Extracting prog: 1m26.798691753s
Minimizing prog: 8m55.300092807s
Simplifying prog options: 0s
Extracting C: 42.808968052s
Simplifying C: 9m3.323583789s


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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
detailed listing:
executing program 0:
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='task\x00')
fchdir(r0)
r1 = syz_clone(0x1000000, 0x0, 0xfffffd11, 0x0, 0x0, 0x0)
mount(0x0, &(0x7f0000000080)='.\x00', &(0x7f0000000000)='proc\x00', 0x0, 0x0)
r2 = syz_open_procfs$pagemap(r1, &(0x7f0000000100))
ioctl$PAGEMAP_SCAN(r2, 0xc0606610, &(0x7f0000000280)={0x60, 0x1, &(0x7f0000ffa000/0x3000)=nil, &(0x7f0000ffc000/0x3000)=nil, 0x8, 0x0, 0x0, 0x7ff, 0x11, 0x16, 0xa, 0x2e})

program crashed: KASAN: null-ptr-deref Write in do_pagemap_cmd
single: successfully extracted reproducer
found reproducer with 6 syscalls
minimizing guilty program
testing program (duration=35.961121921s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap
detailed listing:
executing program 0:
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='task\x00')
fchdir(r0)
r1 = syz_clone(0x1000000, 0x0, 0xfffffd11, 0x0, 0x0, 0x0)
mount(0x0, &(0x7f0000000080)='.\x00', &(0x7f0000000000)='proc\x00', 0x0, 0x0)
syz_open_procfs$pagemap(r1, &(0x7f0000000100))

program did not crash
testing program (duration=35.961121921s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-ioctl$PAGEMAP_SCAN
detailed listing:
executing program 0:
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='task\x00')
fchdir(r0)
syz_clone(0x1000000, 0x0, 0xfffffd11, 0x0, 0x0, 0x0)
mount(0x0, &(0x7f0000000080)='.\x00', &(0x7f0000000000)='proc\x00', 0x0, 0x0)
ioctl$PAGEMAP_SCAN(0xffffffffffffffff, 0xc0606610, &(0x7f0000000280)={0x60, 0x1, &(0x7f0000ffa000/0x3000)=nil, &(0x7f0000ffc000/0x3000)=nil, 0x8, 0x0, 0x0, 0x7ff, 0x11, 0x16, 0xa, 0x2e})

program did not crash
testing program (duration=35.961121921s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
detailed listing:
executing program 0:
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='task\x00')
fchdir(r0)
r1 = syz_clone(0x1000000, 0x0, 0xfffffd11, 0x0, 0x0, 0x0)
r2 = syz_open_procfs$pagemap(r1, &(0x7f0000000100))
ioctl$PAGEMAP_SCAN(r2, 0xc0606610, &(0x7f0000000280)={0x60, 0x1, &(0x7f0000ffa000/0x3000)=nil, &(0x7f0000ffc000/0x3000)=nil, 0x8, 0x0, 0x0, 0x7ff, 0x11, 0x16, 0xa, 0x2e})

program did not crash
testing program (duration=35.961121921s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
detailed listing:
executing program 0:
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='task\x00')
fchdir(r0)
mount(0x0, &(0x7f0000000080)='.\x00', &(0x7f0000000000)='proc\x00', 0x0, 0x0)
r1 = syz_open_procfs$pagemap(0x0, &(0x7f0000000100))
ioctl$PAGEMAP_SCAN(r1, 0xc0606610, &(0x7f0000000280)={0x60, 0x1, &(0x7f0000ffa000/0x3000)=nil, &(0x7f0000ffc000/0x3000)=nil, 0x8, 0x0, 0x0, 0x7ff, 0x11, 0x16, 0xa, 0x2e})

