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bfd: alpha: Fix crash caused by double free with --no-keep-memory

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Without this, ld has been seen to crash in libc when freeing tsec_free:

*** Error in `/usr/bin/ld': double free or corruption (!prev): 0x0000000120ceb6a0 ***

_bfd_elf_link_read_relocs will always return the cached value if
present, even if keep_memory is false, therefore setting tsec_free to
NULL only when keep_memory is true is not sufficient.

	* elf64-alpha.c (elf64_alpha_relax_opt_call): Don't set tsec_free
	if relocs are cached.
This commit is contained in:
James Clarke 2017-01-03 16:15:15 +00:00 committed by Alan Modra
parent cc917fd93d
commit ae4fda6638
2 changed files with 8 additions and 1 deletions
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5
bfd/ChangeLog
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@ -1,3 +1,8 @@
2017-01-04 James Clarke <jrtc27@jrtc27.com>
* elf64-alpha.c (elf64_alpha_relax_opt_call): Don't set tsec_free
if relocs are cached.
2017-01-03 Rich Felker <bugdal@aerifal.cx>
PR ld/21017

4
bfd/elf64-alpha.c
View File

@ -3215,7 +3215,9 @@ elf64_alpha_relax_opt_call (struct alpha_relax_info *info, bfd_vma symval)
if (tsec_relocs == NULL)
return 0;
tsec_relend = tsec_relocs + info->tsec->reloc_count;
tsec_free = (info->link_info->keep_memory ? NULL : tsec_relocs);
tsec_free = (elf_section_data (info->tsec)->relocs == tsec_relocs
? NULL
: tsec_relocs);
}
/* Recover the symbol's offset within the section. */