Extracting prog: 24m3.014770438s Minimizing prog: 1h7m12.207120429s Simplifying prog options: 0s Extracting C: 2m57.591121434s Simplifying C: 1h3m32.090205211s extracting reproducer from 35 programs testing a last program of every proc single: executing 10 programs separately with timeout 6m0s testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$can_bcm-ioctl$ifreq_SIOCGIFINDEX_vcan-connect$can_bcm-sendmsg$can_bcm detailed listing: executing program 0: r0 = socket$can_bcm(0x1d, 0x2, 0x2) ioctl$ifreq_SIOCGIFINDEX_vcan(r0, 0x8933, &(0x7f0000000000)={'vcan0\x00', 0x0}) connect$can_bcm(r0, &(0x7f0000000040)={0x1d, r1}, 0x10) sendmsg$can_bcm(r0, &(0x7f00000004c0)={0x0, 0x0, &(0x7f0000000500)={&(0x7f0000000540)={0x1, 0x212, 0xffffffff, {0x77359400}, {0x0, 0x2710}, {}, 0x1, @can={{}, 0x4, 0x2, 0x0, 0x0, "ee6a4130f0506500"}}, 0x48}, 0x1, 0x0, 0x0, 0x4040812}, 0x1) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): syz_open_procfs$pagemap-vmsplice-prctl$PR_SET_MM_MAP-sendmsg$NFT_BATCH-syz_open_dev$vbi-mkdirat-ioctl$VIDIOC_G_INPUT-mount-bpf$PROG_LOAD-openat-setsockopt$sock_int-close-write-socket$nl_route-ioctl$sock_SIOCGIFINDEX-sendmsg$nl_route_sched-socket$inet_tcp-sendmsg$IPSET_CMD_HEADER-bind$inet-connect$inet-sendto$inet-recvfrom$inet-mkdirat-mount-openat-write detailed listing: executing program 0: r0 = syz_open_procfs$pagemap(0x0, &(0x7f0000000180)) vmsplice(r0, &(0x7f0000000240)=[{&(0x7f0000000000)="33b43dd40e580bc037c5b84c3820", 0xe}, {&(0x7f0000000040)="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", 0xfb}, {&(0x7f0000000a00)}], 0x3, 0x12) prctl$PR_SET_MM_MAP(0x23, 0xe, &(0x7f0000000480)={&(0x7f0000ffe000/0x2000)=nil, &(0x7f0000ffb000/0x1000)=nil, &(0x7f0000ffc000/0x4000)=nil, &(0x7f0000ff7000/0x3000)=nil, &(0x7f0000ff8000/0x4000)=nil, &(0x7f0000ffd000/0x1000)=nil, &(0x7f0000ffb000/0x3000)=nil, &(0x7f0000fff000/0x1000)=nil, &(0x7f0000ffd000/0x3000)=nil, &(0x7f0000ffa000/0x1000)=nil, &(0x7f0000ffa000/0x2000)=nil, 0x0}, 0x68) sendmsg$NFT_BATCH(0xffffffffffffffff, 0x0, 0x0) syz_open_dev$vbi(0x0, 0x2, 0x2) mkdirat(0xffffffffffffff9c, &(0x7f0000000540)='./proc\x00', 0x1ff) ioctl$VIDIOC_G_INPUT(0xffffffffffffffff, 0x80045626, &(0x7f0000000140)) mount(0x0, &(0x7f0000000580)='./proc\x00', &(0x7f00000005c0)='proc\x00', 0x0, 0x0) bpf$PROG_LOAD(0x5, &(0x7f00000002c0)={0x10, 0x4, &(0x7f0000000380)=@framed={{}, [@ldst={0x1, 0x2, 0x3, 0x0, 0x1, 0x39}]}, &(0x7f0000000980)='syzkaller\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @sk_msg, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0}, 0x80) r1 = openat(0xffffffffffffff9c, &(0x7f0000000600)='./proc/sys/net/ipv4/tcp_ecn\x00', 0x1, 0x0) setsockopt$sock_int(0xffffffffffffffff, 0x1, 0xf, &(0x7f0000000640)=0x3fa, 0x4) close(0x3) write(r1, &(0x7f0000000680)='3', 0x1) r2 = socket$nl_route(0x10, 0x3, 0x0) ioctl$sock_SIOCGIFINDEX(r2, 0x8933, &(0x7f00000006c0)={'lo\x00', 0x0}) sendmsg$nl_route_sched(r2, &(0x7f0000000700)={0x0, 0x0, &(0x7f0000000740)={&(0x7f0000000780)=@newqdisc={0x4c, 0x24, 0x4ee4e6a52ff56541, 0x40000, 0x25dfdbfb, {0x0, 0x0, 0x0, r3, {}, {0xffff, 0xffff}, {0x3, 0xfff3}}, [@qdisc_kind_options=@q_netem={{0xa}, {0x1c, 0x2, {{0x6, 0x6b7, 0x80, 0x800, 0xffffffff, 0x91b1}}}}]}, 0x4c}, 0x1, 0x0, 0x0, 0x4000400}, 0x800) r4 = socket$inet_tcp(0x2, 0x1, 0x0) sendmsg$IPSET_CMD_HEADER(r1, &(0x7f0000000800)={0x0, 0x0, &(0x7f0000000880)={&(0x7f00000008c0)={0x20, 0xc, 0x6, 0x500, 0x0, 0x0, {0xa, 0x0, 0xa}, [@IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}]}, 0x20}, 0x1, 0x0, 0x0, 0x4000080}, 0x8000) bind$inet(r4, &(0x7f0000000900)={0x2, 0x4e21, @multicast1}, 0x10) connect$inet(r4, &(0x7f0000000940)={0x2, 0x4e21, @dev={0xac, 0x14, 0x14, 0x42}}, 