Extracting prog: 24.237622774s
Minimizing prog: 4m2.166310176s
Simplifying prog options: 0s
Extracting C: 11.463951186s
Simplifying C: 1m10.136051s


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: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}}): 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=30s, {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: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=30s, {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: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=30s, {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: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=30s, {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: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=30s, {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: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=30s, {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: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=30s, {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: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=30s, {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: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=30s, {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: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=30s, {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: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$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
simplifying C reproducer
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=30s, {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: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$userns-close-syz_clone-setns
program did not crash
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=30s, {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$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=30s, {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:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing program (duration=30s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$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=30s, {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:false 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=30s, {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:false 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 6m58.307355019s
repro crashed as (corrupted=false):
panic: Incrementing non-positive count 0xc00107aae8 on nsfs.Inode

goroutine 5046 gp=0xc000ad9180 m=12 mp=0xc0006c0008 [running]:
panic({0x18ccb40?, 0xc000fba8d0?})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/go/src/runtime/panic.go:802 +0x168 fp=0xc000df38c0 sp=0xc000df3810 pc=0x480428
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*inodeRefs).IncRef(0xc00107aae8)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs/inode_refs.go:82 +0x1c8 fp=0xc000df3928 sp=0xc000df38c0 pc=0xb95a88
gvisor.dev/gvisor/pkg/sentry/kernel.(*PIDNamespace).IncRef(...)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/threads.go:258
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).GetPIDNamespace(...)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/threads.go:577
gvisor.dev/gvisor/pkg/sentry/kernel.(*namespaceSet).initFromTask(0xc000df3988, 0xc0ffffffff?, 0xc001212008, 0x20000000)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_clone.go:532 +0x179 fp=0xc000df3950 sp=0xc000df3928 pc=0xdfc259
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Setns(0xc001200008, 0xc000cb3600, 0x20000000)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_clone.go:612 +0x3e6 fp=0xc000df3a00 sp=0xc000df3950 pc=0xdfcde6
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Setns(0xc001200008, 0xc000df3b20?, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/syscalls/linux/sys_thread.go:479 +0x1a5 fp=0xc000df3a78 sp=0xc000df3a00 pc=0x1109425
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc001200008, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:143 +0xd10 fp=0xc000df3ca8 sp=0xc000df3a78 pc=0xe304f0
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc001200008, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:323 +0x7f fp=0xc000df3d00 sp=0xc000df3ca8 pc=0xe327df
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc001200008, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:283 +0xc5 fp=0xc000df3d50 sp=0xc000df3d00 pc=0xe31e65
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000240fd0?)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:258 +0x5b2 fp=0xc000df3e28 sp=0xc000df3d50 pc=0xe318b2
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc00130ed80?, 0xc001200008)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_run.go:258 +0x204b fp=0xc000df3f30 sp=0xc000df3e28 pc=0xe1deeb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc001200008, 0x532)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_run.go:89 +0x3de fp=0xc000df3fc0 sp=0xc000df3f30 pc=0xe1b71e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_start.go:416 +0x25 fp=0xc000df3fe0 sp=0xc000df3fc0 pc=0xe2de05
runtime.goexit({})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/go/src/runtime/asm_amd64.s:1693 +0x1 fp=0xc000df3fe8 sp=0xc000df3fe0 pc=0x4896c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 4875
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_start.go:416 +0x110

final repro crashed as (corrupted=false):
panic: Incrementing non-positive count 0xc00107aae8 on nsfs.Inode

goroutine 5046 gp=0xc000ad9180 m=12 mp=0xc0006c0008 [running]:
panic({0x18ccb40?, 0xc000fba8d0?})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/go/src/runtime/panic.go:802 +0x168 fp=0xc000df38c0 sp=0xc000df3810 pc=0x480428
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*inodeRefs).IncRef(0xc00107aae8)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs/inode_refs.go:82 +0x1c8 fp=0xc000df3928 sp=0xc000df38c0 pc=0xb95a88
gvisor.dev/gvisor/pkg/sentry/kernel.(*PIDNamespace).IncRef(...)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/threads.go:258
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).GetPIDNamespace(...)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/threads.go:577
gvisor.dev/gvisor/pkg/sentry/kernel.(*namespaceSet).initFromTask(0xc000df3988, 0xc0ffffffff?, 0xc001212008, 0x20000000)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_clone.go:532 +0x179 fp=0xc000df3950 sp=0xc000df3928 pc=0xdfc259
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Setns(0xc001200008, 0xc000cb3600, 0x20000000)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_clone.go:612 +0x3e6 fp=0xc000df3a00 sp=0xc000df3950 pc=0xdfcde6
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Setns(0xc001200008, 0xc000df3b20?, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/syscalls/linux/sys_thread.go:479 +0x1a5 fp=0xc000df3a78 sp=0xc000df3a00 pc=0x1109425
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc001200008, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:143 +0xd10 fp=0xc000df3ca8 sp=0xc000df3a78 pc=0xe304f0
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc001200008, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:323 +0x7f fp=0xc000df3d00 sp=0xc000df3ca8 pc=0xe327df
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc001200008, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:283 +0xc5 fp=0xc000df3d50 sp=0xc000df3d00 pc=0xe31e65
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000240fd0?)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:258 +0x5b2 fp=0xc000df3e28 sp=0xc000df3d50 pc=0xe318b2
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc00130ed80?, 0xc001200008)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_run.go:258 +0x204b fp=0xc000df3f30 sp=0xc000df3e28 pc=0xe1deeb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc001200008, 0x532)
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_run.go:89 +0x3de fp=0xc000df3fc0 sp=0xc000df3f30 pc=0xe1b71e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_start.go:416 +0x25 fp=0xc000df3fe0 sp=0xc000df3fc0 pc=0xe2de05
runtime.goexit({})
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/go/src/runtime/asm_amd64.s:1693 +0x1 fp=0xc000df3fe8 sp=0xc000df3fe0 pc=0x4896c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 4875
	/syzkaller/.cache/bazel/_bazel_root/8c3527d6b90f1bcab77f0f2b1b1fec96/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_start.go:416 +0x110