program did not crash
testing program (duration=35.961121921s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
detailed listing:
executing program 0:
syz_open_procfs(0x0, &(0x7f00000000c0)='task\x00')
r0 = syz_clone(0x1000000, 0x0, 0xfffffd11, 0x0, 0x0, 0x0)
mount(0x0, &(0x7f0000000080)='.\x00', &(0x7f0000000000)='proc\x00', 0x0, 0x0)
r1 = syz_open_procfs$pagemap(r0, &(0x7f0000000100))
ioctl$PAGEMAP_SCAN(r1, 0xc0606610, &(0x7f0000000280)={0x60, 0x1, &(0x7f0000ffa000/0x3000)=nil, &(0x7f0000ffc000/0x3000)=nil, 0x8, 0x0, 0x0, 0x7ff, 0x11, 0x16, 0xa, 0x2e})

program did not crash
testing program (duration=35.961121921s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
detailed listing:
executing program 0:
fchdir(0xffffffffffffffff)
r0 = syz_clone(0x1000000, 0x0, 0xfffffd11, 0x0, 0x0, 0x0)
mount(0x0, &(0x7f0000000080)='.\x00', &(0x7f0000000000)='proc\x00', 0x0, 0x0)
r1 = syz_open_procfs$pagemap(r0, &(0x7f0000000100))
ioctl$PAGEMAP_SCAN(r1, 0xc0606610, &(0x7f0000000280)={0x60, 0x1, &(0x7f0000ffa000/0x3000)=nil, &(0x7f0000ffc000/0x3000)=nil, 0x8, 0x0, 0x0, 0x7ff, 0x11, 0x16, 0xa, 0x2e})

program did not crash
testing program (duration=35.961121921s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
detailed listing:
executing program 0:
r0 = syz_open_procfs(0x0, 0x0)
fchdir(r0)
r1 = syz_clone(0x1000000, 0x0, 0xfffffd11, 0x0, 0x0, 0x0)
mount(0x0, &(0x7f0000000080)='.\x00', &(0x7f0000000000)='proc\x00', 0x0, 0x0)
r2 = syz_open_procfs$pagemap(r1, &(0x7f0000000100))
ioctl$PAGEMAP_SCAN(r2, 0xc0606610, &(0x7f0000000280)={0x60, 0x1, &(0x7f0000ffa000/0x3000)=nil, &(0x7f0000ffc000/0x3000)=nil, 0x8, 0x0, 0x0, 0x7ff, 0x11, 0x16, 0xa, 0x2e})

program did not crash
testing program (duration=35.961121921s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
detailed listing:
executing program 0:
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='task\x00')
fchdir(r0)
r1 = syz_clone(0x1000000, 0x0, 0xfffffd11, 0x0, 0x0, 0x0)
mount(0x0, 0x0, &(0x7f0000000000)='proc\x00', 0x0, 0x0)
r2 = syz_open_procfs$pagemap(r1, &(0x7f0000000100))
ioctl$PAGEMAP_SCAN(r2, 0xc0606610, &(0x7f0000000280)={0x60, 0x1, &(0x7f0000ffa000/0x3000)=nil, &(0x7f0000ffc000/0x3000)=nil, 0x8, 0x0, 0x0, 0x7ff, 0x11, 0x16, 0xa, 0x2e})

program did not crash
testing program (duration=35.961121921s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
detailed listing:
executing program 0:
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='task\x00')
fchdir(r0)
r1 = syz_clone(0x1000000, 0x0, 0xfffffd11, 0x0, 0x0, 0x0)
mount(0x0, &(0x7f0000000080)='.\x00', 0x0, 0x0, 0x0)
r2 = syz_open_procfs$pagemap(r1, &(0x7f0000000100))
ioctl$PAGEMAP_SCAN(r2, 0xc0606610, &(0x7f0000000280)={0x60, 0x1, &(0x7f0000ffa000/0x3000)=nil, &(0x7f0000ffc000/0x3000)=nil, 0x8, 0x0, 0x0, 0x7ff, 0x11, 0x16, 0xa, 0x2e})

