cluster pos is defined as u32, when calculate corresponding sector it
should be converted to u64 first, otherwise it may overflow.
Signed-off-by: Joseph Qi <joseph...@huawei.com>
---
fs/ocfs2/aops.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index b57f0c7..b36dcad 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -688,7 +688,7 @@ static int ocfs2_direct_IO_zero_extend(struct ocfs2_super
*osb,
if (p_cpos && !(ext_flags & OCFS2_EXT_UNWRITTEN)) {
u64 s = i_size_read(inode);
- sector_t sector = (p_cpos << (osb->s_clustersize_bits - 9)) +
+ sector_t sector = ((u64)p_cpos << (osb->s_clustersize_bits -
9)) +
(do_div(s, osb->s_clustersize) >> 9);
ret = blkdev_issue_zeroout(osb->sb->s_bdev, sector,
@@ -916,7 +916,7 @@ static ssize_t ocfs2_direct_IO_write(struct kiocb *iocb,
BUG_ON(!p_cpos || (ext_flags & OCFS2_EXT_UNWRITTEN));
ret = blkdev_issue_zeroout(osb->sb->s_bdev,
- p_cpos << (osb->s_clustersize_bits - 9),
+ (u64)p_cpos << (osb->s_clustersize_bits - 9),
zero_len_head >> 9, GFP_NOFS, false);
if (ret < 0)
mlog_errno(ret);
--
1.8.4.3
_______________________________________________
Ocfs2-devel mailing list
Ocfs2-devel@oss.oracle.com
https://oss.oracle.com/mailman/listinfo/ocfs2-devel
