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INFO: task hung in grab_super

Status: upstream: reported C repro on 2019/04/18 03:33
Subsystems: vfs udf
[Documentation on labels]
Reported-by: syzbot+a68eb85ce975f886362f@syzkaller.appspotmail.com
First crash: 2044d, last: 650d
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Similar bugs (10)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-414 INFO: task hung in grab_super 4 2214d 2052d 0/1 auto-closed as invalid on 2019/04/28 15:34
linux-4.14 INFO: task hung in grab_super C error 241 727d 2043d 0/1 upstream: reported C repro on 2019/04/19 12:37
android-414 INFO: task hung in grab_super (2) 2 1953d 1975d 0/1 auto-closed as invalid on 2019/11/15 12:55
android-49 INFO: task hung in grab_super 1 2292d 2292d 0/3 auto-closed as invalid on 2019/02/22 13:19
linux-5.15 INFO: task hung in grab_super 1 234d 234d 0/3 auto-obsoleted due to no activity on 2024/07/10 06:22
upstream INFO: task hung in grab_super udf C 209 669d 2318d 0/28 closed as dup on 2018/07/18 11:42
linux-6.1 INFO: task hung in grab_super 1 229d 229d 0/3 auto-obsoleted due to no activity on 2024/07/15 01:06
upstream INFO: task hung in grab_super (2) fs 1 533d 533d 0/28 auto-obsoleted due to no activity on 2023/09/05 02:19
upstream INFO: task hung in grab_super (3) nilfs ext4 20 226d 379d 0/28 auto-obsoleted due to no activity on 2024/07/07 20:46
android-49 INFO: task hung in grab_super (2) 1 1919d 1919d 0/3 auto-closed as invalid on 2019/12/19 00:51

Sample crash report:
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
INFO: task syz-executor469:8166 blocked for more than 140 seconds.
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
      Not tainted 4.19.201-syzkaller #0
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: Scanning with blocksize 512 failed
syz-executor469 D29672  8166   8118 0x00000004
UDF-fs: warning (device loop9): udf_fill_super: No partition found (1)
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
Call Trace:
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: warning (device loop11): udf_fill_super: No partition found (1)
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
 rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: Scanning with blocksize 512 failed
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0x4f/0x90 kernel/locking/rwsem.c:72
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: Scanning with blocksize 512 failed
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop7): udf_fill_super: No partition found (1)
 grab_super+0xa2/0x350 fs/super.c:383
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
 sget_userns+0x352/0xcd0 fs/super.c:511
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 512 failed
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
 sget+0x102/0x140 fs/super.c:570
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
 mount_bdev+0xf8/0x3b0 fs/super.c:1131
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
 mount_fs+0xa3/0x310 fs/super.c:1261
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2469 [inline]
 do_mount+0x113c/0x2f10 fs/namespace.c:2799
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: warning (device loop9): udf_fill_super: No partition found (1)
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 4096 failed
 ksys_mount+0xcf/0x130 fs/namespace.c:3015
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 2048 failed
 __do_sys_mount fs/namespace.c:3029 [inline]
 __se_sys_mount fs/namespace.c:3026 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3026
UDF-fs: warning (device loop11): udf_fill_super: No partition found (1)
UDF-fs: Scanning with blocksize 512 failed
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
RIP: 0033:0x44aa99
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 4096 failed
print_req_error: 293 callbacks suppressed
print_req_error: I/O error, dev loop11, sector 512
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
print_req_error: I/O error, dev loop9, sector 64
UDF-fs: warning (device loop7): udf_fill_super: No partition found (1)
print_req_error: I/O error, dev loop9, sector 1024
RSP: 002b:00007fc8bc2a8208 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
RAX: ffffffffffffffda RBX: 00000000004cb4e8 RCX: 000000000044aa99
print_req_error: I/O error, dev loop7, sector 64
UDF-fs: Scanning with blocksize 512 failed
print_req_error: I/O error, dev loop7, sector 256
RDX: 0000000020000180 RSI: 0000000020000080 RDI: 0000000020000100
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
RBP: 00000000004cb4e0 R08: 0000000000000000 R09: 0000000000000000
print_req_error: I/O error, dev loop11, sector 64
print_req_error: I/O error, dev loop11, sector 512
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
print_req_error: I/O error, dev loop9, sector 2048
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
print_req_error: I/O error, dev loop11, sector 1024
print_req_error: I/O error, dev loop7, sector 512
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cb4ec
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
R13: 00007ffc49dfd72f R14: 00007fc8bc2a8300 R15: 0000000000022000
UDF-fs: Scanning with blocksize 2048 failed
INFO: task syz-executor469:8167 blocked for more than 140 seconds.
