INFO: task syz.1.3558:13269 blocked for more than 146 seconds.
      Not tainted 6.17.0-rc1-syzkaller-00199-gdfd4b508c8c6 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.3558      state:D stack:29096 pid:13269 tgid:13264 ppid:5839   task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5357 [inline]
 __schedule+0x1190/0x5de0 kernel/sched/core.c:6961
 __schedule_loop kernel/sched/core.c:7043 [inline]
 schedule+0xe7/0x3a0 kernel/sched/core.c:7058
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7115
 __mutex_lock_common kernel/locking/mutex.c:676 [inline]
 __mutex_lock+0x82a/0x10b0 kernel/locking/mutex.c:760
 tty_open_by_driver drivers/tty/tty_io.c:2037 [inline]
 tty_open+0x53e/0xf90 drivers/tty/tty_io.c:2120
 chrdev_open+0x231/0x6a0 fs/char_dev.c:414
 do_dentry_open+0x982/0x1530 fs/open.c:965
 vfs_open+0x82/0x3f0 fs/open.c:1095
 do_open fs/namei.c:3887 [inline]
 path_openat+0x1de4/0x2cb0 fs/namei.c:4046
 do_filp_open+0x20b/0x470 fs/namei.c:4073
 do_sys_openat2+0x11b/0x1d0 fs/open.c:1435
 do_sys_open fs/open.c:1450 [inline]
 __do_sys_openat fs/open.c:1466 [inline]
 __se_sys_openat fs/open.c:1461 [inline]
 __x64_sys_openat+0x174/0x210 fs/open.c:1461
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f29b858d550
RSP: 002b:00007f29b94d7b70 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007f29b858d550
RDX: 0000000000000002 RSI: 00007f29b94d7c10 RDI: 00000000ffffff9c
RBP: 00007f29b94d7c10 R08: 0000000000000000 R09: 00007f29b94d7987
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000000
R13: 00007f29b87b6038 R14: 00007f29b87b5fa0 R15: 00007ffc541b8ad8
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.17.0-rc1-syzkaller-00199-gdfd4b508c8c6 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline]
 watchdog+0xf0e/0x1260 kernel/hung_task.c:491
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 5895 Comm: kworker/0:3 Not tainted 6.17.0-rc1-syzkaller-00199-gdfd4b508c8c6 #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: wg-kex-wg2 wg_packet_handshake_receive_worker
RIP: 0010:instrument_atomic_read include/linux/instrumented.h:68 [inline]
RIP: 0010:atomic_read include/linux/atomic/atomic-instrumented.h:32 [inline]
RIP: 0010:refcount_read include/linux/refcount.h:170 [inline]
RIP: 0010:skb_shared include/linux/skbuff.h:2065 [inline]
RIP: 0010:skb_share_check include/linux/skbuff.h:2084 [inline]
RIP: 0010:ip6_rcv_core+0x1e4/0x1c30 net/ipv6/ip6_input.c:169
Code: 0f 85 43 17 00 00 48 c7 c7 a0 a3 f5 8c 4d 8b bd b8 03 00 00 e8 7d 02 57 01 48 c7 c7 a0 a3 f5 8c 65 49 ff 47 08 e8 6c 02 57 01 <be> 04 00 00 00 65 49 01 6f 10 48 8d ab e4 00 00 00 48 89 ef e8 33
RSP: 0018:ffffc90000007b18 EFLAGS: 00000282
RAX: 0000000000000000 RBX: ffff8881a3a38c80 RCX: ffffffff8a3c8189
RDX: 1ffff110047e24ff RSI: ffffffff8cf5a3a0 RDI: ffffffff8c162700
RBP: 0000000000000038 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000002c10 R12: ffff88803351d000
R13: ffff888023f12440 R14: ffff888032f66000 R15: 0000607edb56d128
FS:  0000000000000000(0000) GS:ffff8881246bc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f09b02e56c0 CR3: 000000007f275000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 ipv6_rcv+0x7b/0x650 net/ipv6/ip6_input.c:308
 __netif_receive_skb_one_core+0x12d/0x1e0 net/core/dev.c:5979
 __netif_receive_skb+0x1d/0x160 net/core/dev.c:6092
 process_backlog+0x442/0x15e0 net/core/dev.c:6444
 __napi_poll.constprop.0+0xb7/0x550 net/core/dev.c:7494
 napi_poll net/core/dev.c:7557 [inline]
 net_rx_action+0xa9f/0xfe0 net/core/dev.c:7684
 handle_softirqs+0x216/0x8e0 kernel/softirq.c:579
 do_softirq kernel/softirq.c:480 [inline]
 do_softirq+0xb2/0xf0 kernel/softirq.c:467
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x100/0x120 kernel/softirq.c:407
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 fpregs_unlock arch/x86/include/asm/fpu/api.h:77 [inline]
 kernel_fpu_end+0x5e/0x70 arch/x86/kernel/fpu/core.c:479
 blake2s_compress+0x7f/0xe0 lib/crypto/x86/blake2s-glue.c:46
 blake2s_update+0xef/0x360 lib/crypto/blake2s.c:33
 hmac.constprop.0+0x23f/0x420 drivers/net/wireguard/noise.c:324
 kdf.constprop.0+0x1a1/0x280 drivers/net/wireguard/noise.c:375
 derive_keys drivers/net/wireguard/noise.c:397 [inline]
 wg_noise_handshake_begin_session+0x325/0xe80 drivers/net/wireguard/noise.c:838
 wg_packet_send_handshake_response+0x216/0x310 drivers/net/wireguard/send.c:96
 wg_receive_handshake_packet+0x247/0xbf0 drivers/net/wireguard/receive.c:154
 wg_packet_handshake_receive_worker+0x17f/0x3a0 drivers/net/wireguard/receive.c:213
 process_one_work+0x9cc/0x1b70 kernel/workqueue.c:3236
 process_scheduled_works kernel/workqueue.c:3319 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3400
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x5d7/0x6f0 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>