program did not crash
testing program (duration=35.961121921s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
detailed listing:
executing program 0:
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='task\x00')
fchdir(r0)
r1 = syz_clone(0x1000000, 0x0, 0xfffffd11, 0x0, 0x0, 0x0)
mount(0x0, &(0x7f0000000080)='.\x00', &(0x7f0000000000)='proc\x00', 0x0, 0x0)
r2 = syz_open_procfs$pagemap(r1, 0x0)
ioctl$PAGEMAP_SCAN(r2, 0xc0606610, &(0x7f0000000280)={0x60, 0x1, &(0x7f0000ffa000/0x3000)=nil, &(0x7f0000ffc000/0x3000)=nil, 0x8, 0x0, 0x0, 0x7ff, 0x11, 0x16, 0xa, 0x2e})

program did not crash
testing program (duration=35.961121921s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
detailed listing:
executing program 0:
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='task\x00')
fchdir(r0)
r1 = syz_clone(0x1000000, 0x0, 0xfffffd11, 0x0, 0x0, 0x0)
mount(0x0, &(0x7f0000000080)='.\x00', &(0x7f0000000000)='proc\x00', 0x0, 0x0)
r2 = syz_open_procfs$pagemap(r1, &(0x7f0000000100))
ioctl$PAGEMAP_SCAN(r2, 0xc0606610, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=35.961121921s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
program crashed: KASAN: null-ptr-deref Write in do_pagemap_cmd
simplifying C reproducer
testing compiled C program (duration=35.961121921s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
program crashed: KASAN: null-ptr-deref Write in do_pagemap_cmd
testing compiled C program (duration=35.961121921s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
program crashed: KASAN: null-ptr-deref Write in do_pagemap_cmd
testing compiled C program (duration=35.961121921s, {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}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
program did not crash
testing compiled C program (duration=35.961121921s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
program crashed: KASAN: null-ptr-deref Write in do_pagemap_cmd
testing compiled C program (duration=35.961121921s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
program crashed: KASAN: null-ptr-deref Write in do_pagemap_cmd
testing compiled C program (duration=35.961121921s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
program did not crash
testing compiled C program (duration=35.961121921s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
program crashed: KASAN: null-ptr-deref Write in do_pagemap_cmd
testing compiled C program (duration=35.961121921s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
program crashed: KASAN: null-ptr-deref Write in do_pagemap_cmd
testing compiled C program (duration=35.961121921s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
program did not crash
testing compiled C program (duration=35.961121921s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
program did not crash
testing compiled C program (duration=35.961121921s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
program did not crash
testing compiled C program (duration=35.961121921s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true 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_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
program crashed: KASAN: null-ptr-deref Write in do_pagemap_cmd
testing program (duration=35.961121921s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true 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_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
detailed listing:
executing program 0:
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='task\x00')
fchdir(r0)
r1 = syz_clone(0x1000000, 0x0, 0xfffffd11, 0x0, 0x0, 0x0)
mount(0x0, &(0x7f0000000080)='.\x00', &(0x7f0000000000)='proc\x00', 0x0, 0x0)
r2 = syz_open_procfs$pagemap(r1, &(0x7f0000000100))
ioctl$PAGEMAP_SCAN(r2, 0xc0606610, &(0x7f0000000280)={0x60, 0x1, &(0x7f0000ffa000/0x3000)=nil, &(0x7f0000ffc000/0x3000)=nil, 0x8, 0x0, 0x0, 0x7ff, 0x11, 0x16, 0xa, 0x2e})

program crashed: KASAN: null-ptr-deref Write in do_pagemap_cmd
validation run: crashed=true
testing program (duration=35.961121921s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true 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_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
detailed listing:
executing program 0:
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='task\x00')
fchdir(r0)
r1 = syz_clone(0x1000000, 0x0, 0xfffffd11, 0x0, 0x0, 0x0)
mount(0x0, &(0x7f0000000080)='.\x00', &(0x7f0000000000)='proc\x00', 0x0, 0x0)
r2 = syz_open_procfs$pagemap(r1, &(0x7f0000000100))
ioctl$PAGEMAP_SCAN(r2, 0xc0606610, &(0x7f0000000280)={0x60, 0x1, &(0x7f0000ffa000/0x3000)=nil, &(0x7f0000ffc000/0x3000)=nil, 0x8, 0x0, 0x0, 0x7ff, 0x11, 0x16, 0xa, 0x2e})