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
      Not tainted 4.19.201-syzkaller #0
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: Scanning with blocksize 512 failed
syz-executor469 D29672  8167   8120 0x00000004
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
Call Trace:
 context_switch kernel/sched/core.c:2828 [inline]
 __schedule+0x887/0x2040 kernel/sched/core.c:3517
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
 schedule+0x8d/0x1b0 kernel/sched/core.c:3561
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline]
 rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop9): udf_fill_super: No partition found (1)
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117
UDF-fs: warning (device loop11): udf_fill_super: No partition found (1)
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
 __down_write arch/x86/include/asm/rwsem.h:142 [inline]
 down_write+0x4f/0x90 kernel/locking/rwsem.c:72
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
 grab_super+0xa2/0x350 fs/super.c:383
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 512 failed
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
 sget_userns+0x352/0xcd0 fs/super.c:511
UDF-fs: Scanning with blocksize 512 failed
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop7): udf_fill_super: No partition found (1)
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
 sget+0x102/0x140 fs/super.c:570
UDF-fs: Scanning with blocksize 1024 failed
 mount_bdev+0xf8/0x3b0 fs/super.c:1131
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
 mount_fs+0xa3/0x310 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2469 [inline]
 do_mount+0x113c/0x2f10 fs/namespace.c:2799
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
UDF-fs: Scanning with blocksize 512 failed
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
 ksys_mount+0xcf/0x130 fs/namespace.c:3015
UDF-fs: warning (device loop9): udf_fill_super: No partition found (1)
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
 __do_sys_mount fs/namespace.c:3029 [inline]
 __se_sys_mount fs/namespace.c:3026 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3026
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: warning (device loop11): udf_fill_super: No partition found (1)
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
UDF-fs: Scanning with blocksize 512 failed
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
RIP: 0033:0x44aa99
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
UDF-fs: Scanning with blocksize 512 failed
RSP: 002b:00007fc8bc2a8208 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
RAX: ffffffffffffffda RBX: 00000000004cb4e8 RCX: 000000000044aa99
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
RDX: 0000000020000180 RSI: 0000000020000080 RDI: 0000000020000100
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: Scanning with blocksize 4096 failed
RBP: 00000000004cb4e0 R08: 0000000000000000 R09: 0000000000000000
UDF-fs: warning (device loop7): udf_fill_super: No partition found (1)
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cb4ec
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: Scanning with blocksize 1024 failed
R13: 00007ffc49dfd72f R14: 00007fc8bc2a8300 R15: 0000000000022000
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256

Showing all locks held in the system:
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
1 lock held by khungtaskd/1570:
UDF-fs: Scanning with blocksize 512 failed
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
 #0: 0000000020c9c888 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
3 locks held by systemd-udevd/4699:
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: warning (device loop9): udf_fill_super: No partition found (1)
 #0: 0000000057b03c5f (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1824 [inline]
 #0: 0000000057b03c5f (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
 #1: 0000000057b03c5f (&rq->lock){-.-.}, at: rq_lock kernel/sched/sched.h:1824 [inline]
 #1: 0000000057b03c5f (&rq->lock){-.-.}, at: __schedule+0x1f9/0x2040 kernel/sched/core.c:3455
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
 #2: 0000000020c9c888 (rcu_read_lock){....}, at: trace_sched_stat_runtime include/trace/events/sched.h:428 [inline]
 #2: 0000000020c9c888 (rcu_read_lock){....}, at: update_curr+0x2c3/0x870 kernel/sched/fair.c:857
