A series of fixes to addres problems detected by compiling the assembler with address sanitization enabled.

	PR 24538
gas	* macro.c (get_any_string): Increase size of buffer used to hold
	decimal value of expression result.
	* dw2gencfi.c (get_debugseg_name): Handle an empty name.
	* dwarf2dbg.c (get_filenum): Catch integer wraparound when
	extending allocate file array.
	(dwarf2_directive_filename): Add extra checks of the computed file
	number.
	* config/tc-arm.c (arm_tc_equal_in_insn): Insert copy of name into
	warning hash table.
	(s_arm_eabi_attribute): Check for obj_elf_vendor_attribute
	returning -1.
	* config/tc-i386.c (i386_output_nops): Catch an attempt to
	generate nops of negative lengths.
	* as.h (MAX_LITTLENUMS): Move definition to here from...
	* config/atof-ieee.c: ...here.
	* config/tc-aarch64.c: ...here.
	* config/tc-arc.c: ...here.
	* config/tc-arm.c: ...here.
	* config/tc-epiphany.c: ...here.
	* config/tc-i386.c: ...here.
	* config/tc-ia64.c: ...here.  (And correct the value).
	* config/tc-m32c.c: ...here.
	* config/tc-m32r.c: ...here.
	* config/tc-metag.c: ...here.
	* config/tc-microblaze.c: ...here.
	* config/tc-nds32.c: ...here.
	* config/tc-or1k.c: ...here.
	* config/tc-score.c: ...here.
	* config/tc-score7.c: ...here.
	* config/tc-tic4x.c: ...here.
	* config/tc-tilegx.c: ...here.
	* config/tc-tilepro.c: ...here.
	* config/tc-visium.c: ...here.
	* config/tc-sh.c (md_assemble): Add check for an instruction with
	no opcodes.
	* config/tc-mips.c (mips_lookup_insn): Add check for very short
	instruction name.
	* config/tc-tic54x.c: Use unsigned chars to access is_end_of_line
	array.
	(tic54x_start_line_hook): Check for an empty line.
	(next_line_shows_parallel): Do not walk off the end of the string.
	(tic54x_macro_start): Check for too much macro nesting.
	(tic54x_start_label): Add label_start parameter.  Use this
	parameter to check the first character of the label.
	* config/tc-tic54x.h (TC_START_LABEL_WITHOUT_COLON): Pass
	line_start variable to tic54x_start_label.

	PR 24538
opcodes	* ia64-opc.c (ia64_find_matching_opcode): Check for reaching the
	end of the table prematurely.

1 files changed, 14 insertions, 3 deletions

diff --git a/gas/dwarf2dbg.c b/gas/dwarf2dbg.c
index b77751d..cc36957 100644
--- a/gas/dwarf2dbg.c
+++ b/gas/dwarf2dbg.c
@@ -751,8 +751,14 @@ get_filenum (const char *filename, unsigned int num)
       unsigned int old = files_allocated;
 
       files_allocated = i + 32;
-      files = XRESIZEVEC (struct file_entry, files, files_allocated);
+      /* Catch wraparound.  */
+      if (files_allocated <= old)
+	{
+	  as_bad (_("file number %u is too big"), i);
+	  return 0;
+	}
 
+      files = XRESIZEVEC (struct file_entry, files, files_allocated);
       memset (files + old, 0, (i + 32 - old) * sizeof (struct file_entry));
     }
 
@@ -803,13 +809,18 @@ dwarf2_directive_filename (void)
      being supplied.  Turn off gas generated debug info.  */
   debug_type = DEBUG_NONE;
 
-  if (num < (int) files_in_use && files[num].filename != 0)
+  if (num < (offsetT) files_in_use && files[num].filename != 0)
     {
       as_bad (_("file number %ld already allocated"), (long) num);
       return NULL;
     }
+  else if (num < 0)
+    {
+      as_bad (_("file number %ld is too small!"), (long) num);
+      return NULL;
+    }
 
-  get_filenum (filename, num);
+  get_filenum (filename, (unsigned int) num);
 
   return filename;
 }