syzbot


INFO: task hung in freeze_super (3)

Status: fixed on 2023/06/08 14:41
Subsystems: gfs2
[Documentation on labels]
Reported-by: syzbot+f51cb4b9afbd87ec06f2@syzkaller.appspotmail.com
Fix commit: b66f723bb552 gfs2: Improve gfs2_make_fs_rw error handling
First crash: 545d, last: 288d
Cause bisection: failed (error log, bisect log)
  
Discussions (5)
Title Replies (including bot) Last reply
[PATCH AUTOSEL 6.2 01/60] drm: panel-orientation-quirks: Add quirk for Lenovo Yoga Tab 3 X90F 62 (62) 2023/03/01 14:15
[PATCH AUTOSEL 5.15 01/25] drm/amd/display: Revert Reduce delay when sink device not able to ACK 00340h write 28 (28) 2023/02/27 14:59
[PATCH AUTOSEL 6.1 01/58] drm: panel-orientation-quirks: Add quirk for Lenovo Yoga Tab 3 X90F 59 (59) 2023/02/27 09:12
[PATCH AUTOSEL 5.10 01/19] drm/amd/display: Fix potential null-deref in dm_resume 19 (19) 2023/02/27 02:09
[syzbot] INFO: task hung in freeze_super (3) 4 (6) 2023/01/08 12:07
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in freeze_super gfs2 348 1064d 1139d 0/26 auto-closed as invalid on 2021/07/02 19:19
upstream INFO: task hung in freeze_super (2) gfs2 1 973d 973d 0/26 auto-closed as invalid on 2021/10/01 20:27
upstream INFO: task hung in freeze_super (4) gfs2 1 244d 244d 0/26 auto-obsoleted due to no activity on 2023/09/30 13:36
Last patch testing requests (1)
Created Duration User Patch Repo Result
2023/01/04 04:01 21m hdanton@sina.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master report log

Sample crash report:
INFO: task kworker/1:1H:52 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc2-syzkaller-00018-g4d6d4c7f541d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:1H    state:D stack:26160 pid:52    ppid:2      flags:0x00004000
Workqueue: glock_workqueue glock_work_func
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x187b/0x4900 kernel/sched/core.c:6669
 schedule+0xc3/0x180 kernel/sched/core.c:6745
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6804
 rwsem_down_write_slowpath+0xedd/0x13a0 kernel/locking/rwsem.c:1178
 __down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
 freeze_super+0x49/0x420 fs/super.c:1676
 freeze_go_sync+0x17e/0x340 fs/gfs2/glops.c:587
 do_xmote+0x36f/0x1400 fs/gfs2/glock.c:706
 glock_work_func+0x2d9/0x460 fs/gfs2/glock.c:1076
 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552
 kthread+0x2b8/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
INFO: task syz-executor965:5002 blocked for more than 143 seconds.
      Not tainted 6.4.0-rc2-syzkaller-00018-g4d6d4c7f541d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor965 state:D stack:23168 pid:5002  ppid:5001   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5343 [inline]
 __schedule+0x187b/0x4900 kernel/sched/core.c:6669
 schedule+0xc3/0x180 kernel/sched/core.c:6745
 schedule_timeout+0xb0/0x310 kernel/time/timer.c:2143
 do_wait_for_common+0x449/0x5f0 kernel/sched/completion.c:85
 __wait_for_common kernel/sched/completion.c:106 [inline]
 wait_for_common kernel/sched/completion.c:117 [inline]
 wait_for_completion+0x4a/0x60 kernel/sched/completion.c:138
 __flush_workqueue+0x743/0x1620 kernel/workqueue.c:2977
 gfs2_gl_hash_clear+0xc3/0x310 fs/gfs2/glock.c:2197
 gfs2_fill_super+0x23cf/0x2840 fs/gfs2/ops_fstype.c:1310
 get_tree_bdev+0x405/0x620 fs/super.c:1303
 gfs2_get_tree+0x54/0x210 fs/gfs2/ops_fstype.c:1335
 vfs_get_tree+0x8c/0x270 fs/super.c:1510
 do_new_mount+0x28f/0xae0 fs/namespace.c:3039
 do_mount fs/namespace.c:3382 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f309014c5ba
RSP: 002b:00007ffd75774688 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f309014c5ba
RDX: 0000000020000040 RSI: 000000002003b300 RDI: 00007ffd757746a0
RBP: 00007ffd757746a0 R08: 00007ffd757746e0 R09: 0000000000000002
R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004
R13: 0000555555e402c0 R14: 0000000000000000 R15: 00007ffd757746e0
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
 #0: ffffffff8cf27670 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
 #0: ffffffff8cf27a30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/29:
 #0: ffffffff8cf274a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
3 locks held by kworker/1:1H/52:
 #0: ffff888018ee3538 ((wq_completion)glock_workqueue){+.+.}-{0:0}, at: process_one_work+0x77e/0x10e0 kernel/workqueue.c:2378
 #1: ffffc90000bd7d20 ((work_completion)(&(&gl->gl_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7c8/0x10e0 kernel/workqueue.c:2380
 #2: ffff88801571a0e0 (&type->s_umount_key#43){+.+.}-{3:3}, at: freeze_super+0x49/0x420 fs/super.c:1676
1 lock held by klogd/4433:
 #0: ffff8880b993c1d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:558
2 locks held by getty/4753:
 #0: ffff88814af64098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2176
1 lock held by syz-executor965/5002:
 #0: ffff88801571a0e0 (&type->s_umount_key#42/1){+.+.}-{3:3}, at: alloc_super+0x217/0x930 fs/super.c:228

