INFO: task syz.2.211:961 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.211       state:D stack:0     pid:961   tgid:961   ppid:299    flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6060 [inline]
 __schedule+0x1496/0x20b0 kernel/sched/core.c:7880
 __schedule_loop kernel/sched/core.c:7957 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7972
 request_wait_answer fs/fuse/dev.c:477 [inline]
 __fuse_request_send fs/fuse/dev.c:493 [inline]
 __fuse_simple_request+0xda8/0x1a90 fs/fuse/dev.c:588
 fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
 fuse_flush+0xa92/0x1f20 fs/fuse/file.c:602
 filp_flush fs/open.c:1552 [inline]
 filp_close+0xc0/0x160 fs/open.c:1565
 __range_close fs/file.c:726 [inline]
 __close_range+0x344/0x4e0 fs/file.c:796
 __do_sys_close_range fs/open.c:1618 [inline]
 __se_sys_close_range fs/open.c:1615 [inline]
 __x64_sys_close_range+0x7e/0x90 fs/open.c:1615
 x64_sys_call+0x1686/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:437
 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: 0033:0x7f89ddf9e0d9
RSP: 002b:00007ffcb4c561c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007ffcb4c562b0 RCX: 00007f89ddf9e0d9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000000a10c R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2e320000 R11: 0000000000000246 R12: 00007ffcb4c562f0
R13: 00007f89de225fac R14: 000000000000a186 R15: 00007f89de225fa0
 </TASK>
INFO: task syz.3.359:1297 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.359       state:D stack:0     pid:1297  tgid:1297  ppid:297    flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6060 [inline]
 __schedule+0x1496/0x20b0 kernel/sched/core.c:7880
 __schedule_loop kernel/sched/core.c:7957 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7972
 request_wait_answer fs/fuse/dev.c:477 [inline]
 __fuse_request_send fs/fuse/dev.c:493 [inline]
 __fuse_simple_request+0xda8/0x1a90 fs/fuse/dev.c:588
 fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
 fuse_flush+0xa92/0x1f20 fs/fuse/file.c:602
 filp_flush fs/open.c:1552 [inline]
 filp_close+0xc0/0x160 fs/open.c:1565
 __range_close fs/file.c:726 [inline]
 __close_range+0x344/0x4e0 fs/file.c:796
 __do_sys_close_range fs/open.c:1618 [inline]
 __se_sys_close_range fs/open.c:1615 [inline]
 __x64_sys_close_range+0x7e/0x90 fs/open.c:1615
 x64_sys_call+0x1686/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:437
 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: 0033:0x7f0fb639e0d9
RSP: 002b:00007ffd5c3badc8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007ffd5c3baeb0 RCX: 00007f0fb639e0d9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000000b6cc R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2e420000 R11: 0000000000000246 R12: 00007ffd5c3baef0
R13: 00007f0fb662609c R14: 000000000000b734 R15: 00007f0fb6626090
 </TASK>
INFO: task syz.1.445:1496 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.445       state:D stack:0     pid:1496  tgid:1496  ppid:293    flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6060 [inline]
 __schedule+0x1496/0x20b0 kernel/sched/core.c:7880
 __schedule_loop kernel/sched/core.c:7957 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7972
 request_wait_answer fs/fuse/dev.c:477 [inline]
 __fuse_request_send fs/fuse/dev.c:493 [inline]
 __fuse_simple_request+0xda8/0x1a90 fs/fuse/dev.c:588
 fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
 fuse_flush+0xa92/0x1f20 fs/fuse/file.c:602
 filp_flush fs/open.c:1552 [inline]
 filp_close+0xc0/0x160 fs/open.c:1565
 __range_close fs/file.c:726 [inline]
 __close_range+0x344/0x4e0 fs/file.c:796
 __do_sys_close_range fs/open.c:1618 [inline]
 __se_sys_close_range fs/open.c:1615 [inline]
 __x64_sys_close_range+0x7e/0x90 fs/open.c:1615
 x64_sys_call+0x1686/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:437
 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: 0033:0x7fbbead9e0d9
RSP: 002b:00007ffe5d06a608 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007ffe5d06a6f0 RCX: 00007fbbead9e0d9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000000caba R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b2e220000 R11: 0000000000000246 R12: 00007ffe5d06a730
R13: 00007fbbeb025fac R14: 000000000000cb24 R15: 00007fbbeb025fa0
 </TASK>
INFO: task syz.4.474:1572 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.474       state:D stack:0     pid:1572  tgid:1572  ppid:1500   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6060 [inline]
 __schedule+0x1496/0x20b0 kernel/sched/core.c:7880
 __schedule_loop kernel/sched/core.c:7957 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7972
 request_wait_answer fs/fuse/dev.c:477 [inline]
 __fuse_request_send fs/fuse/dev.c:493 [inline]
 __fuse_simple_request+0xda8/0x1a90 fs/fuse/dev.c:588
 fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
 fuse_flush+0xa92/0x1f20 fs/fuse/file.c:602
 filp_flush fs/open.c:1552 [inline]
 filp_close+0xc0/0x160 fs/open.c:1565
 __range_close fs/file.c:726 [inline]
 __close_range+0x344/0x4e0 fs/file.c:796
 __do_sys_close_range fs/open.c:1618 [inline]
 __se_sys_close_range fs/open.c:1615 [inline]
 __x64_sys_close_range+0x7e/0x90 fs/open.c:1615
 x64_sys_call+0x1686/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:437
 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: 0033:0x7f434879e0d9
RSP: 002b:00007ffe29021fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007ffe29022090 RCX: 00007f434879e0d9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000000e968 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b31b20000 R11: 0000000000000246 R12: 00007ffe290220d0
R13: 00007f4348a25fac R14: 000000000000e9d2 R15: 00007f4348a25fa0
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 67f5df147bfe8fe71cdb2f404f013e40b3f12e05
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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+0xe45/0xf90 kernel/hung_task.c:423
 kthread+0x2c7/0x360 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 syzkaller #0 67f5df147bfe8fe71cdb2f404f013e40b3f12e05
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:116
Code: cc cc cc cc cc cc cc b8 20 cc 59 21 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 23 19 43 00 55 48 89 e5 fb f4 <5d> c3 cc cc cc cc cc cc cc cc cc cc cc b8 00 00 00 00 90 90 90 90
RSP: 0018:ffffc900001a7e00 EFLAGS: 000002c2
RAX: ffff8881f6f00000 RBX: ffff888103669300 RCX: ffffffff85a444fd
RDX: 0000000000000001 RSI: 0000000000000004 RDI: 0000000000640fd4
RBP: ffffc900001a7e00 R08: ffff8881f6f395eb R09: 1ffff1103ede72bd
R10: dffffc0000000000 R11: ffffed103ede72be R12: 0000000000000000
R13: 1ffff110206cd260 R14: dffffc0000000000 R15: ffffffff87ecbfa8
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f716bdeb7c0 CR3: 0000000121b6e000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:-1 [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+0x3e/0x80 kernel/sched/idle.c:117
 cpuidle_idle_call kernel/sched/idle.c:193 [inline]
 do_idle+0x2fc/0x570 kernel/sched/idle.c:346
 cpu_startup_entry+0x47/0x60 kernel/sched/idle.c:445
 start_secondary+0x12e/0x140 arch/x86/kernel/smpboot.c:314
 common_startup_64+0x13b/0x157
 </TASK>