podman --remote exec skips a byte for every 8192 bytes on its stdout pipe

[mnk]

Is this a BUG REPORT or FEATURE REQUEST? (leave only one on its own line)

/kind bug

Description

When using podman --remote exec the stdout pipe will skip a byte for every 8192 bytes

Steps to reproduce the issue:

1. systemctl --user enable --now podman.socket

2. podman run --name podman_remote_test --detach fedora sleep infinity

3. podman --remote --url unix:/run/user/${UID}/podman/podman.sock exec podman_remote_test seq 1862

Describe the results you received:
...
1859
186
1861
1862

Describe the results you expected:
...
1859
1860
1861
1862

Additional information you deem important (e.g. issue happens only occasionally):

Output of podman version:

Version:      3.3.1
API Version:  3.3.1
Go Version:   go1.16.6
Built:        Wed Sep  8 22:50:47 2021
OS/Arch:      linux/amd64

Output of podman info --debug:

host:
  arch: amd64
  buildahVersion: 1.22.3
  cgroupControllers: []
  cgroupManager: systemd
  cgroupVersion: v2
  conmon:
    package: conmon-2.0.29-2.fc34.x86_64
    path: /usr/bin/conmon
    version: 'conmon version 2.0.29, commit: '
  cpus: 32
  distribution:
    distribution: fedora
    version: "34"
  eventLogger: journald
  hostname: gamma.dekj.local
  idMappings:
    gidmap:
    - container_id: 0
      host_id: 1026
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
    uidmap:
    - container_id: 0
      host_id: 1026
      size: 1
    - container_id: 1
      host_id: 100000
      size: 65536
  kernel: 5.13.13-200.fc34.x86_64
  linkmode: dynamic
  memFree: 119243395072
  memTotal: 134972719104
  ociRuntime:
    name: crun
    package: crun-1.0-1.fc34.x86_64
    path: /usr/bin/crun
    version: |-
      crun version 1.0
      commit: 139dc6971e2f1d931af520188763e984d6cdfbf8
      spec: 1.0.0
      +SYSTEMD +SELINUX +APPARMOR +CAP +SECCOMP +EBPF +CRIU +YAJL
  os: linux
  remoteSocket:
    exists: true
    path: /run/user/1026/podman/podman.sock
  security:
    apparmorEnabled: false
    capabilities: CAP_CHOWN,CAP_DAC_OVERRIDE,CAP_FOWNER,CAP_FSETID,CAP_KILL,CAP_NET_BIND_SERVICE,CAP_SETFCAP,CAP_SETGID,CAP_SETPCAP,CAP_SETUID,CAP_SYS_CHROOT
    rootless: true
    seccompEnabled: true
    seccompProfilePath: /usr/share/containers/seccomp.json
    selinuxEnabled: true
  serviceIsRemote: false
  slirp4netns:
    executable: /usr/bin/slirp4netns
    package: slirp4netns-1.1.12-2.fc34.x86_64
    version: |-
      slirp4netns version 1.1.12
      commit: 7a104a101aa3278a2152351a082a6df71f57c9a3
      libslirp: 4.4.0
      SLIRP_CONFIG_VERSION_MAX: 3
      libseccomp: 2.5.0
  swapFree: 8589930496
  swapTotal: 8589930496
  uptime: 3h 7m 55.34s (Approximately 0.12 days)
registries:
  search:
  - registry.fedoraproject.org
  - registry.access.redhat.com
  - docker.io
  - quay.io
store:
  configFile: /home/mnk/.config/containers/storage.conf
  containerStore:
    number: 1
    paused: 0
    running: 1
    stopped: 0
  graphDriverName: overlay
  graphOptions: {}
  graphRoot: /home/mnk/.local/share/containers/storage
  graphStatus:
    Backing Filesystem: btrfs
    Native Overlay Diff: "true"
    Supports d_type: "true"
    Using metacopy: "false"
  imageStore:
    number: 1
  runRoot: /run/user/1026/containers
  volumePath: /home/mnk/.local/share/containers/storage/volumes
version:
  APIVersion: 3.3.1
  Built: 1631134247
  BuiltTime: Wed Sep  8 22:50:47 2021
  GitCommit: ""
  GoVersion: go1.16.6
  OsArch: linux/amd64
  Version: 3.3.1

Package info (e.g. output of rpm -q podman or apt list podman):

podman-3.3.1-1.fc34.x86_64

Have you tested with the latest version of Podman and have you checked the Podman Troubleshooting Guide? (https://github.com/containers/podman/blob/master/troubleshooting.md)

Yes

Additional environment details (AWS, VirtualBox, physical, etc.):

None

[Luap99]

I can reproduce, but only with the fedora image and not alpine, that's weird.