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INFO: task hung in lock_rename

Status: auto-closed as invalid on 2019/05/30 13:09
Subsystems: exfat
[Documentation on labels]
Reported-by: syzbot+d46c8cc1d0f9b74a27f5@syzkaller.appspotmail.com
First crash: 2246d, last: 2111d
▶ ▼ Similar bugs (10)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in lock_rename (3) fs 1 1165d 1165d 0/27 auto-closed as invalid on 2021/10/02 18:08
linux-5.15 INFO: task hung in lock_rename 2 499d 531d 0/3 auto-obsoleted due to no activity on 2023/08/23 09:02
linux-6.1 INFO: task hung in lock_rename 3 354d 468d 0/3 auto-obsoleted due to no activity on 2024/01/01 05:54
upstream INFO: task hung in lock_rename (4) fs 3 954d 1047d 0/27 closed as invalid on 2022/02/08 09:40
linux-4.19 INFO: task hung in lock_rename 1 977d 977d 0/1 auto-closed as invalid on 2022/05/08 10:15
upstream INFO: task hung in lock_rename (5) fs 2 909d 938d 0/27 auto-closed as invalid on 2022/06/15 04:15
upstream INFO: task hung in lock_rename (2) fs 7 1315d 1339d 0/27 auto-closed as invalid on 2021/05/17 09:31
linux-4.14 INFO: task hung in lock_rename 1 822d 822d 0/1 auto-obsoleted due to no activity on 2022/10/10 13:20
android-49 INFO: task hung in lock_rename C 9 2206d 1977d 0/3 public: reported C repro on 2019/04/14 00:00
upstream INFO: task hung in lock_rename (6) ext4 18 501d 749d 0/27 auto-obsoleted due to no activity on 2023/07/28 16:10

Sample crash report:
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
INFO: task syz-executor0:16298 blocked for more than 140 seconds.
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
      Not tainted 4.20.0-rc4+ #357
device loop0 blocksize: 4096
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
__find_get_block_slow() failed. block=1, b_blocknr=8
syz-executor0   D25208 16298  12960 0x00000004
b_state=0x00000029, b_size=512
Call Trace:
device loop0 blocksize: 4096
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 schedule+0xfe/0x460 kernel/sched/core.c:3516
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 __rwsem_down_write_failed_common+0xc9a/0x15e0 kernel/locking/rwsem-xadd.c:577
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write_nested+0xa9/0x130 kernel/locking/rwsem.c:195
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 inode_lock_nested include/linux/fs.h:792 [inline]
 lock_rename+0x236/0x290 fs/namei.c:2862
device loop0 blocksize: 4096
 do_renameat2+0x696/0x1180 fs/namei.c:4577
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 __do_sys_rename fs/namei.c:4673 [inline]
 __se_sys_rename fs/namei.c:4671 [inline]
 __x64_sys_rename+0x5e/0x80 fs/namei.c:4671
b_state=0x00000029, b_size=512
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
device loop0 blocksize: 4096
RIP: 0033:0x457569
Code: Bad RIP value.
__find_get_block_slow() failed. block=1, b_blocknr=8
RSP: 002b:00007fcc6766cc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569
RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000040
RBP: 000000000072bfa0 R08: 0000000000000000 R09: 0000000000000000
__find_get_block_slow() failed. block=1, b_blocknr=8
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc6766d6d4
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
R13: 00000000004c39d3 R14: 00000000004d5fb0 R15: 00000000ffffffff
INFO: task syz-executor0:16300 blocked for more than 140 seconds.
__find_get_block_slow() failed. block=1, b_blocknr=8
      Not tainted 4.20.0-rc4+ #357
b_state=0x00000029, b_size=512
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D23832 16300  12960 0x00000004
device loop0 blocksize: 4096
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 schedule+0xfe/0x460 kernel/sched/core.c:3516
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 __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=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 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
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 inode_lock_shared include/linux/fs.h:767 [inline]
 lookup_slow+0x49/0x80 fs/namei.c:1687
device loop0 blocksize: 4096
 walk_component+0x92b/0x2590 fs/namei.c:1810
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 lookup_last fs/namei.c:2273 [inline]
 path_lookupat.isra.43+0x212/0xc00 fs/namei.c:2318
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 filename_lookup+0x26a/0x520 fs/namei.c:2348
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 user_path_at_empty+0x40/0x50 fs/namei.c:2608
b_state=0x00000029, b_size=512
 user_path_at include/linux/namei.h:57 [inline]
 do_linkat+0x188/0xa90 fs/namei.c:4290
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 __do_sys_link fs/namei.c:4338 [inline]
 __se_sys_link fs/namei.c:4336 [inline]
 __x64_sys_link+0x5e/0x80 fs/namei.c:4336
__find_get_block_slow() failed. block=1, b_blocknr=8
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
device loop0 blocksize: 4096
RIP: 0033:0x457569
__find_get_block_slow() failed. block=1, b_blocknr=8
Code: Bad RIP value.
