syzbot


INFO: task hung in path_openat
Status: closed as dup on 2018/09/08 15:37
Reported-by: syzbot+6e5c68656e4f10a1837d@syzkaller.appspotmail.com
First crash: 1516d, last: 1226d
Duplicate of (1):
Title Repro Cause bisect Fix bisect Count Last Reported
INFO: task hung in __blkdev_get (2) 11 1233d 1357d
similar bugs (10):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.19 INFO: task hung in path_openat 2 987d 1020d 0/1 auto-closed as invalid on 2020/01/11 07:40
upstream INFO: task hung in path_openat (4) 1 758d 758d 0/22 auto-closed as invalid on 2020/07/28 10:23
upstream INFO: task hung in path_openat (3) 4 918d 1034d 0/22 auto-closed as invalid on 2020/02/19 20:16
linux-4.19 INFO: task hung in path_openat (2) 1 187d 187d 0/1 auto-closed as invalid on 2022/03/21 04:47
linux-4.14 INFO: task hung in path_openat 1 427d 427d 0/1 auto-closed as invalid on 2021/07/23 23:26
android-49 INFO: task hung in path_openat 64 1158d 1139d 0/3 auto-closed as invalid on 2019/09/22 08:41
upstream INFO: task hung in path_openat (5) 23 399d 560d 0/22 auto-closed as invalid on 2021/07/22 20:44
upstream INFO: task hung in path_openat (6) 13 134d 284d 0/22 closed as invalid on 2022/02/07 19:19
android-414 INFO: task hung in path_openat 42 1062d 1140d 0/1 auto-closed as invalid on 2019/10/28 21:04
upstream INFO: task hung in path_openat (2) 1 1129d 1129d 0/22 closed as invalid on 2019/05/08 13:05

Sample crash report:
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
INFO: task syz-executor0:9141 blocked for more than 140 seconds.
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
      Not tainted 5.0.0-rc2+ #30
__find_get_block_slow() failed. block=1, b_blocknr=8
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
syz-executor0   D27144  9141   8448 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 schedule+0xfe/0x350 kernel/sched/core.c:3516
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 __rwsem_down_write_failed_common+0xa4d/0x1620 kernel/locking/rwsem-xadd.c:577
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
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=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 inode_lock include/linux/fs.h:757 [inline]
 do_last fs/namei.c:3321 [inline]
 path_openat+0x1967/0x5650 fs/namei.c:3534
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
 do_filp_open+0x26f/0x370 fs/namei.c:3564
 do_sys_open+0x59a/0x7c0 fs/open.c:1063
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
 __do_sys_open fs/open.c:1081 [inline]
 __se_sys_open fs/open.c:1076 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1076
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458099
device loop0 blocksize: 4096
Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
__find_get_block_slow() failed. block=1, b_blocknr=8
RSP: 002b:00007f150c94bc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458099
RDX: 0000000000000000 RSI: 00000000000001fe RDI: 0000000020000080
RBP: 000000000073c040 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f150c94c6d4
R13: 00000000004f4bff R14: 00000000004d7108 R15: 00000000ffffffff
INFO: task syz-executor0:9181 blocked for more than 140 seconds.
b_state=0x00000021, b_size=512
      Not tainted 5.0.0-rc2+ #30
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D27576  9181   8448 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
device loop0 blocksize: 4096
 schedule+0xfe/0x350 kernel/sched/core.c:3516
__find_get_block_slow() failed. block=1, b_blocknr=8
 __rwsem_down_write_failed_common+0xa4d/0x1620 kernel/locking/rwsem-xadd.c:577
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
b_state=0x00000021, b_size=512
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0xa5/0x130 kernel/locking/rwsem.c:72
device loop0 blocksize: 4096
 inode_lock include/linux/fs.h:757 [inline]
 generic_file_write_iter+0xe5/0x6a0 mm/filemap.c:3358
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
 call_write_iter include/linux/fs.h:1862 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x764/0xb40 fs/read_write.c:487
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
 vfs_write+0x20c/0x580 fs/read_write.c:549
 ksys_write+0x105/0x260 fs/read_write.c:598
device loop0 blocksize: 4096
 __do_sys_write fs/read_write.c:610 [inline]
 __se_sys_write fs/read_write.c:607 [inline]
 __x64_sys_write+0x73/0xb0 fs/read_write.c:607
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
__find_get_block_slow() failed. block=1, b_blocknr=8
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458099
Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f150c92ac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458099
RDX: 000000000000002e RSI: 0000000020000100 RDI: 0000000000000006
RBP: 000000000073c0e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f150c92b6d4
R13: 00000000004c734d R14: 00000000004dcc28 R15: 00000000ffffffff
INFO: task syz-executor0:9187 blocked for more than 140 seconds.
