Extracting prog: 53.305022358s
Minimizing prog: 9m28.395938652s
Simplifying prog options: 0s
Extracting C: 1m12.729886936s
Simplifying C: 6m47.242626113s


extracting reproducer from 10 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}}): sendmmsg-mprotect-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
detailed listing:
executing program 0:
sendmmsg(0xffffffffffffffff, &(0x7f0000000700)=[{{0x0, 0x0, &(0x7f0000000100)=[{&(0x7f00000004c0)="7c5d7aef", 0x4}], 0x1, 0x0, 0xa0}}], 0x1, 0x0)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
r0 = epoll_create1(0x0)
r1 = userfaultfd(0x80801)
epoll_ctl$EPOLL_CTL_ADD(r0, 0x1, r1, &(0x7f00000004c0)={0xb0002016})
epoll_pwait2(r0, &(0x7f0000000280)=[{}], 0x1, 0x0, 0x0, 0x0)

program crashed: Internal error in ep_poll
single: successfully extracted reproducer
found reproducer with 6 syscalls
minimizing guilty program
testing program (duration=45.568618999s, {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}}): sendmmsg-mprotect-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD
detailed listing:
executing program 0:
sendmmsg(0xffffffffffffffff, &(0x7f0000000700)=[{{0x0, 0x0, &(0x7f0000000100)=[{&(0x7f00000004c0)="7c5d7aef", 0x4}], 0x1, 0x0, 0xa0}}], 0x1, 0x0)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
r0 = epoll_create1(0x0)
r1 = userfaultfd(0x80801)
epoll_ctl$EPOLL_CTL_ADD(r0, 0x1, r1, &(0x7f00000004c0)={0xb0002016})

program did not crash
testing program (duration=45.568618999s, {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}}): sendmmsg-mprotect-epoll_create1-userfaultfd-epoll_pwait2
detailed listing:
executing program 0:
sendmmsg(0xffffffffffffffff, &(0x7f0000000700)=[{{0x0, 0x0, &(0x7f0000000100)=[{&(0x7f00000004c0)="7c5d7aef", 0x4}], 0x1, 0x0, 0xa0}}], 0x1, 0x0)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
r0 = epoll_create1(0x0)
userfaultfd(0x80801)
epoll_pwait2(r0, &(0x7f0000000280)=[{}], 0x1, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=45.568618999s, {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}}): sendmmsg-mprotect-epoll_create1-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
detailed listing:
executing program 0:
sendmmsg(0xffffffffffffffff, &(0x7f0000000700)=[{{0x0, 0x0, &(0x7f0000000100)=[{&(0x7f00000004c0)="7c5d7aef", 0x4}], 0x1, 0x0, 0xa0}}], 0x1, 0x0)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
r0 = epoll_create1(0x0)
epoll_ctl$EPOLL_CTL_ADD(r0, 0x1, 0xffffffffffffffff, &(0x7f00000004c0)={0xb0002016})
epoll_pwait2(r0, &(0x7f0000000280)=[{}], 0x1, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=45.568618999s, {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}}): sendmmsg-mprotect-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
detailed listing:
executing program 0:
sendmmsg(0xffffffffffffffff, &(0x7f0000000700)=[{{0x0, 0x0, &(0x7f0000000100)=[{&(0x7f00000004c0)="7c5d7aef", 0x4}], 0x1, 0x0, 0xa0}}], 0x1, 0x0)
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
r0 = userfaultfd(0x80801)
epoll_ctl$EPOLL_CTL_ADD(0xffffffffffffffff, 0x1, r0, &(0x7f00000004c0)={0xb0002016})
epoll_pwait2(0xffffffffffffffff, &(0x7f0000000280)=[{}], 0x1, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=45.568618999s, {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}}): sendmmsg-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
detailed listing:
executing program 0:
sendmmsg(0xffffffffffffffff, &(0x7f0000000700)=[{{0x0, 0x0, &(0x7f0000000100)=[{&(0x7f00000004c0)="7c5d7aef", 0x4}], 0x1, 0x0, 0xa0}}], 0x1, 0x0)
r0 = epoll_create1(0x0)
r1 = userfaultfd(0x80801)
epoll_ctl$EPOLL_CTL_ADD(r0, 0x1, r1, &(0x7f00000004c0)={0xb0002016})
epoll_pwait2(r0, &(0x7f0000000280)=[{}], 0x1, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=45.568618999s, {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-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
r0 = epoll_create1(0x0)
r1 = userfaultfd(0x80801)
epoll_ctl$EPOLL_CTL_ADD(r0, 0x1, r1, &(0x7f00000004c0)={0xb0002016})
epoll_pwait2(r0, &(0x7f0000000280)=[{}], 0x1, 0x0, 0x0, 0x0)