b_state=0x00000029, b_size=512
RSP: 002b:00007fcc6764bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
device loop0 blocksize: 4096
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569
__find_get_block_slow() failed. block=1, b_blocknr=8
RDX: 0000000000000000 RSI: 0000000020000200 RDI: 00000000200001c0
b_state=0x00000029, b_size=512
RBP: 000000000072c040 R08: 0000000000000000 R09: 0000000000000000
device loop0 blocksize: 4096
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc6764c6d4
__find_get_block_slow() failed. block=1, b_blocknr=8
R13: 00000000004f5fb3 R14: 00000000004d4480 R15: 00000000ffffffff
b_state=0x00000029, b_size=512
INFO: task syz-executor0:16303 blocked for more than 140 seconds.
device loop0 blocksize: 4096
      Not tainted 4.20.0-rc4+ #357
__find_get_block_slow() failed. block=1, b_blocknr=8
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
b_state=0x00000029, b_size=512
syz-executor0   D25688 16303  12960 0x00000004
device loop0 blocksize: 4096
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 schedule+0xfe/0x460 kernel/sched/core.c:3516
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 __rwsem_down_write_failed_common+0xc9a/0x15e0 kernel/locking/rwsem-xadd.c:577
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, 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_nested+0xa9/0x130 kernel/locking/rwsem.c:195
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 inode_lock_nested include/linux/fs.h:792 [inline]
 filename_create+0x1b2/0x5b0 fs/namei.c:3635
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 user_path_create fs/namei.c:3693 [inline]
 do_symlinkat+0xfe/0x2d0 fs/namei.c:4147
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 __do_sys_symlink fs/namei.c:4173 [inline]
 __se_sys_symlink fs/namei.c:4171 [inline]
 __x64_sys_symlink+0x59/0x80 fs/namei.c:4171
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
device loop0 blocksize: 4096
RIP: 0033:0x457569
Code: Bad RIP value.
__find_get_block_slow() failed. block=1, b_blocknr=8
RSP: 002b:00007fcc6762ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000058
b_state=0x00000029, b_size=512
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569
RDX: 0000000000000000 RSI: 0000000020000100 RDI: 00000000200000c0
RBP: 000000000072c0e0 R08: 0000000000000000 R09: 0000000000000000
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc6762b6d4
b_state=0x00000029, b_size=512
R13: 00000000004c4f9a R14: 00000000004d8c68 R15: 00000000ffffffff
INFO: task syz-executor0:16308 blocked for more than 140 seconds.
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
      Not tainted 4.20.0-rc4+ #357
b_state=0x00000029, b_size=512
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
device loop0 blocksize: 4096
syz-executor0   D23832 16308  12960 0x00000004
__find_get_block_slow() failed. block=1, b_blocknr=8
Call Trace:
b_state=0x00000029, b_size=512
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 schedule+0xfe/0x460 kernel/sched/core.c:3516
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, 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=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
b_state=0x00000029, b_size=512
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 down_read+0x9b/0x120 kernel/locking/rwsem.c:26
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 inode_lock_shared include/linux/fs.h:767 [inline]
 lookup_slow+0x49/0x80 fs/namei.c:1687
 walk_component+0x92b/0x2590 fs/namei.c:1810
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 lookup_last fs/namei.c:2273 [inline]
 path_lookupat.isra.43+0x212/0xc00 fs/namei.c:2318
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 filename_lookup+0x26a/0x520 fs/namei.c:2348
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 user_path_at_empty+0x40/0x50 fs/namei.c:2608
 user_path_at include/linux/namei.h:57 [inline]
 vfs_statx+0x129/0x210 fs/stat.c:185
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 vfs_lstat include/linux/fs.h:3170 [inline]
 __do_sys_newlstat+0x8f/0x110 fs/stat.c:352
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 __se_sys_newlstat fs/stat.c:346 [inline]
 __x64_sys_newlstat+0x54/0x80 fs/stat.c:346
device loop0 blocksize: 4096
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
device loop0 blocksize: 4096
RIP: 0033:0x457569
__find_get_block_slow() failed. block=1, b_blocknr=8
Code: Bad RIP value.
