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[opcodes/arm] Fix potential null pointer dereferences

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PR tdep/29598

  As pointed out in the bug ticket, we have a couple potential null pointer
  dereferencing situations. Harden those.

  Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=29598
This commit is contained in:
Luis Machado 2022-11-02 07:17:46 +00:00
parent 94355de775
commit 76a95facf1
1 changed files with 5 additions and 1 deletions
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6
opcodes/arm-dis.c
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@ -12484,6 +12484,10 @@ mapping_symbol_for_insn (bfd_vma pc, struct disassemble_info *info,
bool found = false;
bool can_use_search_opt_p = false;
/* Sanity check. */
if (info == NULL)
return false;
/* Default to DATA. A text section is required by the ABI to contain an
INSN mapping symbol at the start. A data section has no such
requirement, hence if no mapping symbol is found the section must
@ -12497,7 +12501,7 @@ mapping_symbol_for_insn (bfd_vma pc, struct disassemble_info *info,
type = MAP_ARM;
struct arm_private_data *private_data;
if (info->private_data == NULL
if (info->private_data == NULL || info->symtab == NULL
|| info->symtab_size == 0
|| bfd_asymbol_flavour (*info->symtab) != bfd_target_elf_flavour)
return false;