Extracting prog: 1m20.723928835s
Minimizing prog: 12m9.631358735s
Simplifying prog options: 0s
Extracting C: 31.604819142s
Simplifying C: 11m27.795412635s


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: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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$tmpfs-chdir-mkdir-mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$tmpfs(0x0, 0x0, 0x0, 0x0, 0x0)
chdir(0x0)
mkdir(0x0, 0x0)
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
single: successfully extracted reproducer
found reproducer with 7 syscalls
minimizing guilty program
testing program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$tmpfs-chdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$tmpfs(0x0, 0x0, 0x0, 0x0, 0x0)
chdir(0x0)
mkdir(0x0, 0x0)
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)

program did not crash
testing program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$tmpfs-chdir-mkdir-mount$incfs-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$tmpfs(0x0, 0x0, 0x0, 0x0, 0x0)
chdir(0x0)
mkdir(0x0, 0x0)
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program did not crash
testing program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$tmpfs-chdir-mkdir-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$tmpfs(0x0, 0x0, 0x0, 0x0, 0x0)
chdir(0x0)
mkdir(0x0, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program did not crash
testing program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$tmpfs-chdir-mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$tmpfs(0x0, 0x0, 0x0, 0x0, 0x0)
chdir(0x0)
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$tmpfs-mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$tmpfs(0x0, 0x0, 0x0, 0x0, 0x0)
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program did not crash
testing program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$incfs(0x0, &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program did not crash
testing program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$incfs(&(0x7f0000000140)='./file0\x00', 0x0, &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program did not crash
testing program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', 0x0, 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program did not crash
testing program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(0x0, &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program did not crash
testing program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', 0x0, 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program did not crash
testing program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(0x0, &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program did not crash
testing program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', 0x0, 0x0, 0x81105a, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
simplifying C reproducer
testing compiled C program (duration=39.258091174s, {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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=39.258091174s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program did not crash
testing compiled C program (duration=39.258091174s, {Threaded:false 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:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=39.258091174s, {Threaded:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program did not crash
testing compiled C program (duration=39.258091174s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=39.258091174s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=39.258091174s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=39.258091174s, {Threaded:false Repeat:true 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=39.258091174s, {Threaded:false Repeat:true 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=39.258091174s, {Threaded:false Repeat:true 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:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=39.258091174s, {Threaded:false Repeat:true 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:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program did not crash
testing compiled C program (duration=39.258091174s, {Threaded:false Repeat:true 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:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program did not crash
testing compiled C program (duration=39.258091174s, {Threaded:false Repeat:true 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:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing compiled C program (duration=39.258091174s, {Threaded:false Repeat:true 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:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing program (duration=39.258091174s, {Threaded:false Repeat:true 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:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
validation run: crashed=true