b_state=0x00000029, b_size=512
RSP: 002b:00007fcc67609c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000006
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569
RDX: 0000000000000000 RSI: 0000000020000a80 RDI: 0000000020000a40
device loop0 blocksize: 4096
RBP: 000000000072c180 R08: 0000000000000000 R09: 0000000000000000
__find_get_block_slow() failed. block=1, b_blocknr=8
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc6760a6d4
b_state=0x00000029, b_size=512
R13: 00000000004c2ac1 R14: 00000000004d4690 R15: 00000000ffffffff
device loop0 blocksize: 4096
INFO: task syz-executor0:16309 blocked for more than 140 seconds.
__find_get_block_slow() failed. block=1, b_blocknr=8
      Not tainted 4.20.0-rc4+ #357
b_state=0x00000029, b_size=512
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
device loop0 blocksize: 4096
syz-executor0   D25016 16309  12960 0x00000004
__find_get_block_slow() failed. block=1, b_blocknr=8
Call Trace:
b_state=0x00000029, b_size=512
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 schedule+0xfe/0x460 kernel/sched/core.c:3516
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, 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=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 call_rwsem_down_read_failed+0x18/0x30 arch/x86/lib/rwsem.S:94
b_state=0x00000029, b_size=512
 __down_read arch/x86/include/asm/rwsem.h:83 [inline]
 down_read+0x9b/0x120 kernel/locking/rwsem.c:26
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 inode_lock_shared include/linux/fs.h:767 [inline]
 lookup_slow+0x49/0x80 fs/namei.c:1687
 walk_component+0x92b/0x2590 fs/namei.c:1810
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 lookup_last fs/namei.c:2273 [inline]
 path_lookupat.isra.43+0x212/0xc00 fs/namei.c:2318
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 filename_lookup+0x26a/0x520 fs/namei.c:2348
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 user_path_at_empty+0x40/0x50 fs/namei.c:2608
device loop0 blocksize: 4096
 user_path_at include/linux/namei.h:57 [inline]
 vfs_statx+0x129/0x210 fs/stat.c:185
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 vfs_lstat include/linux/fs.h:3170 [inline]
 __do_sys_newlstat+0x8f/0x110 fs/stat.c:352
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 __se_sys_newlstat fs/stat.c:346 [inline]
 __x64_sys_newlstat+0x54/0x80 fs/stat.c:346
device loop0 blocksize: 4096
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
RIP: 0033:0x457569
b_state=0x00000029, b_size=512
Code: Bad RIP value.
device loop0 blocksize: 4096
RSP: 002b:00007fcc675e8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000006
__find_get_block_slow() failed. block=1, b_blocknr=8
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569
b_state=0x00000029, b_size=512
RDX: 0000000000000000 RSI: 00000000200008c0 RDI: 0000000020000880
device loop0 blocksize: 4096
RBP: 000000000072c220 R08: 0000000000000000 R09: 0000000000000000
__find_get_block_slow() failed. block=1, b_blocknr=8
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc675e96d4
b_state=0x00000029, b_size=512
R13: 00000000004c2ac1 R14: 00000000004d4690 R15: 00000000ffffffff
device loop0 blocksize: 4096
INFO: task syz-executor0:16310 blocked for more than 140 seconds.
