From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f173.google.com (mail-pf1-f173.google.com [209.85.210.173]) (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 99A22F513 for ; Sun, 14 Dec 2025 18:35:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.173 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765737311; cv=none; b=EJomRw9RWm2ePit7hEaFM87KAT0OdsNE+E+ZEepGIi92upjQsxEB7dA4D2E411p1Ty2nOklHwMTCMuVFtZDCA++PrbxVT7nzO8FZeDmx8I8g29nNe8hys/O1T846EI6ilQgvmNvQ0pX4hzRr/TOqZMOLCAwEaIeQW+Dos7TunKI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765737311; c=relaxed/simple; bh=w0iYwCaxYamaMcbNo+knhr2NqS54F7HngT78VZy7GI0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=t/rW/vKYJhlbBPsgRTlD7QmfhQNdy33C8ek4obj5BuRCjF5MNaKU7xwxkr7e+VcZJX3v3/Cd2OMgW6i5c2ou8mTJCuk9Rm/qG9qZ9sUkyYQB5tUr2ZqNXYjrBTirmWLj/PDYNcUz6WQic+MQ2wQmZH24WQXjpwwzsQIGaIy4tVA= 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=YIHTlBH7; arc=none smtp.client-ip=209.85.210.173 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="YIHTlBH7" Received: by mail-pf1-f173.google.com with SMTP id d2e1a72fcca58-7aa2170adf9so2116608b3a.0 for ; Sun, 14 Dec 2025 10:35:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1765737309; x=1766342109; 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=lu7Ewifk7NfOmZmxHE0uEUB8jAYgqBv9Gp51r7YP9eI=; b=YIHTlBH7w3xFYcTTW0C1bx+nig1KAvheYjIz8cLI0z2ufiOzMiTqzf8HrFF00fHvrX +sxrmGbMb3KLNnGw5z4vHZLPn8LilhYD+4jOPEH5ryC0hg+0iLK1YA2UCw4XB6Frb0US txfM36ilh7vEHLasCz6yMe3h4CySsoWvh/KUodLVfSL+jrPpfi0TKbjwanUmB+gQDArW jO2EfSPFfgeipcVsvHq+1z9TRuYbEZmiTjbV6BKF3LS0QgE0RyaZVIf9aqVMs0JuRvxv pdAa+TtzCHEu0ofzhBArqc0n/wurb35LxVm1i/0jYqW9RwOaQInqIrUCEPUumbdHa73f VaBw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765737309; x=1766342109; 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=lu7Ewifk7NfOmZmxHE0uEUB8jAYgqBv9Gp51r7YP9eI=; b=rFbNjjkoVqIZmrePaOS9EssY8n9WE1vsFkBN15ozkaLrzHhT/npgJOV5kgOLIJ4TAs Z9uKrVPyXdAZ9yNoGDXRVleOIGpH2nPVUgkjYMZE0NLTpg8NBM+3BpTErRY97DNFBAux pmpew+3OJSJ5wVNe+FoWacKdSXtSJupVgTYLCwCnGxPoOJKKkMvarUgLH+jAa0UqC5nC 46HTlFgSzOTctUtFZQgOez1oVSVkxjhSbB92Yj9Ee/F+3tzBD8SFi4KrmYRTrAzWET20 InzogU8BIBi5Z5e3r2eOx2D6xl6xAZI2JXnLoa/4zZEoLHVJGnKSc0762aNjHx51804W e+GQ== X-Forwarded-Encrypted: i=1; AJvYcCWfmsp7449VLPzuYS4y6pgzBYTqZTwwJnLYc/i+qQh1WRsZXT4kqWavGRy+6+l/fzvXFhj3aMNs68sbpg==@lists.linux.dev X-Gm-Message-State: AOJu0YxO8qvFj4YqNOp61PAmEZxnFlK8aRbEBHABVdxcLPH4ERZQFix3 oITnzEpjAl5vopQzq9Zdw1Hw/2liUkcLENMwFfuunt7ujOPs2shv+IpP X-Gm-Gg: AY/fxX6Az+37lJh0sexh6hf3bfwBwxICYJF3WwPaHESQHmoJPBG7CkDQ7oXKGKZljqa bAMCBuqJMsGvwt5j/hzfvwu5wO3LFC48EJ1/9FPEou9cjrB4qpQxH9ZEx+6cH/AjbtMpzIB4wgJ a0EkmGpgQfl8H7VHechk/fUgRES4fwroX2YbqdNJ2tNp/fOgSSweXFUdX52BASynecMNHlt6Oig +ugnE/WfWyavEJJxSyb1CCAEqtCt/ytDU6r/QWoOSfWN/Y5RrDgJycDGqHj85ElgU3mkvtcnVf2 