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Minor bug fix for linux-3.14

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Merge tag 'jfs-3.14' of git://github.com/kleikamp/linux-shaggy

Pull jfs fix from David Kleikamp:
 "Minor bug fix for linux-3.14"

* tag 'jfs-3.14' of git://github.com/kleikamp/linux-shaggy:
  jfs: fix xattr value size overflow in __jfs_setxattr
This commit is contained in:
Linus Torvalds 2014-01-31 08:14:35 -08:00
commit e30b82bbe0
1 changed files with 14 additions and 1 deletions
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15
fs/jfs/xattr.c
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@ -791,6 +791,19 @@ int __jfs_setxattr(tid_t tid, struct inode *inode, const char *name,
/* Completely new ea list */
xattr_size = sizeof (struct jfs_ea_list);
/*
* The size of EA value is limitted by on-disk format up to
* __le16, there would be an overflow if the size is equal
* to XATTR_SIZE_MAX (65536). In order to avoid this issue,
* we can pre-checkup the value size against USHRT_MAX, and
* return -E2BIG in this case, which is consistent with the
* VFS setxattr interface.
*/
if (value_len >= USHRT_MAX) {
rc = -E2BIG;
goto release;
}
ea = (struct jfs_ea *) ((char *) ealist + xattr_size);
ea->flag = 0;
ea->namelen = namelen;
@ -805,7 +818,7 @@ int __jfs_setxattr(tid_t tid, struct inode *inode, const char *name,
/* DEBUG - If we did this right, these number match */
if (xattr_size != new_size) {
printk(KERN_ERR
"jfs_xsetattr: xattr_size = %d, new_size = %d\n",
"__jfs_setxattr: xattr_size = %d, new_size = %d\n",
xattr_size, new_size);
rc = -EINVAL;