testing program (duration=39.258091174s, {Threaded:false Repeat:true 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:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
validation run: crashed=true
testing program (duration=39.258091174s, {Threaded:false Repeat:true 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:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$vfat-mount$incfs-mount$bind-mount$bind
detailed listing:
executing program 0:
syz_mount_image$vfat(&(0x7f0000000000), &(0x7f0000000100)='./file0\x00', 0x0, 0x0, 0x0, 0x0, &(0x7f0000000000))
mount$incfs(&(0x7f0000000140)='./file0\x00', &(0x7f00000000c0)='./file0\x00', &(0x7f0000000040), 0x1000408, 0x0)
mount$bind(&(0x7f00000002c0)='.\x00', &(0x7f0000000200)='./file0/../file0\x00', 0x0, 0x101091, 0x0)
mount$bind(&(0x7f0000000300)='./file0/file0\x00', &(0x7f0000000340)='./file0/file0\x00', 0x0, 0x81105a, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
validation run: crashed=true
reproducing took 28m25.834236316s
repro crashed as (corrupted=false):
R10: 000000000000000a R11: 0000000000000246 R12: 00007ffc953c8550
R13: 00007fb70f8ac925 R14: 000055557ceab4a8 R15: 00007ffc953ca710
 </TASK>
---[ end trace fba742cb2d304be0 ]---
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: null-ptr-deref in atomic_inc_return include/linux/atomic/atomic-instrumented.h:188 [inline]
BUG: KASAN: null-ptr-deref in ihold+0x20/0x60 fs/inode.c:454
Write of size 4 at addr 0000000000000170 by task syz-executor/358

CPU: 0 PID: 358 Comm: syz-executor Tainted: G        W         5.15.188-syzkaller-00606-g6b619c45dff5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106
 __kasan_report mm/kasan/report.c:431 [inline]
 kasan_report+0xe7/0x140 mm/kasan/report.c:444
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x280/0x290 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic_inc_return include/linux/atomic/atomic-instrumented.h:188 [inline]
 ihold+0x20/0x60 fs/inode.c:454
 d_delete_notify include/linux/fsnotify.h:275 [inline]
 vfs_rmdir+0x1f0/0x460 fs/namei.c:4162
 incfs_kill_sb+0x105/0x220 fs/incfs/vfs.c:1989
 deactivate_locked_super+0xa0/0x100 fs/super.c:335
 deactivate_super+0xaf/0xe0 fs/super.c:366
 cleanup_mnt+0x446/0x500 fs/namespace.c:1139
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1146
 task_work_run+0x127/0x190 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xa7e/0x27a0 kernel/exit.c:889
 do_group_exit+0x141/0x310 kernel/exit.c:1003
 __do_sys_exit_group kernel/exit.c:1014 [inline]
 __se_sys_exit_group kernel/exit.c:1012 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1012
 x64_sys_call+0x832/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb70f82a929
Code: Unable to access opcode bytes at RIP 0x7fb70f82a8ff.
RSP: 002b:00007ffc953c7298 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fb70f8ac997 RCX: 00007fb70f82a929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000016 R08: 00007ffc953c5036 R09: 00007ffc953c8550
R10: 000000000000000a R11: 0000000000000246 R12: 00007ffc953c8550
R13: 00007fb70f8ac925 R14: 000055557ceab4a8 R15: 00007ffc953ca710
 </TASK>
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000170
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 122a5f067 P4D 122a5f067 PUD 122a5d067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 358 Comm: syz-executor Tainted: G    B   W         5.15.188-syzkaller-00606-g6b619c45dff5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:165 [inline]
RIP: 0010:arch_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:370 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:189 [inline]
RIP: 0010:ihold+0x26/0x60 fs/inode.c:454
Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 31 ba b3 ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 30 33 f2 ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 70 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 b1
RSP: 0018:ffffc90000a97b68 EFLAGS: 00010246
RAX: ffff88812a7b9300 RBX: 0000000000000000 RCX: ffff88812a7b93c0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: ffffc90000a97b78 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff0e17c4c R11: 1ffffffff0e17c4c R12: 1ffff1102199b06c
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 000000011f925000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 d_delete_notify include/linux/fsnotify.h:275 [inline]
 vfs_rmdir+0x1f0/0x460 fs/namei.c:4162
 incfs_kill_sb+0x105/0x220 fs/incfs/vfs.c:1989
 deactivate_locked_super+0xa0/0x100 fs/super.c:335
 deactivate_super+0xaf/0xe0 fs/super.c:366
 cleanup_mnt+0x446/0x500 fs/namespace.c:1139
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1146
 task_work_run+0x127/0x190 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xa7e/0x27a0 kernel/exit.c:889
 do_group_exit+0x141/0x310 kernel/exit.c:1003
 __do_sys_exit_group kernel/exit.c:1014 [inline]
 __se_sys_exit_group kernel/exit.c:1012 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1012
 x64_sys_call+0x832/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb70f82a929
Code: Unable to access opcode bytes at RIP 0x7fb70f82a8ff.
