Ard Biesheuvel b9bc36704c ARM, xtensa: highmem: avoid clobbering non-page aligned memory reservations ... free_highpages() iterates over the free memblock regions in high memory, and marks each page as available for the memory management system. Until commit cddb5ddf2b ("arm, xtensa: simplify initialization of high memory pages") it rounded beginning of each region upwards and end of each region downwards. However, after that commit free_highmem() rounds the beginning and end of each region downwards, and we may end up freeing a page that is memblock_reserve()d, resulting in memory corruption. Restore the original rounding of the region boundaries to avoid freeing reserved pages. Fixes: cddb5ddf2b ("arm, xtensa: simplify initialization of high memory pages") Link: https://lore.kernel.org/r/20201029110334.4118-1-ardb@kernel.org/ Link: https://lore.kernel.org/r/20201031094345.6984-1-rppt@kernel.org Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Co-developed-by: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Max Filippov <jcmvbkbc@gmail.com>		2020-11-04 10:42:57 +02:00
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boot	Kbuild updates for v5.9	2020-08-09 14:10:26 -07:00
configs	xtensa: reorganize vectors placement	2020-02-04 21:57:02 -08:00
include	xtensa: propagate the calling conventions change down into csum_partial_copy_generic()	2020-08-20 15:45:21 -04:00
kernel	treewide: Convert macro and uses of __section(foo) to __section("foo")	2020-10-25 14:51:49 -07:00
lib	xtensa: propagate the calling conventions change down into csum_partial_copy_generic()	2020-08-20 15:45:21 -04:00
mm	ARM, xtensa: highmem: avoid clobbering non-page aligned memory reservations	2020-11-04 10:42:57 +02:00
oprofile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
platforms	xtensa/simdisk: remove the call to check_disk_change	2020-07-08 16:20:01 -06:00
variants	xtensa: add test_kc705_be variant	2018-08-20 12:34:45 -07:00
Kconfig	Merge branch 'work.set_fs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2020-10-22 09:59:21 -07:00
Kconfig.debug	xtensa: make stack dump size configurable	2019-11-26 11:33:39 -08:00
Makefile	xtensa: add XIP kernel support	2019-11-26 11:33:38 -08:00