INFO: task syz.1.4052:10173 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.4052      state:D stack:0     pid:10173 tgid:10173 ppid:6229   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6027 [inline]
 __schedule+0x14ce/0x2100 kernel/sched/core.c:7894
 __schedule_loop kernel/sched/core.c:7975 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7990
 request_wait_answer fs/fuse/dev.c:477 [inline]
 __fuse_request_send fs/fuse/dev.c:493 [inline]
 __fuse_simple_request+0xdee/0x1b10 fs/fuse/dev.c:588
 fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
 fuse_flush+0xad9/0x2020 fs/fuse/file.c:602
 filp_flush fs/open.c:1552 [inline]
 filp_close+0xbd/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: 0033:0x7fe79c99ce59
RSP: 002b:00007ffe477a8af8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007fe79cc17da0 RCX: 00007fe79c99ce59
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fe79cc17da0 R08: 0000000000000006 R09: 0000000000000000
R10: 00007fe79cc17cb0 R11: 0000000000000246 R12: 0000000000066a74
R13: 00007fe79cc15fac R14: 00000000000667d0 R15: 00007ffe477a8c00
 </TASK>
INFO: task syz.1.4052:10174 blocked for more than 123 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.4052      state:D stack:0     pid:10174 tgid:10173 ppid:6229   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6027 [inline]
 __schedule+0x14ce/0x2100 kernel/sched/core.c:7894
 __schedule_loop kernel/sched/core.c:7975 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7990
 request_wait_answer fs/fuse/dev.c:477 [inline]
 __fuse_request_send fs/fuse/dev.c:493 [inline]
 __fuse_simple_request+0xdee/0x1b10 fs/fuse/dev.c:588
 fuse_simple_request fs/fuse/fuse_i.h:1248 [inline]
 fuse_flush+0xad9/0x2020 fs/fuse/file.c:602
 filp_flush fs/open.c:1552 [inline]
 filp_close+0xbd/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: 0033:0x7fe79c99ce59
RSP: 002b:00007fe79b3f7028 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007fe79cc15fa0 RCX: 00007fe79c99ce59
RDX: 0000000000000002 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007fe79ca32e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fe79cc16038 R14: 00007fe79cc15fa0 R15: 00007ffe477a8998
 </TASK>
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 471281939cd7bfdfff4c6b6074d5d68627c837ba
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
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 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 16268 Comm: kworker/1:7 Not tainted syzkaller #0 471281939cd7bfdfff4c6b6074d5d68627c837ba
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: events drain_vmap_area_work
RIP: 0010:arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:107 [inline]
RIP: 0010:raw_atomic_try_cmpxchg_acquire include/linux/atomic/atomic-arch-fallback.h:2170 [inline]
RIP: 0010:atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1302 [inline]
RIP: 0010:queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
RIP: 0010:do_raw_spin_lock include/linux/spinlock.h:187 [inline]
RIP: 0010:__raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
RIP: 0010:_raw_spin_lock+0x96/0x120 kernel/locking/spinlock.c:154
Code: 7a 43 c6 44 3c 04 04 c7 44 24 20 00 00 00 00 be 04 00 00 00 e8 3b c7 35 fc 4c 89 f7 be 04 00 00 00 e8 2e c7 35 fc 8b 44 24 20 <b9> 01 00 00 00 f0 0f b1 0b 75 38 43 c6 44 3c 04 f8 48 c7 04 24 0e
RSP: 0018:ffffc90003b97a20 EFLAGS: 00000297
RAX: 0000000000000000 RBX: ffff88810005f080 RCX: ffffffff85aab0e2
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffc90003b97a40
RBP: ffffc90003b97ab0 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000772f48 R12: 1ffff92000772f44
R13: dffffc0000000000 R14: ffffc90003b97a40 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3dc44b5140 CR3: 00000001228c8000 CR4: 00000000003526b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 00000000fda3b69a DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 spin_lock include/linux/spinlock.h:351 [inline]
 node_pool_add_va mm/vmalloc.c:1874 [inline]
 purge_vmap_node+0x701/0x8c0 mm/vmalloc.c:2251
 __purge_vmap_area_lazy+0x614/0x8d0 mm/vmalloc.c:2328
 drain_vmap_area_work+0x29/0x50 mm/vmalloc.c:2362
 process_one_work kernel/workqueue.c:3261 [inline]
 process_scheduled_works+0x7d4/0x1020 kernel/workqueue.c:3342
 worker_thread+0xc51/0x1370 kernel/workqueue.c:3423
 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>