INFO: task syz.5.2401:7733 blocked for more than 122 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.5.2401      state:D stack:0     pid:7733  tgid:7732  ppid:4625   flags:0x00004004
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:6016 [inline]
 __schedule+0x1399/0x1fa0 kernel/sched/core.c:7870
 __schedule_loop kernel/sched/core.c:7951 [inline]
 schedule+0xc5/0x240 kernel/sched/core.c:7966
 super_lock+0x168/0x330 fs/super.c:117
 super_lock_shared fs/super.c:142 [inline]
 iterate_supers+0x8a/0x560 fs/super.c:937
 quota_sync_all fs/quota/quota.c:69 [inline]
 __do_sys_quotactl fs/quota/quota.c:938 [inline]
 __se_sys_quotactl+0x34e/0x7e0 fs/quota/quota.c:917
 __x64_sys_quotactl+0x9f/0xc0 fs/quota/quota.c:917
 x64_sys_call+0x2818/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:180
 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: 0033:0x7f807ad9c819
RSP: 002b:00007f807bc90028 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007f807b015fa0 RCX: 00007f807ad9c819
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff80000100
RBP: 00007f807ae32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f807b016038 R14: 00007f807b015fa0 R15: 00007ffcc98aa2e8
 </TASK>
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 37 Comm: khungtaskd Not tainted syzkaller #0 6df8a48c60291494d9389e53691a3df5daca5615
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
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+0x2c6/0x370 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: 10267 Comm: syz.9.3190 Not tainted syzkaller #0 6df8a48c60291494d9389e53691a3df5daca5615
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__vmcs_readl arch/x86/kvm/vmx/vmx_ops.h:97 [inline]
RIP: 0010:vmcs_readl arch/x86/kvm/vmx/vmx_ops.h:186 [inline]
RIP: 0010:vmx_read_guest_seg_base+0x1bc/0x310 arch/x86/kvm/vmx/vmx.c:850
Code: 00 48 8b 45 d0 48 c1 e0 04 48 8d 98 64 a1 e3 85 48 89 d8 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 08 01 00 00 8b 1b 41 0f 78 de <0f> 86 25 01 00 00 e8 f9 99 59 00 4c 89 e0 48 c1 e8 03 42 80 3c 38
RSP: 0018:ffffc90004036be8 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 000000000000680c RCX: 0000000000080000
RDX: ffffc9001c757000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90004036c30 R08: ffff88811aae2337 R09: 1ffff1102355c466
R10: dffffc0000000000 R11: ffffed102355c467 R12: ffff88811aae3c98
R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  00007f21118f56c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000011fae6000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 vmx_get_segment+0x8a/0x8d0 arch/x86/kvm/vmx/vmx.c:3548
 kvm_get_segment arch/x86/kvm/x86.c:7573 [inline]
 emulator_get_segment+0xd6/0x5a0 arch/x86/kvm/x86.c:8403
 get_segment_selector arch/x86/kvm/emulate.c:633 [inline]
 save_state_to_tss16 arch/x86/kvm/emulate.c:2657 [inline]
 task_switch_16+0xda2/0x1c50 arch/x86/kvm/emulate.c:2729
 emulator_do_task_switch arch/x86/kvm/emulate.c:2966 [inline]
 emulator_task_switch+0xb19/0x12d0 arch/x86/kvm/emulate.c:3005
 kvm_task_switch+0x7a/0x370 arch/x86/kvm/x86.c:11925
 handle_task_switch+0x51e/0x6f0 arch/x86/kvm/vmx/vmx.c:5774
 __vmx_handle_exit arch/x86/kvm/vmx/vmx.c:6597 [inline]
 vmx_handle_exit+0x12c0/0x1b10 arch/x86/kvm/vmx/vmx.c:6614
 vcpu_enter_guest arch/x86/kvm/x86.c:11169 [inline]
 vcpu_run+0x49f7/0x7840 arch/x86/kvm/x86.c:11330
 kvm_arch_vcpu_ioctl_run+0x1167/0x1bd0 arch/x86/kvm/x86.c:11654
 kvm_vcpu_ioctl+0xa48/0x1000 virt/kvm/kvm_main.c:4515
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x135/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 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: 0033:0x7f211099c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f21118f5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2110c15fa0 RCX: 00007f211099c819
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000006
RBP: 00007f2110a32c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2110c16038 R14: 00007f2110c15fa0 R15: 00007ffdadeaa058
 </TASK>