https://sourceware.org/bugzilla/show_bug.cgi?id=28542
Bug ID: 28542
Summary: Undefined behaviours in readelf.c
Product: binutils
Version: 2.38 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: binutils
Assignee: unassigned at sourceware dot org
Reporter: shaohua.li at inf dot ethz.ch
Target Milestone: ---
Created attachment 13758
--> https://sourceware.org/bugzilla/attachment.cgi?id=13758&action=edit
poc_undefined
Hi there,
I compiled binutils (git Head) with -fsanitize=undefined, and found the
sanitizer complained on two locations in readelf.c.
Another consequence of this issue is: if you compile binutils with gcc11, you
would find their outputs are different.
- Compiler: clang13 (compile with -fsanitize=undefined)
- Platform: Ubuntu 20.04.3 LTS, x86_64
- Reproduce: run `readelf -aD poc_undefined | grep Undefined`
Undefined sanitizer report:
===============
readelf.c:1761:15: runtime error: applying non-zero offset 320 to null pointer
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior readelf.c:1761:15 in
861,863c85
readelf.c:12635:18: runtime error: applying non-zero offset 320 to null pointer
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior readelf.c:12635:18
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