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win32.c: unknown reparse tags

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* win32/win32.c (rb_w32_read_reparse_point): skip unknown reparse
  tags.  [ruby-core:83539] [Bug #14047]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60421 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-10-25 08:37:17 +00:00
parent 7ed3aae2fe
commit fffcf46f93
1 changed files with 4 additions and 1 deletions
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5
win32/win32.c
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@ -5017,7 +5017,7 @@ rb_w32_read_reparse_point(const WCHAR *path, rb_w32_reparse_buffer_t *rp,
ret = rp->SymbolicLinkReparseBuffer.PrintNameLength; ret = rp->SymbolicLinkReparseBuffer.PrintNameLength;
*len = ret / sizeof(WCHAR); *len = ret / sizeof(WCHAR);
} }
else { /* IO_REPARSE_TAG_MOUNT_POINT */ else if (rp->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT) {
static const WCHAR *volume = L"Volume{"; static const WCHAR *volume = L"Volume{";
enum {volume_prefix_len = rb_strlen_lit("\\??\\")}; enum {volume_prefix_len = rb_strlen_lit("\\??\\")};
name = ((char *)rp->MountPointReparseBuffer.PathBuffer + name = ((char *)rp->MountPointReparseBuffer.PathBuffer +
@ -5030,6 +5030,9 @@ rb_w32_read_reparse_point(const WCHAR *path, rb_w32_reparse_buffer_t *rp,
memcmp(name, volume, sizeof(volume) - 1 * sizeof(WCHAR)) == 0) memcmp(name, volume, sizeof(volume) - 1 * sizeof(WCHAR)) == 0)
return -1; return -1;
} }
else {
return -1;
}
*result = name; *result = name;
if (e) { if (e) {
if ((char *)name + ret + sizeof(WCHAR) > (char *)rp + bufsize) if ((char *)name + ret + sizeof(WCHAR) > (char *)rp + bufsize)