__find_get_block_slow() failed. block=1, b_blocknr=8
      Not tainted 4.20.0-rc4+ #357
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D23136 16310  12960 0x00000004
b_state=0x00000029, b_size=512
Call Trace:
device loop0 blocksize: 4096
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x8cf/0x21d0 kernel/sched/core.c:3472
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 schedule+0xfe/0x460 kernel/sched/core.c:3516
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 __rwsem_down_read_failed_common kernel/locking/rwsem-xadd.c:280 [inline]
 rwsem_down_read_failed+0x371/0x710 kernel/locking/rwsem-xadd.c:297
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 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
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 inode_lock_shared include/linux/fs.h:767 [inline]
 lookup_slow+0x49/0x80 fs/namei.c:1687
 walk_component+0x92b/0x2590 fs/namei.c:1810
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 lookup_last fs/namei.c:2273 [inline]
 path_lookupat.isra.43+0x212/0xc00 fs/namei.c:2318
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 filename_lookup+0x26a/0x520 fs/namei.c:2348
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
 user_path_at_empty+0x40/0x50 fs/namei.c:2608
 user_path_at include/linux/namei.h:57 [inline]
 vfs_statx+0x129/0x210 fs/stat.c:185
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 vfs_stat include/linux/fs.h:3165 [inline]
 __do_sys_newstat+0x8f/0x110 fs/stat.c:339
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 __se_sys_newstat fs/stat.c:335 [inline]
 __x64_sys_newstat+0x54/0x80 fs/stat.c:335
b_state=0x00000029, b_size=512
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
device loop0 blocksize: 4096
RIP: 0033:0x457569
Code: Bad RIP value.
__find_get_block_slow() failed. block=1, b_blocknr=8
RSP: 002b:00007fcc675c7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000004
b_state=0x00000029, b_size=512
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569
RDX: 0000000000000000 RSI: 0000000020000600 RDI: 0000000020000180
RBP: 000000000072c2c0 R08: 0000000000000000 R09: 0000000000000000
device loop0 blocksize: 4096
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc675c86d4
R13: 00000000004df19b R14: 00000000004d8c20 R15: 00000000ffffffff
__find_get_block_slow() failed. block=1, b_blocknr=8

Showing all locks held in the system:
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
1 lock held by khungtaskd/1021:
 #0: 00000000ebdf4bb0 (rcu_read_lock){....}, at: debug_show_all_locks+0xd0/0x424 kernel/locking/lockdep.c:4379
__find_get_block_slow() failed. block=1, b_blocknr=8
1 lock held by rsyslogd/5982:
b_state=0x00000029, b_size=512
 #0: 00000000a8bf0836 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1bb/0x200 fs/file.c:766
2 locks held by getty/6071:
device loop0 blocksize: 4096
 #0: 00000000d29c3585 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 000000001ae6bd8f (&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=8
2 locks held by getty/6072:
b_state=0x00000029, b_size=512
 #0: 00000000c240973d (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 0000000028b16474 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
2 locks held by getty/6073:
b_state=0x00000029, b_size=512
 #0: 00000000c86dbdd8 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 0000000078bd1f83 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
device loop0 blocksize: 4096
2 locks held by getty/6074:
 #0: 00000000c5883798 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
__find_get_block_slow() failed. block=1, b_blocknr=8
 #1: 00000000f8a42619 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
b_state=0x00000029, b_size=512
2 locks held by getty/6075:
device loop0 blocksize: 4096
 #0: 00000000caccc19a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
__find_get_block_slow() failed. block=1, b_blocknr=8
 #1: 000000003543cfd6 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
b_state=0x00000029, b_size=512
