Extracting prog: 2m29.333317216s
Minimizing prog: 23m29.439627972s
Simplifying prog options: 0s
Extracting C: 1m46.442840868s
Simplifying C: 14m20.417912824s


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}}): mmap-userfaultfd-ioctl$UFFDIO_API-ioctl$UFFDIO_REGISTER-ioctl$UFFDIO_WRITEPROTECT-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
detailed listing:
executing program 0:
mmap(&(0x7f0000000000/0xff5000)=nil, 0xff5000, 0x3, 0x20000000ec071, 0xffffffffffffffff, 0x0)
r0 = userfaultfd(0x801)
ioctl$UFFDIO_API(r0, 0xc018aa3f, &(0x7f0000000280)={0xaa, 0x28})
ioctl$UFFDIO_REGISTER(r0, 0xc020aa00, &(0x7f0000000000)={{&(0x7f0000400000/0xc00000)=nil, 0xc00000}, 0x3})
ioctl$UFFDIO_WRITEPROTECT(r0, 0xc018aa06, &(0x7f0000000140)={{&(0x7f0000400000/0xc00000)=nil, 0xc00000}, 0x1})
r1 = io_uring_setup(0x5594, &(0x7f0000000100)={0x0, 0x10000000, 0x1, 0x1, 0x21e})
io_uring_register$IORING_REGISTER_BUFFERS(r1, 0x0, &(0x7f00000002c0)=[{&(0x7f0000001700)=""/4095, 0x440000}], 0x100000000000011a)

program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
single: successfully extracted reproducer
found reproducer with 7 syscalls
minimizing guilty program
testing program (duration=45.353856187s, {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}}): mmap-userfaultfd-ioctl$UFFDIO_API-ioctl$UFFDIO_REGISTER-ioctl$UFFDIO_WRITEPROTECT-io_uring_setup
detailed listing:
executing program 0:
mmap(&(0x7f0000000000/0xff5000)=nil, 0xff5000, 0x3, 0x20000000ec071, 0xffffffffffffffff, 0x0)
r0 = userfaultfd(0x801)
ioctl$UFFDIO_API(r0, 0xc018aa3f, &(0x7f0000000280)={0xaa, 0x28})
ioctl$UFFDIO_REGISTER(r0, 0xc020aa00, &(0x7f0000000000)={{&(0x7f0000400000/0xc00000)=nil, 0xc00000}, 0x3})
ioctl$UFFDIO_WRITEPROTECT(r0, 0xc018aa06, &(0x7f0000000140)={{&(0x7f0000400000/0xc00000)=nil, 0xc00000}, 0x1})
io_uring_setup(0x5594, &(0x7f0000000100)={0x0, 0x10000000, 0x1, 0x1, 0x21e})

program did not crash
testing program (duration=45.353856187s, {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}}): mmap-userfaultfd-ioctl$UFFDIO_API-ioctl$UFFDIO_REGISTER-ioctl$UFFDIO_WRITEPROTECT-io_uring_register$IORING_REGISTER_BUFFERS
detailed listing:
executing program 0:
mmap(&(0x7f0000000000/0xff5000)=nil, 0xff5000, 0x3, 0x20000000ec071, 0xffffffffffffffff, 0x0)
r0 = userfaultfd(0x801)
ioctl$UFFDIO_API(r0, 0xc018aa3f, &(0x7f0000000280)={0xaa, 0x28})
ioctl$UFFDIO_REGISTER(r0, 0xc020aa00, &(0x7f0000000000)={{&(0x7f0000400000/0xc00000)=nil, 0xc00000}, 0x3})
ioctl$UFFDIO_WRITEPROTECT(r0, 0xc018aa06, &(0x7f0000000140)={{&(0x7f0000400000/0xc00000)=nil, 0xc00000}, 0x1})
io_uring_register$IORING_REGISTER_BUFFERS(0xffffffffffffffff, 0x0, &(0x7f00000002c0)=[{&(0x7f0000001700)=""/4095, 0x440000}], 0x100000000000011a)

program did not crash
testing program (duration=45.353856187s, {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}}): mmap-userfaultfd-ioctl$UFFDIO_API-ioctl$UFFDIO_REGISTER-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
detailed listing:
executing program 0:
mmap(&(0x7f0000000000/0xff5000)=nil, 0xff5000, 0x3, 0x20000000ec071, 0xffffffffffffffff, 0x0)
r0 = userfaultfd(0x801)
ioctl$UFFDIO_API(r0, 0xc018aa3f, &(0x7f0000000280)={0xaa, 0x28})
ioctl$UFFDIO_REGISTER(r0, 0xc020aa00, &(0x7f0000000000)={{&(0x7f0000400000/0xc00000)=nil, 0xc00000}, 0x3})
r1 = io_uring_setup(0x5594, &(0x7f0000000100)={0x0, 0x10000000, 0x1, 0x1, 0x21e})
io_uring_register$IORING_REGISTER_BUFFERS(r1, 0x0, &(0x7f00000002c0)=[{&(0x7f0000001700)=""/4095, 0x440000}], 0x100000000000011a)

