INFO: task jfsCommit:110 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:jfsCommit state:D
stack:27136 pid:110 tgid:110 ppid:2 task_flags:0x200040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0x15dd/0x52d0 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7008
io_schedule+0x7f/0xd0 kernel/sched/core.c:7835
__lock_metapage fs/jfs/jfs_metapage.c:52 [inline]
lock_metapage+0x1ff/0x400 fs/jfs/jfs_metapage.c:66
__get_metapage+0x49a/0xde0 fs/jfs/jfs_metapage.c:748
diIAGRead+0xce/0x140 fs/jfs/jfs_imap.c:2672
diFree+0x9de/0x2ca0 fs/jfs/jfs_imap.c:959
jfs_evict_inode+0x331/0x440 fs/jfs/inode.c:162
evict+0x61e/0xb10 fs/inode.c:846
txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline]
jfs_lazycommit+0x43d/0xaa0 fs/jfs/jfs_txnmgr.c:2734
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
INFO: task syz-executor:5827 blocked for more than 145 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22368 pid:5827 tgid:5827 ppid:1 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0x15dd/0x52d0 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7008
io_schedule+0x7f/0xd0 kernel/sched/core.c:7835
__lock_metapage fs/jfs/jfs_metapage.c:52 [inline]
lock_metapage+0x1ff/0x400 fs/jfs/jfs_metapage.c:66
__get_metapage+0x49a/0xde0 fs/jfs/jfs_metapage.c:748
diIAGRead fs/jfs/jfs_imap.c:2672 [inline]
diRead+0x1f7/0xb90 fs/jfs/jfs_imap.c:316
jfs_iget+0x89/0x470 fs/jfs/inode.c:35
jfs_lookup+0x220/0x420 fs/jfs/namei.c:1472
__lookup_slow+0x2b7/0x410 fs/namei.c:1916
lookup_slow+0x53/0x70 fs/namei.c:1933
walk_component fs/namei.c:2279 [inline]
lookup_last fs/namei.c:2786 [inline]
path_lookupat+0x3f5/0x8c0 fs/namei.c:2810
filename_lookup+0x256/0x5d0 fs/namei.c:2839
user_path_at+0x40/0x160 fs/namei.c:3618
ksys_umount fs/namespace.c:2062 [inline]
__do_sys_umount fs/namespace.c:2070 [inline]
__se_sys_umount fs/namespace.c:2068 [inline]
__x64_sys_umount+0xf6/0x170 fs/namespace.c:2068
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fabbb19da57
RSP: 002b:00007ffe77d02328 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fabbb19da57
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe77d023e0
RBP: 00007ffe77d023e0 R08: 00007ffe77d033e0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffe77d034d0
R13: 00007fabbb232048 R14: 000000000010113d R15: 00007ffe77d045a0
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e75e5a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8e75e5a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8e75e5a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by jfsCommit/110:
#0: ffff88803b6b0920 (&(imap->im_aglock[index])){+.+.}-{4:4}, at: diFree+0x2e9/0x2ca0 fs/jfs/jfs_imap.c:889
#1: ffff888044171388 (&jfs_ip->rdwrlock/1){.+.+}-{4:4}, at: diFree+0x307/0x2ca0 fs/jfs/jfs_imap.c:894
2 locks held by getty/5581:
#0: ffff888032dee0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5827:
#0: ffff888044172a18 (&type->i_mutex_dir_key#20){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:1043 [inline]
#0: ffff888044172a18 (&type->i_mutex_dir_key#20){++++}-{4:4}, at: lookup_slow+0x46/0x70 fs/namei.c:1932
#1: ffff888044171388 (&jfs_ip->rdwrlock/1){.+.+}-{4:4}, at: diRead+0x121/0xb90 fs/jfs/jfs_imap.c:314
5 locks held by kworker/0:4/5903:
#0: ffff8880202a8148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3251 [inline]
#0: ffff8880202a8148 ((wq_completion)usb_hub_wq){+.+.}-{0:0}, at: process_scheduled_works+0xa52/0x18c0 kernel/workqueue.c:3359
#1: ffffc90004397c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3252 [inline]
#1: ffffc90004397c40 ((work_completion)(&hub->events)){+.+.}-{0:0}, at: process_scheduled_works+0xa8d/0x18c0 kernel/workqueue.c:3359
#2: ffff88802ade31e0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:949 [inline]
#2: ffff88802ade31e0 (&dev->mutex){....}-{4:4}, at: hub_event+0x17f/0x4f30 drivers/usb/core/hub.c:5899
#3: ffff88803507f1e0 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:949 [inline]
#3: ffff88803507f1e0 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x450 drivers/base/dd.c:1068
#4: ffff888021ea91a8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:949 [inline]
#4: ffff888021ea91a8 (&dev->mutex){....}-{4:4}, at: __device_attach+0x88/0x450 drivers/base/dd.c:1068