device loop0 blocksize: 4096
2 locks held by getty/6076:
 #0: 000000005e5575d0 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
__find_get_block_slow() failed. block=1, b_blocknr=8
 #1: 00000000bb14335c (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
b_state=0x00000029, b_size=512
2 locks held by getty/6077:
 #0: 00000000652f148f (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
 #1: 0000000085b6d858 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x335/0x1e80 drivers/tty/n_tty.c:2154
device loop0 blocksize: 4096
2 locks held by syz-executor5/28898:
__find_get_block_slow() failed. block=1, b_blocknr=8
 #0: 00000000f8a70f13 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x32/0x40 drivers/tty/tty_ldsem.c:353
b_state=0x00000029, b_size=512
 #1: 00000000c9daa006 (&tty->atomic_write_lock){+.+.}, at: tty_write_lock+0x57/0x90 drivers/tty/tty_io.c:888
7 locks held by syz-executor0/16297:
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
2 locks held by syz-executor0/16298:
b_state=0x00000029, b_size=512
 #0: 0000000013754896 (sb_writers#12){.+.+}, at: sb_start_write include/linux/fs.h:1597 [inline]
 #0: 0000000013754896 (sb_writers#12){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360
 #1: 0000000056c79a9f (&sb->s_type->i_mutex_key#20/1){+.+.}, at: inode_lock_nested include/linux/fs.h:792 [inline]
 #1: 0000000056c79a9f (&sb->s_type->i_mutex_key#20/1){+.+.}, at: lock_rename+0x236/0x290 fs/namei.c:2862
device loop0 blocksize: 4096
1 lock held by syz-executor0/16300:
__find_get_block_slow() failed. block=1, b_blocknr=8
 #0: 0000000056c79a9f (&sb->s_type->i_mutex_key#20){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline]
 #0: 0000000056c79a9f (&sb->s_type->i_mutex_key#20){++++}, at: lookup_slow+0x49/0x80 fs/namei.c:1687
b_state=0x00000029, b_size=512
2 locks held by syz-executor0/16303:
device loop0 blocksize: 4096
 #0: 0000000013754896 (sb_writers#12){.+.+}, at: sb_start_write include/linux/fs.h:1597 [inline]
 #0: 0000000013754896 (sb_writers#12){.+.+}, at: mnt_want_write+0x3f/0xc0 fs/namespace.c:360
__find_get_block_slow() failed. block=1, b_blocknr=8
 #1: 0000000056c79a9f (&sb->s_type->i_mutex_key#20/1){+.+.}, at: inode_lock_nested include/linux/fs.h:792 [inline]
 #1: 0000000056c79a9f (&sb->s_type->i_mutex_key#20/1){+.+.}, at: filename_create+0x1b2/0x5b0 fs/namei.c:3635
b_state=0x00000029, b_size=512
1 lock held by syz-executor0/16308:
device loop0 blocksize: 4096
 #0: 0000000056c79a9f (&sb->s_type->i_mutex_key#20){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline]
 #0: 0000000056c79a9f (&sb->s_type->i_mutex_key#20){++++}, at: lookup_slow+0x49/0x80 fs/namei.c:1687
__find_get_block_slow() failed. block=1, b_blocknr=8
1 lock held by syz-executor0/16309:
 #0: 0000000056c79a9f (&sb->s_type->i_mutex_key#20){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline]
 #0: 0000000056c79a9f (&sb->s_type->i_mutex_key#20){++++}, at: lookup_slow+0x49/0x80 fs/namei.c:1687
b_state=0x00000029, b_size=512
1 lock held by syz-executor0/16310:
device loop0 blocksize: 4096
 #0: 0000000056c79a9f (&sb->s_type->i_mutex_key#20){++++}, at: inode_lock_shared include/linux/fs.h:767 [inline]
 #0: 0000000056c79a9f (&sb->s_type->i_mutex_key#20){++++}, at: lookup_slow+0x49/0x80 fs/namei.c:1687
__find_get_block_slow() failed. block=1, b_blocknr=8

b_state=0x00000029, b_size=512
=============================================

device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
NMI backtrace for cpu 0
b_state=0x00000029, b_size=512
CPU: 0 PID: 1021 Comm: khungtaskd Not tainted 4.20.0-rc4+ #357
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
device loop0 blocksize: 4096
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=1, b_blocknr=8
 nmi_cpu_backtrace.cold.2+0x5c/0xa1 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1e8/0x22a lib/nmi_backtrace.c:62
b_state=0x00000029, b_size=512
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38
 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
