Extracting prog: 2m2.230904681s
Minimizing prog: 6m49.908157865s
Simplifying prog options: 0s
Extracting C: 38.588776384s
Simplifying C: 7m40.387678179s


extracting reproducer from 30 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}}): mprotect-ppoll
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x5)
ppoll(&(0x7f0000000000)=[{0xffffffffffffffff, 0x12}], 0x1, &(0x7f0000000040)={0x77359400}, 0x0, 0x0)

program crashed: Internal error in do_sys_poll
single: successfully extracted reproducer
found reproducer with 2 syscalls
minimizing guilty program
testing program (duration=45.179654784s, {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
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x5)

program did not crash
testing program (duration=45.179654784s, {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}}): ppoll
detailed listing:
executing program 0:
ppoll(&(0x7f0000000000)=[{0xffffffffffffffff, 0x12}], 0x1, &(0x7f0000000040)={0x77359400}, 0x0, 0x0)

program did not crash
testing program (duration=45.179654784s, {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-ppoll
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x5)
ppoll(0x0, 0x0, &(0x7f0000000040)={0x77359400}, 0x0, 0x0)

program did not crash
testing program (duration=45.179654784s, {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-ppoll
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x5)
ppoll(&(0x7f0000000000)=[{0xffffffffffffffff, 0x12}], 0x1, 0x0, 0x0, 0x0)

program crashed: Internal error in do_sys_poll
extracting C reproducer
testing compiled C program (duration=45.179654784s, {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-ppoll
program crashed: Internal error in do_sys_poll
simplifying C reproducer
testing compiled C program (duration=45.179654784s, {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-ppoll
program crashed: Internal error in do_sys_poll
testing compiled C program (duration=45.179654784s, {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-ppoll
program crashed: Internal error in do_sys_poll
testing compiled C program (duration=45.179654784s, {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-ppoll
program crashed: Internal error in do_sys_poll
testing compiled C program (duration=45.179654784s, {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-ppoll
program crashed: Internal error in do_sys_poll
testing compiled C program (duration=45.179654784s, {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-ppoll
program crashed: Internal error in do_sys_poll
testing compiled C program (duration=45.179654784s, {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-ppoll
program did not crash
testing compiled C program (duration=45.179654784s, {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:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-ppoll
program crashed: Internal error in do_sys_poll
testing program (duration=45.179654784s, {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:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-ppoll
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x5)
ppoll(&(0x7f0000000000)=[{0xffffffffffffffff, 0x12}], 0x1, 0x0, 0x0, 0x0)

program crashed: Internal error in do_sys_poll
validation run: crashed=true
testing program (duration=45.179654784s, {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:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-ppoll
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x5)
ppoll(&(0x7f0000000000)=[{0xffffffffffffffff, 0x12}], 0x1, 0x0, 0x0, 0x0)

program crashed: Internal error in do_sys_poll
validation run: crashed=true
testing program (duration=45.179654784s, {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:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-ppoll
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0x800000)=nil, 0x800000, 0x5)
ppoll(&(0x7f0000000000)=[{0xffffffffffffffff, 0x12}], 0x1, 0x0, 0x0, 0x0)

program crashed: Internal error in do_sys_poll
validation run: crashed=true
reproducing took 22m16.491232558s
repro crashed as (corrupted=false):
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 4261 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 : do_sys_poll+0xda8/0xff0 fs/select.c:1025
lr : do_sys_poll+0xd70/0xff0 fs/select.c:1025
sp : ffff80001f8a76a0
x29: ffff80001f8a7c40 x28: 0000000020000006 x27: 0000000000000000
x26: 0000002000000600 x25: ffff80001f8a7ae2 x24: 00000000fffffff2
x23: 0000000020000006 x22: ffff80001f8a7ae2 x21: 0000000020000006
x20: 0000000020000006 x19: 0000000000000000 x18: 1fffe00034218b96
x17: 1fffe00034218b96 x16: ffff80000892cc20 x15: ffff80001420eda0
x14: ffff0001a10c5cc0 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : dfff800000000000
x8 : 0000000000000000 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 do_sys_poll+0xda8/0xff0 fs/select.c:1025
 __do_sys_ppoll fs/select.c:1120 [inline]
 __se_sys_ppoll fs/select.c:1100 [inline]
 __arm64_sys_ppoll+0x218/0x2a8 fs/select.c:1100
 __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: 2a1303f8 79400328 2a1303e0 78000ae8 (2a1803e1) 
---[ end trace 71897817a99d39bc ]---
----------------
Code disassembly (best guess):
   0:	2a1303f8 	mov	w24, w19
   4:	79400328 	ldrh	w8, [x25]
   8:	2a1303e0 	mov	w0, w19
   c:	78000ae8 	sttrh	w8, [x23]
* 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: 0 PID: 4261 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 : do_sys_poll+0xda8/0xff0 fs/select.c:1025
lr : do_sys_poll+0xd70/0xff0 fs/select.c:1025
sp : ffff80001f8a76a0
x29: ffff80001f8a7c40 x28: 0000000020000006 x27: 0000000000000000
x26: 0000002000000600 x25: ffff80001f8a7ae2 x24: 00000000fffffff2
x23: 0000000020000006 x22: ffff80001f8a7ae2 x21: 0000000020000006
x20: 0000000020000006 x19: 0000000000000000 x18: 1fffe00034218b96
x17: 1fffe00034218b96 x16: ffff80000892cc20 x15: ffff80001420eda0
x14: ffff0001a10c5cc0 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000000000000000 x9 : dfff800000000000
x8 : 0000000000000000 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 do_sys_poll+0xda8/0xff0 fs/select.c:1025
 __do_sys_ppoll fs/select.c:1120 [inline]
 __se_sys_ppoll fs/select.c:1100 [inline]
 __arm64_sys_ppoll+0x218/0x2a8 fs/select.c:1100
 __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: 2a1303f8 79400328 2a1303e0 78000ae8 (2a1803e1) 
---[ end trace 71897817a99d39bc ]---
----------------
Code disassembly (best guess):
   0:	2a1303f8 	mov	w24, w19
   4:	79400328 	ldrh	w8, [x25]
   8:	2a1303e0 	mov	w0, w19
   c:	78000ae8 	sttrh	w8, [x23]
* 10:	2a1803e1 	mov	w1, w24 <-- trapping instruction