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: warning (device loop11): udf_fill_super: No partition found (1)
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: Scanning with blocksize 2048 failed
1 lock held by in:imklog/7876:
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
 #0: 000000005f592f21 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
1 lock held by syz-executor469/8124:
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
2 locks held by syz-executor469/8166:
UDF-fs: Scanning with blocksize 512 failed
UDF-fs: Scanning with blocksize 512 failed
 #0: 0000000045a40816 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: Scanning with blocksize 4096 failed
 #1: 000000007b8f1774 (&type->s_umount_key#47){+.+.}, at: grab_super+0xa2/0x350 fs/super.c:383
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop7): udf_fill_super: No partition found (1)
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
1 lock held by syz-executor469/8125:
2 locks held by syz-executor469/8167:
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 1024 failed
 #0: 0000000015b92e8b (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: Scanning with blocksize 1024 failed
 #1: 000000005acc9b30 (&type->s_umount_key#47){+.+.}, at: grab_super+0xa2/0x350 fs/super.c:383
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
1 lock held by syz-executor469/8190:
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
1 lock held by syz-executor469/14027:
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 512 failed
1 lock held by syz-executor469/14033:
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
UDF-fs: Scanning with blocksize 2048 failed
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
2 locks held by syz-executor469/14043:
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512
 #0: 00000000aa0ce207 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
 #1: 00000000881d60ee (&type->s_umount_key#47){+.+.}, at: grab_super+0xa2/0x350 fs/super.c:383
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: Scanning with blocksize 4096 failed
1 lock held by syz-executor469/14040:
2 locks held by syz-executor469/14049:
UDF-fs: warning (device loop9): udf_fill_super: No partition found (1)
UDF-fs: warning (device loop11): udf_fill_super: No partition found (1)
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
 #0: 0000000031df68c8 (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=256, location=256
 #1: 000000000be6e804 (&type->s_umount_key#47){+.+.}, at: grab_super+0xa2/0x350 fs/super.c:383
UDF-fs: Scanning with blocksize 2048 failed
1 lock held by syz-executor469/14053:
UDF-fs: Scanning with blocksize 512 failed
UDF-fs: error (device loop11): udf_read_tagged: read failed, block=512, location=512

UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
=============================================

UDF-fs: warning (device loop11): udf_load_vrs: No anchor found
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: Scanning with blocksize 512 failed
NMI backtrace for cpu 0
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.201-syzkaller #0
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
 watchdog+0x991/0xe60 kernel/hung_task.c:287
 kthread+0x33f/0x460 kernel/kthread.c:259
 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 8124 Comm: syz-executor469 Not tainted 4.19.201-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:constant_test_bit arch/x86/include/asm/bitops.h:317 [inline]
RIP: 0010:PageLocked include/linux/page-flags.h:272 [inline]
RIP: 0010:unlock_page+0xf5/0x230 mm/filemap.c:1228
Code: a1 5c e6 ff 4c 8b 6d 08 31 ff 48 89 eb 4d 89 ec 41 83 e4 01 4c 89 e6 e8 19 5e e6 ff 4d 85 e4 0f 85 ce 00 00 00 e8 7b 5c e6 ff <48> 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f
RSP: 0018:ffff88809671f6e0 EFLAGS: 00000293
RAX: ffff8880affec440 RBX: ffffea00022cc7c0 RCX: ffffffff817c2607
RDX: 0000000000000000 RSI: ffffffff817c2615 RDI: 0000000000000007
RBP: ffffea00022cc7c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
R13: ffffea00025e7088 R14: ffffea00022cc7c8 R15: ffffea00022cc7c0
FS:  00007fc8bc2ea700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f138002e000 CR3: 00000000b429b000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 grow_dev_page fs/buffer.c:982 [inline]
