INFO: task syz.2.16:479 blocked for more than 122 seconds.
      Not tainted 6.16.0-rc3-syzkaller-g78f4e737a53e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.16        state:D stack:0     pid:479   tgid:477   ppid:467    task_flags:0x400040 flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5396 [inline]
 __schedule+0xfd2/0x1c60 kernel/sched/core.c:6785
 __schedule_loop kernel/sched/core.c:6863 [inline]
 schedule+0xe0/0x280 kernel/sched/core.c:6878
 super_lock+0x14f/0x300 fs/super.c:115
 __iterate_supers+0x132/0x600 fs/super.c:923
 iterate_supers+0x23/0x40 fs/super.c:939
 ksys_sync+0x94/0x150 fs/sync.c:102
 __ia32_sys_sync+0x12/0x20 fs/sync.c:113
 x64_sys_call+0x2e02/0x2f80 arch/x86/include/generated/asm/syscalls_64.h:163
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x62/0x160 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7fa8e658e929
RSP: 002b:00007fa8e7435038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fa8e67b6080 RCX: 00007fa8e658e929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fa8e67b6080 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fa8e67b6080 R15: 00007ffc03b7d0f8
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.16.0-rc3-syzkaller-g78f4e737a53e #0 PREEMPT  7992dfdd0a84237d5d771d7335e92d2e66a949bc
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x10b/0x180 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2bd/0x2d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x142/0x2c0 lib/nmi_backtrace.c:62
 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:41
 trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
 watchdog+0x1043/0x1090 kernel/hung_task.c:470
 kthread+0x6f7/0x880 kernel/kthread.c:464
 ret_from_fork+0x147/0x1f0 arch/x86/kernel/process.c:148
 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: 0 Comm: swapper/0 Not tainted 6.16.0-rc3-syzkaller-g78f4e737a53e #0 PREEMPT  7992dfdd0a84237d5d771d7335e92d2e66a949bc
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:pv_native_safe_halt+0x17/0x20 arch/x86/kernel/paravirt.c:82
Code: cc cc cc b8 0f b4 1f 0e 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 63 a3 13 00 f3 0f 1e fa 55 48 89 e5 fb f4 <5d> e9 53 63 02 00 cc cc cc b8 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff87007d80 EFLAGS: 000002c6
RAX: ffff88826e785000 RBX: ffffffff870174c0 RCX: ffffffff8593b09e
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000037ca4
RBP: ffffffff87007d80 R08: ffff8881f6e34383 R09: 1ffff1103edc6870
R10: dffffc0000000000 R11: ffffed103edc6871 R12: 1ffffffff0e02e98
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff87a6d0b0
FS:  0000000000000000(0000) GS:ffff88826e785000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560c29087be0 CR3: 000000010b394000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x17/0x30 arch/x86/kernel/process.c:749
 arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:786
 default_idle_call+0x3f/0x80 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:185 [inline]
 do_idle+0x19c/0x470 kernel/sched/idle.c:325
 cpu_startup_entry+0x48/0x70 kernel/sched/idle.c:423
 rest_init+0x10b/0x130 init/main.c:745
 start_kernel+0x46a/0x4bb init/main.c:1102
 x86_64_start_reservations+0x28/0x30 arch/x86/kernel/head64.c:307
 x86_64_start_kernel+0x147/0x1cb arch/x86/kernel/head64.c:288
 common_startup_64+0x13b/0x157
 </TASK>