VrdOX3BWnNZWotD+N/o6K/PAhu/X/z62vSGnHcXw1AHBHyOrLkE0me4pPhVOSKqYEOolBYcFiKe umUIQfYkMZgTD7nT5pchtTqfvhS9pmV6iI2umVVNtzydv+mbJ3zpJM8oifBKqrAj4WcMCPyjKgI X/YIgBdAJLX+D/qy+IelgvUT6WtcI= X-Google-Smtp-Source: AGHT+IG93r9UBrG9bs6iJ2qO7F5KLkinwl/q0mLBLV+C+0tl1Xkn0c2Gzqo3UjM6uX3NndjAuDeohQ== X-Received: by 2002:a05:6a00:4207:b0:7e8:43f5:bd3c with SMTP id d2e1a72fcca58-7f6692aae14mr7049222b3a.40.1765737308739; Sun, 14 Dec 2025 10:35:08 -0800 (PST) Received: from localhost.localdomain ([111.125.240.40]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7f4c5093d5csm10268806b3a.49.2025.12.14.10.35.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 14 Dec 2025 10:35:08 -0800 (PST) From: Prithvi Tambewagh To: syzbot+c818e5c4559444f88aa0@syzkaller.appspotmail.com, jlbec@evilplan.org, joseph.qi@linux.alibaba.com, mark@fasheh.com, heming.zhao@suse.com Cc: linux-kernel@vger.kernel.org, ocfs2-devel@lists.linux.dev, syzkaller-bugs@googlegroups.com, Prithvi Tambewagh Subject: Syzbot test for v3: ocfs2: fix kernel BUG in ocfs2_write_block Date: Mon, 15 Dec 2025 00:04:40 +0530 Message-ID: <20251214183443.21515-1-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 | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) diff --git a/fs/ocfs2/slot_map.c b/fs/ocfs2/slot_map.c index e544c704b583..9406ac37af6b 100644 --- a/fs/ocfs2/slot_map.c +++ b/fs/ocfs2/slot_map.c @@ -132,7 +132,8 @@ int ocfs2_refresh_slot_info(struct ocfs2_super *osb) * this is not true, the read of -1 (UINT64_MAX) will fail. */ ret = ocfs2_read_blocks(INODE_CACHE(si->si_inode), -1, si->si_blocks, - si->si_bh, OCFS2_BH_IGNORE_CACHE, NULL); + si->si_bh, OCFS2_BH_IGNORE_CACHE, + ocfs2_validate_slot_map_block); if (ret == 0) { spin_lock(&osb->osb_lock); ocfs2_update_slot_info(si); @@ -332,6 +333,26 @@ int ocfs2_clear_slot(struct ocfs2_super *osb, int slot_num) return ocfs2_update_disk_slot(osb, osb->slot_info, slot_num); } +static int ocfs2_validate_slot_map_block(struct super_block *sb, + struct buffer_head *bh) +{ + int rc; + + BUG_ON(!buffer_uptodate(bh)); + + if (bh->b_blocknr < OCFS2_SUPER_BLOCK_BLKNO) { + rc = ocfs2_error(sb, + "Invalid Slot Map Buffer Head " + "Block Number : %llu, Should be >= %d", + (unsigned long long)bh->b_blocknr, + OCFS2_SUPER_BLOCK_BLKNO); + if (!rc) + return -EIO; + return rc; + } + return 0; +} + static int ocfs2_map_slot_buffers(struct ocfs2_super *osb, struct ocfs2_slot_info *si) { @@ -383,7 +404,8 @@ static int ocfs2_map_slot_buffers(struct ocfs2_super *osb, bh = NULL; /* Acquire a fresh bh */ status = ocfs2_read_blocks(INODE_CACHE(si->si_inode), blkno, - 1, &bh, OCFS2_BH_IGNORE_CACHE, NULL); + 1, &bh, OCFS2_BH_IGNORE_CACHE, + ocfs2_validate_slot_map_block); if (status < 0) { mlog_errno(status); goto bail; base-commit: 24172e0d79900908cf5ebf366600616d29c9b417 -- 2.43.0