Extracting prog: 1m55.887195542s
Minimizing prog: 7m5.121150919s
Simplifying prog options: 0s
Extracting C: 1m48.122960332s
Simplifying C: 9m23.708877576s


extracting reproducer from 26 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}}): sendto$inet-mprotect-futex
detailed listing:
executing program 0:
sendto$inet(0xffffffffffffffff, 0x0, 0x0, 0x200087fd, &(0x7f00000000c0)={0x2, 0x4e23, @loopback}, 0x10)
mprotect(&(0x7f0000000000/0x4000)=nil, 0x4000, 0x1)
futex(&(0x7f0000000040), 0x88, 0x0, 0x0, 0x0, 0x0)

program crashed: Internal error in lock_pi_update_atomic
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=45.186121407s, {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$inet-mprotect
detailed listing:
executing program 0:
sendto$inet(0xffffffffffffffff, 0x0, 0x0, 0x200087fd, &(0x7f00000000c0)={0x2, 0x4e23, @loopback}, 0x10)
mprotect(&(0x7f0000000000/0x4000)=nil, 0x4000, 0x1)

program did not crash
testing program (duration=45.186121407s, {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$inet-futex
detailed listing:
executing program 0:
sendto$inet(0xffffffffffffffff, 0x0, 0x0, 0x200087fd, &(0x7f00000000c0)={0x2, 0x4e23, @loopback}, 0x10)
futex(&(0x7f0000000040), 0x88, 0x0, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=45.186121407s, {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}}): mprotect-futex
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0x4000)=nil, 0x4000, 0x1)
futex(&(0x7f0000000040), 0x88, 0x0, 0x0, 0x0, 0x0)

program crashed: Internal error in sys_mount
testing program (duration=45.186121407s, {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}}): mprotect-futex
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0x4000)=nil, 0x4000, 0x1)
futex(0x0, 0x88, 0x0, 0x0, 0x0, 0x0)

program crashed: Internal error in futex_lock_pi_atomic
extracting C reproducer
testing compiled C program (duration=45.186121407s, {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}}): mprotect-futex
program crashed: Internal error in futex_lock_pi_atomic
simplifying C reproducer
testing compiled C program (duration=45.186121407s, {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}}): mprotect-futex
program crashed: Internal error in futex_lock_pi_atomic
testing compiled C program (duration=45.186121407s, {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}}): mprotect-futex
program crashed: Internal error in futex_lock_pi_atomic
testing compiled C program (duration=45.186121407s, {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}}): mprotect-futex
program crashed: Internal error in futex_lock_pi_atomic
testing compiled C program (duration=45.186121407s, {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}}): mprotect-futex
program crashed: Internal error in futex_lock_pi_atomic
testing compiled C program (duration=45.186121407s, {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}}): mprotect-futex
program crashed: Internal error in futex_lock_pi_atomic
testing compiled C program (duration=45.186121407s, {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}}): mprotect-futex
program crashed: Internal error in futex_lock_pi_atomic
testing compiled C program (duration=45.186121407s, {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}}): mprotect-futex
program crashed: Internal error in futex_lock_pi_atomic
testing program (duration=45.186121407s, {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}}): mprotect-futex
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0x4000)=nil, 0x4000, 0x1)
futex(0x0, 0x88, 0x0, 0x0, 0x0, 0x0)

program crashed: Internal error in futex_lock_pi_atomic
validation run: crashed=true
testing program (duration=45.186121407s, {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}}): mprotect-futex
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0x4000)=nil, 0x4000, 0x1)
futex(0x0, 0x88, 0x0, 0x0, 0x0, 0x0)

program crashed: Internal error in futex_lock_pi_atomic
validation run: crashed=true
testing program (duration=45.186121407s, {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}}): mprotect-futex
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0x4000)=nil, 0x4000, 0x1)
futex(0x0, 0x88, 0x0, 0x0, 0x0, 0x0)

