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| author | Florian Weimer <fweimer@redhat.com> | 2019-05-20 21:54:57 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2019-05-20 21:54:57 +0200 |
| commit | 09e1b0e3f6facc1af2dbcfef204f0aaa8718772b (patch) | |
| tree | 18056a8f7177511eff47519d176c310901f5e455 /libio/iofsetpos64.c | |
| parent | 75c51570c710aa9c6df6b7a1e131392e1408c63f (diff) | |
| download | glibc-09e1b0e3f6facc1af2dbcfef204f0aaa8718772b.tar glibc-09e1b0e3f6facc1af2dbcfef204f0aaa8718772b.tar.gz glibc-09e1b0e3f6facc1af2dbcfef204f0aaa8718772b.tar.bz2 glibc-09e1b0e3f6facc1af2dbcfef204f0aaa8718772b.zip | |
libio: Remove codecvt vtable [BZ #24588]
The codecvt vtable is not a real vtable because it also contains the
conversion state data. Furthermore, wide stream support was added to
GCC 3.0, after a C++ ABI bump, so there is no compatibility
requirement with libstdc++.
This change removes several unmangled function pointers which could
be used with a corrupted FILE object to redirect execution. (libio
vtable verification did not cover the codecvt vtable.)
Reviewed-by: Yann Droneaud <ydroneaud@opteya.com>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'libio/iofsetpos64.c')
| -rw-r--r-- | libio/iofsetpos64.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/libio/iofsetpos64.c b/libio/iofsetpos64.c index d1865b728e..f382ba0dc1 100644 --- a/libio/iofsetpos64.c +++ b/libio/iofsetpos64.c @@ -48,8 +48,7 @@ _IO_new_fsetpos64 (FILE *fp, const fpos64_t *posp) else { result = 0; - if (fp->_mode > 0 - && (*fp->_codecvt->__codecvt_do_encoding) (fp->_codecvt) < 0) + if (fp->_mode > 0 && __libio_codecvt_encoding (fp->_codecvt) < 0) /* This is a stateful encoding, safe the state. */ fp->_wide_data->_IO_state = posp->__state; } |