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libiberty: prevent buffer overflow when decoding user input

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libiberty/
	* d-demangle.c (dlang_symbol_backref): Ensure strlen of
	string is less than length computed by dlang_number.
This commit is contained in:
Luís Ferreira 2021-09-23 11:33:47 -04:00 committed by Jeff Law
parent 43358e91bd
commit 5481040197
1 changed files with 1 additions and 1 deletions
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libiberty/d-demangle.c
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@ -381,7 +381,7 @@ dlang_symbol_backref (string *decl, const char *mangled,
/* Must point to a simple identifier. */
backref = dlang_number (backref, &len);
if (backref == NULL)
if (backref == NULL || strlen(backref) < len)
return NULL;
backref = dlang_lname (decl, backref, len);