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author | jilles <jilles@FreeBSD.org> | 2013-08-31 22:32:42 +0000 |
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committer | jilles <jilles@FreeBSD.org> | 2013-08-31 22:32:42 +0000 |
commit | ee4b8e07a829f3d8f11cf458601290079e0ed62f (patch) | |
tree | f73c21f9b8d1e27c2aa3ff9c34ace0b9a837e4e0 /lib/libc/string | |
parent | f95e394e35406c2782ecb7801ea1535558f8c464 (diff) | |
download | FreeBSD-src-ee4b8e07a829f3d8f11cf458601290079e0ed62f.zip FreeBSD-src-ee4b8e07a829f3d8f11cf458601290079e0ed62f.tar.gz |
libc: Always use our own copy of sys_errlist and sys_nerr (.so only).
This ensures strerror() and friends continue to work correctly even if a
(non-PIE) executable linked against an older libc imports sys_errlist (which
causes sys_errlist to refer to the executable's copy with a size fixed when
that executable was linked).
The executable's use of sys_errlist remains broken because it uses the
current value of sys_nerr and may access past the bounds of the array.
Different from the message "Using sys_errlist from executables is not
ABI-stable" on freebsd-arch, this change does not affect the static library.
There seems no reason to prevent overriding the error messages in the static
library.
Diffstat (limited to 'lib/libc/string')
-rw-r--r-- | lib/libc/string/strerror.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/lib/libc/string/strerror.c b/lib/libc/string/strerror.c index e11b351..1d7a385 100644 --- a/lib/libc/string/strerror.c +++ b/lib/libc/string/strerror.c @@ -42,6 +42,8 @@ __FBSDID("$FreeBSD$"); #include <string.h> #include <stdio.h> +#include "errlst.h" + #define UPREFIX "Unknown error" /* @@ -87,7 +89,7 @@ strerror_r(int errnum, char *strerrbuf, size_t buflen) catd = catopen("libc", NL_CAT_LOCALE); #endif - if (errnum < 0 || errnum >= sys_nerr) { + if (errnum < 0 || errnum >= __hidden_sys_nerr) { errstr(errnum, #if defined(NLS) catgets(catd, 1, 0xffff, UPREFIX), @@ -99,9 +101,9 @@ strerror_r(int errnum, char *strerrbuf, size_t buflen) } else { if (strlcpy(strerrbuf, #if defined(NLS) - catgets(catd, 1, errnum, sys_errlist[errnum]), + catgets(catd, 1, errnum, __hidden_sys_errlist[errnum]), #else - sys_errlist[errnum], + __hidden_sys_errlist[errnum], #endif buflen) >= buflen) retval = ERANGE; |