Pavel Kozlov 4fd9df10cb ARC: mm: fix leakage of memory allocated for PTE ... Since commit d9820ff ("ARC: mm: switch pgtable_t back to struct page *") a memory leakage problem occurs. Memory allocated for page table entries not released during process termination. This issue can be reproduced by a small program that allocates a large amount of memory. After several runs, you'll see that the amount of free memory has reduced and will continue to reduce after each run. All ARC CPUs are effected by this issue. The issue was introduced since the kernel stable release v5.15-rc1. As described in commit d9820ff after switch pgtable_t back to struct page *, a pointer to "struct page" and appropriate functions are used to allocate and free a memory page for PTEs, but the pmd_pgtable macro hasn't changed and returns the direct virtual address from the PMD (PGD) entry. Than this address used as a parameter in the __pte_free() and as a result this function couldn't release memory page allocated for PTEs. Fix this issue by changing the pmd_pgtable macro and returning pointer to struct page. Fixes: d9820ff76f ("ARC: mm: switch pgtable_t back to struct page *") Cc: Mike Rapoport <rppt@kernel.org> Cc: <stable@vger.kernel.org> # 5.15.x Signed-off-by: Pavel Kozlov <pavel.kozlov@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@kernel.org>		2022-10-17 16:32:12 -07:00
..
boot	arc: dts: Harmonize EHCI/OHCI DT nodes name	2022-10-17 16:32:12 -07:00
configs	arc: update config files	2022-10-17 16:32:12 -07:00
include	ARC: mm: fix leakage of memory allocated for PTE	2022-10-17 16:32:12 -07:00
kernel	ARC: Fix comment typo	2022-10-17 16:32:11 -07:00
lib
mm	arc: iounmap() arg is volatile	2022-10-17 16:32:12 -07:00
plat-axs10x	arc: Replace lkml.org links with lore	2021-12-28 19:48:49 -08:00
plat-hsdk	arc: Replace lkml.org links with lore	2021-12-28 19:48:49 -08:00
plat-sim
plat-tb10x
Kbuild
Kconfig	arch: mm: rename FORCE_MAX_ZONEORDER to ARCH_FORCE_MAX_ORDER	2022-09-11 20:25:56 -07:00
Kconfig.debug
Makefile	kbuild: remove head-y syntax	2022-10-02 18:06:03 +09:00