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:161 [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:346 [inline]
watchdog+0xfd9/0x1030 kernel/hung_task.c:515
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5903 Comm: kworker/0:4 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Workqueue: usb_hub_wq hub_event
RIP: 0010:__lock_acquire+0x2be/0x2cf0 kernel/locking/lockdep.c:5170
Code: 24 18 0f 83 14 28 00 00 48 89 6c 24 28 48 8d 04 ad 00 00 00 00 48 01 e8 89 f1 81 e1 ff 1f 00 00 ba 00 e0 ff ff 41 23 54 c7 20 <09> ca 41 89 54 c7 20 4d 89 44 c7 08 4d 89 4c c7 10 48 8b 94 24 20
RSP: 0018:ffffc90000007cc0 EFLAGS: 00000006
RAX: 0000000000000019 RBX: 0000000000000000 RCX: 0000000000000074
RDX: 00000000000c0000 RSI: 0000000000000074 RDI: 0000000000000000
RBP: 0000000000000005 R08: ffffffff81b2807a R09: ffff8880b8628298
R10: dffffc0000000000 R11: ffffffff81b27f80 R12: 0000000000000000
R13: 0000000000000000 R14: ffff888054b39e80 R15: ffff888054b3a9d8
FS: 0000000000000000(0000) GS:ffff888125454000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b30b17ff8 CR3: 0000000078068000 CR4: 0000000000350ef0
Call Trace:
lock_acquire+0xf0/0x2e0 kernel/locking/lockdep.c:5868
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:132 [inline]
_raw_spin_lock_irqsave+0x40/0x60 kernel/locking/spinlock.c:162
hrtimer_interrupt+0xfa/0x1010 kernel/time/hrtimer.c:1892
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline]
__sysvec_apic_timer_interrupt+0x102/0x460 arch/x86/kernel/apic/apic.c:1062
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0xa1/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:console_trylock_spinning kernel/printk/printk.c:2039 [inline]
RIP: 0010:vprintk_emit+0x45d/0x560 kernel/printk/printk.c:2478
Code: 0f 84 44 ff ff ff e8 52 3f 21 00 fb eb 44 e8 4a 3f 21 00 e8 e5 51 0b 0a 4d 85 f6 74 94 e8 3b 3f 21 00 fb 48 c7 c7 c0 09 75 8e <31> f6 ba 01 00 00 00 31 c9 41 b8 01 00 00 00 45 31 c9 53 e8 6b 16
RSP: 0018:ffffc90004396960 EFLAGS: 00000246
RAX: ffffffff81a480b5 RBX: ffffffff81a47f2f RCX: 0000000000100000
RDX: ffffc9001bfe2000 RSI: 00000000000fffff RDI: ffffffff8e7509c0
RBP: ffffc90004396a10 R08: ffffffff9011dab7 R09: 1ffffffff2023b56
R10: dffffc0000000000 R11: fffffbfff2023b57 R12: 0000000000000000
R13: 000000000000005b R14: 0000000000000200 R15: 1ffff92000872d30
dev_vprintk_emit+0x355/0x420 drivers/base/core.c:4914
dev_printk_emit+0xee/0x140 drivers/base/core.c:4925
_dev_info+0x11e/0x180 drivers/base/core.c:4983
iowarrior_probe+0xd24/0x1240 drivers/usb/misc/iowarrior.c:896
usb_probe_interface+0x668/0xc90 drivers/usb/core/driver.c:396
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x267/0xaf0 drivers/base/dd.c:721
__driver_probe_device+0x18c/0x320 drivers/base/dd.c:863
driver_probe_device+0x4f/0x240 drivers/base/dd.c:893
__device_attach_driver+0x279/0x430 drivers/base/dd.c:1021
bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500
__device_attach+0x2c5/0x450 drivers/base/dd.c:1093
device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1148
bus_probe_device+0x12a/0x220 drivers/base/bus.c:613
device_add+0x7b6/0xb70 drivers/base/core.c:3690
usb_set_configuration+0x1a87/0x2110 drivers/usb/core/message.c:2266
usb_generic_driver_probe+0x8d/0x150 drivers/usb/core/generic.c:250
usb_probe_device+0x1c4/0x3b0 drivers/usb/core/driver.c:291
call_driver_probe drivers/base/dd.c:-1 [inline]
really_probe+0x267/0xaf0 drivers/base/dd.c:721
__driver_probe_device+0x18c/0x320 drivers/base/dd.c:863
driver_probe_device+0x4f/0x240 drivers/base/dd.c:893
__device_attach_driver+0x279/0x430 drivers/base/dd.c:1021
bus_for_each_drv+0x258/0x2f0 drivers/base/bus.c:500
__device_attach+0x2c5/0x450 drivers/base/dd.c:1093
device_initial_probe+0xa1/0xd0 drivers/base/dd.c:1148
bus_probe_device+0x12a/0x220 drivers/base/bus.c:613
device_add+0x7b6/0xb70 drivers/base/core.c:3690
usb_new_device+0xa08/0x16f0 drivers/usb/core/hub.c:2695
hub_port_connect drivers/usb/core/hub.c:5567 [inline]
hub_port_connect_change drivers/usb/core/hub.c:5707 [inline]
port_event drivers/usb/core/hub.c:5871 [inline]
hub_event+0x2a1c/0x4f30 drivers/usb/core/hub.c:5953
process_one_work kernel/workqueue.c:3276 [inline]
process_scheduled_works+0xb6e/0x18c0 kernel/workqueue.c:3359
worker_thread+0xa53/0xfc0 kernel/workqueue.c:3440
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245