Extracting prog: 5m8.501971247s
Minimizing prog: 55m16.039741702s
Simplifying prog options: 0s
Extracting C: 34.607875439s
Simplifying C: 10m51.194235502s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000180), 0x1, 0x0)
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064b2, &(0x7f00000029c0)={0x6, 0x8000005, 0x9, 0x0, <r1=>0x0})
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064d2, &(0x7f0000000080)={0x1, 0x80, 0x3}) (async)
ioctl$DRM_IOCTL_MODE_DESTROY_DUMB(r0, 0xc00464b4, &(0x7f0000000040)={r1})

program did not crash
program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000180), 0x1, 0x0)
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064b2, &(0x7f00000029c0)={0x6, 0x8000005, 0x9, 0x0, <r1=>0x0})
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064d2, &(0x7f0000000080)={0x1, 0x80, 0x3}) (async)
ioctl$DRM_IOCTL_MODE_DESTROY_DUMB(r0, 0xc00464b4, &(0x7f0000000040)={r1})

program crashed: KASAN: slab-use-after-free Read in drm_gem_object_release_handle
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000180), 0x1, 0x0)
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064b2, &(0x7f00000029c0)={0x6, 0x8000005, 0x9})
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064d2, &(0x7f0000000080)={0x1, 0x80, 0x3}) (async)

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000180), 0x1, 0x0)
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064b2, &(0x7f00000029c0)={0x6, 0x8000005, 0x9, 0x0, <r1=>0x0})
ioctl$DRM_IOCTL_MODE_DESTROY_DUMB(r0, 0xc00464b4, &(0x7f0000000040)={r1})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000180), 0x1, 0x0)
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064d2, &(0x7f0000000080)={0x1, 0x80, 0x3}) (async)
ioctl$DRM_IOCTL_MODE_DESTROY_DUMB(r0, 0xc00464b4, &(0x7f0000000040))

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
detailed listing:
executing program 0:
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(0xffffffffffffffff, 0xc02064b2, &(0x7f00000029c0)={0x6, 0x8000005, 0x9, 0x0, <r0=>0x0})
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(0xffffffffffffffff, 0xc02064d2, &(0x7f0000000080)={0x1, 0x80, 0x3}) (async)
ioctl$DRM_IOCTL_MODE_DESTROY_DUMB(0xffffffffffffffff, 0xc00464b4, &(0x7f0000000040)={r0})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000180), 0x1, 0x0)
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064b2, &(0x7f00000029c0)={0x6, 0x8000005, 0x9, 0x0, <r1=>0x0})
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064d2, &(0x7f0000000080)={0x1, 0x80, 0x3})
ioctl$DRM_IOCTL_MODE_DESTROY_DUMB(r0, 0xc00464b4, &(0x7f0000000040)={r1})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(0x0, 0x1, 0x0)
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064b2, &(0x7f00000029c0)={0x6, 0x8000005, 0x9, 0x0, <r1=>0x0})
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064d2, &(0x7f0000000080)={0x1, 0x80, 0x3}) (async)
ioctl$DRM_IOCTL_MODE_DESTROY_DUMB(r0, 0xc00464b4, &(0x7f0000000040)={r1})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000180), 0x1, 0x0)
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064b2, 0x0)
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064d2, &(0x7f0000000080)={0x1, 0x80, 0x3}) (async)
ioctl$DRM_IOCTL_MODE_DESTROY_DUMB(r0, 0xc00464b4, &(0x7f0000000040))

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000180), 0x1, 0x0)
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064b2, &(0x7f00000029c0)={0x6, 0x8000005, 0x9, 0x0, <r1=>0x0})
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064d2, 0x0) (async)
ioctl$DRM_IOCTL_MODE_DESTROY_DUMB(r0, 0xc00464b4, &(0x7f0000000040)={r1})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000180), 0x1, 0x0)
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064b2, &(0x7f00000029c0)={0x6, 0x8000005, 0x9})
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064d2, &(0x7f0000000080)={0x1, 0x80, 0x3}) (async)
ioctl$DRM_IOCTL_MODE_DESTROY_DUMB(r0, 0xc00464b4, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
program crashed: KASAN: slab-use-after-free Read in drm_gem_object_release_handle
simplifying C reproducer
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
program did not crash
testing compiled C program (duration=6m0s, {Threaded:true 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
program crashed: KASAN: slab-use-after-free Read in drm_gem_object_release_handle
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
program crashed: KASAN: slab-use-after-free Read in drm_gem_object_release_handle
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
program crashed: KASAN: slab-use-after-free Read in drm_gem_object_release_handle
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
program crashed: KASAN: slab-use-after-free Read in drm_gem_object_release_handle
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
program crashed: KASAN: slab-use-after-free Read in drm_gem_object_release_handle
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
program crashed: KASAN: slab-use-after-free Read in drm_gem_object_release_handle
testing program (duration=6m0s, {Threaded:true Repeat:true 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000180), 0x1, 0x0)
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064b2, &(0x7f00000029c0)={0x6, 0x8000005, 0x9, 0x0, <r1=>0x0})
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064d2, &(0x7f0000000080)={0x1, 0x80, 0x3}) (async)
ioctl$DRM_IOCTL_MODE_DESTROY_DUMB(r0, 0xc00464b4, &(0x7f0000000040)={r1})

