Extracting prog: 1m46.063312028s
Minimizing prog: 1h4m40.555341131s
Simplifying prog options: 12m5.325170712s
Extracting C: 5m9.56078661s
Simplifying C: 0s


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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getsockopt$sock_buf-sched_setaffinity-sendmsg$nl_xfrm-sendmsg$nl_xfrm-mkdir-mount$bpf-syz_clone-mount$bpf-mount$bpf-mkdir-mount$bpf-mount$incfs
detailed listing:
executing program 0:
getsockopt$sock_buf(0xffffffffffffffff, 0x1, 0x1c, 0x0, &(0x7f00000000c0))
sched_setaffinity(0x0, 0x0, 0x0)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x801}, 0x10)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000480)={0x0}, 0x1, 0x0, 0x0, 0x20008891}, 0x0)
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
mount$bpf(0x0, &(0x7f00000000c0)='./file0/../file0\x00', 0x0, 0x100000, 0x0)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$bpf(0x200000000000, 0x0, 0x0, 0x8b7840, 0x0)
mount$bpf(0x0, &(0x7f0000000040)='./file0\x00', 0x0, 0x84000, 0x0)
mkdir(&(0x7f0000000140)='./file0/../file0\x00', 0x190)
mount$bpf(0x200000000000, &(0x7f0000000000)='./file0\x00', 0x0, 0x989046, 0x0)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

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: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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getsockopt$sock_buf-sched_setaffinity-sendmsg$nl_xfrm-sendmsg$nl_xfrm-mkdir-mount$bpf-syz_clone-mount$bpf-mount$bpf-mkdir-mount$bpf-mount$incfs
detailed listing:
executing program 0:
getsockopt$sock_buf(0xffffffffffffffff, 0x1, 0x1c, 0x0, &(0x7f00000000c0))
sched_setaffinity(0x0, 0x0, 0x0)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x801}, 0x10)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000480)={0x0}, 0x1, 0x0, 0x0, 0x20008891}, 0x0)
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
mount$bpf(0x0, &(0x7f00000000c0)='./file0/../file0\x00', 0x0, 0x100000, 0x0)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$bpf(0x200000000000, 0x0, 0x0, 0x8b7840, 0x0)
mount$bpf(0x0, &(0x7f0000000040)='./file0\x00', 0x0, 0x84000, 0x0)
mkdir(&(0x7f0000000140)='./file0/../file0\x00', 0x190)
mount$bpf(0x200000000000, &(0x7f0000000000)='./file0\x00', 0x0, 0x989046, 0x0)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
single: successfully extracted reproducer
found reproducer with 12 syscalls
minimizing guilty program
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getsockopt$sock_buf-sched_setaffinity-sendmsg$nl_xfrm-sendmsg$nl_xfrm-mkdir-mount$bpf-syz_clone-mount$bpf-mount$bpf-mkdir-mount$bpf
detailed listing:
executing program 0:
getsockopt$sock_buf(0xffffffffffffffff, 0x1, 0x1c, 0x0, &(0x7f00000000c0))
sched_setaffinity(0x0, 0x0, 0x0)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x801}, 0x10)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000480)={0x0}, 0x1, 0x0, 0x0, 0x20008891}, 0x0)
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
mount$bpf(0x0, &(0x7f00000000c0)='./file0/../file0\x00', 0x0, 0x100000, 0x0)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$bpf(0x200000000000, 0x0, 0x0, 0x8b7840, 0x0)
mount$bpf(0x0, &(0x7f0000000040)='./file0\x00', 0x0, 0x84000, 0x0)
mkdir(&(0x7f0000000140)='./file0/../file0\x00', 0x190)
mount$bpf(0x200000000000, &(0x7f0000000000)='./file0\x00', 0x0, 0x989046, 0x0)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getsockopt$sock_buf-sched_setaffinity-sendmsg$nl_xfrm-sendmsg$nl_xfrm-mkdir-mount$bpf-syz_clone-mount$bpf-mount$bpf-mkdir-mount$incfs
detailed listing:
executing program 0:
getsockopt$sock_buf(0xffffffffffffffff, 0x1, 0x1c, 0x0, &(0x7f00000000c0))
sched_setaffinity(0x0, 0x0, 0x0)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x801}, 0x10)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000480)={0x0}, 0x1, 0x0, 0x0, 0x20008891}, 0x0)
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
