Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: cachefiles: fix incorrect dentry refcount in cachefiles_cull() The patch mentioned below changed cachefiles_bury_object() to expect 2 references to the 'rep' dentry. Three of the callers were changed to use start_removing_dentry() which takes an extra reference so in those cases the call gets the expected references. However there is another call to cachefiles_bury_object() in cachefiles_cull() which did not need to be changed to use start_removing_dentry() and so was not properly considered. It still passed the dentry with just one reference so the net result is that a reference is lost. To meet the expectations of cachefiles_bury_object(), cachefiles_cull() must take an extra reference before the call. It will be dropped by cachefiles_bury_object().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 7bb1eb45e43c4730cbc5a48b9e9295049fccdacb before 6577df7dc7a7de128442b6192c7a32195c923480; affected 7bb1eb45e43c4730cbc5a48b9e9295049fccdacb before 1635c2acdde86c4f555b627aec873c8677c421ed |
| Linux / Linux | affected 6.19; unaffected 0 before 6.19; unaffected 6.19.14 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.