program crashed: KASAN: null-ptr-deref Write in do_pagemap_cmd
validation run: crashed=true
testing program (duration=35.961121921s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:true 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_procfs-fchdir-syz_clone-mount-syz_open_procfs$pagemap-ioctl$PAGEMAP_SCAN
detailed listing:
executing program 0:
r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='task\x00')
fchdir(r0)
r1 = syz_clone(0x1000000, 0x0, 0xfffffd11, 0x0, 0x0, 0x0)
mount(0x0, &(0x7f0000000080)='.\x00', &(0x7f0000000000)='proc\x00', 0x0, 0x0)
r2 = syz_open_procfs$pagemap(r1, &(0x7f0000000100))
ioctl$PAGEMAP_SCAN(r2, 0xc0606610, &(0x7f0000000280)={0x60, 0x1, &(0x7f0000ffa000/0x3000)=nil, &(0x7f0000ffc000/0x3000)=nil, 0x8, 0x0, 0x0, 0x7ff, 0x11, 0x16, 0xa, 0x2e})

program crashed: KASAN: null-ptr-deref Write in do_pagemap_cmd
validation run: crashed=true
reproducing took 22m25.219369123s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: null-ptr-deref in atomic_long_add_return_acquire include/linux/atomic/atomic-instrumented.h:3297 [inline]
BUG: KASAN: null-ptr-deref in rwsem_read_trylock+0x7e/0x660 kernel/locking/rwsem.c:259
Write of size 8 at addr 0000000000000098 by task syz.2.17/381

