Extracting prog: 4m40.416788218s
Minimizing prog: 1h18m52.948973017s
Simplifying prog options: 0s
Extracting C: 2m23.901831531s
Simplifying C: 19m25.255248333s


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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$KVM_RUN(r2, 0xae80, 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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
ioctl$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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$KVM_RUN(r2, 0xae80, 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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_RUN(r2, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
ioctl$KVM_SET_REGS(0xffffffffffffffff, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(0xffffffffffffffff, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$KVM_RUN(0xffffffffffffffff, 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}}): openat$kvm-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r0 = ioctl$KVM_CREATE_VCPU(0xffffffffffffffff, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r0, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(r0, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$KVM_RUN(r0, 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}}): ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = ioctl$KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)
r1 = ioctl$KVM_CREATE_VCPU(r0, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r1, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(r1, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$KVM_RUN(r1, 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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, 0x0, 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, 0x0)
ioctl$KVM_RUN(r2, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, 0x0, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, 0x0)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$KVM_RUN(r2, 0xae80, 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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
program crashed: INFO: rcu detected stall in corrupted
simplifying C reproducer
testing compiled C 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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
program crashed: INFO: rcu detected stall in corrupted
testing compiled C program (duration=6m0s, {Threaded:false 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}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
program crashed: INFO: rcu detected stall in corrupted
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
program crashed: INFO: rcu detected stall in corrupted
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
program crashed: INFO: rcu detected stall in corrupted
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
program crashed: INFO: rcu detected stall in corrupted
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
program crashed: INFO: rcu detected stall in sys_clone
a never seen crash title: INFO: rcu detected stall in sys_clone, ignore
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$KVM_RUN(r2, 0xae80, 0x0)

program crashed: INFO: rcu detected stall in corrupted
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$KVM_RUN(r2, 0xae80, 0x0)

program crashed: INFO: rcu detected stall in corrupted
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-socket$packet-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-ioctl$KVM_RUN
detailed listing:
executing program 0:
r0 = openat$kvm(0xffffff9c, &(0x7f0000000100), 0x41, 0x0)
r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)
r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0)
ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000600)={[0xf, 0x3, 0xfffffffffffff602, 0x1000000000000002, 0x5, 0x8000000d, 0x9e, 0x5, 0x3, 0xffffffff, 0xffffffffffffffff, 0x1, 0x400000000000d0f, 0x4, 0x2000000000000003, 0x800005], 0x80a0000, 0x104204})
ioctl$KVM_RUN(r2, 0xae80, 0x0)
socket$packet(0x11, 0x3, 0x300)
prlimit64(0x0, 0xe, &(0x7f0000000200)={0x8, 0x8a}, 0x0)
sched_setscheduler(0x0, 0x2, &(0x7f0000000640)=0x2)
prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x1, 0x0)
ioctl$KVM_RUN(r2, 0xae80, 0x0)

program crashed: WARNING in rcu_check_gp_start_stall
validation run: crashed=true
reproducing took 1h53m31.01455706s
repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: kernel/rcu/tree_stall.h:1049 at rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1049, CPU#1: syz.1.18/6062
Modules linked in:
CPU: 1 UID: 0 PID: 6062 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1049
Code: ff ff 48 c7 c7 a0 a5 d3 99 be 04 00 00 00 e8 93 43 80 00 4c 89 f7 b8 01 00 00 00 87 05 45 2d 2b 18 85 c0 0f 85 17 ff ff ff 90 <0f> 0b 90 48 81 ff 40 4c 34 8e 74 47 48 c7 c0 a0 eb c3 8f 48 c1 e8
RSP: 0018:ffffc90000a08b78 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000a06 RCX: ffffffff81a8784d
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8e344c40
RBP: ffffc90000a08e30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff33a74b4 R12: 0000000000002904
R13: 1ffff110170e7762 R14: ffffffff8e344c40 R15: dffffc0000000000
FS:  0000555594491500(0000) GS:ffff888125ade000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000007601a000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 rcu_core+0x6a9/0x1870 kernel/rcu/tree.c:2852
 handle_softirqs+0x27d/0x850 kernel/softirq.c:626
 __do_softirq kernel/softirq.c:660 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:727
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:743
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x16c/0x340 kernel/locking/lockdep.c:5872
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 f4 66 25 11 <48> 3b 44 24 58 0f 85 e5 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc900030674c0 EFLAGS: 00000206
RAX: 8c7a7de273782900 RBX: 0000000000000000 RCX: 8c7a7de273782900
RDX: 0000000021261e00 RSI: ffffffff8dc92d88 RDI: ffffffff8be246e0
RBP: ffffffff81471cbb R08: ffffffff81471cbb R09: ffff88807308d838
R10: dffffc0000000000 R11: fffffbfff1f8776f R12: 0000000000000002
R13: ffff88807308d838 R14: 0000000000000001 R15: 0000000000000246
 srcu_lock_acquire include/linux/srcu.h:185 [inline]
 srcu_read_lock include/linux/srcu.h:277 [inline]
 kvm_vcpu_srcu_read_lock include/linux/kvm_host.h:963 [inline]
 vcpu_enter_guest arch/x86/kvm/x86.c:11455 [inline]
 vcpu_run+0x53aa/0x76b0 arch/x86/kvm/x86.c:11639
 kvm_arch_vcpu_ioctl_run+0x1148/0x1c90 arch/x86/kvm/x86.c:11984
 kvm_vcpu_ioctl+0x99a/0xed0 virt/kvm/kvm_main.c:4492
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2073d8f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe8363cf28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2073fe5fa0 RCX: 00007f2073d8f749
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f2073e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2073fe5fa0 R14: 00007f2073fe5fa0 R15: 0000000000000003
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	9c                   	pushf
   5:	8f 44 24 30          	pop    0x30(%rsp)
   9:	f7 44 24 30 00 02 00 	testl  $0x200,0x30(%rsp)
  10:	00
  11:	0f 85 cd 00 00 00    	jne    0xe4
  17:	f7 44 24 08 00 02 00 	testl  $0x200,0x8(%rsp)
  1e:	00
  1f:	74 01                	je     0x22
  21:	fb                   	sti
  22:	65 48 8b 05 f4 66 25 	mov    %gs:0x112566f4(%rip),%rax        # 0x1125671e
  29:	11
* 2a:	48 3b 44 24 58       	cmp    0x58(%rsp),%rax <-- trapping instruction
  2f:	0f 85 e5 00 00 00    	jne    0x11a
  35:	48 83 c4 60          	add    $0x60,%rsp
  39:	5b                   	pop    %rbx
  3a:	41 5c                	pop    %r12
  3c:	41 5d                	pop    %r13
  3e:	41 5e                	pop    %r14

