INFO: task syz.0.866:9002 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.866 state:D stack:25424 pid:9002 ppid:5788 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5380 [inline]
__schedule+0x14d2/0x44d0 kernel/sched/core.c:6699
schedule+0xbd/0x170 kernel/sched/core.c:6773
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6832
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x6b7/0xcc0 kernel/locking/mutex.c:747
blkdev_get_by_dev+0x121/0x600 block/bdev.c:788
swsusp_check+0x5b/0x390 kernel/power/swap.c:1525
software_resume+0x4d/0x2e0 kernel/power/hibernate.c:958
resume_store+0x2f2/0x450 kernel/power/hibernate.c:1216
kernfs_fop_write_iter+0x3b6/0x520 fs/kernfs/file.c:352
call_write_iter include/linux/fs.h:2018 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x43b/0x940 fs/read_write.c:584
ksys_write+0x147/0x250 fs/read_write.c:637
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f889858eec9
RSP: 002b:00007f889942a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f88987e6180 RCX: 00007f889858eec9
RDX: 0000000000000012 RSI: 0000200000000000 RDI: 0000000000000007
RBP: 00007f8898611f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f88987e6218 R14: 00007f88987e6180 R15: 00007ffc7536c888
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff8cd2ff20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
2 locks held by getty/5553:
#0: ffff888030fb20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000326e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x425/0x1380 drivers/tty/n_tty.c:2217
5 locks held by kworker/0:3/5823:
1 lock held by udevd/6508:
#0: ffff8880218fa4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x121/0x600 block/bdev.c:788
2 locks held by kworker/u4:13/7924:
6 locks held by syz.0.866/9002:
#0: ffff88802deff4c8 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x2a3/0x330 fs/file.c:1040
#1: ffff88807e4d8418 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x20e/0x940 fs/read_write.c:580
#2: ffff888079f14c88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1e7/0x520 fs/kernfs/file.c:343
#3: ffff888142e716d0 (kn->active#64){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:80 [inline]
#3: ffff888142e716d0 (kn->active#64){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x23a/0x520 fs/kernfs/file.c:344
#4: ffffffff8cbe3988 (system_transition_mutex){+.+.}-{3:3}, at: software_resume+0x43/0x2e0 kernel/power/hibernate.c:957
#5: ffff8880218fa4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x121/0x600 block/bdev.c:788
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
dump_stack_lvl+0x16c/0x230 lib/dump_stack.c:106
nmi_cpu_backtrace+0x39b/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x2f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf41/0xf80 kernel/hung_task.c:379
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3472 Comm: kworker/u4:10 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: wg-kex-wg2 wg_packet_handshake_send_worker
RIP: 0010:fmul arch/x86/crypto/curve25519-x86_64.c:161 [inline]
RIP: 0010:point_add_and_double arch/x86/crypto/curve25519-x86_64.c:1025 [inline]
RIP: 0010:montgomery_ladder arch/x86/crypto/curve25519-x86_64.c:1098 [inline]
RIP: 0010:curve25519_ever64 arch/x86/crypto/curve25519-x86_64.c:1252 [inline]
RIP: 0010:curve25519_arch+0x2f00/0x5110 arch/x86/crypto/curve25519-x86_64.c:1599
Code: c0 00 00 00 00 c4 e2 8b f6 51 18 f3 4d 0f 38 f6 f5 66 4c 0f 38 f6 f0 48 c7 c0 00 00 00 00 f3 48 0f 38 f6 c2 66 49 0f 38 f6 c0 <48> 8b 56 18 c4 62 bb f6 09 45 31 d2 66 4c 0f 38 f6 47 18 4c 89 47
RSP: 0018:ffffc9000ca87420 EFLAGS: 00000246
RAX: 17460c05625642ac RBX: 38e3c73001768fd7 RCX: ffffc9000ca876b0
RDX: 17460c05625642ab RSI: ffffc9000ca875c0 RDI: ffffc9000ca874c0
RBP: ffffc9000ca87770 R08: 0000000000000000 R09: 1ada72359cd23e0f
R10: d31e817b19759379 R11: 74d33250f302d225 R12: ffffc9000ca874c0
R13: 31c4a5dcdb494449 R14: 3a7a26bddde1f786 R15: ffffc9000ca875c0
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c3d0ee1 CR3: 000000000cb30000 CR4: 00000000003506e0
Call Trace:
curve25519 include/crypto/curve25519.h:39 [inline]
mix_dh drivers/net/wireguard/noise.c:411 [inline]
wg_noise_handshake_create_initiation+0x29a/0x7e0 drivers/net/wireguard/noise.c:550
wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:34 [inline]
wg_packet_handshake_send_worker+0x164/0x310 drivers/net/wireguard/send.c:51
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa45/0x15b0 kernel/workqueue.c:2711
worker_thread+0xa55/0xfc0 kernel/workqueue.c:2792
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293