000029, b_size=4096
RSP: 002b:00007ffc37398078 EFLAGS: 00000246
device loop0 blocksize: 2048
 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000000000242c010 RCX: 00007f6e5692d120
__find_get_block_slow() failed. block=1, b_blocknr=0
RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8
b_state=0x00000029, b_size=4096
RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001
device loop0 blocksize: 2048
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902
R13: 0000000000000102 R14: 00007ffc373981f0 R15: 000000000242c018
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
INFO: task init:24155 blocked for more than 140 seconds.
__find_get_block_slow() failed. block=1, b_blocknr=0
      Not tainted 4.14.78+ #26
b_state=0x00000029, b_size=4096
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
device loop0 blocksize: 2048
init            D
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
29352 24155      1 0x00000000
device loop0 blocksize: 2048
Call Trace:
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 schedule+0x7f/0x1b0 kernel/sched/core.c:3490
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548
__find_get_block_slow() failed. block=1, b_blocknr=0
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline]
 tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 chrdev_open+0x20d/0x570 fs/char_dev.c:417
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 do_dentry_open+0x426/0xda0 fs/open.c:764
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 vfs_open+0x11c/0x210 fs/open.c:878
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 do_last fs/namei.c:3408 [inline]
 path_openat+0x4eb/0x23a0 fs/namei.c:3550
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 do_filp_open+0x197/0x270 fs/namei.c:3584
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 do_sys_open+0x2ef/0x580 fs/open.c:1071
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
__find_get_block_slow() failed. block=1, b_blocknr=0
RIP: 0033:0x7f6e5692d120
b_state=0x00000029, b_size=4096
RSP: 002b:00007ffc37398078 EFLAGS: 00000246
device loop0 blocksize: 2048
 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000000000242c0e0 RCX: 00007f6e5692d120
__find_get_block_slow() failed. block=1, b_blocknr=0
RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8
b_state=0x00000029, b_size=4096
RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001
device loop0 blocksize: 2048
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902
R13: 0000000000000102 R14: 00007ffc373981f0 R15: 000000000242c0e8
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
INFO: task init:24156 blocked for more than 140 seconds.
device loop0 blocksize: 2048
      Not tainted 4.14.78+ #26
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
__find_get_block_slow() failed. block=1, b_blocknr=0
init            D
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
29176 24156      1 0x00000000
__find_get_block_slow() failed. block=1, b_blocknr=0
Call Trace:
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 schedule+0x7f/0x1b0 kernel/sched/core.c:3490
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:3548
__find_get_block_slow() failed. block=1, b_blocknr=0
 __mutex_lock_common kernel/locking/mutex.c:833 [inline]
 __mutex_lock+0x521/0x1480 kernel/locking/mutex.c:893
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 tty_open_by_driver drivers/tty/tty_io.c:1927 [inline]
 tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 chrdev_open+0x20d/0x570 fs/char_dev.c:417
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 do_dentry_open+0x426/0xda0 fs/open.c:764
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 vfs_open+0x11c/0x210 fs/open.c:878
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 do_last fs/namei.c:3408 [inline]
 path_openat+0x4eb/0x23a0 fs/namei.c:3550
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 do_filp_open+0x197/0x270 fs/namei.c:3584
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
 do_sys_open+0x2ef/0x580 fs/open.c:1071
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
__find_get_block_slow() failed. block=1, b_blocknr=0
RIP: 0033:0x7f6e5692d120
b_state=0x00000029, b_size=4096
RSP: 002b:00007ffc37398078 EFLAGS: 00000246
