On 23/11/16 17:30, Jim Meyering wrote: > On Wed, Nov 23, 2016 at 5:22 AM, Marcel Böhme <[email protected]> wrote: >> Dear all, >> >> We are running small 1h fuzzing sessions with AFLFast, a fork of AFL. >> We’ll be reporting each found bug separately. >> >> On Coreutils v8.25 and trunk, the following input crashes. >> Option -n was introduced with v8.8. >> >> $ ./split -n7/75 7 >> Segmentation fault >> >> ASAN says: >> ================================================================= >> ==53143==ERROR: AddressSanitizer: negative-size-param: (size=-6) >> #0 0x7f8820eb9a10 in memmove >> (/usr/lib/x86_64-linux-gnu/libasan.so.3+0x62a10) >> #1 0x404d12 in memmove /usr/include/x86_64-linux-gnu/bits/string3.h:57 >> #2 0x404d12 in bytes_chunk_extract ../src/split.c:987 >> #3 0x404d12 in main ../src/split.c:1625 >> #4 0x7f881fd9cf44 in __libc_start_main >> (/lib/x86_64-linux-gnu/libc.so.6+0x21f44) >> #5 0x4064a9 >> (/home/ubuntu/subjects/coreutils/obj-asan/src/split+0x4064a9) >> >> 0x7f8821f9a006 is located 2054 bytes inside of 135168-byte region >> [0x7f8821f99800,0x7f8821fba800) >> allocated by thread T0 here: >> #0 0x7f8820f193a8 in __interceptor_malloc >> (/usr/lib/x86_64-linux-gnu/libasan.so.3+0xc23a8) >> #1 0x40ec88 in xmalloc ../lib/xmalloc.c:41 >> >> SUMMARY: AddressSanitizer: negative-size-param >> (/usr/lib/x86_64-linux-gnu/libasan.so.3+0x62a10) in memmove > > Thank you for the report. > Would you please provide the contents of your file named "7"?
That's immaterial I think. I can reproduce with: src/split -n2/3 /dev/null I'll dig into these
