From: Richard Weinberger <richard@nod.at>
To: linux-mtd@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Richard Weinberger <richard@nod.at>,
Wenwen Wang <wenwen@cs.uga.edu>
Subject: [PATCH] Revert "ubifs: Fix memory leak bug in alloc_ubifs_info() error path"
Date: Thu, 24 Oct 2019 10:25:35 +0200 [thread overview]
Message-ID: <20191024082535.1022-1-richard@nod.at> (raw)
This reverts commit 9163e0184bd7d5f779934d34581843f699ad2ffd.
At the point when ubifs_fill_super() runs, we have already a reference
to the super block. So upon deactivate_locked_super() c will get
free()'ed via ->kill_sb().
Cc: Wenwen Wang <wenwen@cs.uga.edu>
Fixes: 9163e0184bd7 ("ubifs: Fix memory leak bug in alloc_ubifs_info() error path")
Reported-by: https://twitter.com/grsecurity/status/1180609139359277056
Signed-off-by: Richard Weinberger <richard@nod.at>
---
fs/ubifs/super.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 7d4547e5202d..5e1e8ec0589e 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -2267,10 +2267,8 @@ static struct dentry *ubifs_mount(struct file_system_type *fs_type, int flags,
}
} else {
err = ubifs_fill_super(sb, data, flags & SB_SILENT ? 1 : 0);
- if (err) {
- kfree(c);
+ if (err)
goto out_deact;
- }
/* We do not support atime */
sb->s_flags |= SB_ACTIVE;
if (IS_ENABLED(CONFIG_UBIFS_ATIME_SUPPORT))
--
2.16.4
next reply other threads:[~2019-10-24 8:26 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-24 8:25 Richard Weinberger [this message]
2019-11-15 13:21 ` [PATCH] Revert "ubifs: Fix memory leak bug in alloc_ubifs_info() error path" Romain Izard
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