Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

Pull quota, fsnotify and ext2 updates from Jan Kara:
 "Changes to locking of some quota operations from dedicated quota mutex
  to s_umount semaphore, a fsnotify fix and a simple ext2 fix"

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  quota: Fix bogus warning in dquot_disable()
  fsnotify: Fix possible use-after-free in inode iteration on umount
  ext2: reject inodes with negative size
  quota: Remove dqonoff_mutex
  ocfs2: Use s_umount for quota recovery protection
  quota: Remove dqonoff_mutex from dquot_scan_active()
  ocfs2: Protect periodic quota syncing with s_umount semaphore
  quota: Use s_umount protection for quota operations
  quota: Hold s_umount in exclusive mode when enabling / disabling quotas
  fs: Provide function to get superblock with exclusive s_umount

1 files changed, 4 insertions, 0 deletions

diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index e173afe92661..0093ea2512a8 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -1478,6 +1478,10 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
                 inode->i_size |= ((__u64)le32_to_cpu(raw_inode->i_size_high)) << 32;
         else
                 ei->i_dir_acl = le32_to_cpu(raw_inode->i_dir_acl);
+        if (i_size_read(inode) < 0) {
+                ret = -EFSCORRUPTED;
+                goto bad_inode;
+        }
         ei->i_dtime = 0;
         inode->i_generation = le32_to_cpu(raw_inode->i_generation);
         ei->i_state = 0;