0x10) sendto$inet(r4, &(0x7f0000000980), 0xffffffffffffff94, 0xb, 0x0, 0x0) recvfrom$inet(r4, &(0x7f00000009c0)=""/8, 0xfffffffffffffd0b, 0xc9100120, 0x0, 0xfffffffffffffd25) mkdirat(0xffffffffffffff9c, 0x0, 0x1ff) mount(0x0, &(0x7f0000000440)='./trace/events/kmem/kmalloc/filter\x00', &(0x7f00000003c0)='tracefs\x00', 0x0, 0x0) r5 = openat(0xffffffffffffff9c, &(0x7f0000000400)='./trace/events/kmem/kmalloc/filter\x00', 0x2, 0x0) write(r5, 0x0, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$nl_route-openat$tun-ioctl$TUNSETIFF-socket$inet6_tcp-dup-ioctl$SIOCSIFHWADDR-write$tun detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendmsg$nl_route(r0, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000080)={&(0x7f0000000100)=ANY=[@ANYBLOB="48000000100001060100000000000000000000000000000000000000000000001000030073797a6b616c6c65723000001800128008000100767266000c00028008000100e8"], 0x48}}, 0x0) r1 = openat$tun(0xffffffffffffff9c, &(0x7f0000000240), 0x48241, 0x0) ioctl$TUNSETIFF(r1, 0x400454ca, &(0x7f00000002c0)={'syzkaller1\x00', 0x6bf1c2d5adba8c32}) r2 = socket$inet6_tcp(0xa, 0x1, 0x0) r3 = dup(r2) ioctl$SIOCSIFHWADDR(r3, 0x8914, &(0x7f0000000300)={'syzkaller1\x00', @link_local={0x1, 0x80, 0xc2, 0x0, 0x0, 0x2}}) write$tun(r1, &(0x7f0000000180)={@val, @void, @eth={@multicast, @multicast, @void, {@ipv4={0x800, @udp={{0x5, 0x4, 0x0, 0x0, 0x1c, 0x68, 0x0, 0x3, 0x2f, 0x0, @private=0x1fe1, @multicast1}, {0xa000, 0x6558, 0x8}}}}}}, 0x2e) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-mkdirat-openat-write-prctl$PR_SET_IO_FLUSHER-bpf$BPF_GET_MAP_INFO-openat$iommufd-ioctl$IOMMU_IOAS_ALLOC-ioctl$IOMMU_TEST_OP_MOCK_DOMAIN-socket$inet_udp-mprotect detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000006c0)='./cgroup.cpu/test\x00', 0x777) r1 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0) write(r1, &(0x7f0000000740), 0x0) prctl$PR_SET_IO_FLUSHER(0x39, 0x1) bpf$BPF_GET_MAP_INFO(0xf, 0x0, 0x0) r2 = openat$iommufd(0xffffffffffffff9c, &(0x7f0000000100), 0x0, 0x0) ioctl$IOMMU_IOAS_ALLOC(r2, 0x3b81, &(0x7f0000000140)={0xc, 0x0, 0x0}) ioctl$IOMMU_TEST_OP_MOCK_DOMAIN(r2, 0x3ba0, &(0x7f0000000180)={0x48, 0x2, r3}) socket$inet_udp(0x2, 0x2, 0x0) mprotect(&(0x7f0000000000/0x1000)=nil, 0x1000, 0xd) program crashed: INFO: rcu detected stall in worker_thread single: successfully extracted reproducer found reproducer with 12 syscalls minimizing guilty program testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-mkdirat-openat-write-prctl$PR_SET_IO_FLUSHER-bpf$BPF_GET_MAP_INFO-openat$iommufd-ioctl$IOMMU_IOAS_ALLOC-ioctl$IOMMU_TEST_OP_MOCK_DOMAIN-socket$inet_udp detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000006c0)='./cgroup.cpu/test\x00', 0x777) r1 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0) write(r1, &(0x7f0000000740), 0x0) prctl$PR_SET_IO_FLUSHER(0x39, 0x1) bpf$BPF_GET_MAP_INFO(0xf, 0x0, 0x0) r2 = openat$iommufd(0xffffffffffffff9c, &(0x7f0000000100), 0x0, 0x0) ioctl$IOMMU_IOAS_ALLOC(r2, 0x3b81, &(0x7f0000000140)={0xc, 0x0, 0x0}) ioctl$IOMMU_TEST_OP_MOCK_DOMAIN(r2, 0x3ba0, &(0x7f0000000180)={0x48, 0x2, r3}) socket$inet_udp(0x2, 0x2, 0x0) program crashed: INFO: rcu detected stall in worker_thread testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-mkdirat-openat-write-prctl$PR_SET_IO_FLUSHER-bpf$BPF_GET_MAP_INFO-openat$iommufd-ioctl$IOMMU_IOAS_ALLOC-ioctl$IOMMU_TEST_OP_MOCK_DOMAIN detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000006c0)='./cgroup.cpu/test\x00', 0x777) r1 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0) write(r1, &(0x7f0000000740), 0x0) prctl$PR_SET_IO_FLUSHER(0x39, 0x1) bpf$BPF_GET_MAP_INFO(0xf, 0x0, 0x0) r2 = openat$iommufd(0xffffffffffffff9c, &(0x7f0000000100), 0x0, 