mount$bpf(0x0, &(0x7f00000000c0)='./file0/../file0\x00', 0x0, 0x100000, 0x0)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$bpf(0x200000000000, 0x0, 0x0, 0x8b7840, 0x0)
mount$bpf(0x0, &(0x7f0000000040)='./file0\x00', 0x0, 0x84000, 0x0)
mkdir(&(0x7f0000000140)='./file0/../file0\x00', 0x190)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getsockopt$sock_buf-sched_setaffinity-sendmsg$nl_xfrm-sendmsg$nl_xfrm-mkdir-mount$bpf-syz_clone-mount$bpf-mount$bpf-mount$incfs
detailed listing:
executing program 0:
getsockopt$sock_buf(0xffffffffffffffff, 0x1, 0x1c, 0x0, &(0x7f00000000c0))
sched_setaffinity(0x0, 0x0, 0x0)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x801}, 0x10)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000480)={0x0}, 0x1, 0x0, 0x0, 0x20008891}, 0x0)
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
mount$bpf(0x0, &(0x7f00000000c0)='./file0/../file0\x00', 0x0, 0x100000, 0x0)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$bpf(0x200000000000, 0x0, 0x0, 0x8b7840, 0x0)
mount$bpf(0x0, &(0x7f0000000040)='./file0\x00', 0x0, 0x84000, 0x0)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getsockopt$sock_buf-sched_setaffinity-sendmsg$nl_xfrm-sendmsg$nl_xfrm-mkdir-mount$bpf-syz_clone-mount$bpf-mount$incfs
detailed listing:
executing program 0:
getsockopt$sock_buf(0xffffffffffffffff, 0x1, 0x1c, 0x0, &(0x7f00000000c0))
sched_setaffinity(0x0, 0x0, 0x0)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x801}, 0x10)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000480)={0x0}, 0x1, 0x0, 0x0, 0x20008891}, 0x0)
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
mount$bpf(0x0, &(0x7f00000000c0)='./file0/../file0\x00', 0x0, 0x100000, 0x0)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$bpf(0x200000000000, 0x0, 0x0, 0x8b7840, 0x0)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getsockopt$sock_buf-sched_setaffinity-sendmsg$nl_xfrm-sendmsg$nl_xfrm-mkdir-mount$bpf-syz_clone-mount$incfs
detailed listing:
executing program 0:
getsockopt$sock_buf(0xffffffffffffffff, 0x1, 0x1c, 0x0, &(0x7f00000000c0))
sched_setaffinity(0x0, 0x0, 0x0)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x801}, 0x10)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000480)={0x0}, 0x1, 0x0, 0x0, 0x20008891}, 0x0)
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
mount$bpf(0x0, &(0x7f00000000c0)='./file0/../file0\x00', 0x0, 0x100000, 0x0)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getsockopt$sock_buf-sched_setaffinity-sendmsg$nl_xfrm-sendmsg$nl_xfrm-mkdir-mount$bpf-mount$incfs
detailed listing:
executing program 0:
getsockopt$sock_buf(0xffffffffffffffff, 0x1, 0x1c, 0x0, &(0x7f00000000c0))
sched_setaffinity(0x0, 0x0, 0x0)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x801}, 0x10)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000480)={0x0}, 0x1, 0x0, 0x0, 0x20008891}, 0x0)
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
mount$bpf(0x0, &(0x7f00000000c0)='./file0/../file0\x00', 0x0, 0x100000, 0x0)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getsockopt$sock_buf-sched_setaffinity-sendmsg$nl_xfrm-sendmsg$nl_xfrm-mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
getsockopt$sock_buf(0xffffffffffffffff, 0x1, 0x1c, 0x0, &(0x7f00000000c0))
sched_setaffinity(0x0, 0x0, 0x0)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x801}, 0x10)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000480)={0x0}, 0x1, 0x0, 0x0, 0x20008891}, 0x0)
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getsockopt$sock_buf-sched_setaffinity-sendmsg$nl_xfrm-sendmsg$nl_xfrm-syz_clone-mount$incfs
detailed listing:
executing program 0:
getsockopt$sock_buf(0xffffffffffffffff, 0x1, 0x1c, 0x0, &(0x7f00000000c0))
