Extracting prog: 1m4.655400284s
Minimizing prog: 13m37.301370338s
Simplifying prog options: 0s
Extracting C: 35.421089484s
Simplifying C: 5m6.597233303s


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: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}}): socket$unix-mount$9p_rdma-socket$inet6-write$P9_RSTATu-syz_open_procfs$userns-close-syz_clone-setns
detailed listing:
executing program 0:
socket$unix(0x1, 0x5, 0x0)
mount$9p_rdma(0x0, 0x0, 0x0, 0x8000e0, 0x0)
socket$inet6(0x10, 0x3, 0x0)
write$P9_RSTATu(0xffffffffffffffff, 0x0, 0x0)
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
close(r0)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(r0, 0x20000000)

program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {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: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}}): socket$unix-mount$9p_rdma-socket$inet6-write$P9_RSTATu-syz_open_procfs$userns-close-syz_clone-setns
detailed listing:
executing program 0:
socket$unix(0x1, 0x5, 0x0)
mount$9p_rdma(0x0, 0x0, 0x0, 0x8000e0, 0x0)
socket$inet6(0x10, 0x3, 0x0)
write$P9_RSTATu(0xffffffffffffffff, 0x0, 0x0)
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
close(r0)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(r0, 0x20000000)

program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
single: successfully extracted reproducer
found reproducer with 8 syscalls
minimizing guilty program
testing program (duration=1m40s, {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: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}}): socket$unix-mount$9p_rdma-socket$inet6-write$P9_RSTATu-syz_open_procfs$userns-close-syz_clone
detailed listing:
executing program 0:
socket$unix(0x1, 0x5, 0x0)
mount$9p_rdma(0x0, 0x0, 0x0, 0x8000e0, 0x0)
socket$inet6(0x10, 0x3, 0x0)
write$P9_RSTATu(0xffffffffffffffff, 0x0, 0x0)
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
close(r0)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)

program did not crash
testing program (duration=1m40s, {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: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}}): socket$unix-mount$9p_rdma-socket$inet6-write$P9_RSTATu-syz_open_procfs$userns-close-setns
detailed listing:
executing program 0:
socket$unix(0x1, 0x5, 0x0)
mount$9p_rdma(0x0, 0x0, 0x0, 0x8000e0, 0x0)
socket$inet6(0x10, 0x3, 0x0)
write$P9_RSTATu(0xffffffffffffffff, 0x0, 0x0)
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
close(r0)
setns(r0, 0x20000000)

program did not crash
testing program (duration=1m40s, {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: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}}): socket$unix-mount$9p_rdma-socket$inet6-write$P9_RSTATu-syz_open_procfs$userns-syz_clone-setns
detailed listing:
executing program 0:
socket$unix(0x1, 0x5, 0x0)
mount$9p_rdma(0x0, 0x0, 0x0, 0x8000e0, 0x0)
socket$inet6(0x10, 0x3, 0x0)
write$P9_RSTATu(0xffffffffffffffff, 0x0, 0x0)
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(r0, 0x20000000)

program did not crash
testing program (duration=1m40s, {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: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}}): socket$unix-mount$9p_rdma-socket$inet6-write$P9_RSTATu-close-syz_clone-setns
detailed listing:
executing program 0:
socket$unix(0x1, 0x5, 0x0)
mount$9p_rdma(0x0, 0x0, 0x0, 0x8000e0, 0x0)
socket$inet6(0x10, 0x3, 0x0)
write$P9_RSTATu(0xffffffffffffffff, 0x0, 0x0)
close(0xffffffffffffffff)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(0xffffffffffffffff, 0x20000000)

program did not crash
testing program (duration=1m40s, {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: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}}): socket$unix-mount$9p_rdma-socket$inet6-syz_open_procfs$userns-close-syz_clone-setns
detailed listing:
executing program 0:
socket$unix(0x1, 0x5, 0x0)
mount$9p_rdma(0x0, 0x0, 0x0, 0x8000e0, 0x0)
socket$inet6(0x10, 0x3, 0x0)
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
close(r0)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(r0, 0x20000000)

