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| author | Florian Weimer <fweimer@redhat.com> | 2022-12-19 18:56:55 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2022-12-19 18:56:55 +0100 |
| commit | 118816de3383ff12769349784689141355cc787c (patch) | |
| tree | fa858eff7a21613e38e532ac9c1d0edd1651aeab /stdio-common | |
| parent | 5365acc567a49270b4341b9d325794ec554258d9 (diff) | |
| download | glibc-118816de3383ff12769349784689141355cc787c.zip glibc-118816de3383ff12769349784689141355cc787c.tar.gz glibc-118816de3383ff12769349784689141355cc787c.tar.bz2 | |
libio: Convert __vswprintf_internal to buffers (bug 27857)
Always null-terminate the buffer and set E2BIG if the buffer is too
small. This fixes bug 27857.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'stdio-common')
| -rw-r--r-- | stdio-common/wprintf_buffer_flush.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/stdio-common/wprintf_buffer_flush.c b/stdio-common/wprintf_buffer_flush.c index 2d91095..46af0f3 100644 --- a/stdio-common/wprintf_buffer_flush.c +++ b/stdio-common/wprintf_buffer_flush.c @@ -16,6 +16,7 @@ License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ +#include <errno.h> #include <printf_buffer.h> #include "printf_buffer-wchar_t.h" @@ -31,6 +32,11 @@ __wprintf_buffer_do_flush (struct __wprintf_buffer *buf) case __wprintf_buffer_mode_to_file: __wprintf_buffer_flush_to_file ((struct __wprintf_buffer_to_file *) buf); return; + case __wprintf_buffer_mode_swprintf: + buf->write_end[-1] = L'\0'; + __set_errno (E2BIG); + __wprintf_buffer_mark_failed (buf); + return; } __builtin_trap (); } |