      Not tainted 5.0.0-rc2+ #30
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor0   D27576  9187   8448 0x00000004
Call Trace:
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
 schedule+0xfe/0x350 kernel/sched/core.c:3516
 __rwsem_down_write_failed_common+0xa4d/0x1620 kernel/locking/rwsem-xadd.c:577
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
b_state=0x00000021, b_size=512
 __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=0x00000021, b_size=512
 inode_lock_nested include/linux/fs.h:792 [inline]
 filename_create+0x1a8/0x5a0 fs/namei.c:3635
 user_path_create fs/namei.c:3693 [inline]
 do_mkdirat+0xcf/0x2f0 fs/namei.c:3831
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
 __do_sys_mkdir fs/namei.c:3855 [inline]
 __se_sys_mkdir fs/namei.c:3853 [inline]
 __x64_sys_mkdir+0x5c/0x80 fs/namei.c:3853
__find_get_block_slow() failed. block=1, b_blocknr=8
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
RIP: 0033:0x458099
b_state=0x00000021, b_size=512
Code: Bad RIP value.
device loop0 blocksize: 4096
RSP: 002b:00007f150c909c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000053
__find_get_block_slow() failed. block=1, b_blocknr=8
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 0000000000458099
b_state=0x00000021, b_size=512
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020001540
device loop0 blocksize: 4096
RBP: 000000000073c180 R08: 0000000000000000 R09: 0000000000000000
__find_get_block_slow() failed. block=1, b_blocknr=8
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f150c90a6d4
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
R13: 00000000004bd827 R14: 00000000004d6bf8 R15: 00000000ffffffff
b_state=0x00000021, b_size=512
INFO: task syz-executor0:9188 blocked for more than 140 seconds.
device loop0 blocksize: 4096
      Not tainted 5.0.0-rc2+ #30
__find_get_block_slow() failed. block=1, b_blocknr=8
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
syz-executor0   D24040  9188   8448 0x80000004
b_state=0x00000021, b_size=512
Call Trace:
device loop0 blocksize: 4096
 context_switch kernel/sched/core.c:2831 [inline]
 __schedule+0x897/0x1e60 kernel/sched/core.c:3472
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
 schedule+0xfe/0x350 kernel/sched/core.c:3516
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 __rwsem_down_write_failed_common+0xa4d/0x1620 kernel/locking/rwsem-xadd.c:577
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
 rwsem_down_write_failed+0xe/0x10 kernel/locking/rwsem-xadd.c:606
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:117
b_state=0x00000021, b_size=512
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0xa5/0x130 kernel/locking/rwsem.c:72
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
 inode_lock include/linux/fs.h:757 [inline]
 generic_file_write_iter+0xe5/0x6a0 mm/filemap.c:3358
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
 call_write_iter include/linux/fs.h:1862 [inline]
 new_sync_write fs/read_write.c:474 [inline]
 __vfs_write+0x764/0xb40 fs/read_write.c:487
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
 __kernel_write+0x110/0x3b0 fs/read_write.c:506
device loop0 blocksize: 4096
 write_pipe_buf+0x180/0x240 fs/splice.c:797
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
 splice_from_pipe_feed fs/splice.c:503 [inline]
 __splice_from_pipe+0x39a/0x7e0 fs/splice.c:627
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
 splice_from_pipe+0x1ea/0x310 fs/splice.c:662
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 default_file_splice_write+0x3c/0x90 fs/splice.c:809
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
 do_splice_from fs/splice.c:851 [inline]
 direct_splice_actor+0x126/0x1a0 fs/splice.c:1023
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 splice_direct_to_actor+0x3be/0x9d0 fs/splice.c:978
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 do_splice_direct+0x2c7/0x420 fs/splice.c:1066
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
 do_sendfile+0x61a/0xe60 fs/read_write.c:1436
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
 __do_sys_sendfile64 fs/read_write.c:1491 [inline]
 __se_sys_sendfile64 fs/read_write.c:1483 [inline]
 __x64_sys_sendfile64+0x15a/0x240 fs/read_write.c:1483
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
device loop0 blocksize: 4096
RIP: 0033:0x458099
__find_get_block_slow() failed. block=1, b_blocknr=8
Code: Bad RIP value.
