From: "mark at klomp dot org" <sourceware-bugzilla@sourceware.org>
To: elfutils-devel@sourceware.org
Subject: [Bug libdw/28720] UBSan: member access within misaligned address 0x7f6e8d80f142 for type 'struct Elf32_Phdr', which requires 4 byte alignment
Date: Mon, 03 Jan 2022 23:42:20 +0000 [thread overview]
Message-ID: <bug-28720-10460-gfdcOYEGQ9@http.sourceware.org/bugzilla/> (raw)
In-Reply-To: <bug-28720-10460@http.sourceware.org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=28720
--- Comment #7 from Mark Wielaard <mark at klomp dot org> ---
(In reply to Evgeny Vereshchagin from comment #5)
> Created attachment 13875 [details]
> File triggering "member access within misaligned address"
Thanks. afl++ also found this (but only after 8 days...)
I pushed:
commit 9f70a762ab88ceebb8a48a7c9c3ce39ff7f205af
Author: Mark Wielaard <mark@klomp.org>
Date: Fri Dec 24 02:01:32 2021 +0100
libdwfl: Calculate addr to read by hand in link_map.c read_addrs.
The gcc undefined sanitizer doesn't like the trick we use to calculate
the (possibly) unaligned addresses to read. So calculate them by hand
as unsigned char pointers.
https://sourceware.org/bugzilla/show_bug.cgi?id=28720
Signed-off-by: Mark Wielaard <mark@klomp.org>
Which should this particular issue.
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next prev parent reply other threads:[~2022-01-03 23:42 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-22 0:35 [Bug libdw/28720] New: " evvers at ya dot ru
2021-12-22 1:00 ` [Bug libdw/28720] " evvers at ya dot ru
2021-12-24 1:10 ` mark at klomp dot org
2021-12-24 8:05 ` evvers at ya dot ru
2021-12-24 8:06 ` evvers at ya dot ru
2021-12-24 8:07 ` evvers at ya dot ru
2021-12-24 8:17 ` evvers at ya dot ru
2022-01-03 23:42 ` mark at klomp dot org [this message]
2022-01-04 18:58 ` evvers at ya dot ru
2022-01-04 19:21 ` evvers at ya dot ru
2022-01-04 21:37 ` mark at klomp dot org
2022-01-04 22:02 ` evvers at ya dot ru
2022-01-06 0:51 ` evvers at ya dot ru
2022-01-06 15:55 ` mark at klomp dot org
2022-01-06 16:41 ` mark at klomp dot org
2022-01-06 17:04 ` mark at klomp dot org
2022-01-06 17:36 ` evvers at ya dot ru
2022-01-06 20:52 ` evvers at ya dot ru
2022-01-07 16:39 ` mark at klomp dot org
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