Date: Fri, 22 Jun 2012 19:36:03 +0530 From: Dhiru Kholia <dhiru.kholia@...il.com> To: john-dev@...ts.openwall.com Subject: bug or false alarm in BSDI format with clang Hi, I compile JtR using "make linux-x86-64-clang-debug. Running "../run/john -format=BSDI -t" crashed with following output. Benchmarking: BSDI DES (x725) [128/128 BS SSE2-16]... ================================================================= ==4865== ERROR: AddressSanitizer global-buffer-overflow on address 0x00000069e041 at pc 0x416d93 bp 0x7fff50725a30 sp 0x7fff50725a28 READ of size 1 at 0x00000069e041 thread T0 #0 0x416d93 (/home/dsk/magnum-jumbo/run/john+0x416d93) 0x00000069e041 is located 0 bytes to the right of global variable '.str12 (formats.c)' (0x69e040) of size 1 '.str12 (formats.c)' is ascii string '' ==4865== ABORTING Stats: 0M malloced (0M for red zones) by 28 calls Stats: 0M realloced by 0 calls Stats: 0M freed by 5 calls Stats: 0M really freed by 0 calls Stats: 20M (5123 full pages) mmaped in 5 calls mmaps by size class: 8:16383; 10:4095; 12:1024; 13:512; 17:32; mallocs by size class: 8:11; 10:5; 12:2; 13:1; 17:9; frees by size class: 10:5; rfrees by size class: Stats: malloc large: 9 small slow: 4 Shadow byte and word: 0x1000000d3c08: 1 0x1000000d3c08: 01 f9 f9 f9 f9 f9 f9 f9 More shadow bytes: 0x1000000d3be8: 00 04 f9 f9 f9 f9 f9 f9 0x1000000d3bf0: 00 04 f9 f9 f9 f9 f9 f9 0x1000000d3bf8: 00 06 f9 f9 f9 f9 f9 f9 0x1000000d3c00: 00 04 f9 f9 f9 f9 f9 f9 =>0x1000000d3c08: 01 f9 f9 f9 f9 f9 f9 f9 0x1000000d3c10: 04 f9 f9 f9 f9 f9 f9 f9 0x1000000d3c18: 05 f9 f9 f9 f9 f9 f9 f9 0x1000000d3c20: 04 f9 f9 f9 f9 f9 f9 f9 0x1000000d3c28: 00 00 00 00 00 00 00 00 ... On further debugging, $ addr2line -a 0x00000069e041 -e a.out 0x000000000069e041 sse-intrinsics.c:0 $ addr2line -a 0x416d93 -e ../run/john 0x0000000000416d93 /home/dsk/magnum-jumbo/src/DES_std.c:659 >> DES_key = key & 0x7F; Can someone familiar with the format take a look? Testing DES itself which uses the same code (guessing?) passes with no problems. -- Cheers, Dhiru
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