INFO: task jbd2/sda1-8:4915 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:jbd2/sda1-8 state:D stack:24496 pid:4915 tgid:4915 ppid:2 task_flags:0x240040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5583 [inline]
__schedule+0x171d/0x56e0 kernel/sched/core.c:7382
__schedule_loop kernel/sched/core.c:7459 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7474
io_schedule+0x80/0xe0 kernel/sched/core.c:8146
bit_wait_io+0x13/0x110 kernel/sched/wait_bit.c:258
__wait_on_bit+0xac/0x2f0 kernel/sched/wait_bit.c:52
out_of_line_wait_on_bit+0x13b/0x190 kernel/sched/wait_bit.c:67
wait_on_buffer include/linux/buffer_head.h:482 [inline]
jbd2_journal_commit_transaction+0x2f77/0x5cb0 fs/jbd2/commit.c:834
kjournald2+0x3bc/0x740 fs/jbd2/journal.c:200
kthread+0x38b/0x470 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
Showing all locks held in the system:
locks held by khungtaskd/39: 1, last CPU#1:
#0: ffffffff8f3c1f00 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
#0: ffffffff8f3c1f00 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8f3c1f00 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6871
locks held by getty/5344: 2, on CPU#0:
#0: ffff8880346880a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900044eb2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x460/0x1360 drivers/tty/n_tty.c:2211
locks held by syz.0.3626/20411: 1, on CPU#1:
#0: ffff8880388040e0 (&type->s_umount_key#33){++++}-{4:4}, at: __super_lock fs/super.c:62 [inline]
#0: ffff8880388040e0 (&type->s_umount_key#33){++++}-{4:4}, at: super_lock+0x2d1/0x3d0 fs/super.c:124
locks held by syz.7.3645/20552: 1, on CPU#1:
#0: ffff8880388040e0 (&type->s_umount_key#33){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
#0: ffff8880388040e0 (&type->s_umount_key#33){++++}-{4:4}, at: super_lock+0x284/0x3d0 fs/super.c:124
locks held by syz.8.3658/20613: 1, on CPU#0:
#0: ffff8880388040e0 (&type->s_umount_key#33){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
#0: ffff8880388040e0 (&type->s_umount_key#33){++++}-{4:4}, at: super_lock+0x284/0x3d0 fs/super.c:124
locks held by syz.5.3677/20702: 1, on CPU#1:
#0: ffff8880388040e0 (&type->s_umount_key#33){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
#0: ffff8880388040e0 (&type->s_umount_key#33){++++}-{4:4}, at: super_lock+0x284/0x3d0 fs/super.c:124
locks held by cmp/20750: 1, on CPU#1:
#0: ffff88804077eb80 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
#0: ffff88804077eb80 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_fault+0xa61/0x13c0 mm/filemap.c:3604
locks held by syz.6.3717/20931: 1, on CPU#1:
#0: ffff8880388040e0 (&type->s_umount_key#33){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
#0: ffff8880388040e0 (&type->s_umount_key#33){++++}-{4:4}, at: super_lock+0x284/0x3d0 fs/super.c:124
locks held by syz-executor/21044: 1, on CPU#1:
#0: ffff8880356b27d0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
#0: ffff8880356b27d0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_fault+0x6e0/0x13c0 mm/filemap.c:3585
locks held by syz-executor/21223: 1, on CPU#0:
#0: ffff8880356b27d0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_invalidate_lock_shared include/linux/fs.h:1089 [inline]
#0: ffff8880356b27d0 (mapping.invalidate_lock#2){++++}-{4:4}, at: filemap_fault+0x6e0/0x13c0 mm/filemap.c:3585
locks held by syz.4.3803/21249: 1, on CPU#1:
#0: ffff8880388040e0 (&type->s_umount_key#33){++++}-{4:4}, at: __super_lock fs/super.c:60 [inline]
#0: ffff8880388040e0 (&type->s_umount_key#33){++++}-{4:4}, at: super_lock+0x284/0x3d0 fs/super.c:124
locks held by syz.9.3808/21268: 1, on CPU#1:
#0: ffff888038980178 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#0: ffff888038980178 (&dev->mutex){....}-{4:4}, at: nfc_unregister_rfkill+0x63/0x280 net/nfc/core.c:1165
locks held by syz.9.3808/21270: 4, on CPU#0:
#0: ffffffff90847180 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1217
#1: ffffffff90846f98 (genl_mutex){+.+.}-{4:4}, at: genl_lock net/netlink/genetlink.c:35 [inline]
#1: ffffffff90846f98 (genl_mutex){+.+.}-{4:4}, at: genl_op_lock net/netlink/genetlink.c:60 [inline]
#1: ffffffff90846f98 (genl_mutex){+.+.}-{4:4}, at: genl_rcv_msg+0x10b/0x7a0 net/netlink/genetlink.c:1208
#2: ffff888038980178 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1104 [inline]
#2: ffff888038980178 (&dev->mutex){....}-{4:4}, at: nfc_dev_up+0x3c/0x350 net/nfc/core.c:95
#3: ffff888041688400 (&ndev->req_lock){+.+.}-{4:4}, at: nci_open_device net/nfc/nci/core.c:478 [inline]
#3: ffff888041688400 (&ndev->req_lock){+.+.}-{4:4}, at: nci_dev_up+0xa3/0xdc0 net/nfc/nci/core.c:643
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 39 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
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:353 [inline]
watchdog+0xfd2/0x1030 kernel/hung_task.c:561
kthread+0x38b/0x470 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Tainted: G L syzkaller #0 PREEMPT_{RT,(full)}
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64
Code: 9b 7b 02 e9 93 db 03 00 cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 64 2d 00 fb f4 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90
RSP: 0018:ffffffff8f007ca0 EFLAGS: 00000246
RAX: 00000000013e43b7 RBX: ffffffff819b3450 RCX: 8000000000000001
RDX: 0000000000000001 RSI: ffffffff8dac1d7b RDI: ffffffff8bec6e80
RBP: ffffffff8f007d78 R08: ffff8880b843415b R09: 1ffff1101708682b
R10: dffffc0000000000 R11: ffffed101708682c R12: 0000000000000000
R13: 1ffffffff1e1ee00 R14: 1ffffffff1e00f9c R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8881247ad000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2d215ff8 CR3: 000000002bdb6000 CR4: 00000000003526f0
Call Trace:
arch_safe_halt arch/x86/kernel/process.c:767 [inline]
default_idle+0x9/0x20 arch/x86/kernel/process.c:768
default_idle_call+0x72/0xb0 kernel/sched/idle.c:122
cpuidle_idle_call kernel/sched/idle.c:199 [inline]
do_idle+0x2e0/0x540 kernel/sched/idle.c:355
cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:454
rest_init+0x378/0x3a0 init/main.c:732
start_kernel+0x392/0x3e0 init/main.c:1190
x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
x86_64_start_kernel+0x137/0x1b0 arch/x86/kernel/head64.c:291
common_startup_64+0x13e/0x157