linux-kernel - [PATCH 0/2] jfs: add checks read-only to prevent NULL pointer deref

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Message-Id: <20241224144914.976419-1-kovalev@altlinux.org>
Date: Tue, 24 Dec 2024 17:49:12 +0300
From: Vasiliy Kovalev <kovalev@...linux.org>
To: Dave Kleikamp <shaggy@...nel.org>,
	Josef Bacik <josef@...icpanda.com>,
	Matthew Wilcox <willy@...radead.org>,
	Christian Brauner <brauner@...nel.org>,
	jfs-discussion@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org
Cc: lvc-project@...uxtesting.org,
	kovalev@...linux.org,
	syzbot+4e89b5368baba8324e07@...kaller.appspotmail.com
Subject: [PATCH 0/2]  jfs: add checks read-only to prevent NULL pointer deref

These two patches add read-only checks in JFS functions to
prevent attempts to modify a read-only filesystem, which could
lead to NULL pointer dereferencing. 

Reported-by: syzbot+4e89b5368baba8324e07@...kaller.appspotmail.com
Closes: https://syzkaller.appspot.com/bug?extid=4e89b5368baba8324e07

[PATCH 1/2] jfs: add check read-only before txBeginAnon() call
[PATCH 2/2] jfs: add check read-only before truncation in jfs_truncate_nolock()