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Fix a dereference of NULL when scanning the symbol hashes array in the ARM linker.

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PR 29852
	* elf32-arm.c (cmse_scan): Check for NULL entries in the
	sym_hashes array.
	(elf32_arm_gc_mark_extra_sections): Likewise.
This commit is contained in:
Nick Clifton
2022-12-06 11:24:12 +00:00
parent 8db40179f0
commit 83f18e5ebe
2 changed files with 12 additions and 0 deletions
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7
bfd/ChangeLog
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@ -1,3 +1,10 @@
2022-12-06 Nick Clifton <nickc@redhat.com>
PR 29852
* elf32-arm.c (cmse_scan): Check for NULL entries in the
sym_hashes array.
(elf32_arm_gc_mark_extra_sections): Likewise.
2022-12-05 Nick Clifton <nickc@redhat.com> 2022-12-05 Nick Clifton <nickc@redhat.com>
PR 29848 PR 29848

5
bfd/elf32-arm.c
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@ -6008,6 +6008,9 @@ cmse_scan (bfd *input_bfd, struct elf32_arm_link_hash_table *htab,
else else
{ {
cmse_hash = elf32_arm_hash_entry (sym_hashes[i - ext_start]); cmse_hash = elf32_arm_hash_entry (sym_hashes[i - ext_start]);
if (cmse_hash == NULL)
continue;
sym_name = (char *) cmse_hash->root.root.root.string; sym_name = (char *) cmse_hash->root.root.root.string;
if (!startswith (sym_name, CMSE_PREFIX)) if (!startswith (sym_name, CMSE_PREFIX))
continue; continue;
@ -15987,6 +15990,8 @@ elf32_arm_gc_mark_extra_sections (struct bfd_link_info *info,
for (i = ext_start; i < sym_count; i++) for (i = ext_start; i < sym_count; i++)
{ {
cmse_hash = elf32_arm_hash_entry (sym_hashes[i - ext_start]); cmse_hash = elf32_arm_hash_entry (sym_hashes[i - ext_start]);
if (cmse_hash == NULL)
continue;
/* Assume it is a special symbol. If not, cmse_scan will /* Assume it is a special symbol. If not, cmse_scan will
warn about it and user can do something about it. */ warn about it and user can do something about it. */