syzbot


INFO: task hung in __blkdev_get (4)
Status: auto-closed as invalid on 2020/01/15 05:33
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 953d, last: 953d
similar bugs (9):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-49 INFO: task hung in __blkdev_get C 1504 908d 1141d 0/3 public: reported C repro on 2019/04/12 00:00
android-44 INFO: task hung in __blkdev_get syz 521 910d 1139d 0/2 public: reported syz repro on 2019/04/14 00:02
android-414 INFO: task hung in __blkdev_get 1859 908d 1140d 0/1 auto-closed as invalid on 2020/02/28 16:13
upstream INFO: task hung in __blkdev_get (3) 1 1134d 1134d 0/22 closed as invalid on 2019/05/08 13:05
upstream INFO: task hung in __blkdev_get (2) 11 1232d 1356d 0/22 closed as dup on 2018/09/08 15:48
linux-4.14 INFO: task hung in __blkdev_get C 700 1d17h 1141d 0/1 upstream: reported C repro on 2019/04/11 13:17
upstream INFO: task hung in __blkdev_get C 662 1503d 1629d 6/22 fixed on 2018/05/08 18:30
linux-4.19 INFO: task hung in __blkdev_get C error 94 1d07h 1018d 0/1 upstream: reported C repro on 2019/08/13 00:10
upstream INFO: task hung in __blkdev_get (5) 8 531d 746d 0/22 auto-closed as invalid on 2021/03/11 14:46