sched_setaffinity(0x0, 0x0, 0x0)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x801}, 0x10)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f0000000040)={0x0, 0x0, &(0x7f0000000480)={0x0}, 0x1, 0x0, 0x0, 0x20008891}, 0x0)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getsockopt$sock_buf-sched_setaffinity-sendmsg$nl_xfrm-mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
getsockopt$sock_buf(0xffffffffffffffff, 0x1, 0x1c, 0x0, &(0x7f00000000c0))
sched_setaffinity(0x0, 0x0, 0x0)
sendmsg$nl_xfrm(0xffffffffffffffff, &(0x7f00000004c0)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x801}, 0x10)
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getsockopt$sock_buf-sched_setaffinity-mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
getsockopt$sock_buf(0xffffffffffffffff, 0x1, 0x1c, 0x0, &(0x7f00000000c0))
sched_setaffinity(0x0, 0x0, 0x0)
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): getsockopt$sock_buf-mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
getsockopt$sock_buf(0xffffffffffffffff, 0x1, 0x1c, 0x0, &(0x7f00000000c0))
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
mkdir(0x0, 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(0x0, &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', 0x0, &(0x7f0000000000), 0x82, 0x0)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', 0x0, 0x82, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-syz_clone-mount$incfs
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program did not crash
testing 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: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}}): mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program did not crash
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
validation run: crashed=true
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
validation run: crashed=true
testing program (duration=6m0s, {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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mkdir-syz_clone-mount$incfs
detailed listing:
executing program 0:
mkdir(&(0x7f0000001a80)='./file0\x00', 0x18b)
syz_clone(0x126400, 0x0, 0x0, 0x0, 0x0, 0x0) (async)
mount$incfs(&(0x7f0000000100)='./file0/../file0\x00', &(0x7f0000000180)='./file0/../file0\x00', &(0x7f0000000000), 0x82, 0x0)

program crashed: KASAN: null-ptr-deref Write in vfs_rmdir
validation run: crashed=true
reproducing took 1h26m37.558822976s
repro crashed as (corrupted=false):
RDX: 00007fc19cef49c8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fc19c035024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc19c226038 R14: 00007fc19c225fa0 R15: 00007ffdd01914b8
 </TASK>
---[ end trace 0000000000000000 ]---
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
BUG: KASAN: null-ptr-deref in atomic_inc_return include/linux/atomic/atomic-instrumented.h:198 [inline]
BUG: KASAN: null-ptr-deref in ihold+0x20/0x60 fs/inode.c:455
Write of size 4 at addr 0000000000000170 by task syz.6.1228/5242

CPU: 1 PID: 5242 Comm: syz.6.1228 Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_report+0x3d/0x60 mm/kasan/report.c:423
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
 atomic_inc_return include/linux/atomic/atomic-instrumented.h:198 [inline]
 ihold+0x20/0x60 fs/inode.c:455
 d_delete_notify include/linux/fsnotify.h:289 [inline]
 vfs_rmdir+0x24c/0x4f0 fs/namei.c:4211
 incfs_kill_sb+0x18f/0x210 fs/incfs/vfs.c:1999
 deactivate_locked_super+0xb5/0x120 fs/super.c:336
 deactivate_super+0xaf/0xe0 fs/super.c:367
 cleanup_mnt+0x45e/0x4e0 fs/namespace.c:1192
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1199
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xaf2/0x2850 kernel/exit.c:887
 __do_sys_exit kernel/exit.c:996 [inline]
 __se_sys_exit kernel/exit.c:994 [inline]
 __x64_sys_exit+0x40/0x40 kernel/exit.c:994
 x64_sys_call+0x67/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:61
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc19bf9e0d9
Code: Unable to access opcode bytes at 0x7fc19bf9e0af.
