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[4/7] ocfs2: Promote to unsigned long long before shifting

Message ID 20201004180428.14494-5-willy@infradead.org
State New, archived
Headers show
Series Fix a pile of 4GB file problems on 32-bit | expand

Commit Message

Matthew Wilcox Oct. 4, 2020, 6:04 p.m. UTC
On 32-bit systems, this shift will overflow for files larger than 4GB.

Cc: stable@vger.kernel.org
Fixes: 35edec1d52c0 ("ocfs2: update truncate handling of partial clusters")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
---
 fs/ocfs2/alloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 4c1b90442d6f..26eff79ecb50 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -6867,7 +6867,7 @@  static void ocfs2_zero_cluster_pages(struct inode *inode, loff_t start,
 		ocfs2_map_and_dirty_page(inode, handle, from, to, page, 1,
 					 &phys);
 
-		start = (page->index + 1) << PAGE_SHIFT;
+		start = (page->index + 1ULL) << PAGE_SHIFT;
 	}
 out:
 	if (pages)