program crashed: KASAN: slab-use-after-free Read in drm_gem_object_release_handle
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000180), 0x1, 0x0)
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064b2, &(0x7f00000029c0)={0x6, 0x8000005, 0x9, 0x0, <r1=>0x0})
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064d2, &(0x7f0000000080)={0x1, 0x80, 0x3}) (async)
ioctl$DRM_IOCTL_MODE_DESTROY_DUMB(r0, 0xc00464b4, &(0x7f0000000040)={r1})

program crashed: KASAN: slab-use-after-free Read in drm_gem_object_release_handle
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true 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}}): syz_open_dev$dri-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_CREATE_DUMB-ioctl$DRM_IOCTL_MODE_DESTROY_DUMB
detailed listing:
executing program 0:
r0 = syz_open_dev$dri(&(0x7f0000000180), 0x1, 0x0)
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064b2, &(0x7f00000029c0)={0x6, 0x8000005, 0x9, 0x0, <r1=>0x0})
ioctl$DRM_IOCTL_MODE_CREATE_DUMB(r0, 0xc02064d2, &(0x7f0000000080)={0x1, 0x80, 0x3}) (async)
ioctl$DRM_IOCTL_MODE_DESTROY_DUMB(r0, 0xc00464b4, &(0x7f0000000040)={r1})

program crashed: KASAN: slab-use-after-free Read in drm_gem_object_release_handle
validation run: crashed=true
reproducing took 1h16m16.948166689s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in drm_gem_object_release_handle+0x4b/0x1e0 drivers/gpu/drm/drm_gem.c:374
Read of size 8 at addr ffff88802a656a78 by task syz.0.151/6423

CPU: 0 UID: 0 PID: 6423 Comm: syz.0.151 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 drm_gem_object_release_handle+0x4b/0x1e0 drivers/gpu/drm/drm_gem.c:374
 idr_for_each+0x1c6/0x2a0 lib/idr.c:210
 drm_gem_release+0x28/0x40 drivers/gpu/drm/drm_gem.c:1106
 drm_file_free+0x729/0xa00 drivers/gpu/drm/drm_file.c:261
 drm_close_helper drivers/gpu/drm/drm_file.c:290 [inline]
 drm_release+0x2de/0x3f0 drivers/gpu/drm/drm_file.c:438
 __fput+0x44f/0xa60 fs/file_table.c:473
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:269 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:328 [inline]
 do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdc4cd9c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcd2b76c68 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffcd2b76d50 RCX: 00007fdc4cd9c819
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000001a2a7 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b30220000 R11: 0000000000000246 R12: 00007ffcd2b76d90
R13: 00007fdc4d01609c R14: 000000000001a2dc R15: 00007fdc4d016090
 </TASK>

