INFO: task syz.5.598:2070 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.598       state:D stack:0     pid:2070  tgid:2069  ppid:1076   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6026 [inline]
 __schedule+0x1399/0x1fa0 kernel/sched/core.c:7880
 __schedule_loop kernel/sched/core.c:7961 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7976
 super_lock+0x168/0x330 fs/super.c:117
 super_lock_shared fs/super.c:142 [inline]
 iterate_supers+0x8a/0x560 fs/super.c:937
 ksys_sync+0xa1/0x170 fs/sync.c:103
 __ia32_sys_sync+0x12/0x20 fs/sync.c:114
 x64_sys_call+0x2a58/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:163
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f390939cdd9
RSP: 002b:00007f390a251028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f3909615fa0 RCX: 00007f390939cdd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f3909615fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3909616038 R14: 00007f3909615fa0 R15: 00007ffe733d68b8
 </TASK>
INFO: task syz.5.598:2071 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.598       state:D
 stack:0     pid:2071  tgid:2069  ppid:1076   flags:0x00000004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6026 [inline]
 __schedule+0x1399/0x1fa0 kernel/sched/core.c:7880
 __schedule_loop kernel/sched/core.c:7961 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7976
 super_lock+0x168/0x330 fs/super.c:117
 super_lock_shared fs/super.c:142 [inline]
 iterate_supers+0x8a/0x560 fs/super.c:937
 ksys_sync+0xa1/0x170 fs/sync.c:103
 __ia32_sys_sync+0x12/0x20 fs/sync.c:114
 x64_sys_call+0x2a58/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:163
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f390939cdd9
RSP: 002b:00007f390a230028 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007f3909616090 RCX: 00007f390939cdd9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f3909616090 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3909616128 R14: 00007f3909616090 R15: 00007ffe733d68b8
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 4fe7cc6f12681e33e5673a6fddc2b9988498c256
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x140/0x1c0 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2ba/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:267 [inline]
 watchdog+0xdad/0xf00 kernel/hung_task.c:423
 kthread+0x2c9/0x370 kernel/kthread.c:389
 ret_from_fork+0x67/0xa0 arch/x86/kernel/process.c:153
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </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 syzkaller #0 4fe7cc6f12681e33e5673a6fddc2b9988498c256
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/18/2026
RIP: 0010:tick_check_broadcast_expired+0xf/0x30 kernel/time/tick-broadcast.c:629
Code: cc cc cc cc cc cc cc cc cc cc cc b8 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 55 48 89 e5 65 8b 05 3d b2 62 7a <48> 63 c8 31 c0 48 0f a3 0d c4 79 1a 03 0f 92 c0 5d c3 cc cc cc cc
RSP: 0018:ffffffff87407dd0 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffffff874156c0 RCX: ffffffff874156c0
RDX: 0000000000000000 RSI: ffffffffffffffed RDI: 0000000000000000
RBP: ffffffff87407dd0 R08: ffffffff87ec462f R09: 1ffffffff0fd88c5
R10: dffffc0000000000 R11: fffffbfff0fd88c6 R12: 1ffffffff0e82ad8
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff87ec4628
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c340522 CR3: 0000000150b3e000 CR4: 00000000003526b0
DR0: 0000000000000006 DR1: 0000000000000000 DR2: 000000007fffdff5
DR3: 0000800000000005 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 do_idle+0x121/0x560 kernel/sched/idle.c:331
 cpu_startup_entry+0x47/0x60 kernel/sched/idle.c:433
 rest_init+0x10b/0x130 init/main.c:760
 start_kernel+0x462/0x4bb init/main.c:1242
 x86_64_start_reservations+0x2e/0x30 arch/x86/kernel/head64.c:507
 x86_64_start_kernel+0x6a/0x7b arch/x86/kernel/head64.c:488
 common_startup_64+0x13b/0x157
 </TASK>