INFO: task kworker/1:0:27 blocked in I/O wait for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/1:0 state:D stack:22400 pid:27 tgid:27 ppid:2 task_flags:0x4208060 flags:0x00080000
Workqueue: gfs2_recovery gfs2_recover_func
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
io_schedule+0x7f/0xd0 kernel/sched/core.c:8146
folio_wait_bit_common+0x85e/0xc40 mm/filemap.c:1328
folio_wait_locked include/linux/pagemap.h:1291 [inline]
gfs2_jhead_process_page+0x17f/0x670 fs/gfs2/lops.c:472
gfs2_find_jhead+0xbe0/0xd20 fs/gfs2/lops.c:588
gfs2_recover_func+0x707/0x1f40 fs/gfs2/recovery.c:458
process_one_work kernel/workqueue.c:3495 [inline]
process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3578
worker_thread+0xa47/0xfb0 kernel/workqueue.c:3659
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz.8.970:10216 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.8.970 state:D stack:25096 pid:10216 tgid:10213 ppid:8475 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x17dd/0x5820 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
bit_wait+0x13/0x110 kernel/sched/wait_bit.c:248
__wait_on_bit+0xac/0x300 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_bit include/linux/wait_bit.h:78 [inline]
gfs2_recover_journal+0xd5/0x140 fs/gfs2/recovery.c:578
init_journal+0x17da/0x2390 fs/gfs2/ops_fstype.c:794
init_inodes+0xdb/0x320 fs/gfs2/ops_fstype.c:844
gfs2_fill_super+0x193f/0x20b0 fs/gfs2/ops_fstype.c:1250
get_tree_bdev_flags+0x430/0x4f0 fs/super.c:1883
gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1331
vfs_get_tree+0x92/0x2a0 fs/super.c:1943
fc_mount fs/namespace.c:1282 [inline]
do_new_mount_fc fs/namespace.c:3910 [inline]
do_new_mount+0x325/0xb00 fs/namespace.c:3986
do_mount fs/namespace.c:4350 [inline]
__do_sys_mount fs/namespace.c:4565 [inline]
__se_sys_mount+0x31d/0x420 fs/namespace.c:4542
do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f76ea99f7ca
RSP: 002b:00007f76eb8fae58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f76eb8faee0 RCX: 00007f76ea99f7ca
RDX: 00002000000004c0 RSI: 0000200000000500 RDI: 00007f76eb8faea0
RBP: 00002000000004c0 R08: 00007f76eb8faee0 R09: 0000000000000010
R10: 0000000000000010 R11: 0000000000000246 R12: 0000200000000500
R13: 00007f76eb8faea0 R14: 0000000000037fbd R15: 00002000000000c0
Showing all locks held in the system:
locks held by kworker/1:0/27: 2, on CPU#1:
#0: ffff88801e78d148 ((wq_completion)gfs2_recovery){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffff88801e78d148 ((wq_completion)gfs2_recovery){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffff88801e78d148 ((wq_completion)gfs2_recovery){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#0: ffff88801e78d148 ((wq_completion)gfs2_recovery){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
#1: ffffc90000a1fc40 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffc90000a1fc40 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffc90000a1fc40 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#1: ffffc90000a1fc40 ((work_completion)(&jd->jd_work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
locks held by khungtaskd/35: 1, last CPU#0:
#0: ffffffff8fd5a420 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffffffff8fd5a420 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8fd5a420 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6871
locks held by getty/5364: 2, on CPU#0:
#0: ffff8880377130a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000322e2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211
locks held by kworker/u8:12/6042: 2, on CPU#0:
#0: ffff88801c0ac148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffff88801c0ac148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffff88801c0ac148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#0: ffff88801c0ac148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
#1: ffffc9000593fc40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffc9000593fc40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffc9000593fc40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3460 [inline]
#1: ffffc9000593fc40 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_scheduled_works+0x97a/0x1630 kernel/workqueue.c:3578
locks held by syz.8.970/10216: 1, on CPU#1:
#0: ffff88807b3740e8 (&type->s_umount_key#87/1){+.+.}-{4:4}, at: alloc_super fs/super.c:351 [inline]
#0: ffff88807b3740e8 (&type->s_umount_key#87/1){+.+.}-{4:4}, at: sget_fc+0x9cf/0x1a60 fs/super.c:874
locks held by syz.9.1369/11917: 4, last CPU#0:
#0: ffffffff912520e8 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x51f/0x770 net/core/net_namespace.c:578
