diff options
| author | Yue Hu <huyue2@yulong.com> | 2019-05-13 17:18:14 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-06-22 08:17:12 +0200 |
| commit | 8f759452ba7c8876d20f1bc4c3687f32bb1488f3 (patch) | |
| tree | 9dfda42f59e2383807167db2fec79eb0e97a0c44 /mm | |
| parent | 121100e4798f7760747283259610829c2206ebd1 (diff) | |
mm/cma.c: fix crash on CMA allocation if bitmap allocation fails
[ Upstream commit 1df3a339074e31db95c4790ea9236874b13ccd87 ]
f022d8cb7ec7 ("mm: cma: Don't crash on allocation if CMA area can't be
activated") fixes the crash issue when activation fails via setting
cma->count as 0, same logic exists if bitmap allocation fails.
Link: http://lkml.kernel.org/r/20190325081309.6004-1-zbestahu@gmail.com
Signed-off-by: Yue Hu <huyue2@yulong.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Laura Abbott <labbott@redhat.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/cma.c | 4 |
1 files changed, 3 insertions, 1 deletions
@@ -100,8 +100,10 @@ static int __init cma_activate_area(struct cma *cma) cma->bitmap = kzalloc(bitmap_size, GFP_KERNEL); - if (!cma->bitmap) + if (!cma->bitmap) { + cma->count = 0; return -ENOMEM; + } WARN_ON_ONCE(!pfn_valid(pfn)); zone = page_zone(pfn_to_page(pfn)); |