From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f54.google.com (mail-pj1-f54.google.com [209.85.216.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1C381199FAC for ; Sat, 6 Dec 2025 12:31:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.54 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765024301; cv=none; b=jww1SiDBFzPr4X3Q0+zhRVQU0i3avc+NHYctZ7FIHAAXqeqD6a5L539rv8TUmCipeE4mGdbc56B3Tq1+jD3Fbc+SMXCxqUKC7OUfQbbszuuU75zPpLPErXy2MryYwZdatmhsZbSy7d7jRHTNDA/gC11G4Tf1zwRAdSUFTE5K1Lc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765024301; c=relaxed/simple; bh=qPyv+FhaSq47XVLsCXQLi9CDfoboWzwT/pxzsncu2BQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SCt2cO78xSZwt8Sx7TheqkZAPgDY6/yKrtbJEYp19PRXVv0ytgaj6YliL3A4NAv++FgnYwvlREaKU5nu77sv5uXr0Po2ESwG9v6WEUHf94Ny4G62ffATRQQaJOrMdrUqT9+W46PDDiGIywrHoi/hxW78/zDlu9nvnL+YbNgbZGc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=R2VRct03; arc=none smtp.client-ip=209.85.216.54 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="R2VRct03" Received: by mail-pj1-f54.google.com with SMTP id 98e67ed59e1d1-343684a06b2so3069858a91.1 for ; Sat, 06 Dec 2025 04:31:39 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1765024299; x=1765629099; darn=lists.linux.dev; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=MQ6sUIQeO9wN86/IeO38lG0jZ2ssRJIsnfgLRfSeJng=; b=R2VRct037tB1C9P0gT+bWe6VBsTdKR5D2J/bl9wqK36hNg/kNoKQJVOGO3a9iXNi8d BP6KfUZMLY5PmL5lE2DfQT93BziLNSrsOEq2yQ3zN2RPKl8VkvV/IYaEviwy1VGe8RzE WF1sBh4f0HAd4RPZVibm3H3RazUMlbfZVqXYxcgHEvMOMHJPWx5VClv5zlquwY3bMBGK Kirdq+lzDXs4KpQWBdy30Zgbx9/iy77MDX+3tTjADp/xtyD5LIp6FOnbqYA0i/CEmy23 fzmFcN7hJlQWRDOkauhP6nT/ZxFjXQIzvWfbh1P1lF7kDLijdTvgGoXEX9xH4AqM2Qmo zNUg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765024299; x=1765629099; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=MQ6sUIQeO9wN86/IeO38lG0jZ2ssRJIsnfgLRfSeJng=; b=XQoYuI7UyPrzNy6WSOoP5tPhI3yZJ3qrSZOlsl240PnzYSby4Y95cFX90M8wLEk+5o iEgP624Og+IJ3thRLIBVnlFZKzwkDTD164catLHPtI5pTlj9KUSi6OV+W43P8E5QQpW6 4AT+0sgn1zG0OFm8IfZXxapIrdJWZPSDPyZxFcEHJnawSbuQGy79AAL3VSyBAf7XZpWc unJsQxolr0clFSj57dvwM1OZ0kckI7hCJsWP4QKyNxr3lTgOAEN5xWqn0KcDIkYI4k7s 8zTGmxITAoJpKL/FklYTIXdnWkH0Fn5dDWiR5srD9G9UflXfVgT8uKD5CBTE7J1qo5l1 jBug== X-Forwarded-Encrypted: i=1; AJvYcCX5fk230xIVNFYcDioJn+McBtpbo4wITO8rCCRaEhWZTNQtO8exSa8t++0FbJxRzhjIZ4PHk4OkOmdRNQ==@lists.linux.dev X-Gm-Message-State: AOJu0Yz+f0yLwUVabtvDS8ofiaShOBdR+8OVtOXgdTt1S/sxrDimaqRM p/MmtDWq3Dx8WJXiOVCHmubH4iv9mpFHt1pBhZ02FZxzcBmiRnM0EISw X-Gm-Gg: ASbGnctnO/4lXVP4DCeQNXbvspTDVBl/ozMAH1WmUPFQmalgSyLpMRjQR1I1FQFlQtU