This is a note to let you know that I've just added the patch titled mm/memblock.c: reversed logic in memblock_discard() to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: mm-memblock.c-reversed-logic-in-memblock_discard.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From 91b540f98872a206ea1c49e4aa6ea8eed0886644 Mon Sep 17 00:00:00 2001 From: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx> Date: Fri, 25 Aug 2017 15:55:46 -0700 Subject: mm/memblock.c: reversed logic in memblock_discard() From: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx> commit 91b540f98872a206ea1c49e4aa6ea8eed0886644 upstream. In recently introduced memblock_discard() there is a reversed logic bug. Memory is freed of static array instead of dynamically allocated one. Link: http://lkml.kernel.org/r/1503511441-95478-2-git-send-email-pasha.tatashin@xxxxxxxxxx Fixes: 3010f876500f ("mm: discard memblock data later") Signed-off-by: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx> Reported-by: Woody Suwalski <terraluna977@xxxxxxxxx> Tested-by: Woody Suwalski <terraluna977@xxxxxxxxx> Acked-by: Michal Hocko <mhocko@xxxxxxxx> Cc: Vlastimil Babka <vbabka@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- mm/memblock.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/memblock.c +++ b/mm/memblock.c @@ -311,7 +311,7 @@ void __init memblock_discard(void) __memblock_free_late(addr, size); } - if (memblock.memory.regions == memblock_memory_init_regions) { + if (memblock.memory.regions != memblock_memory_init_regions) { addr = __pa(memblock.memory.regions); size = PAGE_ALIGN(sizeof(struct memblock_region) * memblock.memory.max); Patches currently in stable-queue which might be from pasha.tatashin@xxxxxxxxxx are queue-4.9/mm-memblock.c-reversed-logic-in-memblock_discard.patch