b_state=0x00000021, b_size=512
RSP: 002b:00007f150c8e8c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
device loop0 blocksize: 4096
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000458099
__find_get_block_slow() failed. block=1, b_blocknr=8
RDX: 0000000020000000 RSI: 0000000000000006 RDI: 0000000000000006
b_state=0x00000021, b_size=512
RBP: 000000000073c220 R08: 0000000000000000 R09: 0000000000000000
device loop0 blocksize: 4096
R10: 00008080fffffffe R11: 0000000000000246 R12: 00007f150c8e96d4
R13: 00000000004c4f73 R14: 00000000004d8a28 R15: 00000000ffffffff
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8

Showing all locks held in the system:
b_state=0x00000021, b_size=512
1 lock held by khungtaskd/1040:
device loop0 blocksize: 4096
 #0: 00000000bcd87c42 (rcu_read_lock){....}, at: debug_show_all_locks+0xc6/0x41d kernel/locking/lockdep.c:4389
__find_get_block_slow() failed. block=1, b_blocknr=8
1 lock held by rsyslogd/8285:
b_state=0x00000021, b_size=512
 #0: 0000000076a3a336 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:795
device loop0 blocksize: 4096
2 locks held by getty/8407:
 #0: 000000004ca49d1a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
__find_get_block_slow() failed. block=1, b_blocknr=8
 #1: 000000006d259d71 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
b_state=0x00000021, b_size=512
2 locks held by getty/8408:
device loop0 blocksize: 4096
 #0: 00000000c75f7ab2 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000007d46b8fe (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/8409:
 #0: 0000000022ed3b2a (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000001e7c6736 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/8410:
 #0: 000000007584376e (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 000000003359136b (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
2 locks held by getty/8411:
 #0: 00000000d089aa40 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
__find_get_block_slow() failed. block=1, b_blocknr=8
 #1: 0000000062e4c521 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
b_state=0x00000021, b_size=512
2 locks held by getty/8412:
device loop0 blocksize: 4096
 #0: 000000005ba3dd53 (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
 #1: 00000000fc236b8f (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
__find_get_block_slow() failed. block=1, b_blocknr=8
2 locks held by getty/8413:
b_state=0x00000021, b_size=512
 #0: 00000000eafb09bb (&tty->ldisc_sem){++++}, at: ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:341
device loop0 blocksize: 4096
 #1: 000000009f2bc975 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x30a/0x1eb0 drivers/tty/n_tty.c:2154
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
2 locks held by syz-executor0/9128:
b_state=0x00000021, b_size=512
7 locks held by syz-executor0/9138:
device loop0 blocksize: 4096
1 lock held by syz-executor0/9141:
 #0: 000000006e82fb5b (&sb->s_type->i_mutex_key#21){++++}, at: inode_lock include/linux/fs.h:757 [inline]
 #0: 000000006e82fb5b (&sb->s_type->i_mutex_key#21){++++}, at: do_last fs/namei.c:3321 [inline]
 #0: 000000006e82fb5b (&sb->s_type->i_mutex_key#21){++++}, at: path_openat+0x1967/0x5650 fs/namei.c:3534
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
3 locks held by syz-executor0/9181:
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 #0: 0000000088ef4406 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x1b3/0x1f0 fs/file.c:795
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
 #1: 00000000411c9b31 (sb_writers#14){.+.+}, at: file_start_write include/linux/fs.h:2815 [inline]
 #1: 00000000411c9b31 (sb_writers#14){.+.+}, at: vfs_write+0x429/0x580 fs/read_write.c:548
