INFO: task syz.4.7288:9013 blocked for more than 143 seconds.
Tainted: G I 6.16.0-rc3-syzkaller-00346-gafa9a6f4f574 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.7288 state:D stack:28808 pid:9013 tgid:8978 ppid:32387 task_flags:0x400640 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x116a/0x5de0 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6878
schedule_timeout+0x257/0x290 kernel/time/sleep_timeout.c:75
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x2ff/0x4e0 kernel/sched/completion.c:116
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:504 [inline]
do_coredump+0x8fa/0x4f10 fs/coredump.c:686
get_signal+0x22e3/0x26d0 kernel/signal.c:3019
arch_do_signal_or_restart+0x8f/0x790 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x84/0x110 kernel/entry/common.c:111
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x3f6/0x490 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4c92d8e929
RSP: 002b:00007f4c93b1a0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f4c92fb6408 RCX: 00007f4c92d8e929
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f4c92fb640c
RBP: 00007f4c92fb6400 R08: 00007f4c93bc0000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f4c92fb640c
R13: 0000000000000000 R14: 00007ffcfae404e0 R15: 00007ffcfae405c8
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e5c47c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e5c47c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e5c47c0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x36/0x1c0 kernel/locking/lockdep.c:6770
2 locks held by getty/4139:
#0: ffff888031fc40a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc9000c06b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x41b/0x14f0 drivers/tty/n_tty.c:2222
4 locks held by kworker/1:4/7916:
#0: ffff8880b853a418 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:606
#1: ffff888069124018 (&pid_list->lock){-.-.}-{2:2}, at: trace_pid_list_is_set+0x4c/0x150 kernel/trace/pid_list.c:141
#2: ffffffff8e5c4760 (rcu_read_lock_bh){....}-{1:3}, at: local_bh_disable include/linux/bottom_half.h:20 [inline]
#2: ffffffff8e5c4760 (rcu_read_lock_bh){....}-{1:3}, at: rcu_read_lock_bh include/linux/rcupdate.h:892 [inline]
#2: ffffffff8e5c4760 (rcu_read_lock_bh){....}-{1:3}, at: keep_key_fresh drivers/net/wireguard/send.c:129 [inline]
#2: ffffffff8e5c4760 (rcu_read_lock_bh){....}-{1:3}, at: wg_packet_create_data_done drivers/net/wireguard/send.c:259 [inline]
#2: ffffffff8e5c4760 (rcu_read_lock_bh){....}-{1:3}, at: wg_packet_tx_worker+0x237/0x810 drivers/net/wireguard/send.c:276
#3: ffffffff8e5c47c0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#3: ffffffff8e5c47c0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#3: ffffffff8e5c47c0 (rcu_read_lock){....}-{1:3}, at: ip6_input+0x29/0x2f0 net/ipv6/ip6_input.c:490
1 lock held by syz.4.7288/8980:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Tainted: G I 6.16.0-rc3-syzkaller-00346-gafa9a6f4f574 #0 PREEMPT(full)
Tainted: [I]=FIRMWARE_WORKAROUND
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
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:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xf70/0x12c0 kernel/hung_task.c:470
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16 Comm: rcu_preempt Tainted: G I 6.16.0-rc3-syzkaller-00346-gafa9a6f4f574 #0 PREEMPT(full)
Tainted: [I]=FIRMWARE_WORKAROUND
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__schedule+0x119c/0x5de0 kernel/sched/core.c:6662
Code: 48 8b 75 08 8b bd 08 ff ff ff e8 8f c5 0a f6 48 8b b5 88 fe ff ff 48 b8 00 00 00 00 00 fc ff df 48 01 c6 48 c7 06 00 00 00 00 <48> c7 46 08 00 00 00 00 c7 46 10 00 00 00 00 48 8b 45 d0 65 48 2b
RSP: 0018:ffffc900001579d0 EFLAGS: 00000286
RAX: dffffc0000000000 RBX: ffff888027fd8000 RCX: ffffffff818897e1
RDX: 0000000000000000 RSI: fffff5200002af53 RDI: ffffffff8df1eda8
RBP: ffffc90000157b80 R08: 0000000000000000 R09: fffffbfff215050a
R10: ffffffff90a82857 R11: 0000000000000001 R12: 0000000000000000
R13: ffff888027fd8558 R14: ffff88806d9e60c0 R15: ffff8880b853a400
FS: 0000000000000000(0000) GS:ffff88812485f000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056517d9b1168 CR3: 0000000067822000 CR4: 00000000003526f0
Call Trace:
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6878
schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1ea/0xb00 kernel/rcu/tree.c:2054
rcu_gp_kthread+0x270/0x380 kernel/rcu/tree.c:2256
kthread+0x3c5/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245