 grow_buffers fs/buffer.c:1017 [inline]
 __getblk_slow+0x5d0/0x9e0 fs/buffer.c:1044
 __getblk_gfp fs/buffer.c:1321 [inline]
 __bread_gfp+0x218/0x300 fs/buffer.c:1366
 sb_bread include/linux/buffer_head.h:309 [inline]
 udf_tread+0xe8/0x130 fs/udf/misc.c:44
 udf_read_tagged+0x4e/0x530 fs/udf/misc.c:210
 udf_check_anchor_block+0x1b4/0x610 fs/udf/super.c:1820
 udf_scan_anchors+0x3ba/0x5f0 fs/udf/super.c:1882
 udf_find_anchor fs/udf/super.c:1917 [inline]
 udf_load_vrs+0x633/0xbf0 fs/udf/super.c:1982
 udf_fill_super+0x7d2/0x1820 fs/udf/super.c:2177
 mount_bdev+0x2fc/0x3b0 fs/super.c:1158
 mount_fs+0xa3/0x310 fs/super.c:1261
 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
 vfs_kern_mount fs/namespace.c:951 [inline]
 do_new_mount fs/namespace.c:2469 [inline]
 do_mount+0x113c/0x2f10 fs/namespace.c:2799
 ksys_mount+0xcf/0x130 fs/namespace.c:3015
 __do_sys_mount fs/namespace.c:3029 [inline]
 __se_sys_mount fs/namespace.c:3026 [inline]
 __x64_sys_mount+0xba/0x150 fs/namespace.c:3026
 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x44aa99
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc8bc2ea208 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000004cb4c8 RCX: 000000000044aa99
RDX: 0000000020000180 RSI: 0000000020000080 RDI: 0000000020000100
RBP: 00000000004cb4c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004cb4cc
R13: 00007ffc49dfd72f R14: 00007fc8bc2ea300 R15: 0000000000022000
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found
UDF-fs: Scanning with blocksize 4096 failed
UDF-fs: Scanning with blocksize 1024 failed
UDF-fs: warning (device loop7): udf_fill_super: No partition found (1)
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=256, location=256
UDF-fs: error (device loop7): udf_read_tagged: read failed, block=512, location=512
UDF-fs: error (device loop9): udf_read_tagged: read failed, block=512, location=512
UDF-fs: warning (device loop7): udf_load_vrs: No anchor found
UDF-fs: warning (device loop9): udf_load_vrs: No anchor found

Crashes (249):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2021/08/08 04:51 linux-4.19.y 6ca2f514c578 6972b106 .config console log report syz C ci2-linux-4-19 INFO: task hung in grab_super
2021/07/03 04:43 linux-4.19.y 9f84340f012e 55aa55c2 .config console log report syz C ci2-linux-4-19 INFO: task hung in grab_super
2021/05/21 18:56 linux-4.19.y 3c8c23092588 3c7fef33 .config console log report syz C ci2-linux-4-19 INFO: task hung in grab_super
2021/04/28 02:56 linux-4.19.y 2965db2e004c 805b5003 .config console log report syz C ci2-linux-4-19 INFO: task hung in grab_super
2021/01/10 10:35 linux-4.19.y 610bdbf6a174 2c1f2513 .config console log report syz C ci2-linux-4-19
2021/01/07 11:21 linux-4.19.y 4143d798313f c104d4a3 .config console log report syz C ci2-linux-4-19
2021/01/02 00:31 linux-4.19.y 3207316b3bee 79264ae3 .config console log report syz C ci2-linux-4-19
2020/12/22 16:29 linux-4.19.y 13d2ce42de8c 04201c06 .config console log report syz C ci2-linux-4-19
2019/10/24 13:11 linux-4.19.y c3038e718a19 d01bb02a .config console log report syz C ci2-linux-4-19
2019/10/22 06:35 linux-4.19.y c3038e718a19 c59a7cd8 .config console log report syz C ci2-linux-4-19
2019/06/10 09:38 linux-4.19.y bb7b450e61a1 0159583c .config console log report syz C ci2-linux-4-19
2019/04/28 22:33 linux-4.19.y 19bb613acb9a b617407b .config console log report syz C ci2-linux-4-19
2023/02/09 23:39 linux-4.19.y 3f8a27f9e27b 07980f9d .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2023/02/08 23:27 linux-4.19.y 3f8a27f9e27b fc9c934e .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2023/01/17 13:40 linux-4.19.y 3f8a27f9e27b a63719e7 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2023/01/06 10:21 linux-4.19.y 3f8a27f9e27b 1dac8c7a .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/12/31 10:10 linux-4.19.y 3f8a27f9e27b ab32d508 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/12/28 13:49 linux-4.19.y 3f8a27f9e27b 44712fbc .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/11/25 16:51 linux-4.19.y 3f8a27f9e27b 74a66371 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/11/09 17:07 linux-4.19.y 3f8a27f9e27b bebca8b7 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/10/27 14:53 linux-4.19.y 3f8a27f9e27b 5c716ff6 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/10/16 09:43 linux-4.19.y 3f8a27f9e27b 67cb024c .