program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing program (duration=1m40s, {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: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}}): socket$unix-mount$9p_rdma-syz_open_procfs$userns-close-syz_clone-setns
detailed listing:
executing program 0:
socket$unix(0x1, 0x5, 0x0)
mount$9p_rdma(0x0, 0x0, 0x0, 0x8000e0, 0x0)
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
close(r0)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(r0, 0x20000000)

program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing program (duration=1m40s, {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: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}}): socket$unix-syz_open_procfs$userns-close-syz_clone-setns
detailed listing:
executing program 0:
socket$unix(0x1, 0x5, 0x0)
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
close(r0)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(r0, 0x20000000)

program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing program (duration=1m40s, {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: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$userns-close-syz_clone-setns
detailed listing:
executing program 0:
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
close(r0)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(r0, 0x20000000)

program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing program (duration=1m40s, {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: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$userns-close-syz_clone-setns
detailed listing:
executing program 0:
r0 = syz_open_procfs$userns(0x0, 0x0)
close(r0)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(r0, 0x20000000)

program did not crash
extracting C reproducer
testing compiled C program (duration=1m40s, {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: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$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
simplifying C reproducer
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=1m40s, {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: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$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=1m40s, {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:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program did not crash
testing compiled C program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=1m40s, {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:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
detailed listing:
executing program 0:
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
close(r0)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(r0, 0x20000000)

program did not crash
validation run: crashed=false
testing program (duration=1m40s, {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:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
detailed listing:
executing program 0:
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
close(r0)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(r0, 0x20000000)

program did not crash
validation run: crashed=false
testing program (duration=1m40s, {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:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
detailed listing:
executing program 0:
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
close(r0)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(r0, 0x20000000)

program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
validation run: crashed=true
testing program (duration=1m40s, {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:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
detailed listing:
executing program 0:
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
close(r0)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(r0, 0x20000000)

program did not crash
validation run: crashed=false
testing program (duration=1m40s, {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:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
detailed listing:
executing program 0:
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
close(r0)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(r0, 0x20000000)

program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
validation run: crashed=true
testing program (duration=1m40s, {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:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
detailed listing:
executing program 0:
r0 = syz_open_procfs$userns(0x0, &(0x7f0000000200))
close(r0)
syz_clone(0xa4a01040, 0x0, 0x0, 0x0, 0x0, 0x0)
setns(r0, 0x20000000)

program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
validation run: crashed=true
reproducing took 28m27.392929965s
repro crashed as (corrupted=false):
panic: Incrementing non-positive count 0xc000d13c68 on nsfs.Inode

goroutine 33082 gp=0xc0002ab880 m=18 mp=0xc000612808 [running]:
panic({0x12149a0?, 0xc000804380?})
	GOROOT/src/runtime/panic.go:802 +0x168 fp=0xc000dc98c0 sp=0xc000dc9810 pc=0x47fec8
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*inodeRefs).IncRef(0xc000d13c68)
	bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/nsfs/inode_refs.go:82 +0xe8 fp=0xc000dc9928 sp=0xc000dc98c0 pc=0x97b9c8
gvisor.dev/gvisor/pkg/sentry/kernel.(*PIDNamespace).IncRef(...)
	pkg/sentry/kernel/threads.go:258
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).GetPIDNamespace(...)
	pkg/sentry/kernel/threads.go:577
gvisor.dev/gvisor/pkg/sentry/kernel.(*namespaceSet).initFromTask(0xc000dc9988, 0xffffffff?, 0xc000b2e588, 0x20000000)
	pkg/sentry/kernel/task_clone.go:532 +0x85 fp=0xc000dc9950 sp=0xc000dc9928 pc=0xadf8c5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Setns(0xc00108d908, 0xc000622b80, 0x20000000)
	pkg/sentry/kernel/task_clone.go:612 +0x225 fp=0xc000dc9a00 sp=0xc000dc9950 pc=0xadff65
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Setns(0xc00108d908, 0x0?, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_thread.go:479 +0xa5 fp=0xc000dc9a78 sp=0xc000dc9a00 pc=0xcc4265
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00108d908, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:143 +0x655 fp=0xc000dc9ca8 sp=0xc000dc9a78 pc=0xafb7f5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00108d908, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:323 +0x45 fp=0xc000dc9d00 sp=0xc000dc9ca8 pc=0xafc945
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00108d908, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:283 +0x65 fp=0xc000dc9d50 sp=0xc000dc9d00 pc=0xafc665
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0009ec000?)
	pkg/sentry/kernel/task_syscall.go:258 +0x2a5 fp=0xc000dc9e28 sp=0xc000dc9d50 pc=0xafc3e5
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000f307e0?, 0xc00108d908)
	pkg/sentry/kernel/task_run.go:258 +0xfbc fp=0xc000dc9f30 sp=0xc000dc9e28 pc=0xaf1f3c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00108d908, 0x1b61)
	pkg/sentry/kernel/task_run.go:89 +0x202 fp=0xc000dc9fc0 sp=0xc000dc9f30 pc=0xaf09c2
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	pkg/sentry/kernel/task_start.go:416 +0x25 fp=0xc000dc9fe0 sp=0xc000dc9fc0 pc=0xafa265
runtime.goexit({})
	src/runtime/asm_amd64.s:1693 +0x1 fp=0xc000dc9fe8 sp=0xc000dc9fe0 pc=0x489161
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 28694
	pkg/sentry/kernel/task_start.go:416 +0xc5

