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quota: info leak in quota_getquota() 

The if_dqblk struct has a 4 byte hole at the end of the struct so
uninitialized stack information is leaked to user space.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Dan Carpenter 2013-11-01 13:21:54 +03:00 committed by Jan Kara
parent 1ce0aa802c
commit 18da65e7d3
1 changed files with 1 additions and 0 deletions
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fs/quota/quota.c
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@ -117,6 +117,7 @@ static int quota_setinfo(struct super_block *sb, int type, void __user *addr)
static void copy_to_if_dqblk(struct if_dqblk *dst, struct fs_disk_quota *src) static void copy_to_if_dqblk(struct if_dqblk *dst, struct fs_disk_quota *src)
{ {
memset(dst, 0, sizeof(*dst));
dst->dqb_bhardlimit = src->d_blk_hardlimit; dst->dqb_bhardlimit = src->d_blk_hardlimit;
dst->dqb_bsoftlimit = src->d_blk_softlimit; dst->dqb_bsoftlimit = src->d_blk_softlimit;
dst->dqb_curspace = src->d_bcount; dst->dqb_curspace = src->d_bcount;