quota: do not allow setting of quota limits to too high values

We should check whether quota limits set via Q_SETQUOTA are not exceeding
limits which quota format is able to handle.

Signed-off-by: Andrew Perepechko <andrew.perepechko@sun.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/quota.h b/include/linux/quota.h
index eb560d031acd..326cb80e3867 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -206,6 +206,8 @@ struct mem_dqinfo {
         unsigned long dqi_flags;
         unsigned int dqi_bgrace;
         unsigned int dqi_igrace;
+        qsize_t dqi_maxblimit;
+        qsize_t dqi_maxilimit;
         union {
                 struct v1_mem_dqinfo v1_i;
                 struct v2_mem_dqinfo v2_i;