Extracting prog: 6m31.392684456s Minimizing prog: 1h39m51.283504587s Simplifying prog options: 13m21.025753636s Extracting C: 5m12.664791682s Simplifying C: 0s extracting reproducer from 1 programs testing a last program of every proc single: executing 1 programs separately with timeout 30s testing program (duration=30s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-open-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) open(&(0x7f0000000040)='.\x00', 0x0, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program did not crash single: failed to extract reproducer 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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-open-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) open(&(0x7f0000000040)='.\x00', 0x0, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program crashed: WARNING in rcu_check_gp_start_stall single: successfully extracted reproducer found reproducer with 12 syscalls minimizing guilty program testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-open-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) open(&(0x7f0000000040)='.\x00', 0x0, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) program did not crash testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-open-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) open(&(0x7f0000000040)='.\x00', 0x0, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program did not crash testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-open-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) open(&(0x7f0000000040)='.\x00', 0x0, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) ioctl$KVM_SET_REGS(0xffffffffffffffff, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(0xffffffffffffffff, 0xae80, 0x0) ioctl$KVM_RUN(0xffffffffffffffff, 0xae80, 0x0) program did not crash testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-open-openat$kvm-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) open(&(0x7f0000000040)='.\x00', 0x0, 0x0) openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r1 = ioctl$KVM_CREATE_VCPU(0xffffffffffffffff, 0xae41, 0x0) ioctl$KVM_SET_REGS(r1, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r1, 0xae80, 0x0) ioctl$KVM_RUN(r1, 0xae80, 0x0) program did not crash testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-open-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) open(&(0x7f0000000040)='.\x00', 0x0, 0x0) r1 = ioctl$KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0) r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0) ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r2, 0xae80, 0x0) ioctl$KVM_RUN(r2, 0xae80, 0x0) program did not crash testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program crashed: INFO: rcu detected stall in gc_worker testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program did not crash testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program did not crash testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program did not crash testing program (duration=6m17.075212932s, {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}}): getpgrp-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: getpgrp(0x0) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r0 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0) r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0) ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r2, 0xae80, 0x0) ioctl$KVM_RUN(r2, 0xae80, 0x0) program did not crash testing program (duration=6m17.075212932s, {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_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: sched_setaffinity(0x0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r0 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0) r2 = ioctl$KVM_CREATE_VCPU(r1, 0xae41, 0x0) ioctl$KVM_SET_REGS(r2, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r2, 0xae80, 0x0) ioctl$KVM_RUN(r2, 0xae80, 0x0) program did not crash testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x0, 0x0) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program did not crash testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, 0x0, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program did not crash testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, 0x0) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program did not crash testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, 0x0, 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program did not crash testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program did not crash extracting C reproducer testing compiled C program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN program crashed: INFO: rcu detected stall in corrupted a never seen crash title: INFO: rcu detected stall in corrupted, ignore simplifying guilty program options testing program (duration=6m17.075212932s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program crashed: WARNING in rcu_check_gp_start_stall extracting C reproducer testing compiled C program (duration=6m17.075212932s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN program crashed: no output from test machine a never seen crash title: no output from test machine, ignore testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program crashed: INFO: rcu detected stall in corrupted a never seen crash title: INFO: rcu detected stall in corrupted, ignore testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program crashed: INFO: rcu detected stall in corrupted validation run: crashed=true testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program crashed: INFO: rcu detected stall in corrupted validation run: crashed=true testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program crashed: INFO: rcu detected stall in corrupted validation run: crashed=true