xe8tLwUkiPmS/8Q1TE4+Ta0RUmjPeV+sTzO8PtL8oOKzd7Rl0QwVlfJuhTdrOyb/jjmhga45qjg g/b75pkrro/pkMdXQ4cOpCMUi6+nJEbvW+pNptPj37IRZ8sQLRGTt+nKuV64yEtSI6zPQicqrks Pii27aKrUKaEVgFIZr6P3Eeteg16ycbyEkMz2vUO5KKXbvFuRRwPyL1UkYtKyx3LHo1ivtcIdmw ujimiujTkkb4Ygrq77rXvyZ2xaX22XSSL46Vj31KQX82DvyIqrVwS02RBVZlZbv7ss/IjBeQrl6 SVLKDfeURuKFYQyKYK5ny9KYgQjczccX6SOLiAI7qvcT/5+mTP27CYxvn5PP+ZEE/Lk8dxfly+E CIeyvRz37pDxCBa3w/SuTsW+0JdQ== X-Google-Smtp-Source: AGHT+IGtaB0EGCaAK2Wt9cTECFElyS6yuLR2Hf6WAOGYhBpxMm2ZHQxuY++ypKoDZzes/kdKOWZ63g== X-Received: by 2002:a17:90b:350c:b0:340:ec6f:5ac5 with SMTP id 98e67ed59e1d1-349a24ec644mr1681359a91.2.1765024299363; Sat, 06 Dec 2025 04:31:39 -0800 (PST) Received: from localhost.localdomain ([114.79.178.20]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-349b601646esm1265194a91.3.2025.12.06.04.31.35 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 06 Dec 2025 04:31:38 -0800 (PST) From: Prithvi Tambewagh To: syzbot+c818e5c4559444f88aa0@syzkaller.appspotmail.com, jlbec@evilplan.org, joseph.qi@linux.alibaba.com, mark@fasheh.com Cc: linux-kernel@vger.kernel.org, ocfs2-devel@lists.linux.dev, syzkaller-bugs@googlegroups.com, Prithvi Tambewagh Subject: Syzbot testing for ocfs2: Fix kernel BUG in ocfs2_write_block Date: Sat, 6 Dec 2025 18:01:26 +0530 Message-ID: <20251206123128.166117-1-activprithvi@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <66eb6a0e.050a0220.115905.001b.GAE@google.com> References: <66eb6a0e.050a0220.115905.001b.GAE@google.com> Precedence: bulk X-Mailing-List: ocfs2-devel@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit #syz test git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 24172e0d79900908cf5ebf366600616d29c9b417 Signed-off-by: Prithvi Tambewagh --- fs/ocfs2/slot_map.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/fs/ocfs2/slot_map.c b/fs/ocfs2/slot_map.c index e544c704b583..de793a83555c 100644 --- a/fs/ocfs2/slot_map.c +++ b/fs/ocfs2/slot_map.c @@ -193,6 +193,16 @@ static int ocfs2_update_disk_slot(struct ocfs2_super *osb, else ocfs2_update_disk_slot_old(si, slot_num, &bh); spin_unlock(&osb->osb_lock); + if (bh->b_blocknr < OCFS2_SUPER_BLOCK_BLKNO) { + status = ocfs2_error(osb->sb, + "Invalid Buffer Head Block Number : %llu, " + "Should be >= %d", + le16_to_cpu(bh->b_blocknr), + le16_to_cpu((int)OCFS2_SUPER_BLOCK_BLKNO)); + if(!status) { + return -EIO; + } + } status = ocfs2_write_block(osb, bh, INODE_CACHE(si->si_inode)); if (status < 0) base-commit: 24172e0d79900908cf5ebf366600616d29c9b417 -- 2.43.0