Extracting prog: 1m22.968815807s
Minimizing prog: 12m38.691338421s
Simplifying prog options: 0s
Extracting C: 40.908325041s
Simplifying C: 5m30.367725369s


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=1m36.759155133s, {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=1m36.759155133s, {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=1m36.759155133s, {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=1m36.759155133s, {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=1m36.759155133s, {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=1m36.759155133s, {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=1m36.759155133s, {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=1m36.759155133s, {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=1m36.759155133s, {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=1m36.759155133s, {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$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
simplifying C reproducer
testing compiled C program (duration=1m36.759155133s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=1m36.759155133s, {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$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=1m36.759155133s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=1m36.759155133s, {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$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing compiled C program (duration=1m36.759155133s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:10 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_open_procfs$userns-close-syz_clone-setns
program crashed: panic: Incrementing non-positive count ADDR on nsfs.Inode
testing program (duration=1m36.759155133s, {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=1m36.759155133s, {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=1m36.759155133s, {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 23m53.902751007s
repro crashed as (corrupted=false):
panic: Incrementing non-positive count 0xc000daf568 on nsfs.Inode

goroutine 1515 gp=0xc000f5e380 m=23 mp=0xc000d59808 [running]:
panic({0x1acc900?, 0xc000f36f50?})
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/go/src/runtime/panic.go:802 +0x150 fp=0xc00134f2a0 sp=0xc00134f1f0 pc=0xc3a00
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*inodeRefs).IncRef(0xc000daf568)
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs/inode_refs.go:82 +0x1f4 fp=0xc00134f330 sp=0xc00134f2a0 pc=0xa3fcc4
gvisor.dev/gvisor/pkg/sentry/kernel.(*PIDNamespace).IncRef(...)
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/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/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/threads.go:577
gvisor.dev/gvisor/pkg/sentry/kernel.(*namespaceSet).initFromTask(0xc00134f478, 0xc000c06c88, 0xc000e90c88, 0x20000000)
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_clone.go:532 +0x218 fp=0xc00134f3c0 sp=0xc00134f330 pc=0xd2fa08
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Setns(0xc000c06c88, 0xc0000a3c80, 0x20000000)
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_clone.go:612 +0x4a0 fp=0xc00134f5c0 sp=0xc00134f3c0 pc=0xd30a30
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Setns(0xc000c06c88, 0xcfe78?, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/syscalls/linux/sys_thread.go:479 +0x224 fp=0xc00134f680 sp=0xc00134f5c0 pc=0x10e3604
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000c06c88, 0x10c, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:143 +0xcb4 fp=0xc00134f940 sp=0xc00134f680 pc=0xd6d4f4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000c06c88, 0x10c, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:323 +0xa0 fp=0xc00134f9f0 sp=0xc00134f940 pc=0xd6fc00
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000c06c88, 0x10c, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:283 +0xe8 fp=0xc00134fa60 sp=0xc00134f9f0 pc=0xd6f238
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000c06c88)
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:258 +0x7d8 fp=0xc00134fb90 sp=0xc00134fa60 pc=0xd6ec38
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000c06c88?, 0xc000c06c88)
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_run.go:258 +0x2644 fp=0xc00134fe50 sp=0xc00134fb90 pc=0xd56be4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000c06c88, 0xfe)
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_run.go:89 +0x574 fp=0xc00134ffa0 sp=0xc00134fe50 pc=0xd53dc4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_start.go:416 +0x40 fp=0xc00134ffd0 sp=0xc00134ffa0 pc=0xd6aa30
runtime.goexit({})
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/go/src/runtime/asm_arm64.s:1268 +0x4 fp=0xc00134ffd0 sp=0xc00134ffd0 pc=0xccee4
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 417
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_start.go:416 +0x19c

final repro crashed as (corrupted=false):
panic: Incrementing non-positive count 0xc000daf568 on nsfs.Inode

goroutine 1515 gp=0xc000f5e380 m=23 mp=0xc000d59808 [running]:
panic({0x1acc900?, 0xc000f36f50?})
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/go/src/runtime/panic.go:802 +0x150 fp=0xc00134f2a0 sp=0xc00134f1f0 pc=0xc3a00
gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs.(*inodeRefs).IncRef(0xc000daf568)
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/fsimpl/nsfs/inode_refs.go:82 +0x1f4 fp=0xc00134f330 sp=0xc00134f2a0 pc=0xa3fcc4
gvisor.dev/gvisor/pkg/sentry/kernel.(*PIDNamespace).IncRef(...)
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/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/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/threads.go:577
gvisor.dev/gvisor/pkg/sentry/kernel.(*namespaceSet).initFromTask(0xc00134f478, 0xc000c06c88, 0xc000e90c88, 0x20000000)
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_clone.go:532 +0x218 fp=0xc00134f3c0 sp=0xc00134f330 pc=0xd2fa08
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Setns(0xc000c06c88, 0xc0000a3c80, 0x20000000)
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_clone.go:612 +0x4a0 fp=0xc00134f5c0 sp=0xc00134f3c0 pc=0xd30a30
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Setns(0xc000c06c88, 0xcfe78?, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/syscalls/linux/sys_thread.go:479 +0x224 fp=0xc00134f680 sp=0xc00134f5c0 pc=0x10e3604
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000c06c88, 0x10c, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:143 +0xcb4 fp=0xc00134f940 sp=0xc00134f680 pc=0xd6d4f4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000c06c88, 0x10c, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:323 +0xa0 fp=0xc00134f9f0 sp=0xc00134f940 pc=0xd6fc00
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000c06c88, 0x10c, {{0x3}, {0x20000000}, {0x0}, {0x0}, {0x0}, {0x0}})
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:283 +0xe8 fp=0xc00134fa60 sp=0xc00134f9f0 pc=0xd6f238
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000c06c88)
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_syscall.go:258 +0x7d8 fp=0xc00134fb90 sp=0xc00134fa60 pc=0xd6ec38
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000c06c88?, 0xc000c06c88)
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_run.go:258 +0x2644 fp=0xc00134fe50 sp=0xc00134fb90 pc=0xd56be4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000c06c88, 0xfe)
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_run.go:89 +0x574 fp=0xc00134ffa0 sp=0xc00134fe50 pc=0xd53dc4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_start.go:416 +0x40 fp=0xc00134ffd0 sp=0xc00134ffa0 pc=0xd6aa30
runtime.goexit({})
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/go/src/runtime/asm_arm64.s:1268 +0x4 fp=0xc00134ffd0 sp=0xc00134ffd0 pc=0xccee4
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 417
	/syzkaller/.cache/bazel/_bazel_root/667291253eecc7994147822c94d52fd6/sandbox/linux-sandbox/28/execroot/_main/gopath/src/gvisor.dev/gvisor/pkg/sentry/kernel/task_start.go:416 +0x19c