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Segfaults and double free errors using getaddrinfo_a
- From: Daurnimator <quae at daurnimator dot com>
- To: libc-help at sourceware dot org
- Date: Wed, 11 Jul 2012 18:25:17 +1000
- Subject: Segfaults and double free errors using getaddrinfo_a
While using getaddrinfo_a through the luajit ffi
(http://luajit.org/ext_ffi.html) I keep getting segfaults or double
free errors.
The errors seems to disappear if I use LD_PRELOAD=/lib/libpthread.so
I've been unable to reduce the code down to a C test case, so all I
can show is some luajit code: http://codepad.org/lyLVwfAd
Example backtrace:
*** glibc detected *** luajit: double free or corruption (out):
0x00007fc000000940 ***
======= Backtrace: =========
/lib/libc.so.6(+0x784a6)[0x7fc00e62a4a6]
/lib/libc.so.6(fclose+0x14d)[0x7fc00e61adcd]
/lib/libnss_files.so.2(+0x3a25)[0x7fc00df88a25]
/lib/libnss_files.so.2(_nss_files_gethostbyname4_r+0x2e9)[0x7fc00df89e69]
/lib/libc.so.6(+0xce95a)[0x7fc00e68095a]
/lib/libc.so.6(getaddrinfo+0xf4)[0x7fc00e683d34]
/usr/lib/libanl.so(+0x1029)[0x7fc00e3af029]
/lib/libpthread.so.0(+0x7e0f)[0x7fc00e199e0f]
/lib/libc.so.6(clone+0x6d)[0x7fc00e69604d]