Extracting prog: 1m40.239841414s Minimizing prog: 97.991µs Simplifying prog options: 7m41.713806435s Extracting C: 1m8.544768179s Simplifying C: 9m36.787866603s extracting reproducer from 31 programs first checking the prog from the crash report 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}}): futex detailed listing: executing program 0: futex(0x0, 0x84, 0x0, 0x0, 0x0, 0x0) program crashed: Internal error in futex_requeue single: successfully extracted reproducer found reproducer with 1 syscalls minimizing guilty program extracting C reproducer testing compiled C program (duration=45.460852593s, {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}}): futex program crashed: Internal error in sys_mount a never seen crash title: Internal error in sys_mount, ignore simplifying guilty program options testing program (duration=45.460852593s, {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}}): futex detailed listing: executing program 0: futex(0x0, 0x84, 0x0, 0x0, 0x0, 0x0) program crashed: Internal error in futex_requeue extracting C reproducer testing compiled C program (duration=45.460852593s, {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}}): futex program crashed: Internal error in sys_mount a never seen crash title: Internal error in sys_mount, ignore testing program (duration=45.460852593s, {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}}): futex detailed listing: executing program 0: futex(0x0, 0x84, 0x0, 0x0, 0x0, 0x0) program crashed: Internal error in sys_mount a never seen crash title: Internal error in sys_mount, ignore testing program (duration=45.460852593s, {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}}): futex detailed listing: executing program 0: futex(0x0, 0x84, 0x0, 0x0, 0x0, 0x0) program crashed: Internal error in futex_requeue extracting C reproducer testing compiled C program (duration=45.460852593s, {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}}): futex program crashed: Internal error in futex_requeue simplifying C reproducer testing compiled C program (duration=45.460852593s, {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}}): futex program crashed: Internal error in futex_requeue testing compiled C program (duration=45.460852593s, {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}}): futex program crashed: Internal error in futex_requeue testing compiled C program (duration=45.460852593s, {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}}): futex program crashed: Internal error in futex_requeue testing compiled C program (duration=45.460852593s, {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}}): futex program crashed: Internal error in futex_requeue testing compiled C program (duration=45.460852593s, {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}}): futex program crashed: Internal error in futex_requeue testing compiled C program (duration=45.460852593s, {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}}): futex program crashed: Internal error in futex_requeue testing program (duration=45.460852593s, {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}}): futex detailed listing: executing program 0: futex(0x0, 0x84, 0x0, 0x0, 0x0, 0x0) program crashed: Internal error in futex_requeue validation run: crashed=true testing program (duration=45.460852593s, {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}}): futex detailed listing: executing program 0: futex(0x0, 0x84, 0x0, 0x0, 0x0, 0x0) program crashed: Internal error in futex_requeue validation run: crashed=true testing program (duration=45.460852593s, {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}}): futex detailed listing: executing program 0: futex(0x0, 0x84, 0x0, 0x0, 0x0, 0x0) program crashed: Internal error in futex_requeue validation run: crashed=true reproducing took 26m45.639962692s repro crashed as (corrupted=false): Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4182 Comm: syz.0.17 Not tainted 5.15.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc) pc : get_futex_value_locked kernel/futex/core.c:793 [inline] pc : futex_requeue+0x5ac/0x1838 kernel/futex/core.c:2226 lr : __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:239 [inline] lr : get_futex_value_locked kernel/futex/core.c:790 [inline] lr : futex_requeue+0x588/0x1838 kernel/futex/core.c:2226 sp : ffff80001fb676e0 x29: ffff80001fb67840 x28: 1fffe0001aabece1 x27: ffff0000d55f6708 x26: dfff800000000000 x25: ffff0000d55f51e4 x24: 0000000000000000 x23: 1fffe0001aabea3c x22: ffff0000d55f51c0 x21: 0000000000000196 x20: ffff0000c0d30000 x19: 00000000fffffff2 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000083c25fc x15: 00000000f88c139e x14: 000000009bdb1a0a x13: 1ffff0000282e06b x12: 0000000000ff0100 x11: 0000ffffffffffff x10: 0000000000000000 x9 : 0000000000000000 x8 : 0000000000000000 x7 : ffff8000083c24d8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000082d608c x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: get_futex_value_locked kernel/futex/core.c:790 [inline] futex_requeue+0x5ac/0x1838 kernel/futex/core.c:2226 do_futex+0xb88/0x257c kernel/futex/core.c:-1 __do_sys_futex kernel/futex/core.c:4059 [inline] __se_sys_futex kernel/futex/core.c:4040 [inline] __arm64_sys_futex+0x388/0x400 kernel/futex/core.c:4040 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Code: d503229f b94083e0 2a0003f3 b8400918 (2a1303e1) ---[ end trace 9e36975f8edcd082 ]--- ---------------- Code disassembly (best guess): 0: d503229f csdb 4: b94083e0 ldr w0, [sp, #128] 8: 2a0003f3 mov w19, w0 c: b8400918 ldtr w24, [x8] * 10: 2a1303e1 mov w1, w19 <-- trapping instruction final repro crashed as (corrupted=false): Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4182 Comm: syz.0.17 Not tainted 5.15.189-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025 pstate: 42400405 (nZcv daif +PAN -UAO +TCO -DIT -SSBS BTYPE=jc) pc : get_futex_value_locked kernel/futex/core.c:793 [inline] pc : futex_requeue+0x5ac/0x1838 kernel/futex/core.c:2226 lr : __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:239 [inline] lr : get_futex_value_locked kernel/futex/core.c:790 [inline] lr : futex_requeue+0x588/0x1838 kernel/futex/core.c:2226 sp : ffff80001fb676e0 x29: ffff80001fb67840 x28: 1fffe0001aabece1 x27: ffff0000d55f6708 x26: dfff800000000000 x25: ffff0000d55f51e4 x24: 0000000000000000 x23: 1fffe0001aabea3c x22: ffff0000d55f51c0 x21: 0000000000000196 x20: ffff0000c0d30000 x19: 00000000fffffff2 x18: 0000000000000000 x17: 0000000000000000 x16: ffff8000083c25fc x15: 00000000f88c139e x14: 000000009bdb1a0a x13: 1ffff0000282e06b x12: 0000000000ff0100 x11: 0000ffffffffffff x10: 0000000000000000 x9 : 0000000000000000 x8 : 0000000000000000 x7 : ffff8000083c24d8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff8000082d608c x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000000 Call trace: get_futex_value_locked kernel/futex/core.c:790 [inline] futex_requeue+0x5ac/0x1838 kernel/futex/core.c:2226 do_futex+0xb88/0x257c kernel/futex/core.c:-1 __do_sys_futex kernel/futex/core.c:4059 [inline] __se_sys_futex kernel/futex/core.c:4040 [inline] __arm64_sys_futex+0x388/0x400 kernel/futex/core.c:4040 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Code: d503229f b94083e0 2a0003f3 b8400918 (2a1303e1) ---[ end trace 9e36975f8edcd082 ]--- ---------------- Code disassembly (best guess): 0: d503229f csdb 4: b94083e0 ldr w0, [sp, #128] 8: 2a0003f3 mov w19, w0 c: b8400918 ldtr w24, [x8] * 10: 2a1303e1 mov w1, w19 <-- trapping instruction