Allocated by task 6424:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __kmalloc_cache_noprof+0x31c/0x660 mm/slub.c:5412
 kmalloc_noprof include/linux/slab.h:950 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 __drm_gem_shmem_create+0xc4/0x2e0 drivers/gpu/drm/drm_gem_shmem_helper.c:130
 drm_gem_shmem_create drivers/gpu/drm/drm_gem_shmem_helper.c:157 [inline]
 drm_gem_shmem_create_with_handle drivers/gpu/drm/drm_gem_shmem_helper.c:464 [inline]
 drm_gem_shmem_dumb_create+0x72/0x120 drivers/gpu/drm/drm_gem_shmem_helper.c:553
 drm_mode_create_dumb drivers/gpu/drm/drm_dumb_buffers.c:227 [inline]
 drm_mode_create_dumb_ioctl+0x2bd/0x340 drivers/gpu/drm/drm_dumb_buffers.c:236
 drm_ioctl_kernel+0x2df/0x3b0 drivers/gpu/drm/drm_ioctl.c:804
 drm_ioctl+0x6ba/0xb80 drivers/gpu/drm/drm_ioctl.c:901
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 6425:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2689 [inline]
 slab_free mm/slub.c:6242 [inline]
 kfree+0x1c5/0x640 mm/slub.c:6557
 drm_gem_object_release_handle+0xc2/0x1e0 drivers/gpu/drm/drm_gem.c:385
 drm_gem_handle_delete+0x7b/0xb0 drivers/gpu/drm/drm_gem.c:413
 drm_ioctl_kernel+0x2df/0x3b0 drivers/gpu/drm/drm_ioctl.c:804
 drm_ioctl+0x6ba/0xb80 drivers/gpu/drm/drm_ioctl.c:901
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88802a656800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 632 bytes inside of
 freed 1024-byte region [ffff88802a656800, ffff88802a656c00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88802a657800 pfn:0x2a650
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88813fe34dc0 ffffea0000c24c10 ffffea0000a45e10
raw: ffff88802a657800 000000080010000d 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88813fe34dc0 ffffea0000c24c10 ffffea0000a45e10
head: ffff88802a657800 000000080010000d 00000000f5000000 0000000000000000
head: 00fff00000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2000(__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 181, tgid 181 (kworker/u8:6), ts 12050149001, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1858
 prep_new_page mm/page_alloc.c:1866 [inline]
 get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226
 alloc_slab_page mm/slub.c:3278 [inline]
 allocate_slab+0x77/0x660 mm/slub.c:3467
 new_slab mm/slub.c:3525 [inline]
 refill_objects+0x339/0x3d0 mm/slub.c:7247
 refill_sheaf mm/slub.c:2816 [inline]
 __pcs_replace_empty_main+0x321/0x720 mm/slub.c:4651
 alloc_from_pcs mm/slub.c:4749 [inline]
 slab_alloc_node mm/slub.c:4883 [inline]
 __kmalloc_cache_node_noprof+0x465/0x6b0 mm/slub.c:5420
 kmalloc_node_noprof include/linux/slab.h:1077 [inline]
 blk_mq_alloc_hctx block/blk-mq.c:4054 [inline]
 blk_mq_alloc_and_init_hctx+0x17e/0xc50 block/blk-mq.c:4554
 __blk_mq_realloc_hw_ctxs+0x2bd/0x670 block/blk-mq.c:4605
 blk_mq_realloc_hw_ctxs block/blk-mq.c:4642 [inline]
 blk_mq_init_allocated_queue+0x365/0x13e0 block/blk-mq.c:4672
 blk_mq_alloc_queue+0x1ba/0x2e0 block/blk-mq.c:4454
 scsi_alloc_sdev+0x7c0/0xc80 drivers/scsi/scsi_scan.c:339
 scsi_probe_and_add_lun+0x200/0x48e0 drivers/scsi/scsi_scan.c:1215
 __scsi_scan_target+0x1f0/0xe10 drivers/scsi/scsi_scan.c:1786
 scsi_scan_channel drivers/scsi/scsi_scan.c:1874 [inline]
 scsi_scan_host_selected+0x3d0/0x780 drivers/scsi/scsi_scan.c:1903
 do_scsi_scan_host drivers/scsi/scsi_scan.c:2036 [inline]
 do_scan_async+0x124/0x6f0 drivers/scsi/scsi_scan.c:2046
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88802a656900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802a656980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802a656a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                                ^
 ffff88802a656a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802a656b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in drm_gem_object_release_handle+0x4b/0x1e0 drivers/gpu/drm/drm_gem.c:374
Read of size 8 at addr ffff88802a656a78 by task syz.0.151/6423

CPU: 0 UID: 0 PID: 6423 Comm: syz.0.151 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_address_description+0x55/0x1e0 mm/kasan/report.c:378
 print_report+0x58/0x70 mm/kasan/report.c:482
 kasan_report+0x117/0x150 mm/kasan/report.c:595
 drm_gem_object_release_handle+0x4b/0x1e0 drivers/gpu/drm/drm_gem.c:374
 idr_for_each+0x1c6/0x2a0 lib/idr.c:210
 drm_gem_release+0x28/0x40 drivers/gpu/drm/drm_gem.c:1106
 drm_file_free+0x729/0xa00 drivers/gpu/drm/drm_file.c:261
 drm_close_helper drivers/gpu/drm/drm_file.c:290 [inline]
 drm_release+0x2de/0x3f0 drivers/gpu/drm/drm_file.c:438
 __fput+0x44f/0xa60 fs/file_table.c:473
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:238 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:269 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:328 [inline]
 do_syscall_64+0x33e/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fdc4cd9c819
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffcd2b76c68 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007ffcd2b76d50 RCX: 00007fdc4cd9c819
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 000000000001a2a7 R08: 0000000000000001 R09: 0000000000000000
R10: 0000001b30220000 R11: 0000000000000246 R12: 00007ffcd2b76d90
R13: 00007fdc4d01609c R14: 000000000001a2dc R15: 00007fdc4d016090
 </TASK>

