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| author | Florian Weimer <fweimer@redhat.com> | 2019-11-22 22:10:42 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2019-11-27 20:16:22 +0100 |
| commit | cb61630ed712d033f54295f776967532d3f4b46a (patch) | |
| tree | 0339f32c55367e2b539f6e4f6c578110e4146da6 | |
| parent | 381b76d7a3511e152675018457bd432fa2657928 (diff) | |
| download | glibc-cb61630ed712d033f54295f776967532d3f4b46a.tar.gz glibc-cb61630ed712d033f54295f776967532d3f4b46a.tar.xz glibc-cb61630ed712d033f54295f776967532d3f4b46a.zip | |
libio: Disable vtable validation for pre-2.1 interposed handles [BZ #25203]
Commit c402355dfa7807b8e0adb27c009135a7e2b9f1b0 ("libio: Disable
vtable validation in case of interposition [BZ #23313]") only covered
the interposable glibc 2.1 handles, in libio/stdfiles.c. The
parallel code in libio/oldstdfiles.c needs similar detection logic.
Fixes (again) commit db3476aff19b75c4fdefbe65fcd5f0a90588ba51
("libio: Implement vtable verification [BZ #20191]").
Change-Id: Ief6f9f17e91d1f7263421c56a7dc018f4f595c21
| -rw-r--r-- | libio/oldstdfiles.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libio/oldstdfiles.c b/libio/oldstdfiles.c index bb1705b7b2..95c041a632 100644 --- a/libio/oldstdfiles.c +++ b/libio/oldstdfiles.c @@ -83,6 +83,11 @@ _IO_check_libio (void) = stderr->_vtable_offset = ((int) sizeof (struct _IO_FILE) - (int) sizeof (struct _IO_FILE_complete)); + + if (_IO_stdin_.vtable != &_IO_old_file_jumps + || _IO_stdout_.vtable != &_IO_old_file_jumps + || _IO_stderr_.vtable != &_IO_old_file_jumps) + IO_set_accept_foreign_vtables (&_IO_vtable_check); } } |