Bug 1302075

Summary: ld.bfd segfaults in objalloc_free
Product: [Fedora] Fedora Reporter: Uros Bizjak <ubizjak>
Component: binutilsAssignee: Nick Clifton <nickc>
Status: CLOSED EOL QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 23CC: dhowells, hongjiu.lu, jakub, nickc
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Hardware: x86_64   
OS: Linux   
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Fixed In Version: Doc Type: Bug Fix
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Last Closed: 2016-12-20 18:14:10 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Flags
object files and libraries to trigger segfault none

Description Uros Bizjak 2016-01-26 17:39:39 UTC
Created attachment 1118561 [details]
object files and libraries to trigger segfault

Description of problem:

ld.bfd segfaults with attached object and library with following flags:

ld.bfd --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -r 20100430-1_0.o libgcov.a

Version-Release number of selected component (if applicable):

$ ld.bfd --version
GNU ld version 2.25-15.fc23

How reproducible:

Always.

Steps to Reproduce:

$ ld.bfd --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -r 20100430-1_0.o libgcov.a
Segmentation fault (core dumped)

Actual results:

Segmentation fault (core dumped)

Expected results:

Well, linking without segfault.

Additional info:

gdb session:

(gdb) r
Starting program: /usr/bin/ld.bfd --eh-frame-hdr -m elf_x86_64 -dynamic-linker /lib64/ld-linux-x86-64.so.2 -r 20100430-1_0.o libgcov.a

Program received signal SIGSEGV, Segmentation fault.
objalloc_free (o=0x0) at ./objalloc.c:181
181       l = (struct objalloc_chunk *) o->chunks;
(gdb) bt
#0  objalloc_free (o=0x0) at ./objalloc.c:181
#1  0x00007ffff7b0129d in bfd_hash_table_free (table=table@entry=0x555555831be0 <lang_definedness_table>) at hash.c:426
#2  0x0000555555572559 in lang_finish () at ldlang.c:1274
#3  cmdline_emit_object_only_section () at ldlang.c:9004
#4  0x000055555555f583 in main (argc=9, argv=0x7fffffffdc58) at ./ldmain.c:487


FYI, ld.gold works OK with provided flags.

Comment 1 H.J. Lu 2016-01-26 18:56:22 UTC
It was caused by binutils-2.25-kernel-ld-r.patch which has been
obsoleted by users/hjl/lto-mixed/master branch.

Comment 2 David Howells 2016-01-27 16:03:28 UTC
I tried the testcase above:

 (*) F23 system binutils - the SEGV happens.

 (*) cross-binutils rebased on F24's system binutils-2.26, all patches applied - works (or, at least, doesn't SEGV).

 (*) cross-binutils rebased on F24's system binutils-2.26 with the binutils-2.25-kernel-ld-r.patch and binutils-2.25.1-plugin-format-checking.patch patches removed - works (or, at least, doesn't SEGV).

Comment 3 Fedora End Of Life 2016-11-24 15:13:15 UTC
This message is a reminder that Fedora 23 is nearing its end of life.
Approximately 4 (four) weeks from now Fedora will stop maintaining
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Comment 4 Fedora End Of Life 2016-12-20 18:14:10 UTC
Fedora 23 changed to end-of-life (EOL) status on 2016-12-20. Fedora 23 is
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