diff options
Diffstat (limited to 'pkg/sentry/fs')
| -rw-r--r-- | pkg/sentry/fs/proc/uid_gid_map.go | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/pkg/sentry/fs/proc/uid_gid_map.go b/pkg/sentry/fs/proc/uid_gid_map.go index d6e278f79..a52e0cb1f 100644 --- a/pkg/sentry/fs/proc/uid_gid_map.go +++ b/pkg/sentry/fs/proc/uid_gid_map.go @@ -134,10 +134,23 @@ func (imfo *idMapFileOperations) Write(ctx context.Context, file *fs.File, src u if _, err := src.CopyIn(ctx, b); err != nil { return 0, err } - lines := bytes.SplitN(bytes.TrimSpace(b), []byte("\n"), maxIDMapLines+1) + + // Truncate from the first NULL byte. + var nul int64 + nul = int64(bytes.IndexByte(b, 0)) + if nul == -1 { + nul = srclen + } + b = b[:nul] + // Remove the last \n. + if nul >= 1 && b[nul-1] == '\n' { + b = b[:nul-1] + } + lines := bytes.SplitN(b, []byte("\n"), maxIDMapLines+1) if len(lines) > maxIDMapLines { return 0, syserror.EINVAL } + entries := make([]auth.IDMapEntry, len(lines)) for i, l := range lines { var e auth.IDMapEntry |