INFO: task syz.0.20678:16702 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.20678     state:D stack:25816 pid:16702 tgid:16701 ppid:15823  task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5504 [inline]
 __schedule+0x17d9/0x56c0 kernel/sched/core.c:7228
 __schedule_loop kernel/sched/core.c:7307 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7322
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7379
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x7bf/0x1550 kernel/locking/mutex.c:821
 nfsd_nl_version_get_doit+0x17c/0xd20 fs/nfsd/nfsctl.c:1873
 genl_family_rcv_msg_doit+0x233/0x340 net/netlink/genetlink.c:1114
 genl_family_rcv_msg net/netlink/genetlink.c:1194 [inline]
 genl_rcv_msg+0x614/0x7a0 net/netlink/genetlink.c:1209
 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2556
 genl_rcv+0x28/0x40 net/netlink/genetlink.c:1218
 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
 netlink_unicast+0x7bb/0x940 net/netlink/af_netlink.c:1345
 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1900
 sock_sendmsg_nosec net/socket.c:775 [inline]
 __sock_sendmsg net/socket.c:790 [inline]
 ____sys_sendmsg+0x9b9/0xa20 net/socket.c:2684
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2738
 __sys_sendmsg net/socket.c:2770 [inline]
 __do_sys_sendmsg net/socket.c:2775 [inline]
 __se_sys_sendmsg net/socket.c:2773 [inline]
 __x64_sys_sendmsg+0x1b1/0x290 net/socket.c:2773
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa26d39ce59
RSP: 002b:00007fa26e21b028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fa26d615fa0 RCX: 00007fa26d39ce59
RDX: 0000000020048000 RSI: 0000200000000000 RDI: 0000000000000003
RBP: 00007fa26d432e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa26d616038 R14: 00007fa26d615fa0 R15: 00007ffdf577c898
 </TASK>
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
 watchdog+0xfd7/0x1030 kernel/hung_task.c:561
 kthread+0x388/0x470 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 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: 5609 Comm: syz-executor Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:cfs_rq_min_slice kernel/sched/fair.c:947 [inline]
RIP: 0010:dequeue_entities+0x23e8/0x3bc0 kernel/sched/fair.c:7971
Code: 00 48 8b 9c 24 d0 00 00 00 74 08 48 89 df e8 af e4 99 00 48 8b 03 48 8d 58 f0 48 85 c0 48 0f 44 d8 48 8b 44 24 50 80 3c 28 00 <4c> 8b 74 24 40 74 08 4c 89 f7 e8 89 e4 99 00 4d 8b 36 49 c7 c5 ff
RSP: 0018:ffffc90003a1f890 EFLAGS: 00000046
RAX: 1ffff110170c7613 RBX: ffffe8ffffa88c00 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffff888036093e00 RDI: ffff8880b863b05c
RBP: dffffc0000000000 R08: ffffffff903114f7 R09: 1ffffffff2062201
R10: dffffc0000000000 R11: fffffbfff206229f R12: 0000000000000000
R13: ffff8880b863b040 R14: ffff8880b863b050 R15: ffff888036093e80
FS:  000055555adb3540(0000) GS:ffff88812527b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f10a15ea2f8 CR3: 000000007473c000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 dequeue_task_fair+0xc1/0x3d0 kernel/sched/fair.c:8046
 block_task kernel/sched/core.c:2268 [inline]
 try_to_block_task kernel/sched/core.c:6719 [inline]
 __schedule+0x6e1/0x56c0 kernel/sched/core.c:7136
 __schedule_loop kernel/sched/core.c:7307 [inline]
 schedule+0x164/0x360 kernel/sched/core.c:7322
 do_nanosleep+0x21e/0x6a0 kernel/time/hrtimer.c:2399
 hrtimer_nanosleep+0x18f/0x3a0 kernel/time/hrtimer.c:2445
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1406 [inline]
 __se_sys_clock_nanosleep+0x35b/0x3b0 kernel/time/posix-timers.c:1383
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd725357fd7
Code: 48 89 fa 4c 89 df e8 a8 56 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffe29a5bce0 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 000055555adb3540 RCX: 00007fd725357fd7
RDX: 00007ffe29a5bd20 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007ffe29a5c200 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000004
R13: 00007ffe29a5bd5c R14: 00007ffe29a5bdf0 R15: 0000000000000000
 </TASK>