final repro crashed as (corrupted=false):
panic: Incrementing non-positive count 0xc000d13c68 on nsfs.Inode

goroutine 33082 gp=0xc0002ab880 m=18 mp=0xc000612808 [running]:
panic({0x12149a0?, 0xc000804380?})
	GOROOT/src/runtime/panic.go:802 +0x168 fp=0xc000dc98c0 sp=0xc000dc9810 pc=0x47fec8
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*inodeRefs).IncRef(0xc000d13c68)
	bazel-out/k8-fastbuild/bin/pkg/sentry/fsimpl/nsfs/inode_refs.go:82 +0xe8 fp=0xc000dc9928 sp=0xc000dc98c0 pc=0x97b9c8
gvisor.dev/gvisor/pkg/sentry/kernel.(*PIDNamespace).IncRef(...)
	pkg/sentry/kernel/threads.go:258
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).GetPIDNamespace(...)
	pkg/sentry/kernel/threads.go:577
gvisor.dev/gvisor/pkg/sentry/kernel.(*namespaceSet).initFromTask(0xc000dc9988, 0xffffffff?, 0xc000b2e588, 0x20000000)
	pkg/sentry/kernel/task_clone.go:532 +0x85 fp=0xc000dc9950 sp=0xc000dc9928 pc=0xadf8c5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Setns(0xc00108d908, 0xc000622b80, 0x20000000)
	pkg/sentry/kernel/task_clone.go:612 +0x225 fp=0xc000dc9a00 sp=0xc000dc9950 pc=0xadff65
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Setns(0xc00108d908, 0x0?, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_thread.go:479 +0xa5 fp=0xc000dc9a78 sp=0xc000dc9a00 pc=0xcc4265
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00108d908, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:143 +0x655 fp=0xc000dc9ca8 sp=0xc000dc9a78 pc=0xafb7f5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00108d908, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:323 +0x45 fp=0xc000dc9d00 sp=0xc000dc9ca8 pc=0xafc945
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00108d908, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:283 +0x65 fp=0xc000dc9d50 sp=0xc000dc9d00 pc=0xafc665
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0009ec000?)
	pkg/sentry/kernel/task_syscall.go:258 +0x2a5 fp=0xc000dc9e28 sp=0xc000dc9d50 pc=0xafc3e5
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000f307e0?, 0xc00108d908)
	pkg/sentry/kernel/task_run.go:258 +0xfbc fp=0xc000dc9f30 sp=0xc000dc9e28 pc=0xaf1f3c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00108d908, 0x1b61)
	pkg/sentry/kernel/task_run.go:89 +0x202 fp=0xc000dc9fc0 sp=0xc000dc9f30 pc=0xaf09c2
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	pkg/sentry/kernel/task_start.go:416 +0x25 fp=0xc000dc9fe0 sp=0xc000dc9fc0 pc=0xafa265
runtime.goexit({})
	src/runtime/asm_amd64.s:1693 +0x1 fp=0xc000dc9fe8 sp=0xc000dc9fe0 pc=0x489161
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 28694
	pkg/sentry/kernel/task_start.go:416 +0xc5