[llvm] [llvm-objdump][ELF] Ensure offset to verdaux entry array does not go past size (PR #115284)

[Antonio Frighetto via llvm-commits]

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@@ -398,6 +401,12 @@ static void printSymbolVersionDefinition(const typename ELFT::Shdr &Shdr,
            << format("0x%08" PRIx32 " ", (uint32_t)Verdef->vd_hash);
 
     const uint8_t *BufAux = Buf + Verdef->vd_aux;
+    if (BufAux > Contents.end()) {
+      reportWarning("out-of-bound while parsing verdaux entries, corrupted "
+                    "verdef section",
+                    Obj.getFileName());
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antoniofrighetto wrote:

I went with 'vd_aux value %val in section verdef points past end of the section, corrupted section,' as I don't think it’s that relevant to provide the exact byte count by which the aux entry went out of bounds. I added 'corrupted section' consistently with the other warnings.

https://github.com/llvm/llvm-project/pull/115284