Extracting prog: 57.064684126s
Minimizing prog: 7m52.391311411s
Simplifying prog options: 0s
Extracting C: 33.338502304s
Simplifying C: 3m9.492566743s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 45s
testing program (duration=45s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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=1m1.174275936s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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=1m1.174275936s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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=1m1.174275936s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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=1m1.174275936s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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=1m1.174275936s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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=1m1.174275936s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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=1m1.174275936s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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=1m1.174275936s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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=1m1.174275936s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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=1m1.174275936s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
simplifying C reproducer
testing compiled C program (duration=1m1.174275936s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=1m1.174275936s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=1m1.174275936s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=1m1.174275936s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=1m1.174275936s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing program (duration=1m1.174275936s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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=1m1.174275936s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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=1m1.174275936s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 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 14m39.993010439s
repro crashed as (corrupted=false):
panic: Incrementing non-positive count 0xc000f8bc68 on nsfs.Inode

goroutine 583 gp=0xc0010c3880 m=18 mp=0xc000f98808 [running]:
panic({0x240f680?, 0xc001606870?})
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/go/src/runtime/panic.go:802 +0x168 fp=0xc000c492c0 sp=0xc000c49210 pc=0x4bc328
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*inodeRefs).IncRef(0xc000f8bc68)
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs/inode_refs.go:82 +0x23d fp=0xc000c49350 sp=0xc000c492c0 pc=0x103d75d
gvisor.dev/gvisor/pkg/sentry/kernel.(*PIDNamespace).IncRef(...)
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/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/a13edd57d9dad04937e1fb5843ea1532/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(0xc000c49480, 0xc000c93908, 0xc001040588, 0x20000000)
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_clone.go:532 +0x24b fp=0xc000c493d8 sp=0xc000c49350 pc=0x13c086b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Setns(0xc000c93908, 0xc000c30c80, 0x20000000)
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_clone.go:612 +0x60c fp=0xc000c495d0 sp=0xc000c493d8 pc=0x13c1aec
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Setns(0xc000c93908, 0x0?, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/syscalls/linux/sys_thread.go:479 +0x29f fp=0xc000c49690 sp=0xc000c495d0 pc=0x1830f5f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000c93908, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:143 +0xff1 fp=0xc000c49940 sp=0xc000c49690 pc=0x140b731
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000c93908, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:323 +0xc5 fp=0xc000c499e8 sp=0xc000c49940 pc=0x140e665
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000c93908, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:283 +0x107 fp=0xc000c49a58 sp=0xc000c499e8 pc=0x140db27
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000c93908)
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:258 +0x907 fp=0xc000c49b80 sp=0xc000c49a58 pc=0x140d407
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000c93908?, 0xc000c93908)
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_run.go:258 +0x30ec fp=0xc000c49e68 sp=0xc000c49b80 pc=0x13effac
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000c93908, 0x52)
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_run.go:89 +0x6e7 fp=0xc000c49fb0 sp=0xc000c49e68 pc=0x13ec587
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_start.go:416 +0x45 fp=0xc000c49fe0 sp=0xc000c49fb0 pc=0x1408545
runtime.goexit({})
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/go/src/runtime/asm_amd64.s:1693 +0x1 fp=0xc000c49fe8 sp=0xc000c49fe0 pc=0x4c5b81
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 564
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_start.go:416 +0x1be

final repro crashed as (corrupted=false):
panic: Incrementing non-positive count 0xc000f8bc68 on nsfs.Inode

goroutine 583 gp=0xc0010c3880 m=18 mp=0xc000f98808 [running]:
panic({0x240f680?, 0xc001606870?})
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/go/src/runtime/panic.go:802 +0x168 fp=0xc000c492c0 sp=0xc000c49210 pc=0x4bc328
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*inodeRefs).IncRef(0xc000f8bc68)
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs/inode_refs.go:82 +0x23d fp=0xc000c49350 sp=0xc000c492c0 pc=0x103d75d
gvisor.dev/gvisor/pkg/sentry/kernel.(*PIDNamespace).IncRef(...)
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/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/a13edd57d9dad04937e1fb5843ea1532/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(0xc000c49480, 0xc000c93908, 0xc001040588, 0x20000000)
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_clone.go:532 +0x24b fp=0xc000c493d8 sp=0xc000c49350 pc=0x13c086b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Setns(0xc000c93908, 0xc000c30c80, 0x20000000)
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_clone.go:612 +0x60c fp=0xc000c495d0 sp=0xc000c493d8 pc=0x13c1aec
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Setns(0xc000c93908, 0x0?, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/syscalls/linux/sys_thread.go:479 +0x29f fp=0xc000c49690 sp=0xc000c495d0 pc=0x1830f5f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000c93908, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:143 +0xff1 fp=0xc000c49940 sp=0xc000c49690 pc=0x140b731
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000c93908, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:323 +0xc5 fp=0xc000c499e8 sp=0xc000c49940 pc=0x140e665
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000c93908, 0x134, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:283 +0x107 fp=0xc000c49a58 sp=0xc000c499e8 pc=0x140db27
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000c93908)
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:258 +0x907 fp=0xc000c49b80 sp=0xc000c49a58 pc=0x140d407
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000c93908?, 0xc000c93908)
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_run.go:258 +0x30ec fp=0xc000c49e68 sp=0xc000c49b80 pc=0x13effac
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000c93908, 0x52)
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_run.go:89 +0x6e7 fp=0xc000c49fb0 sp=0xc000c49e68 pc=0x13ec587
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_start.go:416 +0x45 fp=0xc000c49fe0 sp=0xc000c49fb0 pc=0x1408545
runtime.goexit({})
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/go/src/runtime/asm_amd64.s:1693 +0x1 fp=0xc000c49fe8 sp=0xc000c49fe0 pc=0x4c5b81
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 564
	/syzkaller/.cache/bazel/_bazel_root/a13edd57d9dad04937e1fb5843ea1532/sandbox/linux-sandbox/9/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_start.go:416 +0x1be