program crashed: Internal error in futex_lock_pi_atomic
validation run: crashed=true
reproducing took 24m57.412145792s
repro crashed as (corrupted=false):
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4212 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_lock_pi_atomic+0x170/0xea4 kernel/futex/core.c:1429
lr : __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:244 [inline]
lr : get_futex_value_locked kernel/futex/core.c:790 [inline]
lr : futex_lock_pi_atomic+0x14c/0xea4 kernel/futex/core.c:1429
sp : ffff80001fb97540
x29: ffff80001fb975c0 x28: ffff0000cd05b680 x27: ffff80001fb977d0
x26: 1fffe00019a0b979 x25: ffff0000cd05cbc8 x24: 00000000fffffff2
x23: ffff80001fb977b8 x22: 0000000000000000 x21: dfff800000000000
x20: 0000000000000000 x19: ffff0000c0d34200 x18: 0000000000000000
x17: ffff80000805b008 x16: ffff8000083c981c x15: ffff80000805b444
x14: ffff8000083c4470 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000001 x10: 0000000000000000 x9 : 0000ffffffffffff
x8 : 0000000000000000 x7 : ffff80000820263c x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 get_futex_value_locked kernel/futex/core.c:790 [inline]
 futex_lock_pi_atomic+0x170/0xea4 kernel/futex/core.c:1429
 futex_lock_pi+0x2d0/0x860 kernel/futex/core.c:3054
 do_futex+0x1664/0x257c 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: ea29011f 9a9f02ca d503229f b8400948 (2a1803e1) 
---[ end trace e9f71629ae4d8f57 ]---
----------------
Code disassembly (best guess):
   0:	ea29011f 	bics	xzr, x8, x9
   4:	9a9f02ca 	csel	x10, x22, xzr, eq	// eq = none
   8:	d503229f 	csdb
   c:	b8400948 	ldtr	w8, [x10]
* 10:	2a1803e1 	mov	w1, w24 <-- trapping instruction

final repro crashed as (corrupted=false):
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 PID: 4212 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_lock_pi_atomic+0x170/0xea4 kernel/futex/core.c:1429
lr : __uaccess_mask_ptr arch/arm64/include/asm/uaccess.h:244 [inline]
lr : get_futex_value_locked kernel/futex/core.c:790 [inline]
lr : futex_lock_pi_atomic+0x14c/0xea4 kernel/futex/core.c:1429
sp : ffff80001fb97540
x29: ffff80001fb975c0 x28: ffff0000cd05b680 x27: ffff80001fb977d0
x26: 1fffe00019a0b979 x25: ffff0000cd05cbc8 x24: 00000000fffffff2
x23: ffff80001fb977b8 x22: 0000000000000000 x21: dfff800000000000
x20: 0000000000000000 x19: ffff0000c0d34200 x18: 0000000000000000
x17: ffff80000805b008 x16: ffff8000083c981c x15: ffff80000805b444
x14: ffff8000083c4470 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000001 x10: 0000000000000000 x9 : 0000ffffffffffff
x8 : 0000000000000000 x7 : ffff80000820263c x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 get_futex_value_locked kernel/futex/core.c:790 [inline]
 futex_lock_pi_atomic+0x170/0xea4 kernel/futex/core.c:1429
 futex_lock_pi+0x2d0/0x860 kernel/futex/core.c:3054
 do_futex+0x1664/0x257c 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: ea29011f 9a9f02ca d503229f b8400948 (2a1803e1) 
---[ end trace e9f71629ae4d8f57 ]---
----------------
Code disassembly (best guess):
   0:	ea29011f 	bics	xzr, x8, x9
   4:	9a9f02ca 	csel	x10, x22, xzr, eq	// eq = none
   8:	d503229f 	csdb
   c:	b8400948 	ldtr	w8, [x10]
* 10:	2a1803e1 	mov	w1, w24 <-- trapping instruction