RSP: 002b:00007ffc953c7298 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fb70f8ac997 RCX: 00007fb70f82a929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000016 R08: 00007ffc953c5036 R09: 00007ffc953c8550
R10: 000000000000000a R11: 0000000000000246 R12: 00007ffc953c8550
R13: 00007fb70f8ac925 R14: 000055557ceab4a8 R15: 00007ffc953ca710
 </TASK>
Modules linked in:
CR2: 0000000000000170
---[ end trace fba742cb2d304be1 ]---
RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:165 [inline]
RIP: 0010:arch_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:370 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:189 [inline]
RIP: 0010:ihold+0x26/0x60 fs/inode.c:454
Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 31 ba b3 ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 30 33 f2 ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 70 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 b1
RSP: 0018:ffffc90000a97b68 EFLAGS: 00010246
RAX: ffff88812a7b9300 RBX: 0000000000000000 RCX: ffff88812a7b93c0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: ffffc90000a97b78 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff0e17c4c R11: 1ffffffff0e17c4c R12: 1ffff1102199b06c
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 000000011f925000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	55                   	push   %rbp
   5:	48 89 e5             	mov    %rsp,%rbp
   8:	41 56                	push   %r14
   a:	53                   	push   %rbx
   b:	48 89 fb             	mov    %rdi,%rbx
   e:	e8 31 ba b3 ff       	call   0xffb3ba44
  13:	48 8d bb 70 01 00 00 	lea    0x170(%rbx),%rdi
  1a:	be 04 00 00 00       	mov    $0x4,%esi
  1f:	e8 30 33 f2 ff       	call   0xfff23354
  24:	41 be 01 00 00 00    	mov    $0x1,%r14d
* 2a:	f0 44 0f c1 b3 70 01 	lock xadd %r14d,0x170(%rbx) <-- trapping instruction
  31:	00 00
  33:	41 ff c6             	inc    %r14d
  36:	bf 02 00 00 00       	mov    $0x2,%edi
  3b:	44 89 f6             	mov    %r14d,%esi
  3e:	e8                   	.byte 0xe8
  3f:	b1                   	.byte 0xb1

final repro crashed as (corrupted=false):
R10: 000000000000000a R11: 0000000000000246 R12: 00007ffc953c8550
R13: 00007fb70f8ac925 R14: 000055557ceab4a8 R15: 00007ffc953ca710
 </TASK>
---[ end trace fba742cb2d304be0 ]---
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: null-ptr-deref in atomic_inc_return include/linux/atomic/atomic-instrumented.h:188 [inline]
BUG: KASAN: null-ptr-deref in ihold+0x20/0x60 fs/inode.c:454
Write of size 4 at addr 0000000000000170 by task syz-executor/358

CPU: 0 PID: 358 Comm: syz-executor Tainted: G        W         5.15.188-syzkaller-00606-g6b619c45dff5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 __dump_stack+0x21/0x30 lib/dump_stack.c:88
 dump_stack_lvl+0xee/0x150 lib/dump_stack.c:106
 __kasan_report mm/kasan/report.c:431 [inline]
 kasan_report+0xe7/0x140 mm/kasan/report.c:444
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x280/0x290 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic_inc_return include/linux/atomic/atomic-instrumented.h:188 [inline]
 ihold+0x20/0x60 fs/inode.c:454
 d_delete_notify include/linux/fsnotify.h:275 [inline]
 vfs_rmdir+0x1f0/0x460 fs/namei.c:4162
 incfs_kill_sb+0x105/0x220 fs/incfs/vfs.c:1989
 deactivate_locked_super+0xa0/0x100 fs/super.c:335
 deactivate_super+0xaf/0xe0 fs/super.c:366
 cleanup_mnt+0x446/0x500 fs/namespace.c:1139
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1146
 task_work_run+0x127/0x190 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xa7e/0x27a0 kernel/exit.c:889
 do_group_exit+0x141/0x310 kernel/exit.c:1003
 __do_sys_exit_group kernel/exit.c:1014 [inline]
 __se_sys_exit_group kernel/exit.c:1012 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1012
 x64_sys_call+0x832/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb70f82a929
Code: Unable to access opcode bytes at RIP 0x7fb70f82a8ff.