RSP: 002b:00007fc19cef3fd8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 00007fc19c225fa0 RCX: 00007fc19bf9e0d9
RDX: 00007fc19cef49c8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fc19c035024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc19c226038 R14: 00007fc19c225fa0 R15: 00007ffdd01914b8
 </TASK>
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000170
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5242 Comm: syz.6.1228 Tainted: G    B   W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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:440 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:199 [inline]
RIP: 0010:ihold+0x26/0x60 fs/inode.c:455
Code: 33 36 7c df 55 48 89 e5 41 56 53 48 89 fb e8 c1 1e ab ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 00 ac f0 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:ffffc900044afb80 EFLAGS: 00010246
RAX: ffff888117fb5100 RBX: 0000000000000000 RCX: ffff888117fb5100
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900044afb90 R08: ffffffff87b757e7 R09: 1ffffffff0f6eafc
R10: dffffc0000000000 R11: fffffbfff0f6eafd R12: ffff888117799374
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 000000010f34b000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 d_delete_notify include/linux/fsnotify.h:289 [inline]
 vfs_rmdir+0x24c/0x4f0 fs/namei.c:4211
 incfs_kill_sb+0x18f/0x210 fs/incfs/vfs.c:1999
 deactivate_locked_super+0xb5/0x120 fs/super.c:336
 deactivate_super+0xaf/0xe0 fs/super.c:367
 cleanup_mnt+0x45e/0x4e0 fs/namespace.c:1192
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1199
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xaf2/0x2850 kernel/exit.c:887
 __do_sys_exit kernel/exit.c:996 [inline]
 __se_sys_exit kernel/exit.c:994 [inline]
 __x64_sys_exit+0x40/0x40 kernel/exit.c:994
 x64_sys_call+0x67/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:61
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc19bf9e0d9
Code: Unable to access opcode bytes at 0x7fc19bf9e0af.
RSP: 002b:00007fc19cef3fd8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 00007fc19c225fa0 RCX: 00007fc19bf9e0d9
RDX: 00007fc19cef49c8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fc19c035024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc19c226038 R14: 00007fc19c225fa0 R15: 00007ffdd01914b8
 </TASK>
Modules linked in:
CR2: 0000000000000170
---[ end trace 0000000000000000 ]---
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:440 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:199 [inline]
RIP: 0010:ihold+0x26/0x60 fs/inode.c:455
Code: 33 36 7c df 55 48 89 e5 41 56 53 48 89 fb e8 c1 1e ab ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 00 ac f0 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:ffffc900044afb80 EFLAGS: 00010246
RAX: ffff888117fb5100 RBX: 0000000000000000 RCX: ffff888117fb5100
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900044afb90 R08: ffffffff87b757e7 R09: 1ffffffff0f6eafc
R10: dffffc0000000000 R11: fffffbfff0f6eafd R12: ffff888117799374
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 000000010f34b000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	33 36                	xor    (%rsi),%esi
   2:	7c df                	jl     0xffffffe3
   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 c1 1e ab ff       	call   0xffab1ed4
  13:	48 8d bb 70 01 00 00 	lea    0x170(%rbx),%rdi
  1a:	be 04 00 00 00       	mov    $0x4,%esi
  1f:	e8 00 ac f0 ff       	call   0xfff0ac24
  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):
RDX: 00007fc19cef49c8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fc19c035024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc19c226038 R14: 00007fc19c225fa0 R15: 00007ffdd01914b8
 </TASK>
---[ end trace 0000000000000000 ]---
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
BUG: KASAN: null-ptr-deref in atomic_inc_return include/linux/atomic/atomic-instrumented.h:198 [inline]
BUG: KASAN: null-ptr-deref in ihold+0x20/0x60 fs/inode.c:455
Write of size 4 at addr 0000000000000170 by task syz.6.1228/5242

CPU: 1 PID: 5242 Comm: syz.6.1228 Tainted: G        W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_report+0x3d/0x60 mm/kasan/report.c:423
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
 atomic_inc_return include/linux/atomic/atomic-instrumented.h:198 [inline]
 ihold+0x20/0x60 fs/inode.c:455
 d_delete_notify include/linux/fsnotify.h:289 [inline]
 vfs_rmdir+0x24c/0x4f0 fs/namei.c:4211
 incfs_kill_sb+0x18f/0x210 fs/incfs/vfs.c:1999
 deactivate_locked_super+0xb5/0x120 fs/super.c:336
 deactivate_super+0xaf/0xe0 fs/super.c:367
 cleanup_mnt+0x45e/0x4e0 fs/namespace.c:1192
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1199
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xaf2/0x2850 kernel/exit.c:887
 __do_sys_exit kernel/exit.c:996 [inline]
 __se_sys_exit kernel/exit.c:994 [inline]
 __x64_sys_exit+0x40/0x40 kernel/exit.c:994
 x64_sys_call+0x67/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:61
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc19bf9e0d9
Code: Unable to access opcode bytes at 0x7fc19bf9e0af.
