INFO: task syz-executor:7578 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:21256 pid:7578 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5381 [inline]
__schedule+0x1553/0x45a0 kernel/sched/core.c:6700
schedule+0xbd/0x170 kernel/sched/core.c:6774
io_schedule+0x80/0xd0 kernel/sched/core.c:9023
folio_wait_bit_common+0x714/0xfa0 mm/filemap.c:1329
__filemap_get_folio+0xbc/0xbb0 mm/filemap.c:1910
truncate_inode_pages_range+0x46b/0xfb0 mm/truncate.c:401
evict+0x4dd/0x8d0 fs/inode.c:707
dispose_list fs/inode.c:738 [inline]
evict_inodes+0x606/0x6a0 fs/inode.c:792
generic_shutdown_super+0x97/0x2b0 fs/super.c:672
kill_block_super+0x44/0x90 fs/super.c:1660
deactivate_locked_super+0x97/0x100 fs/super.c:481
cleanup_mnt+0x43b/0x4d0 fs/namespace.c:1259
task_work_run+0x1d4/0x260 kernel/task_work.c:245
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3f16d9c117
RSP: 002b:00007ffdc80e02f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f3f16e0471f RCX: 00007f3f16d9c117
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffdc80e03b0
RBP: 00007ffdc80e03b0 R08: 00007ffdc80e13b0 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdc80e1440
R13: 00007f3f16e0471f R14: 000000000006da6c R15: 00007ffdc80e1480
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d131fe0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:334 [inline]
#0: ffffffff8d131fe0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:786 [inline]
#0: ffffffff8d131fe0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x290 kernel/locking/lockdep.c:6633
2 locks held by getty/5531:
#0: ffff88802d9cc0a0 (&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+0x433/0x1390 drivers/tty/n_tty.c:2217
1 lock held by syz-executor/7578:
#0: ffff888059f980e0 (&type->s_umount_key#76){+.+.}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff888059f980e0 (&type->s_umount_key#76){+.+.}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff888059f980e0 (&type->s_umount_key#76){+.+.}-{3:3}, at: deactivate_super+0xa4/0xe0 fs/super.c:513
2 locks held by syz.3.5961/22839:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0x18c/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a6/0x3e0 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+0xf3d/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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 34 Comm: kworker/u4:2 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: wg-kex-wg2 wg_packet_handshake_send_worker
RIP: 0010:fsqr2 arch/x86/crypto/curve25519-x86_64.c:783 [inline]
RIP: 0010:point_add_and_double arch/x86/crypto/curve25519-x86_64.c:1015 [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+0x2228/0x5170 arch/x86/crypto/curve25519-x86_64.c:1599
Code: f6 ef c4 e2 fb f6 4f 10 49 c7 c6 00 00 00 00 45 31 ff f3 4c 0f 38 f6 d0 66 4d 0f 38 f6 c0 f3 4c 0f 38 f6 d9 66 4d 0f 38 f6 c9 49 0f 38 f6 df 66 4d 0f 38 f6 d2 f3 4d 0f 38 f6 ef 66 4d 0f 38
RSP: 0018:ffffc90000aaf420 EFLAGS: 00000246
RAX: 947fa7a96067ed2c RBX: 7ac876725c4cb15d RCX: 0f7d467ae2334d4a
RDX: c8cfa1dcbe24db06 RSI: ffffc90000aaf4c0 RDI: ffffc90000aaf5e0
RBP: ffffc90000aaf770 R08: 99d5b6ee04e3e2f8 R09: df82686cb453ee64
R10: b0943b09d615432b R11: c26f9de0bd3dd149 R12: ffffc90000aaf620
R13: 097c87614819386a R14: 0000000000000000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe73534cf0 CR3: 000000000cf32000 CR4: 00000000003506f0
Call Trace:
curve25519 include/crypto/curve25519.h:39 [inline]
mix_dh drivers/net/wireguard/noise.c:411 [inline]
wg_noise_handshake_create_initiation+0x2d8/0x8d0 drivers/net/wireguard/noise.c:550
wg_packet_send_handshake_initiation drivers/net/wireguard/send.c:34 [inline]
wg_packet_handshake_send_worker+0x18f/0x350 drivers/net/wireguard/send.c:51
process_one_work kernel/workqueue.c:2634 [inline]
process_scheduled_works+0xa5d/0x15d0 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