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authorChristoph Hellwig <hch@lst.de>2019-07-01 23:54:31 +0200
committerAndreas Gruenbacher <agruenba@redhat.com>2019-07-03 08:53:01 +0200
commitf3915f83e84c1f14358aaa91e8785d6169092176 (patch)
tree00ea8c4b154989fdaade319614f584b17f1bb8d0 /fs/gfs2
parentf29e62eed261f01431d348d8b22a6f275d553a51 (diff)
gfs2: use page_offset in gfs2_page_mkwrite
Without casting page->index to a guaranteed 64-bit type, the value might be treated as 32-bit on 32-bit platforms and thus get truncated. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r--fs/gfs2/file.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 28bdbeb11030..5d61113b3f50 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -408,7 +408,7 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
struct gfs2_sbd *sdp = GFS2_SB(inode);
struct gfs2_alloc_parms ap = { .aflags = 0, };
unsigned long last_index;
- u64 pos = page->index << PAGE_SHIFT;
+ u64 pos = page_offset(page);
unsigned int data_blocks, ind_blocks, rblocks;
struct gfs2_holder gh;
loff_t size;