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/10/14 19:12 linux-4.19.y 3f8a27f9e27b 4954e4b2 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/10/14 04:39 linux-4.19.y 3f8a27f9e27b 4954e4b2 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/10/11 04:59 linux-4.19.y 3f8a27f9e27b 5bcf0c31 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/09/29 01:03 linux-4.19.y 3f8a27f9e27b a41a2080 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/09/17 15:26 linux-4.19.y 3f8a27f9e27b dd9a85ff .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/09/16 16:27 linux-4.19.y 3f8a27f9e27b dd9a85ff .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/09/12 13:40 linux-4.19.y 3f8a27f9e27b 356d8217 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2022/09/12 06:21 linux-4.19.y 3f8a27f9e27b 356d8217 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2022/09/09 01:13 linux-4.19.y 3f8a27f9e27b f3027468 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2022/09/08 02:21 linux-4.19.y 3f8a27f9e27b 435aeef7 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/09/03 09:29 linux-4.19.y 3f8a27f9e27b 49e94a20 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/09/02 19:40 linux-4.19.y 3f8a27f9e27b 25194605 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/08/31 08:57 linux-4.19.y 3f8a27f9e27b 4a380809 .config console log report info [disk image] [vmlinux] ci2-linux-4-19 INFO: task hung in grab_super
2022/08/24 08:18 linux-4.19.y 3f8a27f9e27b cea8b0f7 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2022/08/23 04:44 linux-4.19.y 3f8a27f9e27b 26a13b38 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2022/08/17 02:02 linux-4.19.y 3f8a27f9e27b 9e4b39c2 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2022/07/24 05:05 linux-4.19.y 3f8a27f9e27b 22343af4 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2022/06/20 19:14 linux-4.19.y 3f8a27f9e27b b9406563 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2022/06/09 07:13 linux-4.19.y 3f8a27f9e27b 0d5abf15 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2022/05/17 09:21 linux-4.19.y 3f8a27f9e27b 744a39e2 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2022/04/03 03:50 linux-4.19.y 3f8a27f9e27b 79a2a8fc .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2022/03/05 07:45 linux-4.19.y 3f8a27f9e27b 45a13a73 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2022/02/28 19:14 linux-4.19.y 3f8a27f9e27b 45a13a73 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2022/01/29 07:20 linux-4.19.y 3f8a27f9e27b 495e00c5 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/12/03 06:28 linux-4.19.y 3f8a27f9e27b 61f86278 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/30 04:54 linux-4.19.y 3f8a27f9e27b d0830353 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/28 16:59 linux-4.19.y 3f8a27f9e27b 63eeac02 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/28 14:42 linux-4.19.y 3f8a27f9e27b 63eeac02 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/28 11:36 linux-4.19.y 3f8a27f9e27b 63eeac02 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/20 13:24 linux-4.19.y 3f8a27f9e27b 4eb20a4e .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/19 11:39 linux-4.19.y 3f8a27f9e27b 31a30fc0 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/16 00:59 linux-4.19.y 3f8a27f9e27b 75b04091 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/13 07:39 linux-4.19.y 3f8a27f9e27b 75b04091 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/12 12:30 linux-4.19.y 3f8a27f9e27b 75b04091 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/12 04:59 linux-4.19.y 3f8a27f9e27b 75b04091 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/10 22:55 linux-4.19.y 3f8a27f9e27b 75b04091 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/10 07:03 linux-4.19.y 3f8a27f9e27b 55fa030c .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/09 11:45 linux-4.19.y 3f8a27f9e27b 8ab17e57 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/09 03:17 linux-4.19.y 3f8a27f9e27b 8ab17e57 .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2021/11/07 16:35 linux-4.19.y 3f8a27f9e27b 4c1be0be .config console log report info ci2-linux-4-19 INFO: task hung in grab_super
2019/04/18 02:33 linux-4.19.y 4b0e041c9dad b0e8efcb .config console log report ci2-linux-4-19
* Struck through repros no longer work on HEAD.