Sample crash report:
INFO: task syz-executor.1:10231 blocked for more than 143 seconds.
      Not tainted 5.4.0-rc3+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.1  D28552 10231  10129 0x00004004
Call Trace:
 context_switch kernel/sched/core.c:3384 [inline]
 __schedule+0x94f/0x1e70 kernel/sched/core.c:4069
 schedule+0xd9/0x260 kernel/sched/core.c:4136
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4195
 __mutex_lock_common kernel/locking/mutex.c:1033 [inline]
 __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1103
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118
 __blkdev_get+0x19b/0x1660 fs/block_dev.c:1553
 blkdev_get+0x47/0x2c0 fs/block_dev.c:1707
 blkdev_open+0x205/0x290 fs/block_dev.c:1846
 do_dentry_open+0x4e6/0x1380 fs/open.c:797
 vfs_open+0xa0/0xd0 fs/open.c:914
 do_last fs/namei.c:3408 [inline]
 path_openat+0x10e9/0x46d0 fs/namei.c:3525
 do_filp_open+0x1a1/0x280 fs/namei.c:3555
 do_sys_open+0x3fe/0x5d0 fs/open.c:1097
 __do_sys_open fs/open.c:1115 [inline]
 __se_sys_open fs/open.c:1110 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1110
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x413941
Code: Bad RIP value.
RSP: 002b:00007f5c9ffe19f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007f5c9ffe26d4 RCX: 0000000000413941
RDX: 00007f5c9ffe1baa RSI: 0000000000000002 RDI: 00007f5c9ffe1ba0
RBP: 00000000000001bf R08: 0000000000000000 R09: 000000000000000a
R10: 0000000000000075 R11: 0000000000000293 R12: 0000000000000003
R13: 0000000000000003 R14: 00007f5c9ffe26d4 R15: 00000000ffffffff
INFO: task blkid:10366 blocked for more than 145 seconds.
      Not tainted 5.4.0-rc3+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid           D28552 10366  10221 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:3384 [inline]
 __schedule+0x94f/0x1e70 kernel/sched/core.c:4069
 schedule+0xd9/0x260 kernel/sched/core.c:4136
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4195
 __mutex_lock_common kernel/locking/mutex.c:1033 [inline]
 __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1103
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118
 __blkdev_get+0x19b/0x1660 fs/block_dev.c:1553
 __blkdev_get+0xa5c/0x1660 fs/block_dev.c:1613
 blkdev_get+0x47/0x2c0 fs/block_dev.c:1707
 blkdev_open+0x205/0x290 fs/block_dev.c:1846
 do_dentry_open+0x4e6/0x1380 fs/open.c:797
 vfs_open+0xa0/0xd0 fs/open.c:914
 do_last fs/namei.c:3408 [inline]
 path_openat+0x10e9/0x46d0 fs/namei.c:3525
 do_filp_open+0x1a1/0x280 fs/namei.c:3555
 do_sys_open+0x3fe/0x5d0 fs/open.c:1097
 __do_sys_open fs/open.c:1115 [inline]
 __se_sys_open fs/open.c:1110 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1110
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7ffa32668120
Code: Bad RIP value.
RSP: 002b:00007ffcd1b39908 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ffa32668120
RDX: 00007ffcd1b3af02 RSI: 0000000000000000 RDI: 00007ffcd1b3af02
RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000178a030
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005
INFO: task blkid:10377 blocked for more than 149 seconds.
      Not tainted 5.4.0-rc3+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid           D28384 10377  10229 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:3384 [inline]
 __schedule+0x94f/0x1e70 kernel/sched/core.c:4069
 schedule+0xd9/0x260 kernel/sched/core.c:4136
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4195
 __mutex_lock_common kernel/locking/mutex.c:1033 [inline]
 __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1103
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118
 __blkdev_get+0x19b/0x1660 fs/block_dev.c:1553
 __blkdev_get+0xa5c/0x1660 fs/block_dev.c:1613
 blkdev_get+0x47/0x2c0 fs/block_dev.c:1707
 blkdev_open+0x205/0x290 fs/block_dev.c:1846
 do_dentry_open+0x4e6/0x1380 fs/open.c:797
 vfs_open+0xa0/0xd0 fs/open.c:914
 do_last fs/namei.c:3408 [inline]
 path_openat+0x10e9/0x46d0 fs/namei.c:3525
 do_filp_open+0x1a1/0x280 fs/namei.c:3555
 do_sys_open+0x3fe/0x5d0 fs/open.c:1097
 __do_sys_open fs/open.c:1115 [inline]
 __se_sys_open fs/open.c:1110 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1110
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fc19139c120
Code: Bad RIP value.
RSP: 002b:00007fffe64766e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc19139c120
RDX: 00007fffe6478f0b RSI: 0000000000000000 RDI: 00007fffe6478f0b
RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000df5030
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005
INFO: task blkid:10378 blocked for more than 151 seconds.
      Not tainted 5.4.0-rc3+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid           D28384 10378  10228 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:3384 [inline]
 __schedule+0x94f/0x1e70 kernel/sched/core.c:4069
 schedule+0xd9/0x260 kernel/sched/core.c:4136
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:4195
 __mutex_lock_common kernel/locking/mutex.c:1033 [inline]
 __mutex_lock+0x7b0/0x13c0 kernel/locking/mutex.c:1103
 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:1118
 __blkdev_get+0x19b/0x1660 fs/block_dev.c:1553
 __blkdev_get+0xa5c/0x1660 fs/block_dev.c:1613
 blkdev_get+0x47/0x2c0 fs/block_dev.c:1707
 blkdev_open+0x205/0x290 fs/block_dev.c:1846
 do_dentry_open+0x4e6/0x1380 fs/open.c:797
 vfs_open+0xa0/0xd0 fs/open.c:914
 do_last fs/namei.c:3408 [inline]
 path_openat+0x10e9/0x46d0 fs/namei.c:3525
 do_filp_open+0x1a1/0x280 fs/namei.c:3555
 do_sys_open+0x3fe/0x5d0 fs/open.c:1097
 __do_sys_open fs/open.c:1115 [inline]
 __se_sys_open fs/open.c:1110 [inline]
 __x64_sys_open+0x7e/0xc0 fs/open.c:1110
 do_syscall_64+0xfa/0x760 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f5c02f41120
Code: Bad RIP value.
RSP: 002b:00007ffcb980d1c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5c02f41120
RDX: 00007ffcb980df0b RSI: 0000000000000000 RDI: 00007ffcb980df0b
RBP: 0000000000000000 R08: 0000000000000078 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000e16030
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000005
INFO: task blkid:10379 blocked for more than 153 seconds.
      Not tainted 5.4.0-rc3+ #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
blkid           D28384 10379  10222 0x00000000
Call Trace:
 context_switch kernel/sched/core.c:3384 [inline]
 __schedule+0x94f/0x1e70 kernel/sched/core.c:4069

Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2019/10/17 05:29 upstream bc88f85c6c09 8c88c9c1 .config log report