Extracting prog: 1m36.432591695s Minimizing prog: 9m5.302045539s Simplifying prog options: 0s Extracting C: 1m5.454896874s Simplifying C: 5m51.346684549s 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: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}}): mkdirat-mount-openat-mmap-futex detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./mysys\x00', 0x1) mount(0x0, &(0x7f0000000100)='./mysys\x00', &(0x7f0000000200)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000300)='./mysys/bus/pci/devices/0000:00:02.0/resource0\x00', 0x2, 0x0) mmap(0x0, 0x1012, 0x3, 0x11, r0, 0x0) futex(0x0, 0x85, 0x0, 0x0, 0x0, 0xa0090199) program crashed: Internal error in futex_wake_op single: successfully extracted reproducer found reproducer with 5 syscalls minimizing guilty program testing program (duration=38.429670225s, {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}}): mkdirat-mount-openat-mmap detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./mysys\x00', 0x1) mount(0x0, &(0x7f0000000100)='./mysys\x00', &(0x7f0000000200)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000300)='./mysys/bus/pci/devices/0000:00:02.0/resource0\x00', 0x2, 0x0) mmap(0x0, 0x1012, 0x3, 0x11, r0, 0x0) program did not crash testing program (duration=38.429670225s, {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}}): mkdirat-mount-openat-futex detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./mysys\x00', 0x1) mount(0x0, &(0x7f0000000100)='./mysys\x00', &(0x7f0000000200)='sysfs\x00', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000300)='./mysys/bus/pci/devices/0000:00:02.0/resource0\x00', 0x2, 0x0) futex(0x0, 0x85, 0x0, 0x0, 0x0, 0xa0090199) program did not crash testing program (duration=38.429670225s, {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}}): mkdirat-mount-mmap-futex detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./mysys\x00', 0x1) mount(0x0, &(0x7f0000000100)='./mysys\x00', &(0x7f0000000200)='sysfs\x00', 0x0, 0x0) mmap(0x0, 0x1012, 0x3, 0x11, 0xffffffffffffffff, 0x0) futex(0x0, 0x85, 0x0, 0x0, 0x0, 0xa0090199) program did not crash testing program (duration=38.429670225s, {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}}): mkdirat-openat-mmap-futex detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./mysys\x00', 0x1) r0 = openat(0xffffffffffffff9c, &(0x7f0000000300)='./mysys/bus/pci/devices/0000:00:02.0/resource0\x00', 0x2, 0x0) mmap(0x0, 0x1012, 0x3, 0x11, r0, 0x0) futex(0x0, 0x85, 0x0, 0x0, 0x0, 0xa0090199) program did not crash testing program (duration=38.429670225s, {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}}): mount-openat-mmap-futex detailed listing: executing program 0: mount(0x0, &(0x7f0000000100)='./mysys\x00', &(0x7f0000000200)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000300)='./mysys/bus/pci/devices/0000:00:02.0/resource0\x00', 0x2, 0x0) mmap(0x0, 0x1012, 0x3, 0x11, r0, 0x0) futex(0x0, 0x85, 0x0, 0x0, 0x0, 0xa0090199) program did not crash testing program (duration=38.429670225s, {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}}): mkdirat-mount-openat-mmap-futex detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, 0x0, 0x1) mount(0x0, &(0x7f0000000100)='./mysys\x00', &(0x7f0000000200)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000300)='./mysys/bus/pci/devices/0000:00:02.0/resource0\x00', 0x2, 0x0) mmap(0x0, 0x1012, 0x3, 0x11, r0, 0x0) futex(0x0, 0x85, 0x0, 0x0, 0x0, 0xa0090199) program did not crash testing program (duration=38.429670225s, {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}}): mkdirat-mount-openat-mmap-futex detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./mysys\x00', 0x1) mount(0x0, 0x0, &(0x7f0000000200)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000300)='./mysys/bus/pci/devices/0000:00:02.0/resource0\x00', 0x2, 0x0) mmap(0x0, 0x1012, 0x3, 0x11, r0, 0x0) futex(0x0, 0x85, 0x0, 0x0, 0x0, 0xa0090199) program did not crash testing program (duration=38.429670225s, {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}}): mkdirat-mount-openat-mmap-futex detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./mysys\x00', 0x1) mount(0x0, &(0x7f0000000100)='./mysys\x00', 0x0, 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000300)='./mysys/bus/pci/devices/0000:00:02.0/resource0\x00', 0x2, 0x0) mmap(0x0, 0x1012, 0x3, 0x11, r0, 0x0) futex(0x0, 0x85, 0x0, 0x0, 0x0, 0xa0090199) program did not crash testing program (duration=38.429670225s, {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}}): mkdirat-mount-openat-mmap-futex detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./mysys\x00', 0x1) mount(0x0, &(0x7f0000000100)='./mysys\x00', &(0x7f0000000200)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, 0x0, 