INFO: task syz-executor.0:27596 blocked for more than 143 seconds. Not tainted 5.13.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29704 pid:27596 ppid: 10746 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1407 register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1902 raw_init+0x296/0x340 net/can/raw.c:339 can_create+0x27c/0x4d0 net/can/af_can.c:168 __sock_create+0x3de/0x780 net/socket.c:1408 sock_create net/socket.c:1459 [inline] __sys_socketpair+0x1be/0x570 net/socket.c:1559 __do_sys_socketpair net/socket.c:1612 [inline] __se_sys_socketpair net/socket.c:1609 [inline] __x64_sys_socketpair+0x93/0xf0 net/socket.c:1609 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007ff3460e1188 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665d9 RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200003c0 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007fffa61c93cf R14: 00007ff3460e1300 R15: 0000000000022000 INFO: task syz-executor.0:27620 blocked for more than 143 seconds. Not tainted 5.13.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:29592 pid:27620 ppid: 10746 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4339 [inline] __schedule+0x916/0x23e0 kernel/sched/core.c:5147 schedule+0xcf/0x270 kernel/sched/core.c:5226 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x137/0x150 kernel/locking/rwsem.c:1407 register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1902 raw_init+0x296/0x340 net/can/raw.c:339 can_create+0x27c/0x4d0 net/can/af_can.c:168 __sock_create+0x3de/0x780 net/socket.c:1408 sock_create net/socket.c:1459 [inline] __sys_socketpair+0x1be/0x570 net/socket.c:1559 __do_sys_socketpair net/socket.c:1612 [inline] __se_sys_socketpair net/socket.c:1609 [inline] __x64_sys_socketpair+0x93/0xf0 net/socket.c:1609 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007ff34609f188 EFLAGS: 00000246 ORIG_RAX: 0000000000000035 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665d9 RDX: 0000000000000001 RSI: 0000000000000003 RDI: 000000000000001d RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 00000000200003c0 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007fffa61c93cf R14: 00007ff34609f300 R15: 0000000000022000 Showing all locks held in the system: 3 locks held by kworker/u4:3/122: #0: ffff88801244b138 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88801244b138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic64_set include/asm-generic/atomic-instrumented.h:856 [inline] #0: ffff88801244b138 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/asm-generic/atomic-long.h:41 [inline] #0: ffff88801244b138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:617 [inline] #0: ffff88801244b138 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:644 [inline] #0: ffff88801244b138 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x871/0x1600 kernel/workqueue.c:2247 #1: ffffc90000fffda8 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8a5/0x1600 kernel/workqueue.c:2251 #2: ffffffff8d692390 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x9b/0xb10 net/core/net_namespace.c:557 1 lock held by khungtaskd/1643: #0: ffffffff8bf79320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6333 1 lock held by in:imklog/8129: #0: ffff888016a59770 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974 4 locks held by rs:main Q:Reg/8130: 2 locks held by kworker/u4:7/24036: 1 lock held by syz-executor.0/27596: #0: ffffffff8d692390 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1902 1 lock held by syz-executor.0/27620: #0: ffffffff8d692390 (pernet_ops_rwsem){++++}-{3:3}, at: register_netdevice_notifier+0x1e/0x260 net/core/dev.c:1902 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1643 Comm: khungtaskd Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x141/0x1d7 lib/dump_stack.c:120 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xd48/0xfb0 kernel/hung_task.c:294 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 12851 Comm: kworker/u4:12 Not tainted 5.13.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker RIP: 0010:fproduct_sum_scalar_multiplication_ lib/crypto/curve25519-hacl64.c:82 [inline] RIP: 0010:fmul_mul_shift_reduce_ lib/crypto/curve25519-hacl64.c:184 [inline] RIP: 0010:fmul_fmul lib/crypto/curve25519-hacl64.c:200 [inline] RIP: 0010:fmul lib/crypto/curve25519-hacl64.c:436 [inline] RIP: 0010:addanddouble_fmonty lib/crypto/curve25519-hacl64.c:524 [inline] RIP: 0010:ladder_smallloop_cmult_small_loop_step lib/crypto/curve25519-hacl64.c:552 [inline] RIP: 0010:ladder_smallloop_cmult_small_loop_double_step lib/crypto/curve25519-hacl64.c:564 [inline] RIP: 0010:ladder_smallloop_cmult_small_loop lib/crypto/curve25519-hacl64.c:572 [inline] RIP: 0010:ladder_bigloop_cmult_big_loop lib/crypto/curve25519-hacl64.c:585 [inline] RIP: 0010:ladder_cmult.constprop.0+0x38ed/0x4c20 lib/crypto/curve25519-hacl64.c:599 Code: b0 01 00 00 48 89 c8 4c 13 9c 24 b8 01 00 00 48 89 da 4c 03 94 24 d0 01 00 00 4c 13 9c 24 d8 01 00 00 4c 03 94 24 60 01 00 00 <4c> 13 9c 24 68 01 00 00 4c 03 94 24 90 01 00 00 4c 13 9c 24 98 01 RSP: 0018:ffffc90002397030 EFLAGS: 00000206 RAX: 0034fb37590f397d RBX: 0000000000000000 RCX: 0034fb37590f397d RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffc90002397780 RBP: ffffc90002397610 R08: 0015b388aaaf37a7 R09: 0000000000000000 R10: 00105fc678862944 R11: 0000000000000000 R12: 0001d1c0b80ee824 R13: 0005e30626570663 R14: 0007ffffffffffff R15: 005ef7755a06985d FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcfe43af000 CR3: 000000001d5c4000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: curve25519_generic+0x2a4/0x5550 lib/crypto/curve25519-hacl64.c:781 curve25519_base_arch+0x42/0x50 arch/x86/crypto/curve25519-x86_64.c:1400 curve25519_generate_public include/crypto/curve25519.h:55 [inline] wg_noise_handshake_create_initiation+0x26f/0x6a0 drivers/net/wireguard/noise.c:509 wg_packet_send_handshake_initiation+0x187/0x340 drivers/net/wireguard/send.c:34 wg_packet_handshake_send_worker+0x18/0x30 drivers/net/wireguard/send.c:51 process_one_work+0x98d/0x1600 kernel/workqueue.c:2276 worker_thread+0x64c/0x1120 kernel/workqueue.c:2422 kthread+0x3b1/0x4a0 kernel/kthread.c:313 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294