f2fs: fix to avoid overflow while left shift operation

[ Upstream commit 0fe1c6bec54ea68ed8c987b3890f2296364e77bb ]

Should cast type of folio->index from pgoff_t to loff_t to avoid overflow
while left shift operation.

Fixes: 3265d3db1f16 ("f2fs: support partial truncation on compressed inode")
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
[ Modification: Using rpages[i]->index instead of folio->index due to
it was changed since commit:1cda5bc0b2fe ("f2fs: Use a folio in
f2fs_truncate_partial_cluster()") on 6.14 ]
Signed-off-by: Rajani Kantha <681739313@139.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/fs/f2fs/compress.c b/fs/f2fs/compress.c
index b05bb7bfa14c5ddfbf7c26160c618414db544297..fcd21bb060cd42530644cc4da674e309dde467d9 100644 (file)
--- a/fs/f2fs/compress.c
+++ b/fs/f2fs/compress.c
@@ -1236,7 +1236,7 @@ int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock)
                int i;
 
                for (i = cluster_size - 1; i >= 0; i--) {
-                       loff_t start = rpages[i]->index << PAGE_SHIFT;
+                       loff_t start = (loff_t)rpages[i]->index << PAGE_SHIFT;
 
                        if (from <= start) {
                                zero_user_segment(rpages[i], 0, PAGE_SIZE);