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| author | Corinna Vinschen <corinna@vinschen.de> | 2009-11-23 17:02:20 +0000 |
|---|---|---|
| committer | Corinna Vinschen <corinna@vinschen.de> | 2009-11-23 17:02:20 +0000 |
| commit | e92d0abecfb11884e85a53f81966c66e5319942d (patch) | |
| tree | b60bc08b2ed4b28621ede6b89fb6de2d24145665 /newlib/libc/stdlib/mprec.c | |
| parent | 27bbefdefd339676bee4238e996df70e89fcdfa1 (diff) | |
| download | cygnal-e92d0abecfb11884e85a53f81966c66e5319942d.tar.gz cygnal-e92d0abecfb11884e85a53f81966c66e5319942d.tar.bz2 cygnal-e92d0abecfb11884e85a53f81966c66e5319942d.zip | |
Use NetBSD fix for CVE-2009-0689 security vulnerability.
* libc/include/sys/reent.h (_Kmax): Define here based on the sizeof
size_t, as in latest NetBSD.
* libc/reent/reent.c (_reclaim_reent): Use _Kmax rather than constant
value 15.
* libc/stdlib/mprec.c (_Kmax): Don't define here. Explain why.
Diffstat (limited to 'newlib/libc/stdlib/mprec.c')
| -rw-r--r-- | newlib/libc/stdlib/mprec.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/newlib/libc/stdlib/mprec.c b/newlib/libc/stdlib/mprec.c index 6e84ece5b..2b982ef55 100644 --- a/newlib/libc/stdlib/mprec.c +++ b/newlib/libc/stdlib/mprec.c @@ -86,8 +86,12 @@ #include <reent.h> #include "mprec.h" -/* reent.c knows this value */ +/* This is defined in sys/reent.h as (sizeof (size_t) << 3) now, as in NetBSD. + The old value of 15 was wrong and made newlib vulnerable against buffer + overrun attacks (CVE-2009-0689), same as other implementations of gdtoa + based on BSD code. #define _Kmax 15 +*/ _Bigint * _DEFUN (Balloc, (ptr, k), struct _reent *ptr _AND int k) |