INFO: task syz.1.16845:20152 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.16845     state:D stack:0     pid:20152 tgid:20152 ppid:20077  flags:0x00004006
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
 request_wait_answer fs/fuse/dev.c:476 [inline]
 __fuse_request_send fs/fuse/dev.c:491 [inline]
 __fuse_simple_request+0xdb1/0x1980 fs/fuse/dev.c:586
 fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
 fuse_flush+0x909/0x1d50 fs/fuse/file.c:582
 filp_flush fs/open.c:1550 [inline]
 filp_close+0xc0/0x160 fs/open.c:1563
 __range_close fs/file.c:712 [inline]
 __close_range+0x50e/0x6c0 fs/file.c:769
 __do_sys_close_range fs/open.c:1616 [inline]
 __se_sys_close_range fs/open.c:1613 [inline]
 __x64_sys_close_range+0x7e/0x90 fs/open.c:1613
 x64_sys_call+0x1686/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:437
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f6e7398eba9
RSP: 002b:00007ffd7d3abeb8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007f6e73bd7da0 RCX: 00007f6e7398eba9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f6e73bd7da0 R08: 000000000000020c R09: 0000001e7d3ac1af
R10: 00007f6e73bd7cb0 R11: 0000000000000246 R12: 00000000000ee70f
R13: 00007f6e73bd6090 R14: ffffffffffffffff R15: 00007ffd7d3abfd0
 </TASK>
INFO: task syz.1.16845:20153 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.16845     state:D stack:0     pid:20153 tgid:20152 ppid:20077  flags:0x00004006
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
 request_wait_answer fs/fuse/dev.c:476 [inline]
 __fuse_request_send fs/fuse/dev.c:491 [inline]
 __fuse_simple_request+0xdb1/0x1980 fs/fuse/dev.c:586
 fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
 fuse_flush+0x909/0x1d50 fs/fuse/file.c:582
 filp_flush fs/open.c:1550 [inline]
 filp_close+0xc0/0x160 fs/open.c:1563
 close_files fs/file.c:427 [inline]
 put_files_struct+0x1b5/0x330 fs/file.c:442
 exit_files+0x84/0xa0 fs/file.c:459
 copy_process+0x21f8/0x3220 kernel/fork.c:2678
 kernel_clone+0x23f/0x830 kernel/fork.c:2819
 __do_sys_clone kernel/fork.c:2964 [inline]
 __se_sys_clone kernel/fork.c:2948 [inline]
 __x64_sys_clone+0x18c/0x1f0 kernel/fork.c:2948
 x64_sys_call+0x2b3c/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:57
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f6e7398eba9
RSP: 002b:00007f6e7482bfe8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 00007f6e73bd5fa0 RCX: 00007f6e7398eba9
RDX: 0000000000000000 RSI: 0000000000000010 RDI: 498144ee5f62e049
RBP: 00007f6e73a11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000
R13: 00007f6e73bd6038 R14: 00007f6e73bd5fa0 R15: 00007ffd7d3abd58
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 fee5265d319350b22cf00991634aaaf1de34201c
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+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: 282 Comm: syz-executor Not tainted syzkaller #0 fee5265d319350b22cf00991634aaaf1de34201c
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:arch_static_branch arch/x86/include/asm/jump_label.h:36 [inline]
RIP: 0010:static_key_false include/linux/jump_label.h:230 [inline]
RIP: 0010:__perf_sw_enabled include/linux/perf_event.h:1512 [inline]
RIP: 0010:perf_event_task_sched_out include/linux/perf_event.h:1537 [inline]
RIP: 0010:prepare_task_switch kernel/sched/core.c:5747 [inline]
RIP: 0010:context_switch kernel/sched/core.c:5892 [inline]
RIP: 0010:__schedule+0x1023/0x1df0 kernel/sched/core.c:7791
Code: 08 4c 89 f7 e8 7e 09 4f fc 4d 01 3e 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 65 09 4f fc 48 ff 03 4c 8b 64 24 08 <0f> 1f 44 00 00 49 bf 00 00 00 00 00 fc ff df 0f 1f 44 00 00 e9 2f
RSP: 0018:ffffc9000114f9e0 EFLAGS: 00000046
RAX: ffff88810ea48018 RBX: ffff8881f6e50618 RCX: dffffc0000000000
RDX: dffffc0000000000 RSI: 0000000000000000 RDI: ffff8881f6e50640
RBP: ffffc9000114fb78 R08: ffffffff87320357 R09: 1ffffffff0e6406a
R10: dffffc0000000000 R11: fffffbfff0e6406b R12: ffffffff87215540
R13: dffffc0000000000 R14: ffff8881f6e4fa00 R15: ffff88810ea48568
FS:  000055556c124500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb850fa4198 CR3: 000000010b6b6000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 __schedule_loop kernel/sched/core.c:7872 [inline]
 schedule+0xc6/0x240 kernel/sched/core.c:7887
 do_nanosleep+0x164/0x590 kernel/time/hrtimer.c:2094
 hrtimer_nanosleep+0x13e/0x320 kernel/time/hrtimer.c:2142
 common_nsleep+0x93/0xb0 kernel/time/posix-timers.c:1373
 __do_sys_clock_nanosleep kernel/time/posix-timers.c:1419 [inline]
 __se_sys_clock_nanosleep+0x300/0x390 kernel/time/posix-timers.c:1396
 __x64_sys_clock_nanosleep+0x9f/0xc0 kernel/time/posix-timers.c:1396
 x64_sys_call+0x2554/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:231
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f61705c1423
Code: 1f 84 00 00 00 00 00 83 ff 03 74 7b 83 ff 02 b8 fa ff ff ff 49 89 ca 0f 44 f8 80 3d 3e 71 1e 00 00 74 14 b8 e6 00 00 00 0f 05 <f7> d8 c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec 28 48 89 54 24 10
RSP: 002b:00007ffe4e2f5128 EFLAGS: 00000202 ORIG_RAX: 00000000000000e6
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f61705c1423
RDX: 00007ffe4e2f5140 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 00000000258508a6 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000202 R12: 00007ffe4e2f5590
R13: 0000000000000004 R14: 00007ffe4e2f517c R15: 00007ffe4e2f5210
 </TASK>