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asan: readelf: wild read in get_num_dynamic_syms

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* readelf.c (get_num_dynamic_syms): Bounds check mipsxlat array
	access.
This commit is contained in:
Alan Modra
2020-05-21 09:48:35 +09:30
parent 1484644d35
commit c31ab5a001
2 changed files with 7 additions and 1 deletions
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3
binutils/readelf.c
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@@ -10211,7 +10211,8 @@ get_num_dynamic_syms (Filedata * filedata)
{
if (filedata->dynamic_info_DT_MIPS_XHASH)
{
if (filedata->mipsxlat[off] >= num_of_syms)
if (off < filedata->ngnuchains
&& filedata->mipsxlat[off] >= num_of_syms)
num_of_syms = filedata->mipsxlat[off] + 1;
}
else