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000029, b_size=512
 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:
device loop0 blocksize: 4096
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.613 msecs
NMI backtrace for cpu 1
CPU: 1 PID: 16297 Comm: syz-executor0 Not tainted 4.20.0-rc4+ #357
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:arch_local_save_flags arch/x86/include/asm/paravirt.h:756 [inline]
RIP: 0010:lockdep_hardirqs_off+0xf6/0x2b0 kernel/locking/lockdep.c:2829
Code: 96 01 00 00 8b 0d aa 91 ad 09 85 c9 75 40 48 c7 c7 68 fb 51 89 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 <0f> 85 94 01 00 00 48 83 3d 44 15 f0 07 00 0f 84 84 01 00 00 9c 58
RSP: 0018:ffff8881daf07c00 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff8881c1492140 RCX: 0000000000000000
RDX: 1ffffffff12a3f6d RSI: 0000000000000000 RDI: ffffffff8951fb68
RBP: ffff8881daf07c18 R08: ffff8881c1492140 R09: 0000000000000008
R10: 0000000000000006 R11: ffff8881c1492140 R12: ffff8881c1492140
R13: ffffffff816e7b7e R14: ffff8881daf07db0 R15: ffff8881daf25d84
FS:  00007fcc6768e700(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffff600400 CR3: 00000001638e6000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 trace_hardirqs_off+0xb8/0x310 kernel/trace/trace_preemptirq.c:43
 seqcount_lockdep_reader_access include/linux/seqlock.h:83 [inline]
 read_seqcount_begin include/linux/seqlock.h:164 [inline]
 ktime_get_update_offsets_now+0x1ae/0x540 kernel/time/timekeeping.c:2223
 hrtimer_update_base kernel/time/hrtimer.c:587 [inline]
 hrtimer_interrupt+0x137/0x780 kernel/time/hrtimer.c:1500
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1034 [inline]
 smp_apic_timer_interrupt+0x1a1/0x760 arch/x86/kernel/apic/apic.c:1059
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:804
 </IRQ>
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 a3 37 ec 07 00 74 34 e8 dc c7 19 00 48 8b bd 90 fe ff ff 57 9d <0f> 1f 44 00 00 e9 aa fe ff ff e8 c4 c7 19 00 0f 0b e8 bd c7 19 00
RSP: 0018:ffff8881bcca6f80 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000040000 RBX: 1ffff11037994df6 RCX: ffffc9000f49c000
RDX: 0000000000040000 RSI: ffffffff8165c3d4 RDI: 0000000000000246
RBP: ffff8881bcca70f8 R08: ffff8881c1492a58 R09: 0000000000000006
R10: 0000000000000000 R11: ffff8881c1492140 R12: 0000000000000200
R13: 0000000000000000 R14: ffffed1037994e0a R15: ffff8881bcca70d0
 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.57+0xd8/0xff fs/buffer.c:1294
 __getblk_slow fs/buffer.c:1039 [inline]
 __getblk_gfp+0x2b3/0xd50 fs/buffer.c:1320
 __bread_gfp+0x2d/0x310 fs/buffer.c:1354
 sb_bread include/linux/buffer_head.h:307 [inline]
 fat__get_entry+0x5a6/0xa40 fs/fat/dir.c:101
 fat_get_entry fs/fat/dir.c:129 [inline]
 fat_search_long+0x33b/0x1570 fs/fat/dir.c:479
 vfat_find+0x16d/0x1a0 fs/fat/namei_vfat.c:697
 vfat_lookup+0x107/0x640 fs/fat/namei_vfat.c:711
 __lookup_hash+0x12e/0x190 fs/namei.c:1546
 filename_create+0x1e5/0x5b0 fs/namei.c:3636
 user_path_create fs/namei.c:3693 [inline]
 do_mkdirat+0xda/0x310 fs/namei.c:3832
 __do_sys_mkdir fs/namei.c:3856 [inline]
 __se_sys_mkdir fs/namei.c:3854 [inline]
 __x64_sys_mkdir+0x5c/0x80 fs/namei.c:3854
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x457569
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:00007fcc6768dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000457569
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcc6768e6d4
R13: 00000000004bcf1f R14: 00000000004d4738 R15: 00000000ffffffff

Crashes (53):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/12/01 13:08 upstream b6839ef26e54 d8988561 .config console log report ci-upstream-kasan-gce-root
2018/11/29 14:25 upstream 60b548237fed 4b6d14f2 .config console log report ci-upstream-kasan-gce-selinux-root
2018/11/15 13:58 upstream 5929a1f0ff30 5f5f6d14 .config console log report ci-upstream-kasan-gce-root
2018/10/27 00:24 upstream 18d0eae30e6a a8292de9 .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/26 14:01 upstream e5f6d9afa341 a8292de9 .config console log report ci-upstream-kasan-gce-root
