INFO: task syz.2.17:380 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.17        state:D stack:0     pid:380   tgid:380   ppid:370    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: 0033:0x7f9a2ce4f927
RSP: 002b:00007ffc3b8f55a0 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 000000000000000b RCX: 000000000001e078
RDX: 00007ffc3b8f55c0 RSI: 00007ffc3b8f56f0 RDI: 000000000000000b
RBP: 00007f9a2d1c7da0 R08: 000000002af877ff R09: 7fffffffffffffff
R10: 0000000000000001 R11: 0000000000000000 R12: 000000000001e655
R13: 00007f9a2d1c6090 R14: ffffffffffffffff R15: 00007ffc3b9f3260
 </TASK>
INFO: task syz.3.18:395 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.18        state:D stack:0     pid:395   tgid:395   ppid:385    flags:0x00000004
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: 0033:0x7f4b29e4f927
RSP: 002b:00007ffd5e782220 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 000000000000000b RCX: 0000000000021ef8
RDX: 00007ffd5e782240 RSI: 00007ffd5e782370 RDI: 000000000000000b
RBP: 00007f4b2a1c7da0 R08: 00000000001cc6cd R09: 7fffffffffffffff
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000022206
R13: 00007f4b2a1c6090 R14: ffffffffffffffff R15: 00007ffd5e8804b0
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 1976820a860199aae9d2abf4727fc3b97aa7bbea
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+0x2c7/0x370 kernel/kthread.c:389
 ret_from_fork+0x64/0xa0 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 1976820a860199aae9d2abf4727fc3b97aa7bbea
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:read_tsc+0x0/0x20 arch/x86/kernel/tsc.c:1131
Code: a0 00 e9 e7 fe ff ff e8 ae 80 50 04 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 b8 69 e9 ea f6 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 55 48 89 e5 e8 43 0b 4a 00 0f 01 f9 66 90 48 c1 e2 20
RSP: 0018:ffffc90000007ec0 EFLAGS: 00000057
RAX: 1ffffffff0e57c6c RBX: ffffffff872be360 RCX: dffffc0000000000
RDX: 0000000000010000 RSI: 0000000000000000 RDI: ffffffff872be360
RBP: ffffc90000007ef0 R08: ffffffff8899b247 R09: 1ffffffff1133648
R10: 0000000000000000 R11: ffffffff813bd8c0 R12: 000000000000388e
R13: 0000003d83d6fc58 R14: 1ffff92000000fe8 R15: 0000000000000006
FS:  0000000000000000(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005555881354a8 CR3: 000000010bf1e000 CR4: 00000000003526b0
Call Trace:
 <IRQ>
 tick_nohz_irq_enter kernel/time/tick-sched.c:1538 [inline]
 tick_irq_enter+0xb4/0x300 kernel/time/tick-sched.c:1566
 irq_enter_rcu+0x63/0xa0 kernel/softirq.c:671
 instr_sysvec_call_function_single arch/x86/kernel/smp.c:266 [inline]
 sysvec_call_function_single+0x72/0x90 arch/x86/kernel/smp.c:266
 </IRQ>
 <TASK>
 asm_sysvec_call_function_single+0x1f/0x30 arch/x86/include/asm/idtentry.h:709
RIP: 0010:pv_native_safe_halt+0x17/0x20 arch/x86/kernel/paravirt.c:106
Code: cc cc cc b8 53 48 10 63 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 93 f1 3a 00 f3 0f 1e fa 55 48 89 e5 fb f4 <5d> c3 cc cc cc cc cc cc cc b8 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff87207da0 EFLAGS: 000002c6
RAX: ffff8881f6e00000 RBX: ffffffff87215540 RCX: ffffffff858c60ae
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000038d74
RBP: ffffffff87207da0 R08: ffff8881f6e39733 R09: 1ffff1103edc72e6
R10: dffffc0000000000 R11: ffffed103edc72e7 R12: 1ffffffff0e42aa8
R13: 0000000000000000 R14: 0000000000000000 R15: ffffffff87cb0c28
 arch_safe_halt arch/x86/include/asm/paravirt.h:112 [inline]
 default_idle+0x17/0x30 arch/x86/kernel/process.c:754
 arch_cpu_idle+0xd/0x20 arch/x86/kernel/process.c:791
 default_idle_call+0x3f/0x80 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:185 [inline]
 do_idle+0x1a0/0x470 kernel/sched/idle.c:326
 cpu_startup_entry+0x48/0x70 kernel/sched/idle.c:424
 rest_init+0x10b/0x130 init/main.c:748
 start_kernel+0x46a/0x4bb init/main.c:1135
 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>