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 --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c index a6bce5b1fb1dc..1b9c7a387dc71 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