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authorLecopzer Chen <lecopzer.chen@mediatek.com>2019-09-23 15:36:24 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-24 15:54:09 -0700
commitdb57e98d87908b8837352abe08515e42752270c1 (patch)
tree7071d2bd033dd5f3dd8a61554141faef96e79994 /mm/sparse.c
parentae83189405ea5c693683327fa69ac95a23ec59be (diff)
mm/sparse.c: fix ALIGN() without power of 2 in sparse_buffer_alloc()
The size argument passed into sparse_buffer_alloc() has already been aligned with PAGE_SIZE or PMD_SIZE. If the size after aligned is not power of 2 (e.g. 0x480000), the PTR_ALIGN() will return wrong value. Use roundup to round sparsemap_buf up to next multiple of size. Link: http://lkml.kernel.org/r/20190705114826.28586-1-lecopzer.chen@mediatek.com Signed-off-by: Lecopzer Chen <lecopzer.chen@mediatek.com> Signed-off-by: Mark-PK Tsai <Mark-PK.Tsai@mediatek.com> Cc: YJ Chiang <yj.chiang@mediatek.com> Cc: Lecopzer Chen <lecopzer.chen@mediatek.com> Cc: Pavel Tatashin <pasha.tatashin@oracle.com> Cc: Oscar Salvador <osalvador@suse.de> Cc: Michal Hocko <mhocko@suse.com> Cc: Mike Rapoport <rppt@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/sparse.c')
-rw-r--r--mm/sparse.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/sparse.c b/mm/sparse.c
index 2bfd078301f8..79355a86064f 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -501,7 +501,7 @@ void * __meminit sparse_buffer_alloc(unsigned long size)
void *ptr = NULL;
if (sparsemap_buf) {
- ptr = PTR_ALIGN(sparsemap_buf, size);
+ ptr = (void *) roundup((unsigned long)sparsemap_buf, size);
if (ptr + size > sparsemap_buf_end)
ptr = NULL;
else {