Comment #1 on issue 45631 by da...@adalogics.com: elfutils:fuzz-libdwfl: Use-of-uninitialized-value in __libdw_gunzip https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=45631#c1
MSAN report Running: /mnt/scratch0/clusterfuzz/bot/inputs/fuzzer-testcases/crash-cdd503eda6f927979a20a3bd4c08c8182cdf2ff5 ==593068==WARNING: MemorySanitizer: use-of-uninitialized-value #0 0x55eeb6 in zlib_fail /src/elfutils/libdwfl/gzip.c:132:3 #1 0x55eeb6 in __libdw_gunzip /src/elfutils/libdwfl/gzip.c:387:11 #2 0x540817 in decompress /src/elfutils/libdwfl/open.c:66:11 #3 0x5400d7 in what_kind /src/elfutils/libdwfl/open.c:114:12 #4 0x5400d7 in libdw_open_elf /src/elfutils/libdwfl/open.c:134:22 #5 0x53f505 in __libdw_open_file /src/elfutils/libdwfl/open.c:197:10 #6 0x52cea7 in __libdwfl_report_offline /src/elfutils/libdwfl/offline.c:281:22 #7 0x52cea7 in dwfl_report_offline /src/elfutils/libdwfl/offline.c:316:10 #8 0x52747b in LLVMFuzzerTestOneInput /src/fuzz-libdwfl.c:47:22 #9 0x4552f2 in fuzzer::Fuzzer::ExecuteCallback(unsigned char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerLoop.cpp:611:15 #10 0x440ea2 in fuzzer::RunOneTest(fuzzer::Fuzzer*, char const*, unsigned long) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:324:6 #11 0x44670c in fuzzer::FuzzerDriver(int*, char***, int (*)(unsigned char const*, unsigned long)) /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerDriver.cpp:860:9 #12 0x46f0a2 in main /src/llvm-project/compiler-rt/lib/fuzzer/FuzzerMain.cpp:20:10 #13 0x7f5b32dd40b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/libc-start.c:308:16 #14 0x41f5ed in _start Uninitialized value was created by an allocation of 'code' in the stack frame of function '__libdw_gunzip' #0 0x55cde0 in __libdw_gunzip /src/elfutils/libdwfl/gzip.c:184 SUMMARY: MemorySanitizer: use-of-uninitialized-value (/mnt/scratch0/clusterfuzz/bot/builds/clusterfuzz-builds_elfutils_3ee01cb67db1a71e7adeb7f3f14722ea62f13cd5/revisions/fuzz-libdwfl+0x55eeb6) Unique heap origins: 44 Stack depot allocated bytes: 1638400 Unique origin histories: 7 History depot allocated bytes: 196608 Exiting -- You received this message because: 1. You were specifically CC'd on the issue You may adjust your notification preferences at: https://bugs.chromium.org/hosting/settings Reply to this email to add a comment.