[Bug libdw/28720] UBSan: member access within misaligned address 0x7f6e8d80f142 for type 'struct Elf32_Phdr', which requires 4 byte alignment

evvers at ya dot ru sourceware-bugzilla@sourceware.org
Fri Dec 24 08:17:40 GMT 2021


--- Comment #6 from Evgeny Vereshchagin <evvers at ya dot ru> ---
(In reply to Mark Wielaard from comment #2)
> Interesting. I did run afl for some time (more than a day) and it found some
> more issues, but none of these (yet?). I'll try honggfuzz in the future to
> see if it can find some more.

FWIW https://sourceware.org/pipermail/elfutils-devel/2021q4/004584.html should
make it much more easier to use honggfuzz. It's safe to say that it was
battle-tested in the sense that it's compatible with gcc, clang, ASan, UBsan
and so on. Something like `make check V=1 VERBOSE=1 TESTS=run-fuzz-dwfl-core.sh
FUZZ_TIME=3600` allows running the fuzz target for an hour with honggfuzz (if
elfutils is built with `--enable-honggfuzz`)

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