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ocfs2: fix shift left operations overflow 

ocfs2_inode_info->ip_clusters and ocfs2_dinode->id1.bitmap1.i_total are
defined as type u32, so the shift left operations may overflow if volume
size is large, for example, 2TB and cluster size is 1MB.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Alex Chen <alex.chen@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joseph Qi 2014-10-09 15:24:56 -07:00 committed by Linus Torvalds
parent 190a7721ac
commit 7fa05c6e46
2 changed files with 2 additions and 2 deletions
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2
fs/ocfs2/inode.h
View File

@ -162,7 +162,7 @@ static inline blkcnt_t ocfs2_inode_sector_count(struct inode *inode)
{
int c_to_s_bits = OCFS2_SB(inode->i_sb)->s_clustersize_bits - 9;
return (blkcnt_t)(OCFS2_I(inode)->ip_clusters << c_to_s_bits);
return (blkcnt_t)OCFS2_I(inode)->ip_clusters << c_to_s_bits;
}
/* Validate that a bh contains a valid inode */

2
fs/ocfs2/move_extents.c
View File

@ -404,7 +404,7 @@ static int ocfs2_find_victim_alloc_group(struct inode *inode,
* 'vict_blkno' was out of the valid range.
*/
if ((vict_blkno < le64_to_cpu(rec->c_blkno)) ||
(vict_blkno >= (le32_to_cpu(ac_dinode->id1.bitmap1.i_total) <<
(vict_blkno >= ((u64)le32_to_cpu(ac_dinode->id1.bitmap1.i_total) <<
bits_per_unit))) {
ret = -EINVAL;
goto out;