CPU: 0 UID: 0 PID: 381 Comm: syz.2.17 Not tainted syzkaller #0 7889a62797c5970a6d86d60f5314b8c2dceacd81
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
 print_report+0x3d/0x70 mm/kasan/report.c:482
 kasan_report+0x163/0x1a0 mm/kasan/report.c:592
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x299/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x18/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
 atomic_long_add_return_acquire include/linux/atomic/atomic-instrumented.h:3297 [inline]
 rwsem_read_trylock+0x7e/0x660 kernel/locking/rwsem.c:259
 __down_read_common kernel/locking/rwsem.c:1316 [inline]
 __down_read_killable kernel/locking/rwsem.c:1340 [inline]
 down_read_killable+0x79/0xf0 kernel/locking/rwsem.c:1630
 mmap_read_lock_killable include/linux/mmap_lock.h:193 [inline]
 do_pagemap_scan fs/proc/task_mmu.c:2867 [inline]
 do_pagemap_cmd+0x598/0xc20 fs/proc/task_mmu.c:2920
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x132/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f70fe38ebe9
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:00007ffd189251d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f70fe5c5fa0 RCX: 00007f70fe38ebe9
RDX: 0000200000000280 RSI: 00000000c0606610 RDI: 0000000000000004
RBP: 00007f70fe411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f70fe5c5fa0 R14: 00007f70fe5c5fa0 R15: 0000000000000003
 </TASK>
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000098
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 800000012b914067 P4D 800000012b914067 PUD 0 
Oops: Oops: 0002 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 381 Comm: syz.2.17 Tainted: G    B              syzkaller #0 7889a62797c5970a6d86d60f5314b8c2dceacd81
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:arch_atomic64_add_return arch/x86/include/asm/atomic64_64.h:79 [inline]
RIP: 0010:raw_atomic64_add_return_acquire include/linux/atomic/atomic-arch-fallback.h:2723 [inline]
RIP: 0010:raw_atomic_long_add_return_acquire include/linux/atomic/atomic-long.h:163 [inline]
RIP: 0010:atomic_long_add_return_acquire include/linux/atomic/atomic-instrumented.h:3298 [inline]
RIP: 0010:rwsem_read_trylock+0x89/0x660 kernel/locking/rwsem.c:259
Code: b8 f1 f1 f1 f1 04 f3 f3 f3 49 89 04 1c c7 44 24 40 00 00 00 00 be 08 00 00 00 e8 42 cb 76 00 41 bd 00 01 00 00 4c 89 7c 24 18 <f0> 4d 0f c1 2f 49 81 c5 00 01 00 00 4d 89 f7 49 c1 ef 03 41 80 3c
RSP: 0018:ffffc90000f1fb20 EFLAGS: 00010246
RAX: ffff8881162e8000 RBX: dffffc0000000000 RCX: ffff8881162e8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000f1fbd0 R08: ffffffff8896f947 R09: 1ffffffff112df28
R10: dffffc0000000000 R11: fffffbfff112df29 R12: 1ffff920001e3f68
R13: 0000000000000100 R14: ffffc90000f1fc00 R15: 0000000000000098
FS:  000055556f718500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000098 CR3: 0000000116b6a000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 __down_read_common kernel/locking/rwsem.c:1316 [inline]
 __down_read_killable kernel/locking/rwsem.c:1340 [inline]
 down_read_killable+0x79/0xf0 kernel/locking/rwsem.c:1630
 mmap_read_lock_killable include/linux/mmap_lock.h:193 [inline]
 do_pagemap_scan fs/proc/task_mmu.c:2867 [inline]
 do_pagemap_cmd+0x598/0xc20 fs/proc/task_mmu.c:2920
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x132/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f70fe38ebe9
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:00007ffd189251d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f70fe5c5fa0 RCX: 00007f70fe38ebe9
RDX: 0000200000000280 RSI: 00000000c0606610 RDI: 0000000000000004
RBP: 00007f70fe411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f70fe5c5fa0 R14: 00007f70fe5c5fa0 R15: 0000000000000003
 </TASK>
Modules linked in:
CR2: 0000000000000098
---[ end trace 0000000000000000 ]---
RIP: 0010:arch_atomic64_add_return arch/x86/include/asm/atomic64_64.h:79 [inline]
RIP: 0010:raw_atomic64_add_return_acquire include/linux/atomic/atomic-arch-fallback.h:2723 [inline]
RIP: 0010:raw_atomic_long_add_return_acquire include/linux/atomic/atomic-long.h:163 [inline]
RIP: 0010:atomic_long_add_return_acquire include/linux/atomic/atomic-instrumented.h:3298 [inline]
RIP: 0010:rwsem_read_trylock+0x89/0x660 kernel/locking/rwsem.c:259
Code: b8 f1 f1 f1 f1 04 f3 f3 f3 49 89 04 1c c7 44 24 40 00 00 00 00 be 08 00 00 00 e8 42 cb 76 00 41 bd 00 01 00 00 4c 89 7c 24 18 <f0> 4d 0f c1 2f 49 81 c5 00 01 00 00 4d 89 f7 49 c1 ef 03 41 80 3c
RSP: 0018:ffffc90000f1fb20 EFLAGS: 00010246
RAX: ffff8881162e8000 RBX: dffffc0000000000 RCX: ffff8881162e8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000f1fbd0 R08: ffffffff8896f947 R09: 1ffffffff112df28
R10: dffffc0000000000 R11: fffffbfff112df29 R12: 1ffff920001e3f68
R13: 0000000000000100 R14: ffffc90000f1fc00 R15: 0000000000000098
FS:  000055556f718500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000098 CR3: 0000000116b6a000 CR4: 00000000003526b0
----------------
Code disassembly (best guess):
   0:	b8 f1 f1 f1 f1       	mov    $0xf1f1f1f1,%eax
   5:	04 f3                	add    $0xf3,%al
   7:	f3 f3 49 89 04 1c    	repz xrelease mov %rax,(%r12,%rbx,1)
   d:	c7 44 24 40 00 00 00 	movl   $0x0,0x40(%rsp)
  14:	00
  15:	be 08 00 00 00       	mov    $0x8,%esi
  1a:	e8 42 cb 76 00       	call   0x76cb61
  1f:	41 bd 00 01 00 00    	mov    $0x100,%r13d
  25:	4c 89 7c 24 18       	mov    %r15,0x18(%rsp)
* 2a:	f0 4d 0f c1 2f       	lock xadd %r13,(%r15) <-- trapping instruction
  2f:	49 81 c5 00 01 00 00 	add    $0x100,%r13
  36:	4d 89 f7             	mov    %r14,%r15
  39:	49 c1 ef 03          	shr    $0x3,%r15
  3d:	41                   	rex.B
  3e:	80                   	.byte 0x80
  3f:	3c                   	.byte 0x3c