2018/10/25 08:48 upstream 01aa9d518eae a8292de9 .config console log report ci-upstream-kasan-gce-root
2018/10/24 23:26 upstream 638820d8da8e a8292de9 .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/23 13:07 upstream 58a022870787 24fa2ad8 .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/21 19:47 upstream 23469de647c4 ecb386fe .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/21 10:11 upstream b0d04fb56b31 ecb386fe .config console log report ci-upstream-kasan-gce-smack-root
2018/10/19 18:34 upstream 91b15613ce7f 9aba67b5 .config console log report ci-upstream-kasan-gce-root
2018/10/19 08:07 upstream fa520c47eaa1 9aba67b5 .config console log report ci-upstream-kasan-gce-smack-root
2018/10/19 08:05 upstream fa520c47eaa1 9aba67b5 .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/16 03:42 upstream f0a7d1883d9f 8cd30605 .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/14 06:40 upstream 7ec21823634d caf12900 .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/13 08:24 upstream bab5c80b2110 caf12900 .config console log report ci-upstream-kasan-gce-smack-root
2018/10/12 06:12 upstream 0778a9f2dd92 ba6ddb43 .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/11 17:31 upstream 9dcd936c5312 5f818b4b .config console log report ci-upstream-kasan-gce-selinux-root
2018/10/05 04:51 upstream 10be83cc6418 8b311eaf .config console log report ci-upstream-kasan-gce-smack-root
2018/10/03 20:05 upstream 6bebe37927f3 8b311eaf .config console log report ci-upstream-kasan-gce-smack-root
2018/10/02 22:30 upstream 1d2ba7fee28b a316a2af .config console log report ci-upstream-kasan-gce-smack-root
2018/10/02 22:29 upstream 1d2ba7fee28b a316a2af .config console log report ci-upstream-kasan-gce-root
2018/09/30 12:53 upstream 291d0e5d81e1 41e4b329 .config console log report ci-upstream-kasan-gce-smack-root
2018/09/28 06:05 upstream c127e59bee3e 0c2fa87b .config console log report ci-upstream-kasan-gce-root
2018/09/26 19:08 upstream a38523185b40 455b6354 .config console log report ci-upstream-kasan-gce-selinux-root
2018/09/26 16:11 upstream a38523185b40 455b6354 .config console log report ci-upstream-kasan-gce-root
2018/09/24 07:46 upstream 6bf4ca7fbc85 28d9ac76 .config console log report ci-upstream-kasan-gce-root
2018/09/23 00:41 upstream 10dc890d4228 37079712 .config console log report ci-upstream-kasan-gce-selinux-root
2018/09/22 22:04 upstream 10dc890d4228 37079712 .config console log report ci-upstream-kasan-gce-selinux-root
2018/09/22 21:32 upstream 10dc890d4228 37079712 .config console log report ci-upstream-kasan-gce-root
2018/09/21 14:43 upstream 234b69e3e089 37079712 .config console log report ci-upstream-kasan-gce-selinux-root
2018/09/06 18:01 upstream b36fdc6853a3 0bb7a7eb .config console log report ci-upstream-kasan-gce-smack-root
2018/09/06 15:38 upstream b36fdc6853a3 0bb7a7eb .config console log report ci-upstream-kasan-gce-smack-root
2018/09/04 14:13 upstream 60c1f89241d4 a4718693 .config console log report ci-upstream-kasan-gce-root
2018/09/01 17:23 upstream 420f51f4ab6b a4718693 .config console log report ci-upstream-kasan-gce-root
2018/08/30 07:59 upstream ff69279a44e9 6c7e9d3d .config console log report ci-upstream-kasan-gce-root
2018/08/27 04:02 upstream aba16dc5cf93 758cd203 .config console log report ci-upstream-kasan-gce-root
2018/08/24 08:20 upstream 33e17876ea4e 95b5c82b .config console log report ci-upstream-kasan-gce-root
2018/08/20 11:31 upstream 2ad0d5269970 2dc4378f .config console log report ci-upstream-kasan-gce-root
2018/08/20 11:20 upstream 2ad0d5269970 2dc4378f .config console log report ci-upstream-kasan-gce-root
2018/08/17 21:08 upstream edb0a2000936 738da825 .config console log report ci-upstream-kasan-gce-root
2018/07/19 05:46 upstream 04a132065175 49f35839 .config console log report ci-upstream-kasan-gce
2018/09/02 03:58 linux-next a880148cb2af a4718693 .config console log report ci-upstream-linux-next-kasan-gce-root
* Struck through repros no longer work on HEAD.