device loop0 blocksize: 2048
 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 000000000242c1b0 RCX: 00007f6e5692d120
__find_get_block_slow() failed. block=1, b_blocknr=0
RDX: 0000000000000010 RSI: 0000000000000902 RDI: 00000000004072c8
b_state=0x00000029, b_size=4096
RBP: 0000000000000000 R08: 0000000000407370 R09: 0000000000000001
device loop0 blocksize: 2048
R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000902
R13: 0000000000000102 R14: 00007ffc373981f0 R15: 000000000242c1b8
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0

Showing all locks held in the system:
b_state=0x00000029, b_size=4096
1 lock held by khungtaskd/23:
device loop0 blocksize: 2048
 #0:  (tasklist_lock
__find_get_block_slow() failed. block=1, b_blocknr=0
){.+.+}
b_state=0x00000029, b_size=4096
, at: [<ffffffffa7402047>] debug_show_all_locks+0x74/0x20f kernel/locking/lockdep.c:4541
device loop0 blocksize: 2048
1 lock held by rsyslogd/1636:
 #0: 
__find_get_block_slow() failed. block=1, b_blocknr=0
 (
b_state=0x00000029, b_size=4096
&f->f_pos_lock
device loop0 blocksize: 2048
){+.+.}, at: [<ffffffffa77bd752>] __fdget_pos+0xa2/0xc0 fs/file.c:768
__find_get_block_slow() failed. block=1, b_blocknr=0
2 locks held by getty/1764:
b_state=0x00000029, b_size=4096
 #0: 
device loop0 blocksize: 2048
 (&tty->ldisc_sem){++++}
__find_get_block_slow() failed. block=1, b_blocknr=0
, at: [<ffffffffa7f2f4c0>] tty_ldisc_ref_wait+0x20/0x80 drivers/tty/tty_ldisc.c:275
b_state=0x00000029, b_size=4096
 #1: 
device loop0 blocksize: 2048
 (&ldata->atomic_read_lock){+.+.}
__find_get_block_slow() failed. block=1, b_blocknr=0
, at: [<ffffffffa7f2aa3f>] n_tty_read+0x1ff/0x15e0 drivers/tty/n_tty.c:2142
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
2 locks held by syz-executor4/24140:
b_state=0x00000029, b_size=4096
 #0: 
device loop0 blocksize: 2048
 (&bdev->bd_fsfreeze_mutex){+.+.}
__find_get_block_slow() failed. block=1, b_blocknr=0
, at: [<ffffffffa7762111>] mount_bdev+0x81/0x370 fs/super.c:1116
b_state=0x00000029, b_size=4096
 #1: 
device loop0 blocksize: 2048
 (&type->s_umount_key#47
__find_get_block_slow() failed. block=1, b_blocknr=0
){+.+.}
b_state=0x00000029, b_size=4096
, at: [<ffffffffa7761149>] grab_super+0x59/0x170 fs/super.c:373
device loop0 blocksize: 2048
1 lock held by init/24151:
 #0: 
__find_get_block_slow() failed. block=1, b_blocknr=0
 (
b_state=0x00000029, b_size=4096
tty_mutex
device loop0 blocksize: 2048
){+.+.}, at: [<ffffffffa7f1eeb8>] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline]
){+.+.}, at: [<ffffffffa7f1eeb8>] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011
__find_get_block_slow() failed. block=1, b_blocknr=0
1 lock held by init/24152:
b_state=0x00000029, b_size=4096
 #0: 
device loop0 blocksize: 2048
 (tty_mutex){+.+.}
__find_get_block_slow() failed. block=1, b_blocknr=0
, at: [<ffffffffa7f1eeb8>] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline]
, at: [<ffffffffa7f1eeb8>] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011
b_state=0x00000029, b_size=4096
1 lock held by init/24154:
device loop0 blocksize: 2048
 #0:  (tty_mutex
__find_get_block_slow() failed. block=1, b_blocknr=0
){+.+.}
b_state=0x00000029, b_size=4096
, at: [<ffffffffa7f1eeb8>] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline]
, at: [<ffffffffa7f1eeb8>] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011
device loop0 blocksize: 2048
1 lock held by init/24155:
 #0: 
__find_get_block_slow() failed. block=1, b_blocknr=0
 (
b_state=0x00000029, b_size=4096
tty_mutex
device loop0 blocksize: 2048
){+.+.}, at: [<ffffffffa7f1eeb8>] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline]
){+.+.}, at: [<ffffffffa7f1eeb8>] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011
__find_get_block_slow() failed. block=1, b_blocknr=0
1 lock held by init/24156:
b_state=0x00000029, b_size=4096
 #0: 
device loop0 blocksize: 2048
 (tty_mutex){+.+.}
__find_get_block_slow() failed. block=1, b_blocknr=0
, at: [<ffffffffa7f1eeb8>] tty_open_by_driver drivers/tty/tty_io.c:1927 [inline]
, at: [<ffffffffa7f1eeb8>] tty_open+0x3a8/0x980 drivers/tty/tty_io.c:2011
b_state=0x00000029, b_size=4096

device loop0 blocksize: 2048
=============================================

NMI backtrace for cpu 1
