CVE-2024-50202 Information

Nov 09, 2024 cve

Description

In the Linux kernel the following vulnerability has been resolved:

nilfs2: propagate directory read errors from nilfs_find_entry()

Syzbot reported that a task hang occurs in vcs_open() during a fuzzing test for nilfs2.

The root cause of this problem is that in nilfs_find_entry() which searches for directory entries ignores errors when loading a directory page/folio via nilfs_get_folio() fails.

If the filesystem images is corrupted and the i_size of the directory inode is large and the directory page/folio is successfully read but fails the sanity check for example when it is zero-filled nilfs_check_folio() may continue to spit out error messages in bursts.

Fix this issue by propagating the error to the callers when loading a page/folio fails in nilfs_find_entry().

The current interface of nilfs_find_entry() and its callers is outdated and cannot propagate error codes such as -EIO and -ENOMEM returned via nilfs_find_entry() so fix it together.

Reference

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