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: null-ptr-deref in atomic_long_add_return_acquire include/linux/atomic/atomic-instrumented.h:3297 [inline]
BUG: KASAN: null-ptr-deref in rwsem_read_trylock+0x7e/0x660 kernel/locking/rwsem.c:259
Write of size 8 at addr 0000000000000098 by task syz.2.17/381

CPU: 0 UID: 0 PID: 381 Comm: syz.2.17 Not tainted syzkaller #0 7889a62797c5970a6d86d60f5314b8c2dceacd81
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:94
 dump_stack_lvl+0x10c/0x190 lib/dump_stack.c:120
 print_report+0x3d/0x70 mm/kasan/report.c:482
 kasan_report+0x163/0x1a0 mm/kasan/report.c:592
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x299/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x18/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
 atomic_long_add_return_acquire include/linux/atomic/atomic-instrumented.h:3297 [inline]
 rwsem_read_trylock+0x7e/0x660 kernel/locking/rwsem.c:259
 __down_read_common kernel/locking/rwsem.c:1316 [inline]
 __down_read_killable kernel/locking/rwsem.c:1340 [inline]
 down_read_killable+0x79/0xf0 kernel/locking/rwsem.c:1630
 mmap_read_lock_killable include/linux/mmap_lock.h:193 [inline]
 do_pagemap_scan fs/proc/task_mmu.c:2867 [inline]
 do_pagemap_cmd+0x598/0xc20 fs/proc/task_mmu.c:2920
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x132/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f70fe38ebe9
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:00007ffd189251d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f70fe5c5fa0 RCX: 00007f70fe38ebe9
RDX: 0000200000000280 RSI: 00000000c0606610 RDI: 0000000000000004
RBP: 00007f70fe411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f70fe5c5fa0 R14: 00007f70fe5c5fa0 R15: 0000000000000003
 </TASK>
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000098
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 800000012b914067 P4D 800000012b914067 PUD 0 
Oops: Oops: 0002 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 381 Comm: syz.2.17 Tainted: G    B              syzkaller #0 7889a62797c5970a6d86d60f5314b8c2dceacd81
Tainted: [B]=BAD_PAGE
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
RIP: 0010:arch_atomic64_add_return arch/x86/include/asm/atomic64_64.h:79 [inline]
RIP: 0010:raw_atomic64_add_return_acquire include/linux/atomic/atomic-arch-fallback.h:2723 [inline]
RIP: 0010:raw_atomic_long_add_return_acquire include/linux/atomic/atomic-long.h:163 [inline]
RIP: 0010:atomic_long_add_return_acquire include/linux/atomic/atomic-instrumented.h:3298 [inline]
RIP: 0010:rwsem_read_trylock+0x89/0x660 kernel/locking/rwsem.c:259
Code: b8 f1 f1 f1 f1 04 f3 f3 f3 49 89 04 1c c7 44 24 40 00 00 00 00 be 08 00 00 00 e8 42 cb 76 00 41 bd 00 01 00 00 4c 89 7c 24 18 <f0> 4d 0f c1 2f 49 81 c5 00 01 00 00 4d 89 f7 49 c1 ef 03 41 80 3c
RSP: 0018:ffffc90000f1fb20 EFLAGS: 00010246
RAX: ffff8881162e8000 RBX: dffffc0000000000 RCX: ffff8881162e8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000f1fbd0 R08: ffffffff8896f947 R09: 1ffffffff112df28
R10: dffffc0000000000 R11: fffffbfff112df29 R12: 1ffff920001e3f68