program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
testing program (duration=45.353856187s, {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}}): mmap-userfaultfd-ioctl$UFFDIO_API-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
detailed listing:
executing program 0:
mmap(&(0x7f0000000000/0xff5000)=nil, 0xff5000, 0x3, 0x20000000ec071, 0xffffffffffffffff, 0x0)
r0 = userfaultfd(0x801)
ioctl$UFFDIO_API(r0, 0xc018aa3f, &(0x7f0000000280)={0xaa, 0x28})
r1 = io_uring_setup(0x5594, &(0x7f0000000100)={0x0, 0x10000000, 0x1, 0x1, 0x21e})
io_uring_register$IORING_REGISTER_BUFFERS(r1, 0x0, &(0x7f00000002c0)=[{&(0x7f0000001700)=""/4095, 0x440000}], 0x100000000000011a)

program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
testing program (duration=45.353856187s, {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}}): mmap-userfaultfd-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
detailed listing:
executing program 0:
mmap(&(0x7f0000000000/0xff5000)=nil, 0xff5000, 0x3, 0x20000000ec071, 0xffffffffffffffff, 0x0)
userfaultfd(0x801)
r0 = io_uring_setup(0x5594, &(0x7f0000000100)={0x0, 0x10000000, 0x1, 0x1, 0x21e})
io_uring_register$IORING_REGISTER_BUFFERS(r0, 0x0, &(0x7f00000002c0)=[{&(0x7f0000001700)=""/4095, 0x440000}], 0x100000000000011a)

program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
testing program (duration=45.353856187s, {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}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
detailed listing:
executing program 0:
mmap(&(0x7f0000000000/0xff5000)=nil, 0xff5000, 0x3, 0x20000000ec071, 0xffffffffffffffff, 0x0)
r0 = io_uring_setup(0x5594, &(0x7f0000000100)={0x0, 0x10000000, 0x1, 0x1, 0x21e})
io_uring_register$IORING_REGISTER_BUFFERS(r0, 0x0, &(0x7f00000002c0)=[{&(0x7f0000001700)=""/4095, 0x440000}], 0x100000000000011a)

program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
testing program (duration=45.353856187s, {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}}): io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
detailed listing:
executing program 0:
r0 = io_uring_setup(0x5594, &(0x7f0000000100)={0x0, 0x10000000, 0x1, 0x1, 0x21e})
io_uring_register$IORING_REGISTER_BUFFERS(r0, 0x0, &(0x7f00000002c0)=[{&(0x7f0000001700)=""/4095, 0x440000}], 0x100000000000011a)

program did not crash
testing program (duration=45.353856187s, {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}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
detailed listing:
executing program 0:
mmap(&(0x7f0000000000/0xff5000)=nil, 0xff5000, 0x3, 0x20000000ec071, 0xffffffffffffffff, 0x0)
r0 = io_uring_setup(0x5594, 0x0)
io_uring_register$IORING_REGISTER_BUFFERS(r0, 0x0, &(0x7f00000002c0)=[{&(0x7f0000001700)=""/4095, 0x440000}], 0x100000000000011a)

program did not crash
testing program (duration=45.353856187s, {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}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
detailed listing:
executing program 0:
mmap(&(0x7f0000000000/0xff5000)=nil, 0xff5000, 0x3, 0x20000000ec071, 0xffffffffffffffff, 0x0)
r0 = io_uring_setup(0x5594, &(0x7f0000000100)={0x0, 0x10000000, 0x1, 0x1, 0x21e})
io_uring_register$IORING_REGISTER_BUFFERS(r0, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=45.353856187s, {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}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
detailed listing:
executing program 0:
mmap(&(0x7f0000000000/0xff5000)=nil, 0xff5000, 0x3, 0x20000000ec071, 0xffffffffffffffff, 0x0)
r0 = io_uring_setup(0x5594, &(0x7f0000000100)={0x0, 0x10000000, 0x1, 0x1, 0x21e})
io_uring_register$IORING_REGISTER_BUFFERS(r0, 0x0, &(0x7f00000002c0)=[{0x0}], 0x1)

program did not crash
extracting C reproducer
testing compiled C program (duration=45.353856187s, {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}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
simplifying C reproducer
testing compiled C program (duration=45.353856187s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
testing compiled C program (duration=45.353856187s, {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}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
testing compiled C program (duration=45.353856187s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
testing compiled C program (duration=45.353856187s, {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}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
testing compiled C program (duration=45.353856187s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
testing compiled C program (duration=45.353856187s, {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}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
testing compiled C program (duration=45.353856187s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
testing program (duration=45.353856187s, {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}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
detailed listing:
executing program 0:
mmap(&(0x7f0000000000/0xff5000)=nil, 0xff5000, 0x3, 0x20000000ec071, 0xffffffffffffffff, 0x0)
r0 = io_uring_setup(0x5594, &(0x7f0000000100)={0x0, 0x10000000, 0x1, 0x1, 0x21e})
io_uring_register$IORING_REGISTER_BUFFERS(r0, 0x0, &(0x7f00000002c0)=[{&(0x7f0000001700)=""/4095, 0x440000}], 0x100000000000011a)