__find_get_block_slow() failed. block=1, b_blocknr=0
CPU: 1 PID: 23 Comm: khungtaskd Not tainted 4.14.78+ #26
b_state=0x00000029, b_size=4096
Call Trace:
device loop0 blocksize: 2048
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xb9/0x11b lib/dump_stack.c:53
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 nmi_cpu_backtrace.cold.0+0x47/0x85 lib/nmi_backtrace.c:101
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 nmi_trigger_cpumask_backtrace+0x121/0x146 lib/nmi_backtrace.c:62
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 trigger_all_cpu_backtrace include/linux/nmi.h:138 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:196 [inline]
 watchdog+0x574/0xa70 kernel/hung_task.c:252
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
 kthread+0x348/0x420 kernel/kthread.c:232
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:402
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
Sending NMI from CPU 1 to CPUs 0:
__find_get_block_slow() failed. block=1, b_blocknr=0
NMI backtrace for cpu 0
CPU: 0 PID: 24093 Comm: syz-executor4 Not tainted 4.14.78+ #26
task: ffff88019d0faf00 task.stack: ffff88018e1b8000
RIP: 0010:_raw_spin_unlock_irqrestore+0x4e/0x70 kernel/locking/spinlock.c:193
RSP: 0018:ffff88018e1bf860 EFLAGS: 00000082
RAX: 0000000080000001 RBX: 00000000ffffffff RCX: 0000000000000000
RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffffffffaabd23a0
RBP: ffffffffa96c69a0 R08: 0000000000000001 R09: 0000000000000000
R10: ffff88019d0fb780 R11: 0000000000000001 R12: ffffffffa741e344
R13: 0000000000000000 R14: ffffffffa90c95a0 R15: ffff88018e1bf950
FS:  00007f3bb3fd8700(0000) GS:ffff8801dba00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f973222e000 CR3: 00000001cb1a6006 CR4: 00000000001606b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 down_trylock+0x46/0x70 kernel/locking/semaphore.c:140
 __down_trylock_console_sem+0x33/0xc0 kernel/printk/printk.c:228
 console_trylock+0x13/0xf0 kernel/printk/printk.c:2074
 vprintk_emit+0x104/0x150 kernel/printk/printk.c:1765
 vprintk_func+0x58/0x159 kernel/printk/printk_safe.c:401
 printk+0xa7/0xcf kernel/printk/printk.c:1838
 __find_get_block_slow fs/buffer.c:239 [inline]
 __find_get_block.cold.22+0x36/0xf5 fs/buffer.c:1356
 __getblk_slow fs/buffer.c:1099 [inline]
 __getblk_gfp+0x186/0x720 fs/buffer.c:1382
 __bread_gfp+0x28/0x1e0 fs/buffer.c:1416
 sb_bread include/linux/buffer_head.h:307 [inline]
 read_raw_super_block fs/f2fs/super.c:2549 [inline]
 f2fs_fill_super+0x287/0x5c60 fs/f2fs/super.c:2769
 mount_bdev+0x2ab/0x370 fs/super.c:1149
 mount_fs+0x28f/0x31a fs/super.c:1255
 vfs_kern_mount.part.9+0xce/0x4a0 fs/namespace.c:1056
 vfs_kern_mount fs/namespace.c:1038 [inline]
 do_new_mount fs/namespace.c:2561 [inline]
 do_mount+0x404/0x26e0 fs/namespace.c:2891
 SYSC_mount fs/namespace.c:3107 [inline]
 SyS_mount+0xe5/0x100 fs/namespace.c:3084
 do_syscall_64+0x19b/0x4b0 arch/x86/entry/common.c:289
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x457569
RSP: 002b:00007f3bb3fd7c78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 0000000000457569
RDX: 0000000020000100 RSI: 00000000200000c0 RDI: 00000000200004c0
RBP: 000000000072bf00 R08: 0000000020000280 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f3bb3fd86d4
R13: 00000000004c2af2 R14: 00000000004d4148 R15: 00000000ffffffff
Code: f6 c7 02 75 27 48 89 df 57 9d 0f 1f 44 00 00 e8 f9 c9 99 fe bf 01 00 00 00 e8 3f 92 90 fe 65 8b 05 58 6f 5c 57 85 c0 74 14 5b 5d <c3> e8 ac 36 9a fe 48 89 df 57 9d 0f 1f 44 00 00 eb d7 e8 84 b2 
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048
__find_get_block_slow() failed. block=1, b_blocknr=0
b_state=0x00000029, b_size=4096
device loop0 blocksize: 2048

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/10/30 15:33 android-4.14 4ed22187defd 8dbb755a .config console log report ci-android-414-kasan-gce-root
2018/10/26 07:29 android-4.14 4ed22187defd a8292de9 .config console log report ci-android-414-kasan-gce-root
2018/09/28 12:15 android-4.14 56aae8ee7423 8bb1f0fc .config console log report ci-android-414-kasan-gce-root
2018/09/23 01:01 android-4.14 666c420fa3ea 37079712 .config console log report ci-android-414-kasan-gce-root
* Struck through repros no longer work on HEAD.