diff mbox series

[4.9,131/139] reiserfs: Fix memory leak in reiserfs_parse_options()

Message ID 20201027134908.373144979@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg KH Oct. 27, 2020, 1:50 p.m. UTC 
From: Jan Kara <jack@suse.cz>

[ Upstream commit e9d4709fcc26353df12070566970f080e651f0c9 ]

When a usrjquota or grpjquota mount option is used multiple times, we
will leak memory allocated for the file name. Make sure the last setting
is used and all the previous ones are properly freed.

Reported-by: syzbot+c9e294bbe0333a6b7640@syzkaller.appspotmail.com
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/reiserfs/super.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 677608a89b08d..c533d8715a6ca 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1234,6 +1234,10 @@  static int reiserfs_parse_options(struct super_block *s,
 						 "turned on.");
 				return 0;
 			}
+			if (qf_names[qtype] !=
+			    REISERFS_SB(s)->s_qf_names[qtype])
+				kfree(qf_names[qtype]);
+			qf_names[qtype] = NULL;
 			if (*arg) {	/* Some filename specified? */
 				if (REISERFS_SB(s)->s_qf_names[qtype]
 				    && strcmp(REISERFS_SB(s)->s_qf_names[qtype],
@@ -1263,10 +1267,6 @@  static int reiserfs_parse_options(struct super_block *s,
 				else
 					*mount_options |= 1 << REISERFS_GRPQUOTA;
 			} else {
-				if (qf_names[qtype] !=
-				    REISERFS_SB(s)->s_qf_names[qtype])
-					kfree(qf_names[qtype]);
-				qf_names[qtype] = NULL;
 				if (qtype == USRQUOTA)
 					*mount_options &= ~(1 << REISERFS_USRQUOTA);
 				else