Allocated by task 6424:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
 kasan_kmalloc include/linux/kasan.h:263 [inline]
 __kmalloc_cache_noprof+0x31c/0x660 mm/slub.c:5412
 kmalloc_noprof include/linux/slab.h:950 [inline]
 kzalloc_noprof include/linux/slab.h:1188 [inline]
 __drm_gem_shmem_create+0xc4/0x2e0 drivers/gpu/drm/drm_gem_shmem_helper.c:130
 drm_gem_shmem_create drivers/gpu/drm/drm_gem_shmem_helper.c:157 [inline]
 drm_gem_shmem_create_with_handle drivers/gpu/drm/drm_gem_shmem_helper.c:464 [inline]
 drm_gem_shmem_dumb_create+0x72/0x120 drivers/gpu/drm/drm_gem_shmem_helper.c:553
 drm_mode_create_dumb drivers/gpu/drm/drm_dumb_buffers.c:227 [inline]
 drm_mode_create_dumb_ioctl+0x2bd/0x340 drivers/gpu/drm/drm_dumb_buffers.c:236
 drm_ioctl_kernel+0x2df/0x3b0 drivers/gpu/drm/drm_ioctl.c:804
 drm_ioctl+0x6ba/0xb80 drivers/gpu/drm/drm_ioctl.c:901
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 6425:
 kasan_save_stack mm/kasan/common.c:57 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:253 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:285
 kasan_slab_free include/linux/kasan.h:235 [inline]
 slab_free_hook mm/slub.c:2689 [inline]
 slab_free mm/slub.c:6242 [inline]
 kfree+0x1c5/0x640 mm/slub.c:6557
 drm_gem_object_release_handle+0xc2/0x1e0 drivers/gpu/drm/drm_gem.c:385
 drm_gem_handle_delete+0x7b/0xb0 drivers/gpu/drm/drm_gem.c:413
 drm_ioctl_kernel+0x2df/0x3b0 drivers/gpu/drm/drm_ioctl.c:804
 drm_ioctl+0x6ba/0xb80 drivers/gpu/drm/drm_ioctl.c:901
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x15f/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88802a656800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 632 bytes inside of
 freed 1024-byte region [ffff88802a656800, ffff88802a656c00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88802a657800 pfn:0x2a650
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88813fe34dc0 ffffea0000c24c10 ffffea0000a45e10
raw: ffff88802a657800 000000080010000d 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88813fe34dc0 ffffea0000c24c10 ffffea0000a45e10
head: ffff88802a657800 000000080010000d 00000000f5000000 0000000000000000
head: 00fff00000000003 fffffffffffffe01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2000(__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 181, tgid 181 (kworker/u8:6), ts 12050149001, free_ts 0
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x231/0x280 mm/page_alloc.c:1858
 prep_new_page mm/page_alloc.c:1866 [inline]
 get_page_from_freelist+0x24ba/0x2540 mm/page_alloc.c:3946
 __alloc_frozen_pages_noprof+0x18d/0x380 mm/page_alloc.c:5226
 alloc_slab_page mm/slub.c:3278 [inline]
 allocate_slab+0x77/0x660 mm/slub.c:3467
 new_slab mm/slub.c:3525 [inline]
 refill_objects+0x339/0x3d0 mm/slub.c:7247
 refill_sheaf mm/slub.c:2816 [inline]
 __pcs_replace_empty_main+0x321/0x720 mm/slub.c:4651
 alloc_from_pcs mm/slub.c:4749 [inline]
 slab_alloc_node mm/slub.c:4883 [inline]
 __kmalloc_cache_node_noprof+0x465/0x6b0 mm/slub.c:5420
 kmalloc_node_noprof include/linux/slab.h:1077 [inline]
 blk_mq_alloc_hctx block/blk-mq.c:4054 [inline]
 blk_mq_alloc_and_init_hctx+0x17e/0xc50 block/blk-mq.c:4554
 __blk_mq_realloc_hw_ctxs+0x2bd/0x670 block/blk-mq.c:4605
 blk_mq_realloc_hw_ctxs block/blk-mq.c:4642 [inline]
 blk_mq_init_allocated_queue+0x365/0x13e0 block/blk-mq.c:4672
 blk_mq_alloc_queue+0x1ba/0x2e0 block/blk-mq.c:4454
 scsi_alloc_sdev+0x7c0/0xc80 drivers/scsi/scsi_scan.c:339
 scsi_probe_and_add_lun+0x200/0x48e0 drivers/scsi/scsi_scan.c:1215
 __scsi_scan_target+0x1f0/0xe10 drivers/scsi/scsi_scan.c:1786
 scsi_scan_channel drivers/scsi/scsi_scan.c:1874 [inline]
 scsi_scan_host_selected+0x3d0/0x780 drivers/scsi/scsi_scan.c:1903
 do_scsi_scan_host drivers/scsi/scsi_scan.c:2036 [inline]
 do_scan_async+0x124/0x6f0 drivers/scsi/scsi_scan.c:2046
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88802a656900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802a656980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88802a656a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                                ^
 ffff88802a656a80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802a656b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================