program crashed: Internal error in ep_poll
testing program (duration=45.568618999s, {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-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
r0 = epoll_create1(0x0)
r1 = userfaultfd(0x80801)
epoll_ctl$EPOLL_CTL_ADD(r0, 0x1, r1, 0x0)
epoll_pwait2(r0, &(0x7f0000000280)=[{}], 0x1, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=45.568618999s, {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-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
r0 = epoll_create1(0x0)
r1 = userfaultfd(0x80801)
epoll_ctl$EPOLL_CTL_ADD(r0, 0x1, r1, &(0x7f00000004c0)={0xb0002016})
epoll_pwait2(r0, 0x0, 0x0, 0x0, 0x0, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=45.568618999s, {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-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
program crashed: Internal error in ep_poll
simplifying C reproducer
testing compiled C program (duration=45.568618999s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
program crashed: Internal error in ep_poll
testing compiled C program (duration=45.568618999s, {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-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
program crashed: Internal error in ep_poll
testing compiled C program (duration=45.568618999s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
program crashed: Internal error in ep_poll
testing compiled C program (duration=45.568618999s, {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-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
program crashed: Internal error in ep_poll
testing compiled C program (duration=45.568618999s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
program crashed: Internal error in ep_poll
testing compiled C program (duration=45.568618999s, {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-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
program did not crash
testing compiled C program (duration=45.568618999s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mprotect-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
program crashed: Internal error in ep_poll
testing program (duration=45.568618999s, {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-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
r0 = epoll_create1(0x0)
r1 = userfaultfd(0x80801)
epoll_ctl$EPOLL_CTL_ADD(r0, 0x1, r1, &(0x7f00000004c0)={0xb0002016})
epoll_pwait2(r0, &(0x7f0000000280)=[{}], 0x1, 0x0, 0x0, 0x0)

program crashed: Internal error in ep_poll
validation run: crashed=true
testing program (duration=45.568618999s, {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-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
r0 = epoll_create1(0x0)
r1 = userfaultfd(0x80801)
epoll_ctl$EPOLL_CTL_ADD(r0, 0x1, r1, &(0x7f00000004c0)={0xb0002016})
epoll_pwait2(r0, &(0x7f0000000280)=[{}], 0x1, 0x0, 0x0, 0x0)

program crashed: Internal error in ep_poll
validation run: crashed=true
testing program (duration=45.568618999s, {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-epoll_create1-userfaultfd-epoll_ctl$EPOLL_CTL_ADD-epoll_pwait2
detailed listing:
executing program 0:
mprotect(&(0x7f0000000000/0xf000)=nil, 0xf000, 0x1)
r0 = epoll_create1(0x0)
r1 = userfaultfd(0x80801)
epoll_ctl$EPOLL_CTL_ADD(r0, 0x1, r1, &(0x7f00000004c0)={0xb0002016})
epoll_pwait2(r0, &(0x7f0000000280)=[{}], 0x1, 0x0, 0x0, 0x0)

