Extracting prog: 4m39.92402352s
Minimizing prog: 1h30m54.237283554s
Simplifying prog options: 12m31.216815796s
Extracting C: 2m19.184428761s
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:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program crashed: INFO: rcu detected stall in corrupted
single: successfully extracted reproducer
found reproducer with 10 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
ioctl$KVM_CAP_HYPERV_SYNIC2(0xffffffffffffffff, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(0xffffffffffffffff, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(0xffffffffffffffff, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
ioctl$KVM_CREATE_IRQCHIP(0xffffffffffffffff, 0xae60)
r0 = ioctl$KVM_CREATE_VCPU(0xffffffffffffffff, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r0, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r0, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r0, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = ioctl$KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r0, 0xae60)
r1 = ioctl$KVM_CREATE_VCPU(r0, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r1, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r1, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r1, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program crashed: lost connection to test machine
suppressed program crash: lost connection to test machine
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, 0x0, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, 0x0)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, 0x0, 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, 0x0)
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, 0x0)
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
program crashed: INFO: rcu detected stall in kvm_vcpu_ioctl
a never seen crash title: INFO: rcu detected stall in kvm_vcpu_ioctl, ignore
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program crashed: INFO: rcu detected stall in corrupted
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program crashed: INFO: rcu detected stall in netlink_sendmsg
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program crashed: INFO: rcu detected stall in corrupted
validation run: crashed=true
reproducing took 1h59m4.888468235s
repro crashed as (corrupted=true):
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	(detected by 0, t=10502 jiffies, g=15565, q=1082 ncpus=2)
rcu: All QSes seen, last rcu_preempt kthread activity 10502 (4294964269-4294953767), jiffies_till_next_fqs=1, root ->qsmask 0x0
rcu: rcu_preempt kthread starved for 10502 jiffies! g15565 f0x2 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27728 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5258 [inline]
 __schedule+0x150e/0x5070 kernel/sched/core.c:6866
 __schedule_loop kernel/sched/core.c:6948 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6963
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
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 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 0e 21 00 f3 0f 1e fa fb f4 <e9> 48 ee 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90000197de0 EFLAGS: 000002c6
RAX: 729fd05ad82ad300 RBX: ffffffff8197c6ba RCX: 729fd05ad82ad300
RDX: 0000000000000001 RSI: ffffffff8daa9dc3 RDI: ffffffff8be247e0
RBP: ffffc90000197f10 R08: ffff8880b87336db R09: 1ffff110170e66db
R10: dffffc0000000000 R11: ffffed10170e66dc R12: ffffffff8fc3d070
R13: 1ffff11003b53b70 R14: 0000000000000001 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff888125adc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f505804bf98 CR3: 000000002fbc2000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x1ea/0x520 kernel/sched/idle.c:332
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:430
 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312
 common_startup_64+0x13e/0x147
 </TASK>

report is corrupted, running repro again
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_IRQCHIP-ioctl$KVM_CREATE_VCPU-ioctl$KVM_CAP_HYPERV_SYNIC2-ioctl$KVM_SET_MSRS-ioctl$KVM_RUN-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0)
sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7)