0x2, 0x0) mmap(0x0, 0x1012, 0x3, 0x11, r0, 0x0) futex(0x0, 0x85, 0x0, 0x0, 0x0, 0xa0090199) program did not crash extracting C reproducer testing compiled C program (duration=38.429670225s, {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}}): mkdirat-mount-openat-mmap-futex program crashed: Internal error in futex_wake_op simplifying C reproducer testing compiled C program (duration=38.429670225s, {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}}): mkdirat-mount-openat-mmap-futex program crashed: Internal error in futex_wake_op testing compiled C program (duration=38.429670225s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true 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}}): mkdirat-mount-openat-mmap-futex program crashed: Internal error in futex_wake_op testing compiled C program (duration=38.429670225s, {Threaded:false Repeat:false 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}}): mkdirat-mount-openat-mmap-futex program crashed: Internal error in futex_wake_op testing compiled C program (duration=38.429670225s, {Threaded:false Repeat:false 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:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-mmap-futex program crashed: Internal error in futex_wake_op testing compiled C program (duration=38.429670225s, {Threaded:false Repeat:false 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:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-mmap-futex program crashed: Internal error in futex_wake_op testing compiled C program (duration=38.429670225s, {Threaded:false Repeat:false 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:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-mmap-futex program crashed: Internal error in futex_wake_op testing compiled C program (duration=38.429670225s, {Threaded:false Repeat:false 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-mmap-futex program crashed: Internal error in futex_wake_op testing program (duration=38.429670225s, {Threaded:false Repeat:false 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-mmap-futex detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./mysys\x00', 0x1) mount(0x0, &(0x7f0000000100)='./mysys\x00', &(0x7f0000000200)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000300)='./mysys/bus/pci/devices/0000:00:02.0/resource0\x00', 0x2, 0x0) mmap(0x0, 0x1012, 0x3, 0x11, r0, 0x0) futex(0x0, 0x85, 0x0, 0x0, 0x0, 0xa0090199) program crashed: Internal error in futex_wake_op validation run: crashed=true testing program (duration=38.429670225s, {Threaded:false Repeat:false 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-mmap-futex detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./mysys\x00', 0x1) mount(0x0, &(0x7f0000000100)='./mysys\x00', &(0x7f0000000200)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000300)='./mysys/bus/pci/devices/0000:00:02.0/resource0\x00', 0x2, 0x0) mmap(0x0, 0x1012, 0x3, 0x11, r0, 0x0) futex(0x0, 0x85, 0x0, 0x0, 0x0, 0xa0090199) program crashed: Internal error in futex_wake_op validation run: crashed=true testing program (duration=38.429670225s, {Threaded:false Repeat:false 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdirat-mount-openat-mmap-futex detailed listing: executing program 0: mkdirat(0xffffffffffffff9c, &(0x7f0000000040)='./mysys\x00', 0x1) mount(0x0, &(0x7f0000000100)='./mysys\x00', &(0x7f0000000200)='sysfs\x00', 0x0, 0x0) r0 = openat(0xffffffffffffff9c, &(0x7f0000000300)='./mysys/bus/pci/devices/0000:00:02.0/resource0\x00', 0x2, 0x0) mmap(0x0, 0x1012, 0x3, 0x11, r0, 0x0) futex(0x0, 0x85, 0x0, 0x0, 0x0, 0xa0090199) program crashed: Internal error in futex_wake_op validation run: crashed=true reproducing took 21m4.295307587s repro crashed as (corrupted=false): futex_wake_op: syz.0.17 tries to shift op by 144; fix this program Internal error: synchronous external abort: 0000000096000010 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 4917 Comm: syz.0.17 Tainted: G M syzkaller #0 PREEMPT Tainted: [M]=MACHINE_CHECK Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 pstate: 83000005 (Nzcv daif -PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __llsc_futex_atomic_or arch/arm64/include/asm/futex.h:51 [inline] pc : __futex_atomic_or arch/arm64/include/asm/futex.h:239 [inline] pc : arch_futex_atomic_op_inuser arch/arm64/include/asm/futex.h:269 [inline] pc : futex_atomic_op_inuser kernel/futex/waitwake.c:251 [inline] pc : futex_wake_op+0x450/0xfe8 kernel/futex/waitwake.c:302 lr : mte_enable_tco arch/arm64/include/asm/mte-kasan.h:62 [inline] lr : uaccess_enable_privileged arch/arm64/include/asm/uaccess.h:147 [inline] lr : __llsc_futex_atomic_or arch/arm64/include/asm/futex.h:51 [inline] lr : __futex_atomic_or arch/arm64/include/asm/futex.h:239 [inline] lr : arch_futex_atomic_op_inuser arch/arm64/include/asm/futex.h:269 [inline] lr : futex_atomic_op_inuser kernel/futex/waitwake.c:251 [inline] lr : futex_wake_op+0x43c/0xfe8 kernel/futex/waitwake.c:302 sp : ffff800093197980 x29: ffff800093197b40 x28: 0000000000010000 x27: 0000000000000000 x26: 1fffe00018d2a3ad x25: dfff800000000000 x24: ffff0000c6951d40 x23: ffff0000c6951d6c x22: 0000000000000002 x21: 1fffe00018d2a685 x20: ffff0000c1df3780 x19: ffff0000c695342c x18: 0000000000000000 x17: 72676f7270207369 x16: 687420786966203b x15: 3434312079622070 x14: 6f20746669687320 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 00000000fffffff5 x9 : 0000000000000000 x8 : 0000000000000080 x7 : ffff80008048c60c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000805b0678 x2 : 0000000000000002 x1 : ffff0000c6951d40 x0 : 0000000000000000 Call trace: __llsc_futex_atomic_or arch/arm64/include/asm/futex.h:51 [inline] (P) __futex_atomic_or arch/arm64/include/asm/futex.h:239 [inline] (P) arch_futex_atomic_op_inuser arch/arm64/include/asm/futex.h:269 [inline] (P) futex_atomic_op_inuser kernel/futex/waitwake.c:251 [inline] (P) futex_wake_op+0x450/0xfe8 kernel/futex/waitwake.c:302 (P) do_futex+0x200/0x378 kernel/futex/syscalls.c:144 __do_sys_futex kernel/futex/syscalls.c:210 [inline] __se_sys_futex kernel/futex/syscalls.c:191 [inline] __arm64_sys_futex+0x2e4/0x418 kernel/futex/syscalls.c:191 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 Code: d500409f 1280014a f94057eb f9800171 (885f7d76) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: d500409f msr pan, #0x0 4: 1280014a mov w10, #0xfffffff5 // #-11 8: f94057eb ldr x11, [sp, #168] c: f9800171 prfm pstl1strm, [x11] * 10: 885f7d76 ldxr w22, [x11] <-- trapping instruction final repro crashed as (corrupted=false): futex_wake_op: syz.0.17 tries to shift op by 144; fix this program Internal error: synchronous external abort: 0000000096000010 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 4917 Comm: syz.0.17 Tainted: G M syzkaller #0 PREEMPT Tainted: [M]=MACHINE_CHECK Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/07/2026 pstate: 83000005 (Nzcv daif -PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __llsc_futex_atomic_or arch/arm64/include/asm/futex.h:51 [inline] pc : __futex_atomic_or arch/arm64/include/asm/futex.h:239 [inline] pc : arch_futex_atomic_op_inuser arch/arm64/include/asm/futex.h:269 [inline] pc : futex_atomic_op_inuser kernel/futex/waitwake.c:251 [inline] pc : futex_wake_op+0x450/0xfe8 kernel/futex/waitwake.c:302 lr : mte_enable_tco arch/arm64/include/asm/mte-kasan.h:62 [inline] lr : uaccess_enable_privileged arch/arm64/include/asm/uaccess.h:147 [inline] lr : __llsc_futex_atomic_or arch/arm64/include/asm/futex.h:51 [inline] lr : __futex_atomic_or arch/arm64/include/asm/futex.h:239 [inline] lr : arch_futex_atomic_op_inuser arch/arm64/include/asm/futex.h:269 [inline] lr : futex_atomic_op_inuser kernel/futex/waitwake.c:251 [inline] lr : futex_wake_op+0x43c/0xfe8 kernel/futex/waitwake.c:302 sp : ffff800093197980 x29: ffff800093197b40 x28: 0000000000010000 x27: 0000000000000000 x26: 1fffe00018d2a3ad x25: dfff800000000000 x24: ffff0000c6951d40 x23: ffff0000c6951d6c x22: 0000000000000002 x21: 1fffe00018d2a685 x20: ffff0000c1df3780 x19: ffff0000c695342c x18: 0000000000000000 x17: 72676f7270207369 x16: 687420786966203b x15: 3434312079622070 x14: 6f20746669687320 x13: 0000000000000001 x12: 0000000000000000 x11: 0000000000000000 x10: 00000000fffffff5 x9 : 0000000000000000 x8 : 0000000000000080 x7 : ffff80008048c60c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff8000805b0678 x2 : 0000000000000002 x1 : ffff0000c6951d40 x0 : 0000000000000000 Call trace: __llsc_futex_atomic_or arch/arm64/include/asm/futex.h:51 [inline] (P) __futex_atomic_or arch/arm64/include/asm/futex.h:239 [inline] (P) arch_futex_atomic_op_inuser arch/arm64/include/asm/futex.h:269 [inline] (P) futex_atomic_op_inuser kernel/futex/waitwake.c:251 [inline] (P) futex_wake_op+0x450/0xfe8 kernel/futex/waitwake.c:302 (P) do_futex+0x200/0x378 kernel/futex/syscalls.c:144 __do_sys_futex kernel/futex/syscalls.c:210 [inline] __se_sys_futex kernel/futex/syscalls.c:191 [inline] __arm64_sys_futex+0x2e4/0x418 kernel/futex/syscalls.c:191 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x64/0x260 arch/arm64/kernel/entry-common.c:758 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:777 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:590 Code: d500409f 1280014a f94057eb f9800171 (885f7d76) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: d500409f msr pan, #0x0 4: 1280014a mov w10, #0xfffffff5 // #-11 8: f94057eb ldr x11, [sp, #168] c: f9800171 prfm pstl1strm, [x11] * 10: 885f7d76 ldxr w22, [x11] <-- trapping instruction