Description
In the Linux kernel, the following vulnerability has been resolved: mm/ksm: fix race with VMA iteration and mm_struct teardown exit_mmap() will tear down the VMAs and maple tree with the mmap_lock held in write mode. Ensure that the maple tree is still valid by checking ksm_test_exit() after taking the mmap_lock in read mode, but before the for_each_vma() iterator dereferences a destroyed maple tree. Since the maple tree is destroyed, the flags telling lockdep to check an external lock has been cleared. Skip the for_each_vma() iterator to avoid dereferencing a maple tree without the external lock flag, which would create a lockdep warning.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
a5f18ba0727656bd1fe3bcdb0d563f81790f9a04 to < 286b0cab31bac29960e5684f6fb331d42f03b363affecteda5f18ba0727656bd1fe3bcdb0d563f81790f9a04 to < b4f664ffd8f78c05a1fd542a28bc5a11e994c014affecteda5f18ba0727656bd1fe3bcdb0d563f81790f9a04 to < 6db504ce55bdbc575723938fc480713c9183f6a2affected
Linux Linux
Default version status: affected
6.1affected0 to < 6.1unaffected6.1.22 to ≤ 6.1.*unaffected6.2.9 to ≤ 6.2.*unaffected6.3 to ≤ *unaffected