r0 = openat$kvm(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_CREATE_IRQCHIP(r1, 0xae60)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_CAP_HYPERV_SYNIC2(r2, 0x4068aea3, &(0x7f0000000140))
ioctl$KVM_SET_MSRS(r2, 0x4008ae89, &(0x7f0000000040)={0x2, 0x0, [{0x400000b0, 0x0, 0x5}, {0x400000b1, 0x0, 0xffffffffffff0001}]})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0)

program crashed: INFO: rcu detected stall in gc_worker
final repro crashed as (corrupted=false):
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: 	Tasks blocked on level-0 rcu_node (CPUs 0-1): P6535/1:b..l
rcu: 	(detected by 0, t=10502 jiffies, g=16085, q=460 ncpus=2)
task:kworker/0:10    state:R  running task     stack:27448 pid:6535  tgid:6535  ppid:2      task_flags:0x4208060 flags:0x00080000
Workqueue: events_power_efficient gc_worker
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5258 [inline]
 __schedule+0x150e/0x5070 kernel/sched/core.c:6866
 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7193
 irqentry_exit+0x5d8/0x660 kernel/entry/common.c:216
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:seqcount_lockdep_reader_access+0x17e/0x1c0 include/linux/seqlock.h:75
Code: f8 4d 85 e4 75 16 e8 91 66 32 f8 eb 15 e8 8a 66 32 f8 e8 35 b0 d7 01 4d 85 e4 74 ea e8 7b 66 32 f8 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3e 00 00 00 00 66 43 c7 44 3e 09 00 00 43 c6 44 3e 0b 00
RSP: 0018:ffffc90004cdf860 EFLAGS: 00000293
RAX: ffffffff898f91e5 RBX: 0000000000000000 RCX: ffff88802ce20000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90004cdf910 R08: ffffffff8fc3d077 R09: 1ffffffff1f87a0e
R10: dffffc0000000000 R11: fffffbfff1f87a0f R12: 0000000000000200
R13: 1ffff110059c4090 R14: 1ffff9200099bf0c R15: dffffc0000000000
 nf_conntrack_get_ht include/net/netfilter/nf_conntrack.h:342 [inline]
 gc_worker+0x308/0x1380 net/netfilter/nf_conntrack_core.c:1548
 process_one_work+0x93a/0x15a0 kernel/workqueue.c:3279
 process_scheduled_works kernel/workqueue.c:3362 [inline]
 worker_thread+0x9b0/0xee0 kernel/workqueue.c:3443
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
rcu: rcu_preempt kthread starved for 10413 jiffies! g16085 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0
rcu: 	Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt     state:R  running task     stack:27128 pid:16    tgid:16    ppid:2      task_flags:0x208040 flags:0x00080000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5258 [inline]
 __schedule+0x150e/0x5070 kernel/sched/core.c:6866
 __schedule_loop kernel/sched/core.c:6948 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6963
 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99
 rcu_gp_fqs_loop+0x301/0x1540 kernel/rcu/tree.c:2083
 rcu_gp_kthread+0x99/0x390 kernel/rcu/tree.c:2285
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
rcu: Stack dump where RCU GP kthread last ran:
CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:pv_native_safe_halt+0x13/0x20 arch/x86/kernel/paravirt.c:82
Code: cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 33 0e 21 00 f3 0f 1e fa fb f4 <e9> 48 ee 02 00 cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffffff8e007d80 EFLAGS: 000002c6
RAX: a553941886c3e400 RBX: ffffffff8197c6ba RCX: a553941886c3e400
RDX: 0000000000000001 RSI: ffffffff8daa9dc3 RDI: ffffffff8be247e0
RBP: ffffffff8e007ea8 R08: ffff8880b86336db R09: 1ffff110170c66db
R10: dffffc0000000000 R11: ffffed10170c66dc R12: ffffffff8fc3d070
R13: 1ffffffff1c129b8 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881259dc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31463fff CR3: 0000000029904000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 arch_safe_halt arch/x86/include/asm/paravirt.h:107 [inline]
 default_idle+0x13/0x20 arch/x86/kernel/process.c:767
 default_idle_call+0x73/0xb0 kernel/sched/idle.c:122
 cpuidle_idle_call kernel/sched/idle.c:191 [inline]
 do_idle+0x1ea/0x520 kernel/sched/idle.c:332
 cpu_startup_entry+0x44/0x60 kernel/sched/idle.c:430
 rest_init+0x2de/0x300 init/main.c:758
 start_kernel+0x3ac/0x400 init/main.c:1208
 x86_64_start_reservations+0x24/0x30 arch/x86/kernel/head64.c:310
 x86_64_start_kernel+0x143/0x1c0 arch/x86/kernel/head64.c:291
 common_startup_64+0x13e/0x147
 </TASK>