| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.9 42/84] mm/memblock.c: reversed logic in memblock_discard() | Date | Mon, 28 Aug 2017 10:05:07 +0200 |
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4.9-stable review patch. If anyone has any objections, please let me know.
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From: Pavel Tatashin <pasha.tatashin@oracle.com>
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@oracle.com Fixes: 3010f876500f ("mm: discard memblock data later") Signed-off-by: Pavel Tatashin <pasha.tatashin@oracle.com> Reported-by: Woody Suwalski <terraluna977@gmail.com> Tested-by: Woody Suwalski <terraluna977@gmail.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- 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);
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