reproducing took 2h13m41.159339301s repro crashed as (corrupted=true): rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: (detected by 1, t=10502 jiffies, g=13837, q=590 ncpus=2) rcu: All QSes seen, last rcu_preempt kthread activity 10503 (4294971481-4294960978), jiffies_till_next_fqs=1, root ->qsmask 0x0 rcu: rcu_preempt kthread starved for 10504 jiffies! g13837 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:28080 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5282 [inline] __schedule+0x14ed/0x5040 kernel/sched/core.c:6894 __schedule_loop kernel/sched/core.c:6976 [inline] schedule+0x165/0x360 kernel/sched/core.c:6991 schedule_timeout+0x12b/0x270 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x301/0x11b0 kernel/rcu/tree.c:2095 rcu_gp_kthread+0x9b/0x2d0 kernel/rcu/tree.c:2297 kthread+0x389/0x480 kernel/kthread.c:467 ret_from_fork+0x510/0xa50 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246 rcu: Stack dump where RCU GP kthread last ran: 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 43 2e 21 00 f3 0f 1e fa fb f4 cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000197e20 EFLAGS: 000002c2 RAX: 00000000001145ad RBX: ffffffff8197561e RCX: 0000000080000001 RDX: 0000000000000001 RSI: ffffffff8dab3e14 RDI: ffffffff8be259e0 RBP: ffffc90000197f10 R08: ffff8880b873375b R09: 1ffff110170e66eb R10: dffffc0000000000 R11: ffffed10170e66ec R12: ffffffff8fc3fd70 R13: 1ffff11003adcb58 R14: 0000000000000001 R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff888125abb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000000040 CR3: 000000001c2f2000 CR4: 00000000003526f0 Call Trace: 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+0x1be/0x4d0 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 report is corrupted, running repro again testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program crashed: INFO: rcu detected stall in corrupted report is corrupted, running repro again testing program (duration=6m17.075212932s, {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}}): getpgrp-sched_setaffinity-prlimit64-sched_setscheduler-prctl$PR_SCHED_CORE-openat$kvm-ioctl$KVM_CREATE_VM-ioctl$KVM_CREATE_VCPU-ioctl$KVM_SET_REGS-ioctl$KVM_RUN-ioctl$KVM_RUN detailed listing: executing program 0: r0 = getpgrp(0x0) sched_setaffinity(r0, 0x8, &(0x7f0000000040)=0x5) prlimit64(0x0, 0xe, &(0x7f0000000100)={0x8, 0x80000100008b}, 0x0) sched_setscheduler(0x0, 0x1, &(0x7f0000000300)=0x7) prctl$PR_SCHED_CORE(0x3e, 0x1, 0x0, 0x2, 0x0) r1 = openat$kvm(0xffffff9c, &(0x7f00000000c0), 0x800, 0x0) r2 = ioctl$KVM_CREATE_VM(r1, 0xae01, 0x0) r3 = ioctl$KVM_CREATE_VCPU(r2, 0xae41, 0x0) ioctl$KVM_SET_REGS(r3, 0x4090ae82, &(0x7f0000000200)={[0xc45, 0x9, 0xfffffffffffffffd, 0x10000000, 0x10000, 0x3, 0x4002004c2, 0x7ff, 0x9, 0x0, 0x400, 0x80, 0x89, 0x0, 0x8, 0x8d], 0x100000, 0x240046}) ioctl$KVM_RUN(r3, 0xae80, 0x0) ioctl$KVM_RUN(r3, 0xae80, 0x0) program crashed: WARNING in rcu_check_gp_start_stall 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#0: syz.1.18/6043 Modules linked in: CPU: 0 UID: 0 PID: 6043 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 80 d5 d5 99 be 04 00 00 00 e8 83 3b 80 00 4c 89 f7 b8 01 00 00 00 87 05 c5 42 2e 18 85 c0 0f 85 17 ff ff ff 90 <0f> 0b 90 48 81 ff 40 3e 34 8e 74 47 48 c7 c0 80 2d c4 8f 48 c1 e8 RSP: 0018:ffffc90000007db8 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000246 RCX: ffffffff81a792ad RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffffffff8e343e40 RBP: ffffc90000007f30 R08: 0000000000000003 R09: 0000000000000004 R10: dffffc0000000000 R11: fffffbfff33abab0 R12: 0000000000002904 R13: dffffc0000000000 R14: ffffffff8e343e40 R15: dffffc0000000000 FS: 0000555575d2e500(0000) GS:ffff8881259bb000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000075b74000 CR4: 00000000003526f0 Call Trace: rcu_core+0x402/0x1060 kernel/rcu/tree.c:2864 handle_softirqs+0x22b/0x7c0 kernel/softirq.c:626 __do_softirq kernel/softirq.c:660 [inline] invoke_softirq kernel/softirq.c:496 [inline] __irq_exit_rcu+0x60/0x150 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 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:vcpu_enter_guest arch/x86/kvm/x86.c:11439 [inline] RIP: 0010:vcpu_run+0x5215/0x7670 arch/x86/kvm/x86.c:11639 Code: 4c 8b a4 24 20 01 00 00 4c 89 e3 48 c1 eb 03 42 0f b6 04 3b 84 c0 0f 85 12 10 00 00 41 c6 04 24 01 e8 2f 9e 81 00 fb 4c 89 f0 <48> c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 48 a4 e0 00 49 ff 06 RSP: 0018:ffffc90002f775c0 EFLAGS: 00000202 RAX: ffff888077a79d08 RBX: 1ffff1100ef4f186 RCX: 0000000080000001 RDX: 0000000000000006 RSI: ffffffff8dab3e14 RDI: ffffffff8be259e0 RBP: ffffc90002f779b0 R08: ffffffff8fc3fd77 R09: 1ffffffff1f87fae R10: dffffc0000000000 R11: fffffbfff1f87faf R12: ffff888077a78c32 R13: ffff888077a78000 R14: ffff888077a79d08 R15: dffffc0000000000 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+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fc29298f749 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:00007ffcdfe28888 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fc292be5fa0 RCX: 00007fc29298f749 RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005 RBP: 00007fc292a13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc292be5fa0 R14: 00007fc292be5fa0 R15: 0000000000000003 ---------------- Code disassembly (best guess): 0: 4c 8b a4 24 20 01 00 mov 0x120(%rsp),%r12 7: 00 8: 4c 89 e3 mov %r12,%rbx b: 48 c1 eb 03 shr $0x3,%rbx f: 42 0f b6 04 3b movzbl (%rbx,%r15,1),%eax 14: 84 c0 test %al,%al 16: 0f 85 12 10 00 00 jne 0x102e 1c: 41 c6 04 24 01 movb $0x1,(%r12) 21: e8 2f 9e 81 00 call 0x819e55 26: fb sti 27: 4c 89 f0 mov %r14,%rax * 2a: 48 c1 e8 03 shr $0x3,%rax <-- trapping instruction 2e: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1) 33: 74 08 je 0x3d 35: 4c 89 f7 mov %r14,%rdi 38: e8 48 a4 e0 00 call 0xe0a485 3d: 49 ff 06 incq (%r14)