[libsmi] Null pointer dereference in parser-smi.y

11 Apr 2015


      Hi
I've been trying to build libsmi trunk for 
x86_64-w64-mingw32 and I've encountered a problem. I don't 
know whether the MIB I'm trying to load has some invalidity, 
though it's a CISCO MIB and smilint accepts it. Presumably I 
have done something wrong elsewhere and will look into that 
separately.
Regardless, the particular segfault I received led me to 
this code (lib/parser-smi.y:2420), which seems strange:
if (!($11))
                     smiPrintError(thisParserPtr, ERR_INTERNAL);
                 /*
                  * Otherwise, we have to allocate a
                  * new Type struct, inherited from $10.
                  */
                 $$ = duplicateType($11, 0, thisParserPtr);
duplicateType (lib/smi-data.c:2404) unconditionally 
dereferences its first parameter so, since $11 is invalid in 
this block, the call to duplicateType is broken.
What is this code supposed to be instead?
Best regards
Tom

[libsmi] Null pointer dereference in parser-smi.y

Tomalak Geret'kal