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From: Jan Kara <jack@suse.cz>
To: reiserfs-devel@vger.kernel.org
Cc: <linux-fsdevel@vger.kernel.org>, Jan Kara <jack@suse.cz>
Subject: [PATCH] reiserfs: Fix memory leak in reiserfs_parse_options()
Date: Wed,  4 Mar 2020 14:18:59 +0100	[thread overview]
Message-ID: <20200304131859.24219-1-jack@suse.cz> (raw)

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>
---
 fs/reiserfs/super.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

I'll queue this patch to my tree if nobody objects.

diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index a6bce5b1fb1d..1b9c7a387dc7 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1258,6 +1258,10 @@ 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],
@@ -1287,10 +1291,6 @@ 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
-- 
2.16.4


WARNING: multiple messages have this Message-ID (diff)
From: Jan Kara <jack@suse.cz>
To: reiserfs-devel@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org, Jan Kara <jack@suse.cz>
Subject: [PATCH] reiserfs: Fix memory leak in reiserfs_parse_options()
Date: Wed,  4 Mar 2020 14:18:59 +0100	[thread overview]
Message-ID: <20200304131859.24219-1-jack@suse.cz> (raw)

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>
---
 fs/reiserfs/super.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

I'll queue this patch to my tree if nobody objects.

diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index a6bce5b1fb1d..1b9c7a387dc7 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -1258,6 +1258,10 @@ 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],
@@ -1287,10 +1291,6 @@ 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
-- 
2.16.4


             reply	other threads:[~2020-03-04 13:19 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-04 13:18 Jan Kara [this message]
2020-03-04 13:18 ` [PATCH] reiserfs: Fix memory leak in reiserfs_parse_options() Jan Kara

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