#1: ffff88801d2dcaa0 (&root->kernfs_supers_rwsem){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x3f/0x140 fs/kernfs/dir.c:1790
#2: ffff88801d2dc980 (&root->kernfs_rwsem){++++}-{4:4}, at: kernfs_remove_by_name_ns+0x4e/0x140 fs/kernfs/dir.c:1791
#3: ffffffff8fc33ed8 (console_srcu){....}-{0:0}, at: rcu_try_lock_acquire include/linux/rcupdate.h:314 [inline]
#3: ffffffff8fc33ed8 (console_srcu){....}-{0:0}, at: srcu_read_lock_nmisafe include/linux/srcu.h:493 [inline]
#3: ffffffff8fc33ed8 (console_srcu){....}-{0:0}, at: console_srcu_read_lock+0x30/0x60 kernel/printk/printk.c:291
locks held by syz.0.1389/12015: 1, on CPU#0:
#0: ffffffff8fd60978 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x175/0x610 kernel/rcu/tree.c:4002
locks held by sed/12033: 2, last CPU#1:
#0: ffff88801cb12800 (&mm->mmap_lock){++++}-{4:4}, at: mmap_read_lock include/linux/mmap_lock.h:600 [inline]
#0: ffff88801cb12800 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x19c/0xa40 mm/mmap.c:1299
#1: ffffffff8fd5a420 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#1: ffffffff8fd5a420 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#1: ffffffff8fd5a420 (rcu_read_lock){....}-{1:3}, at: __pte_offset_map+0x29/0x240 mm/pgtable-generic.c:302
locks held by syz.3.1393/12039: 2, on CPU#0:
#0: ffff888034c118e0 (&nft_net->commit_mutex){+.+.}-{4:4}, at: nf_tables_valid_genid+0x3e/0x100 net/netfilter/nf_tables_api.c:11540
#1: ffffffff8fd60aa8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:311 [inline]
#1: ffffffff8fd60aa8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2cb/0x760 kernel/rcu/tree_exp.h:966
locks held by modprobe/12038: 3, last CPU#0:
#0: ffff88807f344cc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:532 [inline]
#0: ffff88807f344cc0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x2d5/0xa40 mm/mmap.c:1323
#1: ffffffff9059ac80 (fill_pool_map-wait-type-override){+.+.}-{3:3}, at: debug_objects_fill_pool lib/debugobjects.c:779 [inline]
#1: ffffffff9059ac80 (fill_pool_map-wait-type-override){+.+.}-{3:3}, at: debug_object_activate+0x364/0x420 lib/debugobjects.c:869
#2: ffffffff8fd5a420 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#2: ffffffff8fd5a420 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#2: ffffffff8fd5a420 (rcu_read_lock){....}-{1:3}, at: class_rcu_constructor include/linux/rcupdate.h:1216 [inline]
#2: ffffffff8fd5a420 (rcu_read_lock){....}-{1:3}, at: unwind_next_frame+0x8f/0x2550 arch/x86/kernel/unwind_orc.c:495
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:123
nmi_trigger_cpumask_backtrace+0x17d/0x390 lib/nmi_backtrace.c:66
trigger_all_cpu_backtrace include/linux/nmi.h:164 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:377 [inline]
watchdog+0x1073/0x10f0 kernel/hung_task.c:598
kthread+0x38b/0x480 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 12035 Comm: syz.6.1392 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/16/2026
RIP: 0010:do_anonymous_page include/linux/leafops.h:-1 [inline]
RIP: 0010:do_pte_missing+0x2b57/0x3570 mm/memory.c:4760
Code: 18 00 49 8b 7f 60 e8 f8 c6 d1 09 e8 f3 d1 ff ff 4c 89 e7 e8 0b 02 fe ff be 00 02 00 00 4c 89 ff e9 02 f0 ff ff e8 49 b1 a2 ff <48> 8b 5c 24 18 48 b8 00 00 00 00 00 fc ff df 41 80 3c 06 00 74 08
RSP: 0000:ffffc9000807fb48 EFLAGS: 00000246
RAX: ffffffff82260d5a RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc90003cdb000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: 1ffff9200100ffb7 R08: ffff88801cb16017 R09: 1ffff11003962c02
R10: dffffc0000000000 R11: ffffed1003962c03 R12: 8000000000000025
R13: 800000000c1ae225 R14: 1ffff1100fcd8e7a R15: 00007ff5a2b07000
FS: 00007ff5a71f66c0(0000) GS:ffff888123b8b000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff5a2b07000 CR3: 00000000791fa000 CR4: 00000000003526f0
Call Trace:
handle_pte_fault mm/memory.c:6648 [inline]
__handle_mm_fault mm/memory.c:6797 [inline]
handle_mm_fault+0x1a2a/0x3540 mm/memory.c:6964
do_user_addr_fault+0xb35/0x1480 arch/x86/mm/fault.c:1343
handle_page_fault arch/x86/mm/fault.c:1483 [inline]
exc_page_fault+0x6a/0xc0 arch/x86/mm/fault.c:1536
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7ff5a8e5534e
Code: c1 49 39 4f 08 72 54 8d 4d ff 85 ed 74 3b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 39 f0 72 1b 4d 8b 07 49 89 c1 49 29 f1 <47> 0f b6 0c 08 45 84 c9 74 08 45 88 0c 00 49 8b 47 10 48 83 c0 01
RSP: 002b:00007ff5a71f5470 EFLAGS: 00010206
RAX: 0000000003f07001 RBX: 00007ff5a71f5530 RCX: 00000000000000b1
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00007ff5a71f55d0
RBP: 0000000000000102 R08: 00007ff59ec00000 R09: 0000000003f07000
R10: 0000000000000000 R11: 00007ff5a71f5540 R12: 0000000000000001
R13: 00007ff5a9055e20 R14: 0000000000000000 R15: 00007ff5a71f55d0