__find_get_block_slow() failed. block=1, b_blocknr=8
 #2: 000000008d110738 (&sb->s_type->i_mutex_key#21){++++}, at: inode_lock include/linux/fs.h:757 [inline]
 #2: 000000008d110738 (&sb->s_type->i_mutex_key#21){++++}, at: generic_file_write_iter+0xe5/0x6a0 mm/filemap.c:3358
1 lock held by syz-executor0/9187:
 #0: 000000006e82fb5b (&sb->s_type->i_mutex_key#21/1){+.+.}, at: inode_lock_nested include/linux/fs.h:792 [inline]
 #0: 000000006e82fb5b (&sb->s_type->i_mutex_key#21/1){+.+.}, at: filename_create+0x1a8/0x5a0 fs/namei.c:3635
2 locks held by syz-executor0/9188:
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
device loop0 blocksize: 4096
__find_get_block_slow() failed. block=1, b_blocknr=8
 #0: 00000000411c9b31 (sb_writers#14){.+.+}, at: file_start_write include/linux/fs.h:2815 [inline]
 #0: 00000000411c9b31 (sb_writers#14){.+.+}, at: do_sendfile+0xad7/0xe60 fs/read_write.c:1435
b_state=0x00000021, b_size=512
 #1: 000000008d110738 (&sb->s_type->i_mutex_key#21){++++}, at: inode_lock include/linux/fs.h:757 [inline]
 #1: 000000008d110738 (&sb->s_type->i_mutex_key#21){++++}, at: generic_file_write_iter+0xe5/0x6a0 mm/filemap.c:3358
device loop0 blocksize: 4096

=============================================

__find_get_block_slow() failed. block=1, b_blocknr=8
NMI backtrace for cpu 1
b_state=0x00000021, b_size=512
CPU: 1 PID: 1040 Comm: khungtaskd Not tainted 5.0.0-rc2+ #30
device loop0 blocksize: 4096
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__find_get_block_slow() failed. block=1, b_blocknr=8
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1db/0x2d0 lib/dump_stack.c:113
b_state=0x00000021, b_size=512
 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62
device loop0 blocksize: 4096
 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:203 [inline]
 watchdog+0xbbb/0x1170 kernel/hung_task.c:287
__find_get_block_slow() failed. block=1, b_blocknr=8
b_state=0x00000021, b_size=512
 kthread+0x357/0x430 kernel/kthread.c:246
device loop0 blocksize: 4096
 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352
Sending NMI from CPU 1 to CPUs 0:
__find_get_block_slow() failed. block=1, b_blocknr=8
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.474 msecs
NMI backtrace for cpu 0
CPU: 0 PID: 9128 Comm: syz-executor0 Not tainted 5.0.0-rc2+ #30
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_is_held+0x9c/0x140 kernel/locking/lockdep.c:3659
Code: 08 00 00 85 c0 7f 23 e9 88 00 00 00 41 0f b6 45 00 41 83 c6 01 84 c0 74 08 3c 03 0f 8e 92 00 00 00 44 39 b3 78 08 00 00 7e 6a <48> 8b 4d d0 49 63 c6 4c 89 e6 48 8d 04 80 4c 8d 3c c1 4c 89 ff e8
RSP: 0018:ffff8880ae607be8 EFLAGS: 00000002
RAX: 0000000000000000 RBX: ffff88805909a440 RCX: dffffc0000000000
RDX: ffffed1015cc0f66 RSI: 0000000000000000 RDI: ffff88805909ad32
RBP: ffff8880ae607c28 R08: ffff88805909a440 R09: ffffed1015cc5b90
R10: ffffed1015cc5b8f R11: ffff8880ae62dc7b R12: ffffffff899a3e80
R13: ffffed100b213597 R14: 0000000000000003 R15: ffff88805909ad10
FS:  00007f150c98e700(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000045806f CR3: 00000000936dc000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 lock_is_held_type+0x110/0x210 kernel/locking/lockdep.c:3879
 lock_is_held include/linux/lockdep.h:337 [inline]
 rcu_read_lock_sched_held+0x110/0x130 kernel/rcu/update.c:117
 trace_hrtimer_cancel include/trace/events/timer.h:285 [inline]
 debug_deactivate kernel/time/hrtimer.c:463 [inline]
 __run_hrtimer kernel/time/hrtimer.c:1359 [inline]
 __hrtimer_run_queues+0xd98/0x1050 kernel/time/hrtimer.c:1451
 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1035 [inline]
 smp_apic_timer_interrupt+0x18d/0x760 arch/x86/kernel/apic/apic.c:1060
 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:807
 </IRQ>
RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:766 [inline]
