https://sourceware.org/bugzilla/show_bug.cgi?id=20241
Bug ID: 20241
Summary: plugin lto + archive: invalid read access might cause
SIGSEGV
Product: binutils
Version: 2.27 (HEAD)
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: ld
Assignee: unassigned at sourceware dot org
Reporter: frederic.germain at gmail dot com
Target Milestone: ---
Hi,
I got that bug on ld.bfd on arm-none-eabi-binutils-cs toolchain on fedora when
using LTO on archive file : https://bugzilla.redhat.com/show_bug.cgi?id=1343670
After further investigation and the help of valgrind, it seems some bad memory
access are made in add_archive_element, and can cause strange log (if --verbose
option is present) or SIGSEGV depending on which toolchain I tried.
It is still happening on HEAD, so opening a bug here.
==15446== Invalid read of size 8
==15446== at 0x4175C8: add_archive_element (ldmain.c:866)
==15446== by 0x46F070: elf_link_add_archive_symbols (elflink.c:5050)
==15446== by 0x46F070: bfd_elf_link_add_symbols (elflink.c:5106)
==15446== by 0x411203: load_symbols (ldlang.c:2863)
==15446== by 0x411DB4: open_input_bfds (ldlang.c:3320)
==15446== by 0x411C76: open_input_bfds (ldlang.c:3275)
==15446== by 0x414219: lang_process (ldlang.c:6685)
==15446== by 0x40374C: main (ldmain.c:418)
==15446== Address 0x59712c0 is 192 bytes inside a block of size 256 free'd
==15446== at 0x4C29CF0: free (vg_replace_malloc.c:530)
==15446== by 0x42F53E: bfd_close (opncls.c:743)
==15446== by 0x41F3C4: plugin_maybe_claim (plugin.c:890)
==15446== by 0x4174EA: add_archive_element (ldmain.c:809)
==15446== by 0x46F070: elf_link_add_archive_symbols (elflink.c:5050)
==15446== by 0x46F070: bfd_elf_link_add_symbols (elflink.c:5106)
==15446== by 0x411203: load_symbols (ldlang.c:2863)
==15446== by 0x411DB4: open_input_bfds (ldlang.c:3320)
==15446== by 0x411C76: open_input_bfds (ldlang.c:3275)
==15446== by 0x414219: lang_process (ldlang.c:6685)
==15446== by 0x40374C: main (ldmain.c:418)
==15446== Block was alloc'd at
==15446== at 0x4C2A988: calloc (vg_replace_malloc.c:711)
==15446== by 0x42E142: bfd_zmalloc (libbfd.c:317)
==15446== by 0x42EFCA: _bfd_new_bfd (opncls.c:61)
==15446== by 0x42F197: bfd_fopen (opncls.c:197)
==15446== by 0x423D96: _bfd_get_elt_at_filepos (archive.c:685)
==15446== by 0x46F029: elf_link_add_archive_symbols (elflink.c:5041)
==15446== by 0x46F029: bfd_elf_link_add_symbols (elflink.c:5106)
==15446== by 0x411203: load_symbols (ldlang.c:2863)
==15446== by 0x411DB4: open_input_bfds (ldlang.c:3320)
==15446== by 0x411C76: open_input_bfds (ldlang.c:3275)
==15446== by 0x414219: lang_process (ldlang.c:6685)
==15446== by 0x40374C: main (ldmain.c:418)
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