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PR23805, NULL pointer dereference in elf_link_input_bfd

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PR 23805
	* elflink.c (elf_link_input_bfd): Don't segfault on finding
	STT_TLS symbols without any TLS sections.  Instead, change the
	symbol type to STT_NOTYPE.
This commit is contained in:
Alan Modra 2018-10-23 18:30:22 +10:30
parent ab419ddbb2
commit 102def4da8
2 changed files with 21 additions and 6 deletions
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7
bfd/ChangeLog
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@ -1,3 +1,10 @@
2018-10-23 Alan Modra <amodra@gmail.com>
PR 23805
* elflink.c (elf_link_input_bfd): Don't segfault on finding
STT_TLS symbols without any TLS sections. Instead, change the
symbol type to STT_NOTYPE.
2018-10-23 Alan Modra <amodra@gmail.com>
PR 23804

20
bfd/elflink.c
View File

@ -10489,8 +10489,11 @@ elf_link_input_bfd (struct elf_final_link_info *flinfo, bfd *input_bfd)
if (ELF_ST_TYPE (osym.st_info) == STT_TLS)
{
/* STT_TLS symbols are relative to PT_TLS segment base. */
BFD_ASSERT (elf_hash_table (flinfo->info)->tls_sec != NULL);
osym.st_value -= elf_hash_table (flinfo->info)->tls_sec->vma;
if (elf_hash_table (flinfo->info)->tls_sec != NULL)
osym.st_value -= elf_hash_table (flinfo->info)->tls_sec->vma;
else
osym.st_info = ELF_ST_INFO (ELF_ST_BIND (osym.st_info),
STT_NOTYPE);
}
}
@ -11046,12 +11049,17 @@ elf_link_input_bfd (struct elf_final_link_info *flinfo, bfd *input_bfd)
sym.st_value += osec->vma;
if (ELF_ST_TYPE (sym.st_info) == STT_TLS)
{
struct elf_link_hash_table *htab
= elf_hash_table (flinfo->info);
/* STT_TLS symbols are relative to PT_TLS
segment base. */
BFD_ASSERT (elf_hash_table (flinfo->info)
->tls_sec != NULL);
sym.st_value -= (elf_hash_table (flinfo->info)
->tls_sec->vma);
if (htab->tls_sec != NULL)
sym.st_value -= htab->tls_sec->vma;
else
sym.st_info
= ELF_ST_INFO (ELF_ST_BIND (sym.st_info),
STT_NOTYPE);
}
}