From: Anshuman Khandual Date: Wed, 3 May 2017 21:55:00 +0000 (-0700) Subject: mm/mmap: replace SHM_HUGE_MASK with MAP_HUGE_MASK inside mmap_pgoff X-Git-Tag: v4.14-rc1~1003^2~35 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=20ac28933c49433e0f064314de3618129b54a22e;p=platform%2Fkernel%2Flinux-rpi.git mm/mmap: replace SHM_HUGE_MASK with MAP_HUGE_MASK inside mmap_pgoff Commit 091d0d55b286 ("shm: fix null pointer deref when userspace specifies invalid hugepage size") had replaced MAP_HUGE_MASK with SHM_HUGE_MASK. Though both of them contain the same numeric value of 0x3f, MAP_HUGE_MASK flag sounds more appropriate than the other one in the context. Hence change it back. Link: http://lkml.kernel.org/r/20170404045635.616-1-khandual@linux.vnet.ibm.com Signed-off-by: Anshuman Khandual Reviewed-by: Matthew Wilcox Acked-by: Balbir Singh Acked-by: Michal Hocko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/mm/mmap.c b/mm/mmap.c index bfbe885..f82741e 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -1479,7 +1479,7 @@ SYSCALL_DEFINE6(mmap_pgoff, unsigned long, addr, unsigned long, len, struct user_struct *user = NULL; struct hstate *hs; - hs = hstate_sizelog((flags >> MAP_HUGE_SHIFT) & SHM_HUGE_MASK); + hs = hstate_sizelog((flags >> MAP_HUGE_SHIFT) & MAP_HUGE_MASK); if (!hs) return -EINVAL;