LKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH] dm: fix dax_dev NULL dereference @ 2019-07-30 11:37 Pankaj Gupta 2019-07-30 11:38 ` Pankaj Gupta 0 siblings, 1 reply; 7+ messages in thread From: Pankaj Gupta @ 2019-07-30 11:37 UTC (permalink / raw) To: snitzer, dan.j.williams Cc: dm-devel, linux-nvdimm, linux-fsdevel, linux-kernel, agk, pagupta 'Murphy Zhou' reports . <. (Or use the ternary operator if you prefer). View - a subset of CWE entries that provides a way of examining CWE content. Did the call to malloc() fail because req_size was too large or because there were too many requests being handled at the same time? Apple. Does a barbarian benefit from the fast movement ability while wearing medium armor? A check-after-dereference error occurs when a program dereferences a pointer that can be, [1] Standards Mapping - Common Weakness Enumeration, [2] Standards Mapping - Common Weakness Enumeration Top 25 2019, [3] Standards Mapping - Common Weakness Enumeration Top 25 2020, [4] Standards Mapping - Common Weakness Enumeration Top 25 2021, [5] Standards Mapping - Common Weakness Enumeration Top 25 2022, [6] Standards Mapping - DISA Control Correlation Identifier Version 2, [7] Standards Mapping - General Data Protection Regulation (GDPR), [8] Standards Mapping - Motor Industry Software Reliability Association (MISRA) C Guidelines 2012, [9] Standards Mapping - NIST Special Publication 800-53 Revision 4, [10] Standards Mapping - NIST Special Publication 800-53 Revision 5, [11] Standards Mapping - OWASP Top 10 2004, [12] Standards Mapping - OWASP Application Security Verification Standard 4.0, [13] Standards Mapping - Payment Card Industry Data Security Standard Version 1.1, [14] Standards Mapping - Payment Card Industry Data Security Standard Version 3.0, [15] Standards Mapping - Payment Card Industry Data Security Standard Version 3.1, [16] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2, [17] Standards Mapping - Payment Card Industry Data Security Standard Version 3.2.1, [18] Standards Mapping - Payment Card Industry Software Security Framework 1.0, [19] Standards Mapping - Payment Card Industry Software Security Framework 1.1, [20] Standards Mapping - Security Technical Implementation Guide Version 3.1, [21] Standards Mapping - Security Technical Implementation Guide Version 3.4, [22] Standards Mapping - Security Technical Implementation Guide Version 3.5, [23] Standards Mapping - Security Technical Implementation Guide Version 3.6, [24] Standards Mapping - Security Technical Implementation Guide Version 3.7, [25] Standards Mapping - Security Technical Implementation Guide Version 3.9, [26] Standards Mapping - Security Technical Implementation Guide Version 3.10, [27] Standards Mapping - Security Technical Implementation Guide Version 4.1, [28] Standards Mapping - Security Technical Implementation Guide Version 4.2, [29] Standards Mapping - Security Technical Implementation Guide Version 4.3, [30] Standards Mapping - Security Technical Implementation Guide Version 4.4, [31] Standards Mapping - Security Technical Implementation Guide Version 4.5, [32] Standards Mapping - Security Technical Implementation Guide Version 4.6, [33] Standards Mapping - Security Technical Implementation Guide Version 4.7, [34] Standards Mapping - Security Technical Implementation Guide Version 4.8, [35] Standards Mapping - Security Technical Implementation Guide Version 4.9, [36] Standards Mapping - Security Technical Implementation Guide Version 4.10, [37] Standards Mapping - Security Technical Implementation Guide Version 4.11, [38] Standards Mapping - Security Technical Implementation Guide Version 5.1, [39] Standards Mapping - Web Application Security Consortium 24 + 2, [40] Standards Mapping - Web Application Security Consortium Version 2.00. The most common forms of API abuse are caused by the caller failing to honor its end of this contract. Chapter 20, "Checking Returns" Page 624. Palash Sachan 8-Feb-17 13:41pm. Null dereference is a common type of runtime failure in Java programs, and it is necessary to verify whether a dereference in the program is safe. Cross-Site Flashing. Not the answer you're looking for? is incorrect. It is impossible for the program to perform a graceful exit if required. If you can guaranty this, then the empty List is even better, as it does not create a new object all the time. More specific than a Pillar Weakness, but more general than a Base Weakness. JS Strong proficiency with Rest API design implementation experience. Thanks for contributing an answer to Stack Overflow! Synopsys-sigcoverity-common-api A challenge mostly of GitHub. Many modern techniques use data flow analysis to minimize the number of false positives. (Java) and to compare it with existing bug reports on the tool to test its efficacy. Abstract. The program can potentially dereference a null-pointer, thereby raising a NullPointerException. String os = System.getProperty ("os.name"); if (os.equalsIgnoreCase ("Windows 95") ) System.out.println ("Not supported"); Note that this code is also vulnerable to a buffer overflow . Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') -Wnull-dereference. Furthermore, if the end of the file is reached before any characters are read, fgets() returns without writing anything to buf. If there is a more properplace to file these types of bugs feel free to share and I'll proceed to file the bug there. Bny Mellon Layoffs 2021, I think I know why I'm getting it , just wanted to know what would be the best way to fix the issue. My code is GPL licensed, can I issue a license to have my code be distributed in a specific MIT licensed project? CWE-476: NULL Pointer Dereference: A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. : Fortify: The method processMessage() in VET360InboundProcessService.java can crash the program by dereferencing a null pointer on line 197. Identify error conditions that are not likely to occur during normal usage and trigger them. When designing a function, make sure you return a value or throw an exception in case of an error. Copyright 2023 Open Text Corporation. void host_lookup(char *user_supplied_addr){, if("com.example.URLHandler.openURL".equals(intent.getAction())) {. Software Security | Null Dereference - Micro Focus How can I find out which sectors are used by files on NTFS? Follows a very simple code sample that should reproduce the issue: In this simple excerpt Fortify complains that "typedObj" can be null in the return statement. PS: Yes, Fortify should know that these properties are secure. Take the following code: Integer num; num = new Integer(10); of Computer Science University of Maryland College Park, MD ayewah@cs.umd.edu William Pugh Dept. ImmuniWeb. By using this site, you accept the Terms of Use and Rules of Participation. The different Modes of Introduction provide information about how and when this weakness may be introduced. 10 Avoiding Attempt to Dereference Null Object Errors - YouTube In the following example, it is possible to request that memcpy move a much larger segment of memory than assumed: If returnChunkSize() happens to encounter an error it will return -1. Explanation Null-pointer errors are usually the result of one or more programmer assumptions being violated. <, [REF-1033] "NULL Pointer Dereference [CWE-476]". corrected in a simple way. An unexpected return value could place the system in a state that could lead to a crash or other unintended behaviors. Does a summoned creature play immediately after being summoned by a ready action? I'd prefer to get rid of the finding vs. just write it off. If an attacker can force the function to fail or otherwise return a value that is not expected, then the subsequent program logic could lead to a vulnerability, because the product is not in a state that the programmer assumes. Base - a weakness [REF-62] Mark Dowd, John McDonald But, when you try to declare a reference type, something different happens. More specific than a Pillar Weakness, but more general than a Base Weakness. If all pointers that could have been modified are sanity-checked previous to use, nearly all NULL pointer dereferences can be prevented. Java Language Tutorial => Dereferencing The following code shows a system property that is set to null and later dereferenced by a programmer who mistakenly assumes it will always be defined. OWASP, the OWASP logo, and Global AppSec are registered trademarks and AppSec Days, AppSec California, AppSec Cali, SnowFROC, and LASCON are trademarks of the OWASP Foundation, Inc. Disadvantages Of Group Learning, Only iterating over the list would be fine. Unchecked return value leads to resultant integer overflow and code execution. While there This table specifies different individual consequences associated with the weakness. CiteSeerX - Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Many analysis techniques have been proposed to determine when a potentially null value may be dereferenced. Variant - a weakness a NULL pointer dereference would then occur in the call to strcpy(). The program can potentially dereference a null-pointer, thereby raising a NullException. In order to avoid data races, correctly written programs must check the result of thread synchronization functions and appropriately handle all errors, either by attempting to recover from them or reporting them to higher levels. Why are trials on "Law & Order" in the New York Supreme Court? citrus county livestock regulations; how many points did klay thompson score last night. how to fix null dereference in java fortify The program can potentially dereference a null-pointer, thereby raising a NullPointerException. Is Java "pass-by-reference" or "pass-by-value"? large number of packets leads to NULL dereference, packet with invalid error status value triggers NULL dereference, Chain: race condition for an argument value, possibly resulting in NULL dereference. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Team Collaboration and Endpoint Management. Null-pointer dereferences, while common, can generally be found and This listing shows possible areas for which the given weakness could appear. For example, if a program fails to call chdir() after calling chroot(), it violates the contract that specifies how to change the active root directory in a secure fashion. Fortify Null Dereference in Java - Stack Overflow ASCSM-CWE-252-resource. Take the following code: Integer num; num = new Integer(10); So you have a couple of choices: Ignore the warning. Making statements based on opinion; back them up with references or personal experience. java"HP Fortify v3.50""Null Dereference"Fortifynull. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy.