Description of problem: Recent versions of libresolv from glibc-2.8.90 and above are hitting a massive number of unaligned access warnings. This are commonly seem when using yum. yum(6912): unaligned access to 0x60000fffffe5fdbe, ip=0x20000000069569f1 yum(6912): unaligned access to 0x60000fffffe5fdbe, ip=0x2000000006956a10 yum(6912): unaligned access to 0x60000fffffe5fdbe, ip=0x2000000006956a40 yum(6912): unaligned access to 0x60000fffffe5fdbe, ip=0x2000000006959350 yum(6912): unaligned access to 0x60000fffffe60885, ip=0x200000000695b6d0 The culprit appears to bit this bit of code in resolv/res_query.c 143 n = res_nmkquery(statp, QUERY, name, class, T_A, NULL, 0, NULL, 144 query1, bufsize); 145 if (n > 0) 146 { 147 if ((oflags & RES_F_EDNS0ERR) == 0 148 && (statp->options & RES_USE_EDNS0) != 0) 149 n = __res_nopt(statp, n, query1, bufsize, anslen / 2); 150 151 nquery1 = n; 152 query2 = buf + nquery1; 153 n = res_nmkquery(statp, QUERY, name, class, T_AAAA, NULL, 0, 154 NULL, query2, bufsize - n); I think what is happening here is the first call to res_nmkquery (line 153) returns a 1 and also the if statement on lines 147/148 is false. Then we add 1 to buf which is always going to give is an unaligned pointer. Much of this is a guess however. I am not quite sure what the code is trying to do here. It really looks like we are missing { } after the line 147/148 if statement. Version-Release number of selected component (if applicable): glibc-2.8.90-5 How reproducible: 100% Steps to Reproduce: 1. on ia64 with recent rawhide bits run yum 2. 3. Actual results: Expected results: Additional info:
Should now be fixed upstream.
Should be fixed in 2.8.90-9. Reopen if necessary.