[PATCH 1/6] build-sys: make scanf_cv_alloc_modifier to work [AddressSanitizer]

Sami Kerola
2014-11-10T21:50:04Z

The tests failed with following message in config.log

ERROR: LeakSanitizer: detected memory leaks

Direct leak of 2 byte(s) in 1 object(s) allocated from:
#0 0x49a40e in realloc (/home/src/util-linux/conftest+0x49a40e)
#1 0x7fbe48633e69 in __GI__IO_vfscanf (/usr/lib/libc.so.6+0x56e69)
#2 0x7fbe48649786 in _IO_vsscanf (/usr/lib/libc.so.6+0x6c786)

which knocked out libmount from build, and commands depending on it.

The reason this change makes sense is that AddressSanitizer seems like a
good addition to set of tools that util-linux package can use, when and
if needed.

Reference: https://code.google.com/p/address-sanitizer/wiki/AddressSanitizer
Signed-off-by: Sami Kerola <kerolasa@iki.fi>
---
configure.ac | 1 +
1 file changed, 1 insertion(+)

diff --git a/configure.ac b/configure.ac
index 1336f8d..b8a6627 100644
--- a/configure.ac
+++ b/configure.ac
@@ -461,6 +461,7 @@ int main()
int i;
char *s;
i = sscanf("x", $1, &s);
+ free(s);
if (i == 1)
return 0;
return 1;
--
2.1.3