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:1697 [inline]
RIP: 0010:vprintk_emit+0x84c/0x960 kernel/printk/printk.c:1930
Code: 00 fc ff df 48 c1 e8 03 80 3c 10 00 0f 85 ef 00 00 00 48 83 3d c4 54 2a 08 00 74 2d e8 fd d2 19 00 48 8b bd 10 ff ff ff 57 9d <0f> 1f 44 00 00 e9 a3 fe ff ff e8 e5 d2 19 00 0f 0b e8 de d2 19 00
RSP: 0018:ffff888056046d60 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000040000 RBX: 1ffff1100ac08db2 RCX: ffffc90005e5f000
RDX: 0000000000040000 RSI: ffffffff81682bf3 RDI: 0000000000000246
RBP: ffff888056046e58 R08: 0000000000000006 R09: ffff88805909ad30
R10: ffff88805909a440 R11: 0000000000000000 R12: 0000000000000200
R13: ffffed100ac08dbc R14: 0000000000000000 R15: ffff888056046e30
 vprintk_default+0x28/0x30 kernel/printk/printk.c:1958
 vprintk_func+0x7e/0x189 kernel/printk/printk_safe.c:398
 printk+0xba/0xed kernel/printk/printk.c:1991
 __find_get_block_slow fs/buffer.c:231 [inline]
 __find_get_block fs/buffer.c:1294 [inline]
 __find_get_block.cold+0x36/0xfb fs/buffer.c:1288
 __getblk_slow fs/buffer.c:1039 [inline]
 __getblk_gfp+0x295/0xd20 fs/buffer.c:1320
 __bread_gfp+0x2f/0x300 fs/buffer.c:1354
 sb_bread include/linux/buffer_head.h:307 [inline]
 fat__get_entry+0x586/0xa40 fs/fat/dir.c:101
 fat_get_entry fs/fat/dir.c:129 [inline]
 fat_search_long+0x345/0x17d0 fs/fat/dir.c:479
 vfat_find+0x10e/0x140 fs/fat/namei_vfat.c:697
 vfat_lookup+0x10a/0x6b0 fs/fat/namei_vfat.c:711
 lookup_open+0x726/0x1b80 fs/namei.c:3213
 do_last fs/namei.c:3324 [inline]
 path_openat+0x25fd/0x5650 fs/namei.c:3534
 do_filp_open+0x26f/0x370 fs/namei.c:3564
 do_sys_open+0x59a/0x7c0 fs/open.c:1063
 __do_sys_open fs/open.c:1081 [inline]
 __se_sys_open fs/open.c:1076 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1076
 do_syscall_64+0x1a3/0x800 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x458099
Code: 6d b7 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 3b b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f150c98dc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458099
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000200
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f150c98e6d4
R13: 00000000004f4bff R14: 00000000004d7108 R15: 00000000ffffffff

Crashes (246):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2019/01/17 11:02 upstream 7fbfee7c80de c2faf9b2 .config log report
ci-upstream-kasan-gce-smack-root 2019/01/14 10:24 upstream 1c7fc5cbc339 95485883 .config log report
ci-upstream-kasan-gce-selinux-root 2019/01/12 13:42 upstream 4b3c31c8d4dd c3f3344c .config log report
ci-upstream-kasan-gce-selinux-root 2019/01/10 16:57 upstream ba422731316d db9b6579 .config log report
ci-upstream-kasan-gce-smack-root 2019/01/08 20:03 upstream 3bd6e94bec12 010ed08b .config log report
ci-upstream-kasan-gce-smack-root 2019/01/07 22:13 upstream 3bd6e94bec12 69d69aa9 .config log report
ci-upstream-kasan-gce-selinux-root 2019/01/06 04:14 upstream f1c2f8857c5a 53be0a37 .config log report
ci-upstream-kasan-gce-selinux-root 2019/01/02 23:40 upstream 85f78456f286 06a2b89f .config log report
ci-upstream-kasan-gce-smack-root 2019/01/01 09:07 upstream f12e840c819b 3d85f48c .config log report
ci-upstream-kasan-gce-root 2018/12/31 00:51 upstream 195303136f19 2b42fdc8 .config log report
ci-upstream-kasan-gce-smack-root 2018/12/23 10:49 upstream 9105b8aa50c1 e3bd7ab8 .config log report
ci-upstream-kasan-gce-smack-root 2018/12/20 04:49 upstream ab63e725b49c 02e69052 .config log report
ci-upstream-kasan-gce-root 2018/12/19 19:13 upstream 62393dbcbe0f fe2dc057 .config log report
ci-upstream-kasan-gce-smack-root 2018/12/19 18:04 upstream 62393dbcbe0f fe2dc057 .config log report
ci-upstream-kasan-gce-smack-root 2018/12/18 23:00 upstream ddfbab46539f 4edaba93 .config log report