RSP: 002b:00007fc19cef3fd8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 00007fc19c225fa0 RCX: 00007fc19bf9e0d9
RDX: 00007fc19cef49c8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fc19c035024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc19c226038 R14: 00007fc19c225fa0 R15: 00007ffdd01914b8
 </TASK>
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000170
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 0 P4D 0 
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5242 Comm: syz.6.1228 Tainted: G    B   W          syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
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:440 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:199 [inline]
RIP: 0010:ihold+0x26/0x60 fs/inode.c:455
Code: 33 36 7c df 55 48 89 e5 41 56 53 48 89 fb e8 c1 1e ab ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 00 ac f0 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:ffffc900044afb80 EFLAGS: 00010246
RAX: ffff888117fb5100 RBX: 0000000000000000 RCX: ffff888117fb5100
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900044afb90 R08: ffffffff87b757e7 R09: 1ffffffff0f6eafc
R10: dffffc0000000000 R11: fffffbfff0f6eafd R12: ffff888117799374
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 000000010f34b000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 d_delete_notify include/linux/fsnotify.h:289 [inline]
 vfs_rmdir+0x24c/0x4f0 fs/namei.c:4211
 incfs_kill_sb+0x18f/0x210 fs/incfs/vfs.c:1999
 deactivate_locked_super+0xb5/0x120 fs/super.c:336
 deactivate_super+0xaf/0xe0 fs/super.c:367
 cleanup_mnt+0x45e/0x4e0 fs/namespace.c:1192
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1199
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xaf2/0x2850 kernel/exit.c:887
 __do_sys_exit kernel/exit.c:996 [inline]
 __se_sys_exit kernel/exit.c:994 [inline]
 __x64_sys_exit+0x40/0x40 kernel/exit.c:994
 x64_sys_call+0x67/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:61
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc19bf9e0d9
Code: Unable to access opcode bytes at 0x7fc19bf9e0af.
RSP: 002b:00007fc19cef3fd8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 00007fc19c225fa0 RCX: 00007fc19bf9e0d9
RDX: 00007fc19cef49c8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fc19c035024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc19c226038 R14: 00007fc19c225fa0 R15: 00007ffdd01914b8
 </TASK>
Modules linked in:
CR2: 0000000000000170
---[ end trace 0000000000000000 ]---
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:440 [inline]
RIP: 0010:atomic_inc_return include/linux/atomic/atomic-instrumented.h:199 [inline]
RIP: 0010:ihold+0x26/0x60 fs/inode.c:455
Code: 33 36 7c df 55 48 89 e5 41 56 53 48 89 fb e8 c1 1e ab ff 48 8d bb 70 01 00 00 be 04 00 00 00 e8 00 ac f0 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:ffffc900044afb80 EFLAGS: 00010246
RAX: ffff888117fb5100 RBX: 0000000000000000 RCX: ffff888117fb5100
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900044afb90 R08: ffffffff87b757e7 R09: 1ffffffff0f6eafc
R10: dffffc0000000000 R11: fffffbfff0f6eafd R12: ffff888117799374
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000170 CR3: 000000010f34b000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	33 36                	xor    (%rsi),%esi
   2:	7c df                	jl     0xffffffe3
   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 c1 1e ab ff       	call   0xffab1ed4
  13:	48 8d bb 70 01 00 00 	lea    0x170(%rbx),%rdi
  1a:	be 04 00 00 00       	mov    $0x4,%esi
  1f:	e8 00 ac f0 ff       	call   0xfff0ac24
  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