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authorAlan Cox <alan@redhat.com>2008-10-13 10:39:13 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-13 09:51:41 -0700
commit452a00d2ee288f2cbc36f676edd06cb14d2878c1 (patch)
treec8251c73924a6ac9b174bc557357bfeff0c8d1a8 /fs
parentf4d2a6c2096b764decb20070b1bf4356de9144a8 (diff)
tty: Make get_current_tty use a kref
We now return a kref covered tty reference. That ensures the tty structure doesn't go away when you have a return from get_current_tty. This is not enough to protect you from most of the resources being freed behind your back - yet. [Updated to include fixes for SELinux problems found by Andrew Morton and an s390 leak found while debugging the former] Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/dquot.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/dquot.c b/fs/dquot.c
index 8ec4d6cc763..7417a6ca312 100644
--- a/fs/dquot.c
+++ b/fs/dquot.c
@@ -897,8 +897,9 @@ static void print_warning(struct dquot *dquot, const int warntype)
mutex_lock(&tty_mutex);
tty = get_current_tty();
+ mutex_unlock(&tty_mutex);
if (!tty)
- goto out_lock;
+ return;
tty_write_message(tty, dquot->dq_sb->s_id);
if (warntype == QUOTA_NL_ISOFTWARN || warntype == QUOTA_NL_BSOFTWARN)
tty_write_message(tty, ": warning, ");
@@ -926,8 +927,7 @@ static void print_warning(struct dquot *dquot, const int warntype)
break;
}
tty_write_message(tty, msg);
-out_lock:
- mutex_unlock(&tty_mutex);
+ tty_kref_put(tty);
}
#endif