At best, such an exception will cause abrupt program termination. When B is null, The control reaches inside the main if block only when length of A is 1. When and how should I use a ThreadLocal variable? java Null Pointer Small typo nit: "such as if i t pointed to freed memory" meant to say "if it" instead (removing whitespace). To subscribe to this RSS feed, copy and paste this URL into your RSS reader. SONAR, SONARSOURCE, SONARLINT, SONARQUBE and SONARCLOUD are trademarks of SonarSource S.A. All other trademarks and copyrights are the property of their respective owners. In my experience, there are reasons to check for a NULL pointer other than dereferencing it. SONAR, SONARSOURCE, SONARLINT, SONARQUBE and SONARCLOUD are trademarks of SonarSource S.A. All other trademarks and copyrights are the property of their respective owners. Perhaps this could be done with a special constraint that will notify the SE engine that we learned from a Debug.Assert call. We. You do not have permission to delete messages in this group, Either email addresses are anonymous for this group or you need the view member email addresses permission to view the original message. Obviously the value of that pointer could have changed since the . strongSwan - strongSwan Vulnerability (CVE-2023-26463) which version of SonarQube are you using? Which @NotNull Java annotation should I use? Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 3.7. extern char _etext; Styling contours by colour and by line thickness in QGIS. (/). If you write [ref], then a null pointer is not allowed, but if you write [unique], then a null pointer is permitted. At worst, it could expose debugging information that would be useful to an attacker, or In order to fix this, just do the following: If you are absolutely sure that res.getBody() stays null and is also not modified by another thread, you could also use a //NOSONAR comment in order to suppress the warning. res.getBody() == null || res.getBody().getServiceResult() == null). Just because something is a pointer does not mean you should call delete . What is a serialVersionUID and why should I use it? Software Engineering Institute This cross-file approach analysis can be quite resource-consuming, and we are not ready to openly enable the feature. We seem to have a false positive for "Null pointers should not be dereferenced" - squid:S2259. My below code where I'm calling a stored procedure is giving a null pointer exception. See "Clever Attack Exploits Fully-Patched Linux Kernel" [Goodin 2009] for an example of a code execution exploit that resulted from a null pointer dereference. Doing so will cause a NullPointerException to be thrown. LANG.MEM.NPDLANG.STRUCT.NTADLANG.STRUCT.UPD, Null pointer dereferenceNull test after dereferenceUnchecked parameter dereference, Can detect violations of this rule. Shouldn't the function check all pointers before dereferencing them or passing them to another function? Asking for help, clarification, or responding to other answers. In multithreaded programs, null pointer dereferences can violate cache coherency policies and can cause resource leaks. I'd guess null pointers are not valid, even though they point to 0 bytes. Analysis of Haiku Operating System (BeOS Family) by PVS-Studio. Part 1 Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. A bug can cause them never to be reassigned. Thered be huge value in jumping onto the latest version of the ecosystem (notably SonarQube), and benefit from all latest analyzers (e.g.

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