final repro crashed as (corrupted=false):
------------[ cut here ]------------
WARNING: kernel/rcu/tree_stall.h:1049 at rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1049, CPU#1: syz.1.18/6062
Modules linked in:
CPU: 1 UID: 0 PID: 6062 Comm: syz.1.18 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:rcu_check_gp_start_stall+0x2e4/0x470 kernel/rcu/tree_stall.h:1049
Code: ff ff 48 c7 c7 a0 a5 d3 99 be 04 00 00 00 e8 93 43 80 00 4c 89 f7 b8 01 00 00 00 87 05 45 2d 2b 18 85 c0 0f 85 17 ff ff ff 90 <0f> 0b 90 48 81 ff 40 4c 34 8e 74 47 48 c7 c0 a0 eb c3 8f 48 c1 e8
RSP: 0018:ffffc90000a08b78 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000000a06 RCX: ffffffff81a8784d
RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8e344c40
RBP: ffffc90000a08e30 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffffbfff33a74b4 R12: 0000000000002904
R13: 1ffff110170e7762 R14: ffffffff8e344c40 R15: dffffc0000000000
FS:  0000555594491500(0000) GS:ffff888125ade000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000007601a000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 rcu_core+0x6a9/0x1870 kernel/rcu/tree.c:2852
 handle_softirqs+0x27d/0x850 kernel/softirq.c:626
 __do_softirq kernel/softirq.c:660 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x1f0 kernel/softirq.c:727
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:743
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1056
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:lock_acquire+0x16c/0x340 kernel/locking/lockdep.c:5872
Code: 00 00 00 00 9c 8f 44 24 30 f7 44 24 30 00 02 00 00 0f 85 cd 00 00 00 f7 44 24 08 00 02 00 00 74 01 fb 65 48 8b 05 f4 66 25 11 <48> 3b 44 24 58 0f 85 e5 00 00 00 48 83 c4 60 5b 41 5c 41 5d 41 5e
RSP: 0018:ffffc900030674c0 EFLAGS: 00000206
RAX: 8c7a7de273782900 RBX: 0000000000000000 RCX: 8c7a7de273782900
RDX: 0000000021261e00 RSI: ffffffff8dc92d88 RDI: ffffffff8be246e0
RBP: ffffffff81471cbb R08: ffffffff81471cbb R09: ffff88807308d838
R10: dffffc0000000000 R11: fffffbfff1f8776f R12: 0000000000000002
R13: ffff88807308d838 R14: 0000000000000001 R15: 0000000000000246
 srcu_lock_acquire include/linux/srcu.h:185 [inline]
 srcu_read_lock include/linux/srcu.h:277 [inline]
 kvm_vcpu_srcu_read_lock include/linux/kvm_host.h:963 [inline]
 vcpu_enter_guest arch/x86/kvm/x86.c:11455 [inline]
 vcpu_run+0x53aa/0x76b0 arch/x86/kvm/x86.c:11639
 kvm_arch_vcpu_ioctl_run+0x1148/0x1c90 arch/x86/kvm/x86.c:11984
 kvm_vcpu_ioctl+0x99a/0xed0 virt/kvm/kvm_main.c:4492
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2073d8f749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe8363cf28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2073fe5fa0 RCX: 00007f2073d8f749
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007f2073e13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2073fe5fa0 R14: 00007f2073fe5fa0 R15: 0000000000000003
 </TASK>
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	9c                   	pushf
   5:	8f 44 24 30          	pop    0x30(%rsp)
   9:	f7 44 24 30 00 02 00 	testl  $0x200,0x30(%rsp)
  10:	00
  11:	0f 85 cd 00 00 00    	jne    0xe4
  17:	f7 44 24 08 00 02 00 	testl  $0x200,0x8(%rsp)
  1e:	00
  1f:	74 01                	je     0x22
  21:	fb                   	sti
  22:	65 48 8b 05 f4 66 25 	mov    %gs:0x112566f4(%rip),%rax        # 0x1125671e
  29:	11
* 2a:	48 3b 44 24 58       	cmp    0x58(%rsp),%rax <-- trapping instruction
  2f:	0f 85 e5 00 00 00    	jne    0x11a
  35:	48 83 c4 60          	add    $0x60,%rsp
  39:	5b                   	pop    %rbx
  3a:	41 5c                	pop    %r12
  3c:	41 5d                	pop    %r13
  3e:	41 5e                	pop    %r14