From: syzbot <syzbot+62dfea789a2cedac1298@syzkaller.appspotmail.com>
To: linux-kernel@vger.kernel.org
Subject: Re: [syzbot] Re: [syzbot] [overlayfs?] general protection fault in clone_private_mount
Date: Thu, 06 Feb 2025 23:02:27 -0800 [thread overview]
Message-ID: <67a5b003.050a0220.2b1e6.0015.GAE@google.com> (raw)
In-Reply-To: <67a4b9e8.050a0220.d6d27.0000.GAE@google.com>
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Subject: Re: [syzbot] [overlayfs?] general protection fault in clone_private_mount
Author: lizhi.xu@windriver.com
#syz test
diff --git a/fs/namespace.c b/fs/namespace.c
index 1314f11ed961..8e2ff3dbab58 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2421,6 +2421,9 @@ struct vfsmount *clone_private_mount(const struct path *path)
if (!check_mnt(old_mnt))
return ERR_PTR(-EINVAL);
} else {
+ if (!is_mounted(&old_mnt->mnt))
+ return ERR_PTR(-EINVAL);
+
/* Make sure this isn't something purely kernel internal. */
if (!is_anon_ns(old_mnt->mnt_ns))
return ERR_PTR(-EINVAL);
next prev parent reply other threads:[~2025-02-07 7:02 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-06 13:32 [syzbot] [overlayfs?] general protection fault in clone_private_mount syzbot
2025-02-06 15:53 ` Amir Goldstein
2025-02-07 7:02 ` syzbot [this message]
2025-02-07 7:13 ` [PATCH] fs: prevent access to ns if it is not mounted Lizhi Xu
2025-02-07 12:42 ` Amir Goldstein
2025-02-07 12:50 ` Christian Brauner
2025-02-08 7:25 ` [syzbot] [overlayfs?] general protection fault in clone_private_mount syzbot
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