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8331320: ClassFile API OutOfMemoryError with certain class files

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Reviewed-by: psandoz
This commit is contained in:
Adam Sotona 2024-05-02 18:07:42 +00:00
parent 6f98d8f58f
commit e2c0cfef14
2 changed files with 60 additions and 1 deletions
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6
src/java.base/share/classes/jdk/internal/classfile/impl/AbstractInstruction.java
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@ -262,6 +262,9 @@ public abstract sealed class AbstractInstruction
this.afterPad = pos + 1 + ((4 - ((pos + 1 - code.codeStart) & 3)) & 3);
this.npairs = code.classReader.readInt(afterPad + 4);
if (npairs < 0 || npairs > code.codeLength >> 3) {
throw new IllegalArgumentException("Invalid lookupswitch npairs value: " + npairs);
}
}
static int size(CodeImpl code, int codeStart, int pos) {
@ -314,6 +317,9 @@ public abstract sealed class AbstractInstruction
int pad = ap - (pos + 1);
int low = code.classReader.readInt(ap + 4);
int high = code.classReader.readInt(ap + 8);
if (high < low || high - low > code.codeLength >> 2) {
throw new IllegalArgumentException("Invalid tableswitch values low: " + low + " high: " + high);
}
int cnt = high - low + 1;
return 1 + pad + 12 + cnt * 4;
}