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authorNikolay Borisov <kernel@kyup.com>2016-03-03 10:54:57 +0100
committerJan Kara <jack@suse.cz>2016-03-03 11:01:58 +0100
commitab73ef46398e2c0159f3a71de834586422d2a44a (patch)
tree4388f22e3f80dbf4b702e90c7e71467fedcd5ea3 /fs/quota
parent6332b9b5e79769b3e9d79d664896b872d7ba6a66 (diff)
downloadlinux-ab73ef46398e2c0159f3a71de834586422d2a44a.tar.bz2
quota: Fix possible GPF due to uninitialised pointers
When dqget() in __dquot_initialize() fails e.g. due to IO error, __dquot_initialize() will pass an array of uninitialized pointers to dqput_all() and thus can lead to deference of random data. Fix the problem by properly initializing the array. CC: stable@vger.kernel.org Signed-off-by: Nikolay Borisov <kernel@kyup.com> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/quota')
-rw-r--r--fs/quota/dquot.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index e8467dc90c7e..dcec1edf579f 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -1410,7 +1410,7 @@ static int dquot_active(const struct inode *inode)
static int __dquot_initialize(struct inode *inode, int type)
{
int cnt, init_needed = 0;
- struct dquot **dquots, *got[MAXQUOTAS];
+ struct dquot **dquots, *got[MAXQUOTAS] = {};
struct super_block *sb = inode->i_sb;
qsize_t rsv;
int ret = 0;
@@ -1427,7 +1427,6 @@ static int __dquot_initialize(struct inode *inode, int type)
int rc;
struct dquot *dquot;
- got[cnt] = NULL;
if (type != -1 && cnt != type)
continue;
/*