Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: mm/damon/dbgfs: fix 'struct pid' leaks in 'dbgfs_target_ids_write()' DAMON debugfs interface increases the reference counts of 'struct pid's for targets from the 'target_ids' file write callback ('dbgfs_target_ids_write()'), but decreases the counts only in DAMON monitoring termination callback ('dbgfs_before_terminate()'). Therefore, when 'target_ids' file is repeatedly written without DAMON monitoring start/termination, the reference count is not decreased and therefore memory for the 'struct pid' cannot be freed. This commit fixes this issue by decreasing the reference counts when 'target_ids' is written.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4bc05954d0076655cfaf6f0135585bdc20cd6b11 before ffe4a1ba1a82c416a6b3a09d46594f6a885ae141; affected 4bc05954d0076655cfaf6f0135585bdc20cd6b11 before ebb3f994dd92f8fb4d70c7541091216c1e10cb71 |
| Linux / Linux | affected 5.15; unaffected 0 before 5.15; unaffected 5.15.13 through 5.15.*; unaffected 5.16 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ffe4a1ba1a82c416a6b3a09d46594f6a885ae141
- https://git.kernel.org/stable/c/ebb3f994dd92f8fb4d70c7541091216c1e10cb71
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.