Bug 4923 - ld exits with segmentation fault after upgrading from gcc-4.1.2-15 to gcc-4.1.2-16
Summary: ld exits with segmentation fault after upgrading from gcc-4.1.2-15 to gcc-4.1...
Status: RESOLVED FIXED
Alias: None
Product: binutils
Classification: Unclassified
Component: ld (show other bugs)
Version: 2.17
: P2 normal
Target Milestone: ---
Assignee: Alan Modra
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2007-08-14 18:04 UTC by Carsten Emde
Modified: 2007-08-15 06:06 UTC (History)
1 user (show)

See Also:
Host: i386-redhat-linux
Target: i386-redhat-linux
Build: i386-redhat-linux
Last reconfirmed: 2007-08-15 01:34:20

Attachments
self-contained testcase (1.62 KB, application/octet-stream)
2007-08-14 18:17 UTC, Carsten Emde 		Details
Patch to prevent NULL pointer to be dereferenced (382 bytes, patch)
2007-08-14 18:21 UTC, Carsten Emde 		Details | Diff
View All 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 Carsten Emde 2007-08-14 18:04:26 UTC 
After upgrading from gcc-4.1.2-15 to gcc-4.1.2-16, the additional command line
option --build-id is passed to ld via collect2 which may let ld crash with
segmentation fault.
Comment 1 Carsten Emde 2007-08-14 18:15:48 UTC 
How to reproduce
- Unpack the attached archive
- Run ./crash-it.sh

If the --build-id option is omitted, the output is built
- Run ./build-it.sh
Comment 2 Carsten Emde 2007-08-14 18:17:37 UTC 
Created attachment 1963 [details]
self-contained testcase
Comment 3 Carsten Emde 2007-08-14 18:20:16 UTC 
ld crashes at line 1065/1066 of emultempl/elf32.em
      t->after_write_object_contents
          = &gld${EMULATION_NAME}_write_build_id_section;
since t becomes NULL and cannot be dereferenced. After applying the 
attached patch, ld no longer crashes. This is only to harden ld against this
situation - the underlying mechanism that allows t to become NULL is not cured.
Comment 4 Carsten Emde 2007-08-14 18:21:46 UTC 
Created attachment 1964 [details]
Patch to prevent NULL pointer to be dereferenced
Comment 5 Carsten Emde 2007-08-14 19:45:54 UTC 
All observations have been made on a Fedora 8 system, latest development
packages installed.

Current versions:
binutils-2.17.50.0.17-7
gcc-4.1.2-17