Linux nilfs2 fix error propagation in nilfs_find_entry to prevent error spam

From this webpage screenshot, we can extract the following key information about the vulnerability: 1. Vulnerability Description: - Issue Description: In nilfs2, during directory entry lookup, when fails, the error is ignored and the lookup continues. This can cause to output error messages repeatedly in a short period when the filesystem is corrupted or when directory entries are large. - Fix: Propagate the error from to its caller. When page/directory entry loading fails, this prevents repeated error messages. 2. Code Changes: - nilfs2/dir.c: Modified to return an error pointer when page/directory entry loading fails, allowing the caller to ignore the error. - nilfs2/namei.c: Modified to return an error pointer when page/directory entry loading fails, allowing the caller to ignore the error. - nilfs2/nifs.h: Updated the return type of to return an error pointer. 3. Fix Scope: - Files: nilfs2/dir.c, nilfs2/namei.c, nilfs2/nifs.h - Lines of Code: A total of 54 lines modified, including 37 lines deleted and 17 lines added. 4. Fix Background: - Origin of Issue: Sybott reported a task hang issue occurring in the function, which happened during directory entry lookup in . - Reason for Fix: The function ignored errors when loading directory entry pages/entries, leading to generating repeated error messages in a short time when the filesystem is corrupted or directory entries are large. 5. Fix Process: - Issue Identification: Identified through Sybott’s report and testing. - Root Cause Analysis: The fundamental cause was that ignored errors during page/directory entry loading. - Fix Implementation: Modified to propagate errors to its caller, returning an error pointer when loading fails, so the caller can handle or ignore the error appropriately. This information provides a clear understanding of the vulnerability’s context, fix measures, and scope, which is highly valuable for comprehending the nature and resolution process of the issue.

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Linux nilfs2 fix error propagation in nilfs_find_entry to prevent error spam