syzbot


INFO: task hung in gfs2_jhead_process_page

Status: upstream: reported C repro on 2023/03/18 15:36
Bug presence: origin:upstream
[Documentation on labels]
Reported-by: syzbot+b18d60b52daf3883ffe4@syzkaller.appspotmail.com
First crash: 346d, last: 1d10h
Fix bisection: failed (error log, bisect log)
  
Bug presence (1)
Date Name Commit Repro Result
2023/10/10 upstream (ToT) 94f6f0550c62 C [report] INFO: task hung in gfs2_jhead_process_page
Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in gfs2_jhead_process_page cluster C error 367 10d 434d 0/26 upstream: reported C repro on 2022/12/21 02:23
linux-5.15 INFO: task hung in gfs2_jhead_process_page origin:upstream C error 17 32d 354d 0/3 upstream: reported C repro on 2023/03/10 07:53
Fix bisection attempts (2)
Created Duration User Patch Repo Result
2023/10/10 08:30 48m bisect fix linux-6.1.y error job log (0)
2023/07/28 16:29 4h05m bisect fix linux-6.1.y job log (0) log

Sample crash report:
INFO: task syz-executor736:3537 blocked for more than 143 seconds.
      Not tainted 6.1.46-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor736 state:D stack:23152 pid:3537  ppid:3536   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0x132c/0x4330 kernel/sched/core.c:6554
 schedule+0xbf/0x180 kernel/sched/core.c:6630
 io_schedule+0x88/0x100 kernel/sched/core.c:8774
 folio_wait_bit_common+0x868/0x1280 mm/filemap.c:1296
 folio_wait_locked include/linux/pagemap.h:1022 [inline]
 gfs2_jhead_process_page+0x18e/0x800 fs/gfs2/lops.c:476
 gfs2_find_jhead+0x688/0xef0 fs/gfs2/lops.c:583
 check_journal_clean+0x191/0x350 fs/gfs2/util.c:75
 init_journal+0x1879/0x2470 fs/gfs2/ops_fstype.c:830
 init_inodes+0xdc/0x310 fs/gfs2/ops_fstype.c:889
 gfs2_fill_super+0x1bbb/0x26e0 fs/gfs2/ops_fstype.c:1247
 get_tree_bdev+0x3fe/0x620 fs/super.c:1355
 gfs2_get_tree+0x50/0x210 fs/gfs2/ops_fstype.c:1330
 vfs_get_tree+0x88/0x270 fs/super.c:1562
 do_new_mount+0x28b/0xae0 fs/namespace.c:3040
 do_mount fs/namespace.c:3383 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f6e68fd116a
RSP: 002b:00007fff9b51bc28 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fff9b51bc40 RCX: 00007f6e68fd116a
RDX: 000000002001f680 RSI: 000000002001f6c0 RDI: 00007fff9b51bc40
RBP: 0000000000000004 R08: 00007fff9b51bc80 R09: 000000000001f672
R10: 0000000000000600 R11: 0000000000000282 R12: 0000000000000600
R13: 00007fff9b51bc80 R14: 0000000000000003 R15: 0000000001000000
 </TASK>

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffffffff8d12a0b0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/13:
 #0: ffffffff8d12a8b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
 #0: ffffffff8d129ee0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3266:
 #0: ffff888141a7e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
 #1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a7/0x1db0 drivers/tty/n_tty.c:2188
1 lock held by syz-executor736/3537:
 #0: ffff8880778880e0 (&type->s_umount_key#41/1){+.+.}-{3:3}, at: alloc_super+0x217/0x930 fs/super.c:228

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

NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.1.46-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 nmi_cpu_backtrace+0x4e1/0x560 lib/nmi_backtrace.c:111
 nmi_trigger_cpumask_backtrace+0x1b0/0x3f0 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
 watchdog+0xf18/0xf60 kernel/hung_task.c:377
 kthread+0x26e/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3533 Comm: kworker/u4:0 Not tainted 6.1.46-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:check_preemption_disabled+0x59/0x110 lib/smp_processor_id.c:19
Code: 48 8b 04 25 28 00 00 00 48 3b 44 24 08 0f 85 c7 00 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5e 41 5f c3 48 c7 04 24 00 00 00 00 9c <8f> 04 24 f7 04 24 00 02 00 00 74 c9 49 89 f6 49 89 ff 65 4c 8b 25
RSP: 0018:ffffc90000ac77e0 EFLAGS: 00000046
RAX: 0000000080000000 RBX: 0000000000000001 RCX: ffffffff816a1297
RDX: 0000000000000000 RSI: ffffffff8aebef00 RDI: ffffffff8b3ceae0
RBP: ffffc90000ac7950 R08: dffffc0000000000 R09: fffffbfff1ce6fce
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000158f10
R13: 0000000000000246 R14: ffffc90000ac78d0 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055584399e048 CR3: 000000000ce8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
 lock_release+0x19e/0xa20 kernel/locking/lockdep.c:5688
 __mutex_unlock_slowpath+0xde/0x750 kernel/locking/mutex.c:907
 arch_jump_label_transform_queue+0x7d/0xd0 arch/x86/kernel/jump_label.c:139
 __jump_label_update+0x177/0x3a0 kernel/jump_label.c:447
 static_key_disable_cpuslocked+0xca/0x1b0 kernel/jump_label.c:207
 static_key_disable+0x16/0x20 kernel/jump_label.c:215
 toggle_allocation_gate+0x3e0/0x480 mm/kfence/core.c:818
 process_one_work+0x8aa/0x11f0 kernel/workqueue.c:2292
 worker_thread+0xa5f/0x1210 kernel/workqueue.c:2439
 kthread+0x26e/0x300 kernel/kthread.c:376
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
 </TASK>
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.191 msecs

Crashes (19):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/08/23 13:04 linux-6.1.y 6c44e13dc284 b81ca3f6 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan INFO: task hung in gfs2_jhead_process_page
2023/06/13 16:54 linux-6.1.y 2f3918bc53fb 749afb64 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2024/01/25 21:58 linux-6.1.y 8fd7f4462453 cc4a4020 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in gfs2_jhead_process_page
2023/10/30 17:28 linux-6.1.y 32c9cdbe383c b5729d82 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan INFO: task hung in gfs2_jhead_process_page
2024/02/26 16:24 linux-6.1.y 81e1dc2f7001 da36a36b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2024/02/21 19:43 linux-6.1.y 8b4118fabd6e 345111b5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2024/01/18 13:29 linux-6.1.y fec3b1451d5f 239abf84 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2024/01/18 01:41 linux-6.1.y fec3b1451d5f 915053c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2023/10/12 10:27 linux-6.1.y 082280fe94a0 1b231e3c .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2023/04/24 23:11 linux-6.1.y f17b0ab65d17 fdc18293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2023/04/23 15:22 linux-6.1.y f17b0ab65d17 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2023/04/23 03:21 linux-6.1.y f17b0ab65d17 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2023/04/22 11:31 linux-6.1.y f17b0ab65d17 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2023/04/21 13:52 linux-6.1.y f17b0ab65d17 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2023/04/11 06:01 linux-6.1.y 543aff194ab6 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2023/04/09 15:54 linux-6.1.y 543aff194ab6 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2023/04/09 13:45 linux-6.1.y 543aff194ab6 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2023/04/09 05:35 linux-6.1.y 543aff194ab6 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
2023/03/18 15:36 linux-6.1.y 7eaef76fbc46 7939252e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-6-1-kasan-arm64 INFO: task hung in gfs2_jhead_process_page
* Struck through repros no longer work on HEAD.