Extracting prog: 5m5.161378146s
Minimizing prog: 1h27m33.395707275s
Simplifying prog options: 23m5.883523243s
Extracting C: 5m15.487156154s
Simplifying C: 0s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program crashed: INFO: task hung in kvm_gmem_release
single: successfully extracted reproducer
found reproducer with 8 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$KVM_CREATE_GUEST_MEMFD(0xffffffffffffffff, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(0xffffffffffffffff, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = ioctl$KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r0, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r0, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, 0x0, 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, 0x0, 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, 0x0)
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(0x0, 0x0, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program crashed: INFO: task hung in kvm_gmem_release
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:namespace SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program crashed: INFO: task hung in kvm_gmem_release
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program crashed: INFO: task hung in kvm_gmem_release
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program crashed: INFO: task hung in kvm_gmem_release
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-socket-openat-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_GUEST_MEMFD-ppoll-ioctl$KVM_SET_MEMORY_ATTRIBUTES
detailed listing:
executing program 0:
socket$nl_generic(0x10, 0x3, 0x10)
socket(0x10, 0x803, 0x0)
openat(0xffffffffffffff9c, &(0x7f0000000040)='./cgroup.cpu/memory.limit_in_bytes\x00', 0x2, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x1)
ioctl$KVM_CREATE_GUEST_MEMFD(r1, 0xc040aed4, &(0x7f0000000080)={0x1000000})
ppoll(&(0x7f00000000c0)=[{}, {}], 0x20000000000000dc, 0x0, 0x0, 0x0) (async)
ioctl$KVM_SET_MEMORY_ATTRIBUTES(r1, 0x4020aed2, &(0x7f0000000200)={0x10000, 0x1000000, 0x8})

program crashed: INFO: task hung in kvm_gmem_release
validation run: crashed=true
reproducing took 2h11m0.101124965s
repro crashed as (corrupted=false):
INFO: task syz.0.17:5886 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17        state:D stack:25512 pid:5886  tgid:5886  ppid:5771   task_flags:0x400040 flags:0x08080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5526 [inline]
 __schedule+0x17db/0x58f0 kernel/sched/core.c:7276
 __schedule_loop kernel/sched/core.c:7353 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7368
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7425
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x7c1/0x1550 kernel/locking/mutex.c:821
 kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
 __fput+0x418/0xa50 fs/file_table.c:512
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x204/0x770 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:336 [inline]
 __do_fast_syscall_32+0x437/0x6a0 arch/x86/entry/syscall_32.c:294
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f660ec
RSP: 002b:00000000ff830cbc EFLAGS: 00000206 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 000000000000001e
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
locks held by khungtaskd/32: 1, last CPU#0:
 #0: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6871
locks held by getty/5374: 2, on CPU#1:
 #0: ffff88803555b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211
locks held by syz.0.17/5886: 1, on CPU#1:
 #0: ffff8880597c00a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.0.17/5889: 1, last CPU#1:
 #0: ffff8880597c00a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff8880597c00a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625
locks held by syz.1.20/5950: 1, on CPU#1:
 #0: ffff88807ea780a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.1.20/5952: 1, last CPU#1:
 #0: ffff88807ea780a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff88807ea780a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625
locks held by syz.2.21/5991: 1, on CPU#0:
 #0: ffff8880291340a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.2.21/5993: 1, last CPU#0:
 #0: ffff8880291340a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff8880291340a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625
locks held by syz.3.23/6034: 1, on CPU#1:
 #0: ffff88807b7ac0a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.3.23/6036: 1, last CPU#0:
 #0: ffff88807b7ac0a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff88807b7ac0a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625
locks held by syz.4.24/6081: 1, on CPU#0:
 #0: ffff88807ea480a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.4.24/6083: 2, last CPU#1:
 #0: ffff88807ea480a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff88807ea480a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625
 #1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: ieee80211_rx_napi+0xd1/0x3d0 net/mac80211/rx.c:5742
locks held by syz.5.27/6142: 1, on CPU#1:
 #0: ffff888072ba00a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.5.27/6144: 1, last CPU#0:
 #0: ffff888072ba00a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff888072ba00a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625
locks held by syz.6.28/6190: 1, on CPU#1:
 #0: ffff88807090c0a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.6.28/6192: 1, last CPU#0:
 #0: ffff88807090c0a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff88807090c0a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625
locks held by syz.7.29/6246: 1, on CPU#1:
 #0: ffff888032ad40a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.7.29/6248: 1, last CPU#1:
 #0: ffff888032ad40a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff888032ad40a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 32 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:123
 nmi_trigger_cpumask_backtrace+0x17d/0x390 lib/nmi_backtrace.c:66
 trigger_all_cpu_backtrace include/linux/nmi.h:164 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
 watchdog+0xfd7/0x1030 kernel/hung_task.c:561
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6083 Comm: syz.4.24 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__this_cpu_preempt_check+0x0/0x20 lib/smp_processor_id.c:63
Code: f5 48 8b 74 24 20 48 c7 c7 00 9b 6d 8c e8 88 ac 42 f5 e8 23 ab 4d f5 eb ae 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 89 fe 48 c7 c7 80 9a 6d 8c e9 0d ff ff ff cc cc cc
RSP: 0018:ffffc90003d27460 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 8000000000000001
RDX: 0000000000000000 RSI: ffff88807ea4a3d0 RDI: ffffffff8e6fe7fc
RBP: 00000000ffffffff R08: ffffc90003d2755f R09: 0000000000000000
R10: ffffc90003d27548 R11: fffff520007a4eac R12: 0000000000000246
R13: ffff8880314c5dc0 R14: ffff88807ea4a3d0 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888124dd2000(0063) knlGS:00000000f6834b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f71e8c10 CR3: 0000000073d5a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 lockdep_recursion_finish kernel/locking/lockdep.c:470 [inline]
 lock_is_held_type+0xdf/0x150 kernel/locking/lockdep.c:6017
 lock_is_held include/linux/lockdep.h:249 [inline]
 xa_entry include/linux/xarray.h:1227 [inline]
 xas_descend lib/xarray.c:208 [inline]
 xas_load+0x198/0x5a0 lib/xarray.c:246
 __xa_cmpxchg_raw lib/xarray.c:1783 [inline]
 __xa_cmpxchg+0xc3/0x1f0 lib/xarray.c:1769
 xa_cmpxchg include/linux/xarray.h:699 [inline]
 xa_reserve include/linux/xarray.h:1088 [inline]
 kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2577 [inline]
 kvm_vm_ioctl_set_mem_attributes+0x429/0x1600 virt/kvm/kvm_main.c:2625
 kvm_vm_ioctl+0xb33/0xd30 virt/kvm/kvm_main.c:5356
 kvm_vm_compat_ioctl+0x2b1/0x3a0 virt/kvm/kvm_main.c:5480
 __do_compat_sys_ioctl fs/ioctl.c:695 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:638 [inline]
 __ia32_compat_sys_ioctl+0x5ea/0x950 fs/ioctl.c:638
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
 __do_fast_syscall_32+0x27a/0x6a0 arch/x86/entry/syscall_32.c:291
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf705f0ec
Code: 90 85 d2 74 0a 89 ce 81 e6 ff 0f 00 00 89 32 85 c0 74 05 c1 e9 0c 89 08 31 c0 5e 5d c3 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 58 b8
RSP: 002b:00000000f683450c EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 000000004020aed2
RDX: 0000000080000200 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

final repro crashed as (corrupted=false):
INFO: task syz.0.17:5886 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17        state:D stack:25512 pid:5886  tgid:5886  ppid:5771   task_flags:0x400040 flags:0x08080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5526 [inline]
 __schedule+0x17db/0x58f0 kernel/sched/core.c:7276
 __schedule_loop kernel/sched/core.c:7353 [inline]
 schedule+0x164/0x2b0 kernel/sched/core.c:7368
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7425
 __mutex_lock_common kernel/locking/mutex.c:726 [inline]
 __mutex_lock+0x7c1/0x1550 kernel/locking/mutex.c:821
 kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
 __fput+0x418/0xa50 fs/file_table.c:512
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:70 [inline]
 exit_to_user_mode_loop+0x204/0x770 kernel/entry/common.c:101
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:207 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:230 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:336 [inline]
 __do_fast_syscall_32+0x437/0x6a0 arch/x86/entry/syscall_32.c:294
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf7f660ec
RSP: 002b:00000000ff830cbc EFLAGS: 00000206 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 000000000000001e
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Showing all locks held in the system:
locks held by khungtaskd/32: 1, last CPU#0:
 #0: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #0: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6871
locks held by getty/5374: 2, on CPU#1:
 #0: ffff88803555b0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000322b2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211
locks held by syz.0.17/5886: 1, on CPU#1:
 #0: ffff8880597c00a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.0.17/5889: 1, last CPU#1:
 #0: ffff8880597c00a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff8880597c00a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625
locks held by syz.1.20/5950: 1, on CPU#1:
 #0: ffff88807ea780a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.1.20/5952: 1, last CPU#1:
 #0: ffff88807ea780a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff88807ea780a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625
locks held by syz.2.21/5991: 1, on CPU#0:
 #0: ffff8880291340a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.2.21/5993: 1, last CPU#0:
 #0: ffff8880291340a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff8880291340a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625
locks held by syz.3.23/6034: 1, on CPU#1:
 #0: ffff88807b7ac0a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.3.23/6036: 1, last CPU#0:
 #0: ffff88807b7ac0a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff88807b7ac0a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625
locks held by syz.4.24/6081: 1, on CPU#0:
 #0: ffff88807ea480a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.4.24/6083: 2, last CPU#1:
 #0: ffff88807ea480a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff88807ea480a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625
 #1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline]
 #1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #1: ffffffff8ed5c8a0 (rcu_read_lock){....}-{1:3}, at: ieee80211_rx_napi+0xd1/0x3d0 net/mac80211/rx.c:5742
locks held by syz.5.27/6142: 1, on CPU#1:
 #0: ffff888072ba00a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.5.27/6144: 1, last CPU#0:
 #0: ffff888072ba00a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff888072ba00a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625
locks held by syz.6.28/6190: 1, on CPU#1:
 #0: ffff88807090c0a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.6.28/6192: 1, last CPU#0:
 #0: ffff88807090c0a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff88807090c0a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625
locks held by syz.7.29/6246: 1, on CPU#1:
 #0: ffff888032ad40a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_gmem_release+0xdf/0x3e0 virt/kvm/guest_memfd.c:310
locks held by syz.7.29/6248: 1, last CPU#1:
 #0: ffff888032ad40a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2566 [inline]
 #0: ffff888032ad40a0 (&kvm->slots_lock){+.+.}-{4:4}, at: kvm_vm_ioctl_set_mem_attributes+0x33c/0x1600 virt/kvm/kvm_main.c:2625

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 32 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:123
 nmi_trigger_cpumask_backtrace+0x17d/0x390 lib/nmi_backtrace.c:66
 trigger_all_cpu_backtrace include/linux/nmi.h:164 [inline]
 __sys_info lib/sys_info.c:157 [inline]
 sys_info+0x135/0x170 lib/sys_info.c:165
 check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
 watchdog+0xfd7/0x1030 kernel/hung_task.c:561
 kthread+0x38b/0x480 kernel/kthread.c:436
 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6083 Comm: syz.4.24 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__this_cpu_preempt_check+0x0/0x20 lib/smp_processor_id.c:63
Code: f5 48 8b 74 24 20 48 c7 c7 00 9b 6d 8c e8 88 ac 42 f5 e8 23 ab 4d f5 eb ae 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 89 fe 48 c7 c7 80 9a 6d 8c e9 0d ff ff ff cc cc cc
RSP: 0018:ffffc90003d27460 EFLAGS: 00000046
RAX: 0000000000000001 RBX: 0000000000000001 RCX: 8000000000000001
RDX: 0000000000000000 RSI: ffff88807ea4a3d0 RDI: ffffffff8e6fe7fc
RBP: 00000000ffffffff R08: ffffc90003d2755f R09: 0000000000000000
R10: ffffc90003d27548 R11: fffff520007a4eac R12: 0000000000000246
R13: ffff8880314c5dc0 R14: ffff88807ea4a3d0 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888124dd2000(0063) knlGS:00000000f6834b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f71e8c10 CR3: 0000000073d5a000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 lockdep_recursion_finish kernel/locking/lockdep.c:470 [inline]
 lock_is_held_type+0xdf/0x150 kernel/locking/lockdep.c:6017
 lock_is_held include/linux/lockdep.h:249 [inline]
 xa_entry include/linux/xarray.h:1227 [inline]
 xas_descend lib/xarray.c:208 [inline]
 xas_load+0x198/0x5a0 lib/xarray.c:246
 __xa_cmpxchg_raw lib/xarray.c:1783 [inline]
 __xa_cmpxchg+0xc3/0x1f0 lib/xarray.c:1769
 xa_cmpxchg include/linux/xarray.h:699 [inline]
 xa_reserve include/linux/xarray.h:1088 [inline]
 kvm_vm_set_mem_attributes virt/kvm/kvm_main.c:2577 [inline]
 kvm_vm_ioctl_set_mem_attributes+0x429/0x1600 virt/kvm/kvm_main.c:2625
 kvm_vm_ioctl+0xb33/0xd30 virt/kvm/kvm_main.c:5356
 kvm_vm_compat_ioctl+0x2b1/0x3a0 virt/kvm/kvm_main.c:5480
 __do_compat_sys_ioctl fs/ioctl.c:695 [inline]
 __se_compat_sys_ioctl fs/ioctl.c:638 [inline]
 __ia32_compat_sys_ioctl+0x5ea/0x950 fs/ioctl.c:638
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline]
 __do_fast_syscall_32+0x27a/0x6a0 arch/x86/entry/syscall_32.c:291
 do_fast_syscall_32+0x33/0x70 arch/x86/entry/syscall_32.c:316
 entry_SYSENTER_compat_after_hwframe+0x84/0x8e
RIP: 0023:0xf705f0ec
Code: 90 85 d2 74 0a 89 ce 81 e6 ff 0f 00 00 89 32 85 c0 74 05 c1 e9 0c 89 08 31 c0 5e 5d c3 90 0f 1f 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 58 b8
RSP: 002b:00000000f683450c EFLAGS: 00000206 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000007 RCX: 000000004020aed2
RDX: 0000000080000200 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>