INFO: task syz-executor.2:10094 blocked for more than 143 seconds.
Tainted: G W 6.10.0-rc2-next-20240605-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:19952 pid:10094 tgid:10093 ppid:9625 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5192 [inline]
__schedule+0x17e8/0x4a20 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
nfsd_nl_listener_get_doit+0x115/0x5d0 fs/nfsd/nfsctl.c:2124
genl_family_rcv_msg_doit net/netlink/genetlink.c:1115 [inline]
genl_family_rcv_msg net/netlink/genetlink.c:1195 [inline]
genl_rcv_msg+0xb14/0xec0 net/netlink/genetlink.c:1210
netlink_rcv_skb+0x1e3/0x430 net/netlink/af_netlink.c:2564
genl_rcv+0x28/0x40 net/netlink/genetlink.c:1219
netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
netlink_unicast+0x7ea/0x980 net/netlink/af_netlink.c:1361
netlink_sendmsg+0x8db/0xcb0 net/netlink/af_netlink.c:1905
sock_sendmsg_nosec net/socket.c:730 [inline]
__sock_sendmsg+0x221/0x270 net/socket.c:745
____sys_sendmsg+0x525/0x7d0 net/socket.c:2585
___sys_sendmsg net/socket.c:2639 [inline]
__sys_sendmsg+0x2b0/0x3a0 net/socket.c:2668
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7fdfc7cee9
RSP: 002b:00007f7fe09ac0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f7fdfdb3f80 RCX: 00007f7fdfc7cee9
RDX: 0000000000000000 RSI: 0000000020000100 RDI: 000000000000000b
RBP: 00007f7fdfcda6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f7fdfdb3f80 R15: 00007ffe18739f88
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e3344e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e3344e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e3344e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6689
BUG: using smp_processor_id() in preemptible [00000000] code: khungtaskd/30
caller is nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
CPU: 1 PID: 30 Comm: khungtaskd Tainted: G W 6.10.0-rc2-next-20240605-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
__dump_stack lib/dump_stack.c:91 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117
check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49
nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
nbcon_cpu_emergency_flush+0x11/0x190 kernel/printk/nbcon.c:1324
debug_show_all_locks+0x19c/0x2a0 kernel/locking/lockdep.c:6694
check_hung_uninterruptible_tasks kernel/hung_task.c:219 [inline]
watchdog+0xf9a/0x1020 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
2 locks held by getty/4854:
#0: ffff88802af8f0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2211
BUG: using smp_processor_id() in preemptible [00000000] code: khungtaskd/30
caller is nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
CPU: 0 PID: 30 Comm: khungtaskd Tainted: G W 6.10.0-rc2-next-20240605-syzkaller #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
__dump_stack lib/dump_stack.c:91 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117
check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49
nbcon_get_cpu_emergency_nesting+0x15/0x90 kernel/printk/nbcon.c:959
nbcon_cpu_emergency_flush+0x11/0x190 kernel/printk/nbcon.c:1324
debug_show_all_locks+0x19c/0x2a0 kernel/locking/lockdep.c:6694
check_hung_uninterruptible_tasks kernel/hung_task.c:219 [inline]
watchdog+0xf9a/0x1020 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
2 locks held by syz-fuzzer/5087:
#0: ffff8880b953e7d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:560
#1: ffffffff8e3344e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#1: ffffffff8e3344e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#1: ffffffff8e3344e0 (rcu_read_lock){....}-{1:2}, at: __bpf_trace_run kernel/trace/bpf_trace.c:2402 [inline]
#1: ffffffff8e3344e0 (rcu_read_lock){....}-{1:2}, at: bpf_trace_run4+0x244/0x590 kernel/trace/bpf_trace.c:2446
BUG: using smp_processor_id() in preemptible [00000000] code: khungtaskd/30
caller is