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| author | Zack Weinberg <zackw@panix.com> | 2018-03-07 14:32:03 -0500 |
|---|---|---|
| committer | Gabriel F. T. Gomes <gabriel@inconstante.eti.br> | 2018-12-05 18:15:43 -0200 |
| commit | 4e2f43f842ef5e253cc23383645adbaa03cedb86 (patch) | |
| tree | ca359423ba6ed4bb4d5ec247905a6ee13d456864 /include | |
| parent | 124fc732c15ef37b7ee9db25b1e9f9b20c799623 (diff) | |
| download | glibc-4e2f43f842ef5e253cc23383645adbaa03cedb86.tar.gz | |
Use PRINTF_FORTIFY instead of _IO_FLAGS2_FORTIFY (bug 11319)
The _chk variants of all of the printf functions become much simpler.
This is the last thing that we needed _IO_acquire_lock_clear_flags2
for, so it can go as well. I took the opportunity to make the headers
included and the names of all local variables consistent across all the
affected files.
Since we ultimately want to get rid of __no_long_double as well, it
must be possible to get all of the nontrivial effects of the _chk
functions by calling the _internal functions with appropriate flags.
For most of the __(v)xprintf_chk functions, this is covered by
PRINTF_FORTIFY plus some up-front argument checks that can be
duplicated. However, __(v)sprintf_chk installs a custom jump table so
that it can crash instead of overflowing the output buffer. This
functionality is moved to __vsprintf_internal, which now has a
'maxlen' argument like __vsnprintf_internal; to get the unsafe
behavior of ordinary (v)sprintf, pass -1 for that argument.
obstack_printf_chk and obstack_vprintf_chk are no longer in the same
file.
As a side-effect of the unification of both fortified and non-fortified
vdprintf initialization, this patch fixes bug 11319 for __dprintf_chk
and __vdprintf_chk, which was previously fixed only for dprintf and
vdprintf by the commit
commit 7ca890b88e6ab7624afb1742a9fffb37ad5b3fc3
Author: Ulrich Drepper <drepper@redhat.com>
Date: Wed Feb 24 16:07:57 2010 -0800
Fix reporting of I/O errors in *dprintf functions.
This patch adds a test case to avoid regressions.
Tested for powerpc and powerpc64le.
Diffstat (limited to 'include')
| -rw-r--r-- | include/stdio.h | 5 | ||||
| -rw-r--r-- | include/wchar.h | 2 |
2 files changed, 0 insertions, 7 deletions
diff --git a/include/stdio.h b/include/stdio.h index 0856d729d9..1b7da0f74d 100644 --- a/include/stdio.h +++ b/include/stdio.h @@ -216,11 +216,6 @@ libc_hidden_proto (__open_memstream) libc_hidden_proto (__libc_fatal) rtld_hidden_proto (__libc_fatal) libc_hidden_proto (__vsprintf_chk) -libc_hidden_proto (__vsnprintf_chk) -libc_hidden_proto (__vfprintf_chk) -libc_hidden_proto (__vasprintf_chk) -libc_hidden_proto (__vdprintf_chk) -libc_hidden_proto (__obstack_vprintf_chk) extern FILE * __fmemopen (void *buf, size_t len, const char *mode); libc_hidden_proto (__fmemopen) diff --git a/include/wchar.h b/include/wchar.h index d0fe45c3a6..86506d28e9 100644 --- a/include/wchar.h +++ b/include/wchar.h @@ -216,8 +216,6 @@ extern int __vswprintf_chk (wchar_t *__restrict __s, size_t __n, const wchar_t *__restrict __format, __gnuc_va_list __arg) /* __attribute__ ((__format__ (__wprintf__, 5, 0))) */; -libc_hidden_proto (__vfwprintf_chk) -libc_hidden_proto (__vswprintf_chk) extern int __isoc99_fwscanf (__FILE *__restrict __stream, const wchar_t *__restrict __format, ...); |