0x0) ioctl$IOMMU_IOAS_ALLOC(r2, 0x3b81, &(0x7f0000000140)={0xc, 0x0, 0x0}) ioctl$IOMMU_TEST_OP_MOCK_DOMAIN(r2, 0x3ba0, &(0x7f0000000180)={0x48, 0x2, r3}) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-mkdirat-openat-write-prctl$PR_SET_IO_FLUSHER-bpf$BPF_GET_MAP_INFO-openat$iommufd-ioctl$IOMMU_IOAS_ALLOC-socket$inet_udp detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000006c0)='./cgroup.cpu/test\x00', 0x777) r1 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0) write(r1, &(0x7f0000000740), 0x0) prctl$PR_SET_IO_FLUSHER(0x39, 0x1) bpf$BPF_GET_MAP_INFO(0xf, 0x0, 0x0) r2 = openat$iommufd(0xffffffffffffff9c, &(0x7f0000000100), 0x0, 0x0) ioctl$IOMMU_IOAS_ALLOC(r2, 0x3b81, &(0x7f0000000140)={0xc}) socket$inet_udp(0x2, 0x2, 0x0) program crashed: INFO: rcu detected stall in worker_thread testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-mkdirat-openat-write-prctl$PR_SET_IO_FLUSHER-bpf$BPF_GET_MAP_INFO-openat$iommufd-socket$inet_udp detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000006c0)='./cgroup.cpu/test\x00', 0x777) r1 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0) write(r1, &(0x7f0000000740), 0x0) prctl$PR_SET_IO_FLUSHER(0x39, 0x1) bpf$BPF_GET_MAP_INFO(0xf, 0x0, 0x0) openat$iommufd(0xffffffffffffff9c, &(0x7f0000000100), 0x0, 0x0) socket$inet_udp(0x2, 0x2, 0x0) program crashed: INFO: rcu detected stall in worker_thread testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-mkdirat-openat-write-prctl$PR_SET_IO_FLUSHER-bpf$BPF_GET_MAP_INFO-socket$inet_udp detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000006c0)='./cgroup.cpu/test\x00', 0x777) r1 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0) write(r1, &(0x7f0000000740), 0x0) prctl$PR_SET_IO_FLUSHER(0x39, 0x1) bpf$BPF_GET_MAP_INFO(0xf, 0x0, 0x0) socket$inet_udp(0x2, 0x2, 0x0) program crashed: INFO: rcu detected stall in corrupted testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-mkdirat-openat-write-prctl$PR_SET_IO_FLUSHER-socket$inet_udp detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000006c0)='./cgroup.cpu/test\x00', 0x777) r1 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0) write(r1, &(0x7f0000000740), 0x0) prctl$PR_SET_IO_FLUSHER(0x39, 0x1) socket$inet_udp(0x2, 0x2, 0x0) program crashed: INFO: rcu detected stall in worker_thread testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-mkdirat-openat-write-socket$inet_udp detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000006c0)='./cgroup.cpu/test\x00', 0x777) r1 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0) write(r1, &(0x7f0000000740), 0x0) socket$inet_udp(0x2, 0x2, 0x0) program crashed: INFO: rcu detected stall in corrupted testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-mkdirat-openat-socket$inet_udp detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000006c0)='./cgroup.cpu/test\x00', 0x777) openat(0xffffffffffffff9c, 0x0, 0x2, 0x0) socket$inet_udp(0x2, 0x2, 0x0) program crashed: INFO: rcu detected stall in worker_thread testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-mkdirat-socket$inet_udp detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) mkdirat(0xffffffffffffff9c, &(0x7f00000006c0)='./cgroup.cpu/test\x00', 0x777) socket$inet_udp(0x2, 0x2, 0x0) program crashed: INFO: rcu detected stall in corrupted testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) socket$inet_udp(0x2, 0x2, 0x0) program crashed: INFO: rcu detected stall in worker_thread testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-socket$inet_udp detailed listing: executing program 0: socket$nl_route(0x10, 0x3, 0x0) socket$inet_udp(0x2, 0x2, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): sendto-socket$inet_udp