program crashed: Internal error in ep_poll
validation run: crashed=true
reproducing took 22m9.416140035s
repro crashed as (corrupted=false):
Internal error: Oops - BTI: 0000000036000001 [#1] PREEMPT SMP
Modules linked in:
CPU: 1 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 : epoll_put_uevent include/linux/eventpoll.h:81 [inline]
pc : ep_send_events fs/eventpoll.c:1732 [inline]
pc : ep_poll+0x854/0x1598 fs/eventpoll.c:1861
lr : epoll_put_uevent include/linux/eventpoll.h:81 [inline]
lr : ep_send_events fs/eventpoll.c:1732 [inline]
lr : ep_poll+0x82c/0x1598 fs/eventpoll.c:1861
sp : ffff80001f6079c0
x29: ffff80001f607bc0 x28: 1fffe0001904b39b x27: dfff800000000000
x26: 1fffe000190f4a3c x25: ffff0000c8259cd8 x24: 0000000000000000
x23: 0000000020000280 x22: 0000000000000008 x21: ffff0000c8259ce0
x20: ffff0000c8259d20 x19: 00000000fffffff2 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800008a01258 x15: 0000000000000000
x14: 0000000000000000 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000000020000280
x8 : 0000000020000280 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 epoll_put_uevent include/linux/eventpoll.h:81 [inline]
 ep_send_events fs/eventpoll.c:1732 [inline]
 ep_poll+0x854/0x1598 fs/eventpoll.c:1861
 do_epoll_wait+0x1a0/0x218 fs/eventpoll.c:2296
 do_epoll_pwait+0x70/0x19c fs/eventpoll.c:2330
 __do_sys_epoll_pwait2 fs/eventpoll.c:2362 [inline]
 __se_sys_epoll_pwait2 fs/eventpoll.c:2348 [inline]
 __arm64_sys_epoll_pwait2+0x184/0x208 fs/eventpoll.c:2348
 __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: b940dff8 2a1803f3 2a1803e0 b8000936 (2a1303e1) 
---[ end trace 71653509234f3c8c ]---
----------------
Code disassembly (best guess):
   0:	b940dff8 	ldr	w24, [sp, #220]
   4:	2a1803f3 	mov	w19, w24
   8:	2a1803e0 	mov	w0, w24
   c:	b8000936 	sttr	w22, [x9]
* 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: 1 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 : epoll_put_uevent include/linux/eventpoll.h:81 [inline]
pc : ep_send_events fs/eventpoll.c:1732 [inline]
pc : ep_poll+0x854/0x1598 fs/eventpoll.c:1861
lr : epoll_put_uevent include/linux/eventpoll.h:81 [inline]
lr : ep_send_events fs/eventpoll.c:1732 [inline]
lr : ep_poll+0x82c/0x1598 fs/eventpoll.c:1861
sp : ffff80001f6079c0
x29: ffff80001f607bc0 x28: 1fffe0001904b39b x27: dfff800000000000
x26: 1fffe000190f4a3c x25: ffff0000c8259cd8 x24: 0000000000000000
x23: 0000000020000280 x22: 0000000000000008 x21: ffff0000c8259ce0
x20: ffff0000c8259d20 x19: 00000000fffffff2 x18: 0000000000000000
x17: 0000000000000000 x16: ffff800008a01258 x15: 0000000000000000
x14: 0000000000000000 x13: 1ffff0000282e06b x12: 0000000000ff0100
x11: 0000000000000000 x10: 0000ffffffffffff x9 : 0000000020000280
x8 : 0000000020000280 x7 : ffff800008750ed4 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000001
x2 : 0000000000000008 x1 : 0000000000000001 x0 : 0000000000000000
Call trace:
 epoll_put_uevent include/linux/eventpoll.h:81 [inline]
 ep_send_events fs/eventpoll.c:1732 [inline]
 ep_poll+0x854/0x1598 fs/eventpoll.c:1861
 do_epoll_wait+0x1a0/0x218 fs/eventpoll.c:2296
 do_epoll_pwait+0x70/0x19c fs/eventpoll.c:2330
 __do_sys_epoll_pwait2 fs/eventpoll.c:2362 [inline]
 __se_sys_epoll_pwait2 fs/eventpoll.c:2348 [inline]
 __arm64_sys_epoll_pwait2+0x184/0x208 fs/eventpoll.c:2348
 __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: b940dff8 2a1803f3 2a1803e0 b8000936 (2a1303e1) 
---[ end trace 71653509234f3c8c ]---
----------------
Code disassembly (best guess):
   0:	b940dff8 	ldr	w24, [sp, #220]
   4:	2a1803f3 	mov	w19, w24
   8:	2a1803e0 	mov	w0, w24
   c:	b8000936 	sttr	w22, [x9]
* 10:	2a1303e1 	mov	w1, w19 <-- trapping instruction