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

NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.4.0-rc2-syzkaller-00018-g4d6d4c7f541d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
 nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
 watchdog+0xec2/0xf00 kernel/hung_task.c:379
 kthread+0x2b8/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 12 Comm: kworker/u4:1 Not tainted 6.4.0-rc2-syzkaller-00018-g4d6d4c7f541d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x36/0x60 kernel/kcov.c:207
Code: 10 3b 78 7e 65 8b 15 11 3b 78 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 0c 16 00 00 00 74 2c 8b 91 e8 15 00 00 <83> fa 02 75 21 48 8b 91 f0 15 00 00 48 8b 32 48 8d 7e 01 8b 89 ec
RSP: 0018:ffffc90000117718 EFLAGS: 00000246
RAX: ffffffff8aac6a02 RBX: 1ffff92000022f41 RCX: ffff888014a55940
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff8aac69e7 R09: 0000000000000000
R10: ffffc900001179c0 R11: dffffc0000000001 R12: ffffc900001179c0
R13: dffffc0000000000 R14: 000000000000001f R15: ffffc90000117a0c
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005614fec7b680 CR3: 000000000cd30000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 insn_last_prefix_id arch/x86/include/asm/insn.h:207 [inline]
 insn_get_opcode+0x4b2/0xa50 arch/x86/lib/insn.c:304
 insn_get_modrm+0x22e/0x7a0 arch/x86/lib/insn.c:343
 insn_get_sib arch/x86/lib/insn.c:421 [inline]
 insn_get_displacement+0x13e/0x980 arch/x86/lib/insn.c:464
 insn_get_immediate+0x382/0x13d0 arch/x86/lib/insn.c:632
 insn_get_length arch/x86/lib/insn.c:707 [inline]
 insn_decode+0x370/0x500 arch/x86/lib/insn.c:747
 text_poke_loc_init+0xd6/0x680 arch/x86/kernel/alternative.c:2074
 arch_jump_label_transform_queue+0x75/0xd0 arch/x86/kernel/jump_label.c:138
 __jump_label_update+0x177/0x3a0 kernel/jump_label.c:475
 static_key_disable_cpuslocked+0xce/0x1b0 kernel/jump_label.c:235
 static_key_disable+0x1a/0x20 kernel/jump_label.c:243
 toggle_allocation_gate+0x1b8/0x250 mm/kfence/core.c:836
 process_one_work+0x8a0/0x10e0 kernel/workqueue.c:2405
 worker_thread+0xa63/0x1210 kernel/workqueue.c:2552
 kthread+0x2b8/0x350 kernel/kthread.c:379
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
 </TASK>

Crashes (19):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/05/19 03:34 upstream 4d6d4c7f541d 3bb7af1d .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-smack-root INFO: task hung in freeze_super
2023/01/01 06:19 upstream c8451c141e07 ab32d508 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs INFO: task hung in freeze_super
2022/12/25 20:26 upstream 72a85e2b0a1e 9da18ae8 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs INFO: task hung in freeze_super
2022/12/09 05:42 upstream f3e8416619ce 1034e5fa .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs INFO: task hung in freeze_super
2022/12/29 20:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a5541c0811a0 44712fbc .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 INFO: task hung in freeze_super
2022/12/09 12:09 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a5541c0811a0 1034e5fa .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 INFO: task hung in freeze_super
2023/01/29 14:30 upstream c96618275234 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in freeze_super
2022/12/20 01:33 upstream aeba12b26c79 c52b2efb .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in freeze_super
2022/11/08 08:22 upstream 59f2f4b8a757 6feb842b .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in freeze_super
2022/10/29 05:37 upstream b229b6ca5abb ea12ae9b .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root INFO: task hung in freeze_super
2022/10/26 22:14 upstream 4dc12f37a8e9 86777b7f .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs INFO: task hung in freeze_super
2023/04/23 18:43 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: task hung in freeze_super
2023/02/23 03:19 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a9b06ec42c0f 409945bc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: task hung in freeze_super
2023/01/05 00:53 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci a5541c0811a0 1dac8c7a .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 INFO: task hung in freeze_super
2022/11/06 14:55 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bbed346d5a96 6d752409 .config console log report info [disk image] [vmlinux] ci-upstream-gce-arm64 INFO: task hung in freeze_super
2022/11/02 13:21 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bbed346d5a96 edac4fd1 .config console log report info [disk image] [vmlinux] ci-upstream-gce-arm64 INFO: task hung in freeze_super
2022/10/28 05:25 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci bbed346d5a96 86777b7f .config console log report info [disk image] [vmlinux] ci-upstream-gce-arm64 INFO: task hung in freeze_super
2022/09/07 01:32 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 25050c56fa3c 5fc30c37 .config console log report info ci-upstream-gce-arm64 INFO: task hung in freeze_super
2022/09/04 21:08 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 85413d1e802e 28811d0a .config console log report info ci-upstream-gce-arm64 INFO: task hung in freeze_super
* Struck through repros no longer work on HEAD.