detailed listing: executing program 0: sendto(0xffffffffffffffff, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) socket$inet_udp(0x2, 0x2, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, 0x0, 0x0, 0x0, 0x0, 0x0) socket$inet_udp(0x2, 0x2, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040), 0x0, 0x0, 0x0, 0x0) socket$inet_udp(0x2, 0x2, 0x0) program did not crash extracting C reproducer testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp program crashed: INFO: rcu detected stall in worker_thread simplifying C reproducer testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp 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}}): socket$nl_route-sendto-socket$inet_udp 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: 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}}): socket$nl_route-sendto-socket$inet_udp 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:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp 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:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp 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:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp 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:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp 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:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp 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:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp 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:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp 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:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp 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:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:true IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp 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:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp 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:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:true IEEE802154:true Sysctl:false Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp 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:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp program crashed: INFO: rcu detected stall in corrupted testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) socket$inet_udp(0x2, 0x2, 0x0) program crashed: INFO: rcu detected stall in corrupted validation run: crashed=true testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) socket$inet_udp(0x2, 0x2, 0x0) program crashed: INFO: rcu detected stall in corrupted validation run: crashed=true testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp detailed listing: executing program 0: r0 = socket$nl_route(0x10, 0x3, 0x0) sendto(r0, &(0x7f0000000040)="5c00000030000506000000000000000000000000480001804400018009000100676174650000000034000280180002000000000000000000000000000000000000000000180005801400018008000100000000000800030064000000", 0x5c, 0x0, 0x0, 0x0) socket$inet_udp(0x2, 0x2, 0x0) program crashed: INFO: rcu detected stall in corrupted validation run: crashed=true reproducing took 2h50m18.896398835s repro crashed as (corrupted=true): rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P28/3:b..l.. rcu: (detected by 1, t=10502 jiffies, g=16157, q=895 ncpus=2) task:ktimers/1 state:D stack:24448 pid:28 tgid:28 ppid:2 task_flags:0x4208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5583 [inline] __schedule+0x171d/0x56f0 kernel/sched/core.c:7382 __schedule_loop kernel/sched/core.c:7459 [inline] schedule_rtlock+0x30/0x70 