INFO: task syz.1.2437:7600 blocked for more than 122 seconds.
      Not tainted 6.12.38-syzkaller-ge76cff4952af #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2437      state:D stack:0     pid:7600  tgid:7600  ppid:288    flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5945 [inline]
 __schedule+0x1322/0x1df0 kernel/sched/core.c:7791
 __schedule_loop kernel/sched/core.c:7872 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:7887
 schedule_timeout+0xb2/0x3a0 kernel/time/timer.c:2595
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common kernel/sched/completion.c:116 [inline]
 wait_for_common+0x359/0x630 kernel/sched/completion.c:127
 wait_for_completion_state+0x19/0x40 kernel/sched/completion.c:264
 coredump_wait fs/coredump.c:419 [inline]
 do_coredump+0x7cf/0x2bd0 fs/coredump.c:581
 get_signal+0x11fd/0x14f0 kernel/signal.c:2918
 arch_do_signal_or_restart+0x96/0x720 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 irqentry_exit_to_user_mode+0x4e/0xb0 kernel/entry/common.c:231
 irqentry_exit+0x16/0x60 kernel/entry/common.c:334
 exc_page_fault+0x66/0xc0 arch/x86/mm/fault.c:1542
 asm_exc_page_fault+0x2b/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f1b4364f927
RSP: 002b:00007ffec3d062e0 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 000000000000000b RCX: ffffffffffffffa8
RDX: 00007ffec3d06300 RSI: 00007ffec3d06430 RDI: 000000000000000b
RBP: 0000000000000032 R08: 7fffffffffffffff R09: 00000013c3e04cef
R10: 00007ffec3e04af0 R11: 0000000000000246 R12: 00007f1b439b609c
R13: 00007ffec3e04af0 R14: 000000000002dd3f R15: 00007ffec3e04b10
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted 6.12.38-syzkaller-ge76cff4952af #0 0c4cbfa3f69dd82e55a5deb21a3f6a6c9f878492
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
 dump_stack+0x19/0x20 lib/dump_stack.c:129
 nmi_cpu_backtrace+0x2bf/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+0xd8f/0xed0 kernel/hung_task.c:423
 kthread+0x2ca/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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted 6.12.38-syzkaller-ge76cff4952af #0 0c4cbfa3f69dd82e55a5deb21a3f6a6c9f878492
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:tick_nohz_idle_stop_tick+0x7b/0x9f0 kernel/time/tick-sched.c:1215
Code: 81 48 8d 4c 24 60 48 c1 e9 03 48 b8 f1 f1 f1 f1 01 f3 f3 f3 48 89 4c 24 58 4a 89 04 39 e8 2d 5b 0c 00 65 48 8b 05 4d 91 88 7e <4c> 8d b0 f0 d4 02 00 65 8b 05 a3 6a 8b 7e 89 44 24 14 0f 1f 44 00
RSP: 0018:ffffc900001a7d40 EFLAGS: 00000093
RAX: ffff8881f6f00000 RBX: ffff88810366a600 RCX: ffff88810366a600
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001a7e30 R08: ffffffff87cad56f R09: 1ffffffff0f95aad
R10: dffffc0000000000 R11: fffffbfff0f95aae R12: 1ffff110206cd4c0
R13: 0000000000000001 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555581d804a8 CR3: 0000000108684000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 cpuidle_idle_call kernel/sched/idle.c:183 [inline]
 do_idle+0x19b/0x470 kernel/sched/idle.c:326
 cpu_startup_entry+0x48/0x70 kernel/sched/idle.c:424
 start_secondary+0x12e/0x140 arch/x86/kernel/smpboot.c:314
 common_startup_64+0x13b/0x157
 </TASK>