Bug 26478 - UBSAN error: bfd/mmo.c:2941:3:
Summary: UBSAN error: bfd/mmo.c:2941:3:
Status: RESOLVED FIXED
Alias: None
Product: binutils
Classification: Unclassified
Component: binutils (show other bugs)
Version: 2.34
: P2 normal
Target Milestone: 2.36
Assignee: Alan Modra
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2020-08-20 12:35 UTC by Martin Liska
Modified: 2020-08-26 14:38 UTC (History)
0 users

See Also:
Host:
Target:
Build:
Last reconfirmed:

Attachments
Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Martin Liska 2020-08-20 12:35:24 UTC 
The following fails when I build binutils with:
configure --build=x86_64-linux --disable-nls --disable-gdb --disable-gdbserver --disable-sim --disable-readline --disable-libdecnumber --enable-obsolete --target=mmix CFLAGS="-g -O2 -fsanitize=address,undefined -Wno-error" CXXLAGS="-g -O2 -fsanitize=address,undefined -Wno-error" LDFLAGS="-ldl"
Target: mmix
PASS: ld-mmix/b-loc64k
Executing on host: sh -c {/dev/shm/ueb5xm2p/ld/../binutils/objcopy  tmpdir/dump tmpdir/dump1 2>&1}  /dev/null dump.tmp (timeout = 300)
/home/mliska/Programming/binutils/bfd/mmo.c:2941:3: runtime error: null pointer passed as argument 2, which is declared to never be null
Comment 1 Sourceware Commits 2020-08-26 13:55:08 UTC 
The master branch has been updated by Alan Modra <amodra@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=00bc5e68b2c02fd2b1daacc37850840498595fb0

commit 00bc5e68b2c02fd2b1daacc37850840498595fb0
Author: Alan Modra <amodra@gmail.com>
Date:   Wed Aug 26 18:32:30 2020 +0930

    PR26478 UBSAN: mmo.c:2941 null pointer memcpy
    
            PR 26478
            * mmo.c (mmo_write_symbols_and_terminator): Don't memcpy empty table.
Comment 2 Alan Modra 2020-08-26 14:38:27 UTC 
Fixed