kernel/sched/core.c:7538 rtlock_slowlock_locked+0x35c9/0x3c20 kernel/locking/rtmutex.c:1895 rtlock_slowlock kernel/locking/rtmutex.c:1922 [inline] rtlock_lock kernel/locking/spinlock_rt.c:43 [inline] __rt_spin_lock kernel/locking/spinlock_rt.c:49 [inline] rt_spin_lock+0x165/0x400 kernel/locking/spinlock_rt.c:57 spin_lock_bh include/linux/spinlock_rt.h:90 [inline] cfg80211_inform_single_bss_data+0xc22/0x1bf0 net/wireless/scan.c:2442 cfg80211_inform_bss_data+0x25b/0x3be0 net/wireless/scan.c:3303 cfg80211_inform_bss_frame_data+0x51a/0xae0 net/wireless/scan.c:3399 ieee80211_bss_info_update+0x772/0xa30 net/mac80211/scan.c:236 ieee80211_scan_rx+0x552/0xa40 net/mac80211/scan.c:370 __ieee80211_rx_handle_packet net/mac80211/rx.c:5414 [inline] ieee80211_rx_list+0x4090/0x4c40 net/mac80211/rx.c:5765 ieee80211_rx_napi+0x1ad/0x3d0 net/mac80211/rx.c:5790 ieee80211_rx include/net/mac80211.h:5491 [inline] ieee80211_handle_queued_frames+0xe4/0x1d0 net/mac80211/main.c:452 tasklet_action_common+0x31c/0x600 kernel/softirq.c:995 handle_softirqs+0x1d4/0x6c0 kernel/softirq.c:669 __do_softirq kernel/softirq.c:703 [inline] run_ktimerd+0x6a/0x100 kernel/softirq.c:1208 smpboot_thread_fn+0x5f8/0xb30 kernel/smpboot.c:162 kthread+0x38b/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 rcu: rcu_preempt kthread timer wakeup didn't happen for 10450 jiffies! g16157 f0x0 RCU_GP_WAIT_FQS(5) ->state=I rcu: Possible timer handling issue on cpu=1 timer-softirq=7408 rcu: rcu_preempt kthread starved for 10456 jiffies! g16157 f0x0 RCU_GP_WAIT_FQS(5) ->state=I ->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:I stack:27296 pid:17 tgid:17 ppid:2 task_flags:0x208040 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5583 [inline] __schedule+0x171d/0x56f0 kernel/sched/core.c:7382 __schedule_loop kernel/sched/core.c:7459 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7474 schedule_timeout+0x152/0x2c0 kernel/time/sleep_timeout.c:99 rcu_gp_fqs_loop+0x30c/0x1230 kernel/rcu/tree.c:2122 rcu_gp_kthread+0x9c/0x340 kernel/rcu/tree.c:2330 kthread+0x38b/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 rcu: Stack dump where RCU GP kthread last ran: CPU: 1 UID: 0 PID: 0 Comm: swapper/1 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/15/2026 RIP: 0010:pv_native_safe_halt+0xf/0x20 arch/x86/kernel/paravirt.c:64 Code: bb 66 02 e9 c3 e6 03 00 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 b4 14 00 fb f4 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 90 90 90 90 90 RSP: 0018:ffffc900001c7e40 EFLAGS: 00000242 RAX: 0000000000058ffb RBX: ffffffff819b68bc RCX: 8000000000000001 RDX: 0000000000000001 RSI: ffffffff8dafb9ae RDI: ffffffff8bed2e80 RBP: ffffc900001c7f10 R08: ffff8880b85341db R09: 1ffff110170a683b R10: dffffc0000000000 R11: ffffed10170a683c R12: 0000000000000000 R13: 1ffff11003bdf3e8 R14: 1ffff92000038fd0 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff888124812000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005555783d3a38 CR3: 000000003e20e000 CR4: 00000000003526f0 Call Trace: arch_safe_halt arch/x86/kernel/process.c:767 [inline] default_idle+0x9/0x20 arch/x86/kernel/process.c:768 default_idle_call+0x72/0xb0 kernel/sched/idle.c:122 cpuidle_idle_call kernel/sched/idle.c:199 [inline] do_idle+0x1cc/0x540 kernel/sched/idle.c:355 cpu_startup_entry+0x43/0x60 kernel/sched/idle.c:458 start_secondary+0x101/0x110 arch/x86/kernel/smpboot.c:312 common_startup_64+0x13e/0x157 report is corrupted, running repro again testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:true BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendto-socket$inet_udp program crashed: no output from test machine final repro crashed as (corrupted=false):