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| author | Alan Modra <amodra@gmail.com> | 2019-02-19 22:48:44 +1030 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2019-02-19 22:52:55 +1030 |
| commit | 179f2db0d9c397d7dd8a59907b84208b79f7f48c (patch) | |
| tree | d5d6f959e97707dff173090be6f4d1ba43c9fbfe /bfd/pei-x86_64.c | |
| parent | c72e75a64030b0f6535a80481f37968ad55c333a (diff) | |
| download | gdb-179f2db0d9c397d7dd8a59907b84208b79f7f48c.zip gdb-179f2db0d9c397d7dd8a59907b84208b79f7f48c.tar.gz gdb-179f2db0d9c397d7dd8a59907b84208b79f7f48c.tar.bz2 | |
PR24235, Read memory violation in pei-x86_64.c
PR 24235
* pei-x86_64.c (pex64_bfd_print_pdata_section): Correct checks
attempting to prevent read past end of section.
Diffstat (limited to 'bfd/pei-x86_64.c')
| -rw-r--r-- | bfd/pei-x86_64.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/bfd/pei-x86_64.c b/bfd/pei-x86_64.c index ff1093c..7e75104 100644 --- a/bfd/pei-x86_64.c +++ b/bfd/pei-x86_64.c @@ -541,7 +541,7 @@ pex64_bfd_print_pdata_section (bfd *abfd, void *vfile, asection *pdata_section) /* virt_size might be zero for objects. */ if (stop == 0 && strcmp (abfd->xvec->name, "pe-x86-64") == 0) { - stop = (datasize / onaline) * onaline; + stop = datasize; virt_size_is_zero = TRUE; } else if (datasize < stop) @@ -551,8 +551,8 @@ pex64_bfd_print_pdata_section (bfd *abfd, void *vfile, asection *pdata_section) _("Warning: %s section size (%ld) is smaller than virtual size (%ld)\n"), pdata_section->name, (unsigned long) datasize, (unsigned long) stop); - /* Be sure not to read passed datasize. */ - stop = datasize / onaline; + /* Be sure not to read past datasize. */ + stop = datasize; } /* Display functions table. */ @@ -724,8 +724,7 @@ pex64_bfd_print_pdata_section (bfd *abfd, void *vfile, asection *pdata_section) altent += imagebase; if (altent >= pdata_vma - && (altent + PDATA_ROW_SIZE <= pdata_vma - + pei_section_data (abfd, pdata_section)->virt_size)) + && altent - pdata_vma + PDATA_ROW_SIZE <= stop) { pex64_get_runtime_function (abfd, &arf, &pdata[altent - pdata_vma]); |