panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x68b3d6] goroutine 182 [running]: gvisor.googlesource.com/gvisor/pkg/sentry/mm.pmaIterator.ValuePtr(...) bazel-out/k8-fastbuild/bin/pkg/sentry/mm/pma_set.go:973 gvisor.googlesource.com/gvisor/pkg/sentry/mm.pmaIterator.getInternalMappingsLocked(0x0, 0x0, 0x0, 0x0) pkg/sentry/mm/pma.go:972 +0x26 gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).getPMAInternalMappingsLocked(0xc42016b900, 0xc42016bf68, 0x3, 0x20000200, 0x20001040, 0x20000000, 0x20002000, 0x1, 0xc42016bf68) pkg/sentry/mm/pma.go:748 +0x5d gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).withInternalMappings(0xc42016b900, 0xc5afe0, 0xc4205fc000, 0x20000200, 0x20001040, 0x100, 0xc4205ab4f0, 0xc400000001, 0xc4205ab500, 0xe40) pkg/sentry/mm/io.go:493 +0x334 gvisor.googlesource.com/gvisor/pkg/sentry/mm.(*MemoryManager).CopyOut(0xc42016b900, 0xc5afe0, 0xc4205fc000, 0x20000200, 0xc4206a7000, 0xe40, 0x1000, 0x100, 0x1000, 0xc4205ab618, ...) pkg/sentry/mm/io.go:119 +0x14b gvisor.googlesource.com/gvisor/pkg/sentry/usermem.CopyOutVec(0xc5afe0, 0xc4205fc000, 0xc59cc0, 0xc42016b900, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0xc4206a7000, 0xe40, ...) pkg/sentry/usermem/usermem.go:276 +0x1b0 gvisor.googlesource.com/gvisor/pkg/sentry/usermem.IOSequence.CopyOut(0xc59cc0, 0xc42016b900, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0x100, 0xc5afe0, 0xc4205fc000, 0xc4206a7000, ...) pkg/sentry/usermem/usermem.go:494 +0xc4 gvisor.googlesource.com/gvisor/pkg/sentry/kernel/pipe.(*Pipe).read(0xc4202bd400, 0xc5afe0, 0xc4205fc000, 0xc59cc0, 0xc42016b900, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0x100, ...) pkg/sentry/kernel/pipe/pipe.go:186 +0x249 gvisor.googlesource.com/gvisor/pkg/sentry/kernel/pipe.(*ReaderWriter).Read(0xc42000c0d0, 0xc5afe0, 0xc4205fc000, 0xc4205ce7e0, 0xc59cc0, 0xc42016b900, 0x0, 0x1, 0x20000200, 0x50c7e3e3, ...) pkg/sentry/kernel/pipe/reader_writer.go:55 +0x8a gvisor.googlesource.com/gvisor/pkg/sentry/fs.(*File).Readv(0xc4205ce7e0, 0xc5afe0, 0xc4205fc000, 0xc59cc0, 0xc42016b900, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0x100, ...) pkg/sentry/fs/file.go:232 +0x116 gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.readv(0xc4205fc000, 0xc4205ce7e0, 0xc59cc0, 0xc42016b900, 0x0, 0x1, 0x20000200, 0x50c7e3e3, 0x100, 0x50c7e3e3, ...) pkg/sentry/syscalls/linux/sys_read.go:191 +0x91 gvisor.googlesource.com/gvisor/pkg/sentry/syscalls/linux.Read(0xc4205fc000, 0x4, 0x20000200, 0x50c7e3e3, 0x0, 0x4002e0, 0x4002e0, 0x0, 0x0, 0x0, ...) pkg/sentry/syscalls/linux/sys_read.go:67 +0x21e gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc4205fc000, 0x0, 0x4, 0x20000200, 0x50c7e3e3, 0x0, 0x4002e0, 0x4002e0, 0x4321bb, 0xb9b360, ...) pkg/sentry/kernel/task_syscall.go:162 +0x307 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc4205fc000, 0x0, 0x4, 0x20000200, 0x50c7e3e3, 0x0, 0x4002e0, 0x4002e0, 0x4002e0, 0x4002e0) pkg/sentry/kernel/task_syscall.go:280 +0x62 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc4205fc000, 0x0, 0x4, 0x20000200, 0x50c7e3e3, 0x0, 0x4002e0, 0x4002e0, 0x86d270, 0xc420220f68) pkg/sentry/kernel/task_syscall.go:241 +0x91 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc4205fc000, 0x2, 0xc420454480) pkg/sentry/kernel/task_syscall.go:216 +0x142 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc4205fc000, 0xc4de60, 0x0) pkg/sentry/kernel/task_run.go:219 +0xe56 gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).run(0xc4205fc000, 0x8) pkg/sentry/kernel/task_run.go:95 +0x174 created by gvisor.googlesource.com/gvisor/pkg/sentry/kernel.(*Task).Start pkg/sentry/kernel/task_start.go:258 +0x100