ci-upstream-kasan-gce-root 2018/12/12 22:02 upstream f5d582777bcb 02613a41 .config log report
ci-upstream-kasan-gce-root 2018/12/10 22:44 upstream 40e020c129cf 6565f24d .config log report
ci-upstream-kasan-gce-root 2018/12/05 20:30 upstream d08970904582 ac6c0578 .config log report
ci-upstream-kasan-gce-smack-root 2018/12/03 12:50 upstream 2595646791c3 819002b0 .config log report
ci-upstream-kasan-gce-root 2018/11/30 14:09 upstream 94f371cb7394 ade12e91 .config log report
ci-upstream-kasan-gce-smack-root 2018/11/29 23:11 upstream 60b548237fed 66071e27 .config log report
ci-upstream-kasan-gce-root 2018/11/27 11:43 upstream 6f8b52ba442c ac912200 .config log report
ci-upstream-kasan-gce-smack-root 2018/11/23 09:14 upstream edeca3a769ad 2b0dc848 .config log report
ci-upstream-kasan-gce-smack-root 2018/11/21 17:01 upstream c8ce94b8fe53 9db828b5 .config log report
ci-upstream-kasan-gce-root 2018/11/20 00:42 upstream f2ce1065e767 adf636a8 .config log report
ci-upstream-kasan-gce-root 2018/11/17 11:37 upstream 1ce80e0fe98e b08ee62a .config log report
ci-upstream-kasan-gce-selinux-root 2018/11/15 06:31 upstream d41217aac0a5 5f5f6d14 .config log report
ci-upstream-kasan-gce-smack-root 2018/11/14 09:45 upstream ccda4af0f4b9 5f5f6d14 .config log report
ci-upstream-kasan-gce-smack-root 2018/11/04 18:45 upstream 71e56028173b 8bd6bd63 .config log report
ci-upstream-kasan-gce-smack-root 2018/10/27 22:58 upstream 345671ea0f92 8efba39a .config log report
ci-upstream-kasan-gce-smack-root 2018/10/26 11:24 upstream e5f6d9afa341 a8292de9 .config log report
ci-upstream-kasan-gce-smack-root 2018/10/24 16:33 upstream 638820d8da8e a8292de9 .config log report
ci-upstream-kasan-gce-root 2018/10/23 10:00 upstream ca9eb48fe01f ecb386fe .config log report
ci-upstream-kasan-gce-root 2018/10/22 04:59 upstream 467e050e9760 ecb386fe .config log report
ci-upstream-kasan-gce 2018/08/03 21:55 upstream 0585df468e8f cc4f6d0a .config log report
ci-upstream-kasan-gce-root 2018/04/02 15:51 upstream 0adb32858b0b dc889257 .config log report
ci-upstream-linux-next-kasan-gce-root 2019/01/17 16:02 linux-next a37d50ca3b83 769e75ed .config log report
ci-upstream-linux-next-kasan-gce-root 2019/01/16 00:39 linux-next 5aa6589e17bd 79cb1a7c .config log report
ci-upstream-linux-next-kasan-gce-root 2019/01/08 04:17 linux-next 139287cc2cc0 69d69aa9 .config log report
ci-upstream-linux-next-kasan-gce-root 2019/01/05 23:46 linux-next a4983672f9ca 53be0a37 .config log report
ci-upstream-linux-next-kasan-gce-root 2018/12/31 11:42 linux-next 6a1d293238c1 2b42fdc8 .config log report
ci-upstream-linux-next-kasan-gce-root 2018/12/08 23:36 linux-next 74c4a24df7ca c7918378 .config log report
ci-upstream-linux-next-kasan-gce-root 2018/12/02 11:11 linux-next 442b8cea2477 e0d8c853 .config log report
ci-upstream-linux-next-kasan-gce-root 2018/11/26 18:51 linux-next 442b8cea2477 ac912200 .config log report
ci-upstream-linux-next-kasan-gce-root 2018/11/11 18:48 linux-next 442b8cea2477 7b5f8621 .config log report
ci-upstream-linux-next-kasan-gce-root 2018/11/01 13:07 linux-next 4db9d11bcbef 1f38e9ae .config log report
ci-upstream-linux-next-kasan-gce-root 2018/10/28 01:52 linux-next 8c60c36d0b8c 8efba39a .config log report
ci-upstream-linux-next-kasan-gce-root 2018/10/27 09:57 linux-next 8c60c36d0b8c a8292de9 .config log report
ci-upstream-linux-next-kasan-gce-root 2018/10/26 23:30 linux-next 8c60c36d0b8c a8292de9 .config log report
ci-upstream-linux-next-kasan-gce-root 2018/10/25 09:52 linux-next 8c60c36d0b8c a8292de9 .config log report
ci-upstream-linux-next-kasan-gce-root 2018/10/25 06:46 linux-next 8c60c36d0b8c a8292de9 .config log report
ci-upstream-kmsan-gce 2018/07/19 02:10 https://github.com/google/kmsan.git master 80ecacc456c1 49f35839 .config log report