INFO: task syz.4.3035:17913 blocked for more than 143 seconds.
Not tainted 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.3035 state:D stack:27696 pid:17913 tgid:17911 ppid:16447 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
__mutex_lock_common kernel/locking/mutex.c:665 [inline]
__mutex_lock+0x62b/0xa60 kernel/locking/mutex.c:735
nfsd_nl_listener_set_doit+0xe3/0x1b40 fs/nfsd/nfsctl.c:1964
genl_family_rcv_msg_doit+0x202/0x2f0 net/netlink/genetlink.c:1115
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0x565/0x800 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x165/0x410 net/netlink/af_netlink.c:2542
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1321 [inline]
netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1347
netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1891
sock_sendmsg_nosec net/socket.c:711 [inline]
__sock_sendmsg net/socket.c:726 [inline]
____sys_sendmsg+0x9ae/0xb40 net/socket.c:2583
___sys_sendmsg+0x135/0x1e0 net/socket.c:2637
__sys_sendmsg+0x16e/0x220 net/socket.c:2669
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5ddbd85d29
RSP: 002b:00007f5ddcb13038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f5ddbf76080 RCX: 00007f5ddbd85d29
RDX: 0000000020000000 RSI: 0000000020005380 RDI: 0000000000000003
RBP: 00007f5ddbe01aa8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f5ddbf76080 R15: 00007ffe62fd74f8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
3 locks held by kworker/0:3/5836:
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3204
#1: ffffc900040dfd80 (free_ipc_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
#2: ffffffff8ddc6678 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
2 locks held by syz.4.3035/17912:
#0: ffffffff8fb5e390 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e1bb108 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0xe3/0x1b40 fs/nfsd/nfsctl.c:1964
2 locks held by syz.4.3035/17913:
#0: ffffffff8fb5e390 (cb_lock){++++}-{4:4}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8e1bb108 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_nl_listener_set_doit+0xe3/0x1b40 fs/nfsd/nfsctl.c:1964
4 locks held by kworker/u8:20/18423:
#0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3204
#1: ffffc9000d69fd80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
#2: ffffffff8faa9b10 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbb/0xbd0 net/core/net_namespace.c:602
#3: ffffffff8fabfb08 (rtnl_mutex){+.+.}-{4:4}, at: cleanup_net+0x503/0xbd0 net/core/net_namespace.c:638
2 locks held by syz.3.3271/18702:
#0: ffff88803e8ea0e0 (&type->s_umount_key#53){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88803e8ea0e0 (&type->s_umount_key#53){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88803e8ea0e0 (&type->s_umount_key#53){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1bb108 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by syz.2.3617/19890:
#0: ffff88807f8a60e0 (&type->s_umount_key#53){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88807f8a60e0 (&type->s_umount_key#53){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88807f8a60e0 (&type->s_umount_key#53){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
#1: ffffffff8e1bb108 (nfsd_mutex){+.+.}-{4:4}, at: nfsd_shutdown_threads+0x5b/0xf0 fs/nfsd/nfssvc.c:625
2 locks held by getty/20399:
#0: ffff88814d8520a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900054462f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
1 lock held by syz.9.3759/20428:
#0: ffffffff8ddc6540 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x48/0x700 kernel/rcu/tree.c:4565
3 locks held by syz.7.3781/20545:
#0: ffffffff8faa9b10 (pernet_ops_rwsem){++++}-{4:4}, at: copy_net_ns+0x292/0x6c0 net/core/net_namespace.c:512
#1: ffffffff8fabfb08 (rtnl_mutex){+.+.}-{4:4}, at: setup_net+0x40b/0x860 net/core/net_namespace.c:384
#2: ffffffff8ddc6678 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329
2 locks held by syz.6.3783/20558:
2 locks held by dhcpcd/20575:
#0: ffff888040d2c408 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
#0: ffff888040d2c408 (&sb->s_type->i_mutex_key#10){+.+.}-{4:4}, at: __sock_release+0x86/0x270 net/socket.c:639
#1: ffffffff8ddc6678 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Call Trace:
__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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:234 [inline]
watchdog+0xf14/0x1240 kernel/hung_task.c:397
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 16457 Comm: kworker/u8:4 Not tainted 6.13.0-rc3-syzkaller-00136-g8faabc041a00 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Workqueue: wg-kex-wg0 wg_packet_handshake_send_worker
RIP: 0010:fmul2+0x44a/0x480 arch/x86/crypto/curve25519-x86_64.c:296
Code: 66 4d 0f 38 f6 dd f3 4c 0f 38 f6 5e 58 66 48 0f 38 f6 c7 f3 48 0f 38 f6 c7 48 0f af c2 49 01 c0 66 4c 0f 38 f6 cf 4c 89 49 28 <66> 4c 0f 38 f6 d7 4c 89 51 30 66 4c 0f 38 f6 df 4c 89 59 38 48 c7
RSP: 0000:ffffc9000b7ef530 EFLAGS: 00000296
RAX: 00000000000001ee RBX: 0000000000000017 RCX: ffffc9000b7ef770
RDX: 0000000000000026 RSI: ffffc9000b7ef610 RDI: 0000000000000000
RBP: ffffc9000b7ef770 R08: 97e6e211ac4224f0 R09: 01f2fee55b1c0db8
R10: ba893ab246728293 R11: f6114241e2944205 R12: ffffc9000b7ef730
R13: 000000000000001a R14: af4b61e8774bc9fe R15: ffffc9000b7ef750
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a8f97aa680 CR3: 000000000db7e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
point_add_and_double+0x205/0x610 arch/x86/crypto/curve25519-x86_64.c:1006
montgomery_ladder.constprop.0+0x328/0x510 arch/x86/crypto/curve25519-x86_64.c:1098
curve25519_ever64 arch/x86/crypto/curve25519-x86_64.c:1252 [inline]
curve25519_arch+0x18b/0x230 arch/x86/crypto/curve25519-x86_64.c:1599
curve25519 include/crypto/curve25519.h:39 [inline]
mix_dh+0xa1/0x150 drivers/net/wireguard/noise.c:411
wg_noise_handshake_create_initiation+0x2e2/0x650 drivers/net/wireguard/noise.c:550
wg_packet_send_handshake_initiation+0x19c/0x360 drivers/net/wireguard/send.c:34
wg_packet_handshake_send_worker+0x1c/0x30 drivers/net/wireguard/send.c:51
process_one_work+0x958/0x1b30 kernel/workqueue.c:3229
process_scheduled_works kernel/workqueue.c:3310 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244