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| author | Nick Clifton <nickc@redhat.com> | 2014-11-27 12:19:10 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2014-11-27 12:19:10 +0000 |
| commit | 1036838a771b96ad9428e8fc7ecc45d3d8e056ce (patch) | |
| tree | b2908f515505401f6bada294ce7a2ca23797c5d5 /bfd/ecoff.c | |
| parent | 608ce2f3c8b1fb309f50b6426389282ec6031323 (diff) | |
| download | gdb-1036838a771b96ad9428e8fc7ecc45d3d8e056ce.zip gdb-1036838a771b96ad9428e8fc7ecc45d3d8e056ce.tar.gz gdb-1036838a771b96ad9428e8fc7ecc45d3d8e056ce.tar.bz2 | |
Fixes a few more memory access violations exposed by fuzzed binaries.
PR binutils/17512
* ecoff.c (_bfd_ecoff_slurp_symbol_table): Warn about and correct
a discrepancy between the isymMax and ifdMax values in the
symbolic header.
* elf.c (_bfd_elf_print_private_bfd_data): Fix the range check
scanning the external dynamic entries.
Diffstat (limited to 'bfd/ecoff.c')
| -rw-r--r-- | bfd/ecoff.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/bfd/ecoff.c b/bfd/ecoff.c index 33e2134..70783b1 100644 --- a/bfd/ecoff.c +++ b/bfd/ecoff.c @@ -905,6 +905,7 @@ _bfd_ecoff_slurp_symbol_table (bfd *abfd) &internal_ptr->symbol, 1, internal_esym.weakext)) return FALSE; + /* The alpha uses a negative ifd field for section symbols. */ if (internal_esym.ifd >= 0) internal_ptr->fdr = (ecoff_data (abfd)->debug_info.fdr @@ -946,6 +947,20 @@ _bfd_ecoff_slurp_symbol_table (bfd *abfd) } } + /* PR 17512: file: 3372-3080-0.004. + A discrepancy between ecoff_data (abfd)->debug_info.symbolic_header.isymMax + and ecoff_data (abfd)->debug_info.symbolic_header.ifdMax can mean that + we have fewer symbols than we were expecting. Allow for this by updating + the symbol count and warning the user. */ + if (internal_ptr - internal < bfd_get_symcount (abfd)) + { + bfd_get_symcount (abfd) = internal_ptr - internal; + (*_bfd_error_handler) + (_("%B: warning: isymMax (%ld) is greater than ifdMax (%d)\n"), + abfd, ecoff_data (abfd)->debug_info.symbolic_header.isymMax, + ecoff_data (abfd)->debug_info.symbolic_header.ifdMax); + } + ecoff_data (abfd)->canonical_symbols = internal; return TRUE; |