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readelf: Update check for invalid word offsets in ARM unwind information.

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PR binutils/21343
	* readelf.c (get_unwind_section_word): Fix snafu checking for
	invalid word offsets in ARM unwind information.
This commit is contained in:
Nick Clifton
2017-04-03 11:01:45 +01:00
parent 12bfb8fec3
commit f32ba72991
2 changed files with 9 additions and 3 deletions
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6
binutils/ChangeLog
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@ -1,3 +1,9 @@
2017-04-03 Nick Clifton <nickc@redhat.com>
PR binutils/21343
* readelf.c (get_unwind_section_word): Fix snafu checking for
invalid word offsets in ARM unwind information.
2017-03-31 Pip Cet <pipcet@gmail.com>
* NEWS: Use "WebAssembly" consistently.

6
binutils/readelf.c
View File

@ -8053,9 +8053,9 @@ get_unwind_section_word (struct arm_unw_aux_info * aux,
return FALSE;
/* If the offset is invalid then fail. */
if (word_offset > (sec->sh_size - 4)
/* PR 18879 */
|| (sec->sh_size < 5 && word_offset >= sec->sh_size)
if (/* PR 21343 *//* PR 18879 */
sec->sh_size < 4
|| word_offset > (sec->sh_size - 4)
|| ((bfd_signed_vma) word_offset) < 0)
return FALSE;