Description
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: pci: Fix memory accounting for pinned/unpinned pages The account_mem() and unaccount_mem() functions call get_uid() which increments the reference count of struct user_struct on every invocation. But we don't decrement the count by calling free_uid(). It also accounted/unaccounted the pages against the current->mm. But its possible the unaccount_mem() can be called from a different process context than the one that originally pinned the pages. Let's fix this by storing the pinning process user_struct and mm_struct when accounting for pinned pages, and subsequently free these resources when the pages are unpinned. [borntraeger@linux.ibm.com: Fixed whitespace]
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
3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to < ad1c2ac7f15b224cf9ab26b593caa9bd1a4be72eaffected3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to < dc7465a364104526c56b922c9de9dfcc08a7d5f7affected3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to < 47cfd75d9df7c8f425b0d769328fe43a8a8e606eaffected3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to < 70871b121f81d08879363cb1238a4c85c5c2800caffected3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to < e3f732e086e438c52c7400bd2734bb166aa4752caffected3c5a1b6f0a18520a0edd0600fef6f1a8553b8fdc to < 36f6999ecde3976731a8bfc0b8e667da6f593069affected
Linux Linux
Default version status: affected
6.0affected0 to < 6.0unaffected6.1.184 to ≤ 6.1.*unaffected6.6.152 to ≤ 6.6.*unaffected6.12.104 to ≤ 6.12.*unaffected6.18.44 to ≤ 6.18.*unaffected7.1.8 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/ad1c2ac7f15b224cf9ab26b593caa9bd1a4be72e ↗
- https://git.kernel.org/stable/c/dc7465a364104526c56b922c9de9dfcc08a7d5f7 ↗
- https://git.kernel.org/stable/c/47cfd75d9df7c8f425b0d769328fe43a8a8e606e ↗
- https://git.kernel.org/stable/c/70871b121f81d08879363cb1238a4c85c5c2800c ↗
- https://git.kernel.org/stable/c/e3f732e086e438c52c7400bd2734bb166aa4752c ↗
- https://git.kernel.org/stable/c/36f6999ecde3976731a8bfc0b8e667da6f593069 ↗