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Prevent an over large memory allocation in readelf when parsing a corrupt DWARF file.

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PR 30227
  * dwarf.c (process_cu_tu_index): Prevent excessive memory allocation when nused is large and ncols is zero.
This commit is contained in:
Nick Clifton 2023-03-14 13:15:12 +00:00
parent ff581559f9
commit 97b75c421f
2 changed files with 9 additions and 0 deletions
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6
binutils/ChangeLog
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@ -1,3 +1,9 @@
2023-03-14 Nick Clifton <nickc@redhat.com>
PR 30227
* dwarf.c (process_cu_tu_index): Prevent excessive memory
allocation when nused is large and ncols is zero.
2023-02-09 Tom Tromey <tromey@adacore.com>
* dwarf-mode.el: Bump version to 1.8.

3
binutils/dwarf.c
View File

@ -10912,6 +10912,9 @@ process_cu_tu_index (struct dwarf_section *section, int do_display)
if (nused == -1u
|| _mul_overflow ((size_t) ncols, 4, &temp)
|| _mul_overflow ((size_t) nused + 1, temp, &total)
|| total > (size_t) (limit - ppool)
/* PR 30227: ncols could be 0. */
|| _mul_overflow ((size_t) nused + 1, 4, &total)
|| total > (size_t) (limit - ppool))
{
warn (_("Section %s too small for offset and size tables\n"),