RSP: 002b:00007ffc953c7298 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fb70f8ac997 RCX: 00007fb70f82a929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000016 R08: 00007ffc953c5036 R09: 00007ffc953c8550
R10: 000000000000000a R11: 0000000000000246 R12: 00007ffc953c8550
R13: 00007fb70f8ac925 R14: 000055557ceab4a8 R15: 00007ffc953ca710
 </TASK>
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000170
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 122a5f067 P4D 122a5f067 PUD 122a5d067 PMD 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 358 Comm: syz-executor Tainted: G    B   W         5.15.188-syzkaller-00606-g6b619c45dff5 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:165 [inline]
RIP: 0010:arch_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:370 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:189 [inline]
RIP: 0010:ihold+0x26/0x60 fs/inode.c:454
Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 31 ba b3 ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 30 33 f2 ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 70 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 b1
RSP: 0018:ffffc90000a97b68 EFLAGS: 00010246
RAX: ffff88812a7b9300 RBX: 0000000000000000 RCX: ffff88812a7b93c0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: ffffc90000a97b78 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff0e17c4c R11: 1ffffffff0e17c4c R12: 1ffff1102199b06c
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 000000011f925000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 d_delete_notify include/linux/fsnotify.h:275 [inline]
 vfs_rmdir+0x1f0/0x460 fs/namei.c:4162
 incfs_kill_sb+0x105/0x220 fs/incfs/vfs.c:1989
 deactivate_locked_super+0xa0/0x100 fs/super.c:335
 deactivate_super+0xaf/0xe0 fs/super.c:366
 cleanup_mnt+0x446/0x500 fs/namespace.c:1139
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1146
 task_work_run+0x127/0x190 kernel/task_work.c:188
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xa7e/0x27a0 kernel/exit.c:889
 do_group_exit+0x141/0x310 kernel/exit.c:1003
 __do_sys_exit_group kernel/exit.c:1014 [inline]
 __se_sys_exit_group kernel/exit.c:1012 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1012
 x64_sys_call+0x832/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:232
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb70f82a929
Code: Unable to access opcode bytes at RIP 0x7fb70f82a8ff.
RSP: 002b:00007ffc953c7298 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fb70f8ac997 RCX: 00007fb70f82a929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001
RBP: 0000000000000016 R08: 00007ffc953c5036 R09: 00007ffc953c8550
R10: 000000000000000a R11: 0000000000000246 R12: 00007ffc953c8550
R13: 00007fb70f8ac925 R14: 000055557ceab4a8 R15: 00007ffc953ca710
 </TASK>
Modules linked in:
CR2: 0000000000000170
---[ end trace fba742cb2d304be1 ]---
RIP: 0010:arch_atomic_add_return arch/x86/include/asm/atomic.h:165 [inline]
RIP: 0010:arch_atomic_inc_return include/linux/atomic/atomic-arch-fallback.h:370 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:189 [inline]
RIP: 0010:ihold+0x26/0x60 fs/inode.c:454
Code: 00 00 00 00 55 48 89 e5 41 56 53 48 89 fb e8 31 ba b3 ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 30 33 f2 ff 41 be 01 00 00 00 <f0> 44 0f c1 b3 70 01 00 00 41 ff c6 bf 02 00 00 00 44 89 f6 e8 b1
RSP: 0018:ffffc90000a97b68 EFLAGS: 00010246
RAX: ffff88812a7b9300 RBX: 0000000000000000 RCX: ffff88812a7b93c0
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 00000000ffffffff
RBP: ffffc90000a97b78 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff0e17c4c R11: 1ffffffff0e17c4c R12: 1ffff1102199b06c
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 000000011f925000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	00 00                	add    %al,(%rax)
   4:	55                   	push   %rbp
   5:	48 89 e5             	mov    %rsp,%rbp
   8:	41 56                	push   %r14
   a:	53                   	push   %rbx
   b:	48 89 fb             	mov    %rdi,%rbx
   e:	e8 31 ba b3 ff       	call   0xffb3ba44
  13:	48 8d bb 70 01 00 00 	lea    0x170(%rbx),%rdi
  1a:	be 04 00 00 00       	mov    $0x4,%esi
  1f:	e8 30 33 f2 ff       	call   0xfff23354
  24:	41 be 01 00 00 00    	mov    $0x1,%r14d
* 2a:	f0 44 0f c1 b3 70 01 	lock xadd %r14d,0x170(%rbx) <-- trapping instruction
  31:	00 00
  33:	41 ff c6             	inc    %r14d
  36:	bf 02 00 00 00       	mov    $0x2,%edi
  3b:	44 89 f6             	mov    %r14d,%esi
  3e:	e8                   	.byte 0xe8
  3f:	b1                   	.byte 0xb1