R13: 0000000000000100 R14: ffffc90000f1fc00 R15: 0000000000000098
FS:  000055556f718500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000098 CR3: 0000000116b6a000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 __down_read_common kernel/locking/rwsem.c:1316 [inline]
 __down_read_killable kernel/locking/rwsem.c:1340 [inline]
 down_read_killable+0x79/0xf0 kernel/locking/rwsem.c:1630
 mmap_read_lock_killable include/linux/mmap_lock.h:193 [inline]
 do_pagemap_scan fs/proc/task_mmu.c:2867 [inline]
 do_pagemap_cmd+0x598/0xc20 fs/proc/task_mmu.c:2920
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x132/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0x58/0xf0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f70fe38ebe9
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:00007ffd189251d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f70fe5c5fa0 RCX: 00007f70fe38ebe9
RDX: 0000200000000280 RSI: 00000000c0606610 RDI: 0000000000000004
RBP: 00007f70fe411e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f70fe5c5fa0 R14: 00007f70fe5c5fa0 R15: 0000000000000003
 </TASK>
Modules linked in:
CR2: 0000000000000098
---[ end trace 0000000000000000 ]---
RIP: 0010:arch_atomic64_add_return arch/x86/include/asm/atomic64_64.h:79 [inline]
RIP: 0010:raw_atomic64_add_return_acquire include/linux/atomic/atomic-arch-fallback.h:2723 [inline]
RIP: 0010:raw_atomic_long_add_return_acquire include/linux/atomic/atomic-long.h:163 [inline]
RIP: 0010:atomic_long_add_return_acquire include/linux/atomic/atomic-instrumented.h:3298 [inline]
RIP: 0010:rwsem_read_trylock+0x89/0x660 kernel/locking/rwsem.c:259
Code: b8 f1 f1 f1 f1 04 f3 f3 f3 49 89 04 1c c7 44 24 40 00 00 00 00 be 08 00 00 00 e8 42 cb 76 00 41 bd 00 01 00 00 4c 89 7c 24 18 <f0> 4d 0f c1 2f 49 81 c5 00 01 00 00 4d 89 f7 49 c1 ef 03 41 80 3c
RSP: 0018:ffffc90000f1fb20 EFLAGS: 00010246
RAX: ffff8881162e8000 RBX: dffffc0000000000 RCX: ffff8881162e8000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000f1fbd0 R08: ffffffff8896f947 R09: 1ffffffff112df28
R10: dffffc0000000000 R11: fffffbfff112df29 R12: 1ffff920001e3f68
R13: 0000000000000100 R14: ffffc90000f1fc00 R15: 0000000000000098
FS:  000055556f718500(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000098 CR3: 0000000116b6a000 CR4: 00000000003526b0
----------------
Code disassembly (best guess):
   0:	b8 f1 f1 f1 f1       	mov    $0xf1f1f1f1,%eax
   5:	04 f3                	add    $0xf3,%al
   7:	f3 f3 49 89 04 1c    	repz xrelease mov %rax,(%r12,%rbx,1)
   d:	c7 44 24 40 00 00 00 	movl   $0x0,0x40(%rsp)
  14:	00
  15:	be 08 00 00 00       	mov    $0x8,%esi
  1a:	e8 42 cb 76 00       	call   0x76cb61
  1f:	41 bd 00 01 00 00    	mov    $0x100,%r13d
  25:	4c 89 7c 24 18       	mov    %r15,0x18(%rsp)
* 2a:	f0 4d 0f c1 2f       	lock xadd %r13,(%r15) <-- trapping instruction
  2f:	49 81 c5 00 01 00 00 	add    $0x100,%r13
  36:	4d 89 f7             	mov    %r14,%r15
  39:	49 c1 ef 03          	shr    $0x3,%r15
  3d:	41                   	rex.B
  3e:	80                   	.byte 0x80
  3f:	3c                   	.byte 0x3c