cve-2021-46937
Vulnerability from cvelistv5
Published
2024-02-27 09:44
Modified
2024-12-19 07:32
Severity ?
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ebb3f994dd92f8fb4d70c7541091216c1e10cb71Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ffe4a1ba1a82c416a6b3a09d46594f6a885ae141Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ebb3f994dd92f8fb4d70c7541091216c1e10cb71Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ffe4a1ba1a82c416a6b3a09d46594f6a885ae141Patch
Impacted products
Vendor Product Version
Linux Linux Version: 5.15
Show details on NVD website

To clipboard 

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