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but we still consider it a violation of this rule for practicality, although to be anal, it is instead a violation of ARR30-C. Ubuntu won't accept my choice of password, Passing negative parameters to a wolframscript, Folder's list view has different sized fonts in different folders, Image of minimal degree representation of quasisimple group unique up to conjugacy. CVE-2023-1587 : Avast and AVG Antivirus for Windows were susceptible to For users who wish to see all available information for the CWE/CAPEC entry. The different Modes of Introduction provide information about how and when this weakness may be introduced. I believe that dereferencing NULL should not crash the system, should not allow a write to a NULL pointer area, but should always set errno, If I am a hacker, could I trap a null failure that would force a memory dump. In 5e D&D and Grim Hollow, how does the Specter transformation affect a human PC in regards to the 'undead' characteristics and spells? Configure coverity to check that a declared variable is initialized before usage as a pointer. This Android application has registered to handle a URL when sent an intent: The application assumes the URL will always be included in the intent. Furthermore, the C++20 draft (N4860) s7.6.2.1p1 says: The unary * operator performs indirection: the expression to which it is applied shall be a pointer to an object type, or a pointer to a function type and the result is an lvalue referring to the object or function to which the expression points. It could cause e-mails stored with incorrect names. return p == NULL || (char *)p < &_etext; This example takes an IP address from a user, verifies that it is well formed and then looks up the hostname and copies it into a buffer. In Coverity, FORWARD_NULL reports defects when there are enough evidences to be sure the null access will (can) happen. When length is zero, it is probably unusable condition for this function. Would you like to help any further according to different understanding and expectations for affected implementation details. If you put the code above in a c file, run the analysis, does it report the warning? second, a de-reference of that variable. This code also violates ERR33-C. Detect and handle standard library errors. FORWARD_NULL. Unexpected behavior can be pain to hunt down when one of these is involved. Making statements based on opinion; back them up with references or personal experience. Not the answer you're looking for? Pittsburgh, PA 15213-2612 EXP34-C is a common consequence of ignoring function return values, but it is a distinct error, and can occur in other scenarios too. At this point we define size as strlen(input_str) + 1. c++ - Coverity -- Explicit null dereference - Stack Overflow ), Does not guess that return values from malloc(), strchr(), etc., can be NULL (The return value from malloc() is NULL only if there is OOMo and the dev might not care to handle that. Assign an array of Swift strings to a C structure variable taking a char ** value. In addition, relationships such as PeerOf and CanAlsoBe are defined to show similar weaknesses that the user may want to explore. Avast and AVG Antivirus for Windows were susceptible to a NULL pointer dereference issue via RPC-interface.