program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
validation run: crashed=true
testing program (duration=45.353856187s, {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}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
detailed listing:
executing program 0:
mmap(&(0x7f0000000000/0xff5000)=nil, 0xff5000, 0x3, 0x20000000ec071, 0xffffffffffffffff, 0x0)
r0 = io_uring_setup(0x5594, &(0x7f0000000100)={0x0, 0x10000000, 0x1, 0x1, 0x21e})
io_uring_register$IORING_REGISTER_BUFFERS(r0, 0x0, &(0x7f00000002c0)=[{&(0x7f0000001700)=""/4095, 0x440000}], 0x100000000000011a)

program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
validation run: crashed=true
testing program (duration=45.353856187s, {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}}): mmap-io_uring_setup-io_uring_register$IORING_REGISTER_BUFFERS
detailed listing:
executing program 0:
mmap(&(0x7f0000000000/0xff5000)=nil, 0xff5000, 0x3, 0x20000000ec071, 0xffffffffffffffff, 0x0)
r0 = io_uring_setup(0x5594, &(0x7f0000000100)={0x0, 0x10000000, 0x1, 0x1, 0x21e})
io_uring_register$IORING_REGISTER_BUFFERS(r0, 0x0, &(0x7f00000002c0)=[{&(0x7f0000001700)=""/4095, 0x440000}], 0x100000000000011a)

program crashed: KASAN: null-ptr-deref Read in io_sqe_buffer_register
validation run: crashed=true
reproducing took 48m31.022754677s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: null-ptr-deref in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: null-ptr-deref in PageCompound include/linux/page-flags.h:331 [inline]
BUG: KASAN: null-ptr-deref in io_buffer_account_pin io_uring/rsrc.c:668 [inline]
BUG: KASAN: null-ptr-deref in io_sqe_buffer_register+0x369/0x20a0 io_uring/rsrc.c:817
Read of size 8 at addr 0000000000000000 by task syz.0.17/6093

CPU: 0 UID: 0 PID: 6093 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 kasan_report+0x118/0x150 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:200
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 PageCompound include/linux/page-flags.h:331 [inline]
 io_buffer_account_pin io_uring/rsrc.c:668 [inline]
 io_sqe_buffer_register+0x369/0x20a0 io_uring/rsrc.c:817
 io_sqe_buffers_register+0x3b9/0x8e0 io_uring/rsrc.c:913
 __io_uring_register io_uring/register.c:657 [inline]
 __do_sys_io_uring_register io_uring/register.c:926 [inline]
 __se_sys_io_uring_register+0xb85/0x11b0 io_uring/register.c:903
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f71d0b8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc64956de8 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab
RAX: ffffffffffffffda RBX: 00007f71d0dc5fa0 RCX: 00007f71d0b8ebe9
RDX: 00002000000002c0 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f71d0c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 100000000000011a R11: 0000000000000246 R12: 0000000000000000
R13: 00007f71d0dc5fa0 R14: 00007f71d0dc5fa0 R15: 0000000000000004
 </TASK>
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:68 [inline]
BUG: KASAN: null-ptr-deref in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
BUG: KASAN: null-ptr-deref in PageCompound include/linux/page-flags.h:331 [inline]
BUG: KASAN: null-ptr-deref in io_buffer_account_pin io_uring/rsrc.c:668 [inline]
BUG: KASAN: null-ptr-deref in io_sqe_buffer_register+0x369/0x20a0 io_uring/rsrc.c:817
Read of size 8 at addr 0000000000000000 by task syz.0.17/6093

CPU: 0 UID: 0 PID: 6093 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 kasan_report+0x118/0x150 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:200
 instrument_atomic_read include/linux/instrumented.h:68 [inline]
 _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
 PageCompound include/linux/page-flags.h:331 [inline]
 io_buffer_account_pin io_uring/rsrc.c:668 [inline]
 io_sqe_buffer_register+0x369/0x20a0 io_uring/rsrc.c:817
 io_sqe_buffers_register+0x3b9/0x8e0 io_uring/rsrc.c:913
 __io_uring_register io_uring/register.c:657 [inline]
 __do_sys_io_uring_register io_uring/register.c:926 [inline]
 __se_sys_io_uring_register+0xb85/0x11b0 io_uring/register.c:903
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xfa0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f71d0b8ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc64956de8 EFLAGS: 00000246 ORIG_RAX: 00000000000001ab
RAX: ffffffffffffffda RBX: 00007f71d0dc5fa0 RCX: 00007f71d0b8ebe9
RDX: 00002000000002c0 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f71d0c11e19 R08: 0000000000000000 R09: 0000000000000000
R10: 100000000000011a R11: 0000000000000246 R12: 0000000000000000
R13: 00007f71d0dc5fa0 R14: 00007f71d0dc5fa0 R15: 0000000000000004
 </TASK>
==================================================================