diff options
| author | Becky Bruce <beckyb@kernel.crashing.org> | 2011-07-26 02:11:49 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-07-26 05:57:07 +0200 |
| commit | 2b37c35e6552b0d04d5db9728bc7af22d53f731a (patch) | |
| tree | 5ccccfe90e6bfb472e6000fd4f55c9be66eb795c /fs/hugetlbfs | |
| parent | ipc/sem.c: fix race with concurrent semtimedop() timeouts and IPC_RMID (diff) | |
| download | linux-2b37c35e6552b0d04d5db9728bc7af22d53f731a.tar.xz linux-2b37c35e6552b0d04d5db9728bc7af22d53f731a.zip | |
fs/hugetlbfs/inode.c: fix pgoff alignment checking on 32-bit
This:
vma->vm_pgoff & ~(huge_page_mask(h) >> PAGE_SHIFT)
is incorrect on 32-bit. It causes us to & the pgoff with something that
looks like this (for a 4m hugepage): 0xfff003ff. The mask should be
flipped and *then* shifted, to give you 0x0000_03fff.
Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/hugetlbfs')
| -rw-r--r-- | fs/hugetlbfs/inode.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 7aafeb8fa300..537a2093c0e1 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -94,7 +94,7 @@ static int hugetlbfs_file_mmap(struct file *file, struct vm_area_struct *vma) vma->vm_flags |= VM_HUGETLB | VM_RESERVED; vma->vm_ops = &hugetlb_vm_ops; - if (vma->vm_pgoff & ~(huge_page_mask(h) >> PAGE_SHIFT)) + if (vma->vm_pgoff & (~huge_page_mask(h) >> PAGE_SHIFT)) return -EINVAL; vma_len = (loff_t)(vma->vm_end - vma->vm_start); |