From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 215EC4AEDF; Mon, 1 Apr 2024 15:51:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711986695; cv=none; b=p8vKkatfKybs8S2Dkr6gup/oG5n5HCbgqpU+KPi4EESn1h3kmNn9a3CAsNRgsY3gpWLu1Uj5r71jehdGjAi39oLtBLpMmllbnRRK/Wr8DAJVYOpIROmd81ey+lM6UIyLefWyjcuqusiA/XNFKpPrwEYOfMWP3GeHMbIWdFq9WK8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711986695; c=relaxed/simple; bh=GLbB4M3BlyP194jYoKCngNVrW+tIENRmsPz9blbsjdk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=csSe7TDdkAfieR3N1vs83cC8Vog2TZNdajFUcjyEAt2PtPIfTCMSzsNqdDH1kGvfrAbvBbOLNWrYSyjSlHnxHxDkOeLxRcnTGYwoFcMhTLhkDL7GsTeZo8hz5pX6W6Bd0bapEE6wKGMEoKzpEMLUhcCkX2La+kcY8bKTA5tLL4Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=Kl7oEP3B; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="Kl7oEP3B" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4988BC43390; Mon, 1 Apr 2024 15:51:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1711986694; bh=GLbB4M3BlyP194jYoKCngNVrW+tIENRmsPz9blbsjdk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Kl7oEP3BDSyMI5bpQdG934Zk/83FSt1qku4oO3/6dxQJQorcV6WHTyABVoJPfs2K1 uOhnuTDgc+UlNqD60SBBZSOEUtXgkakF/PCKRkCzym4DeU90uMiJk9Nj2JsAJWLOnh 6kSYBVyJBSp+R8+W9jcp816pzt1zn6NpjLDvTUpk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Heming Zhao , Christoph Hellwig , Song Liu , Sasha Levin Subject: [PATCH 6.8 055/399] md/md-bitmap: fix incorrect usage for sb_index Date: Mon, 1 Apr 2024 17:40:21 +0200 Message-ID: <20240401152550.827028884@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240401152549.131030308@linuxfoundation.org> References: <20240401152549.131030308@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.8-stable review patch. If anyone has any objections, please let me know. ------------------ From: Heming Zhao [ Upstream commit ecbd8ebb51bf7e4939d83b9e6022a55cac44ef06 ] Commit d7038f951828 ("md-bitmap: don't use ->index for pages backing the bitmap file") removed page->index from bitmap code, but left wrong code logic for clustered-md. current code never set slot offset for cluster nodes, will sometimes cause crash in clustered env. Call trace (partly): md_bitmap_file_set_bit+0x110/0x1d8 [md_mod] md_bitmap_startwrite+0x13c/0x240 [md_mod] raid1_make_request+0x6b0/0x1c08 [raid1] md_handle_request+0x1dc/0x368 [md_mod] md_submit_bio+0x80/0xf8 [md_mod] __submit_bio+0x178/0x300 submit_bio_noacct_nocheck+0x11c/0x338 submit_bio_noacct+0x134/0x614 submit_bio+0x28/0xdc submit_bh_wbc+0x130/0x1cc submit_bh+0x1c/0x28 Fixes: d7038f951828 ("md-bitmap: don't use ->index for pages backing the bitmap file") Cc: stable@vger.kernel.org # v6.6+ Signed-off-by: Heming Zhao Reviewed-by: Christoph Hellwig Signed-off-by: Song Liu Link: https://lore.kernel.org/r/20240223121128.28985-1-heming.zhao@suse.com Signed-off-by: Sasha Levin --- drivers/md/md-bitmap.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c index 9672f75c30503..a4976ceae8688 100644 --- a/drivers/md/md-bitmap.c +++ b/drivers/md/md-bitmap.c @@ -234,7 +234,8 @@ static int __write_sb_page(struct md_rdev *rdev, struct bitmap *bitmap, sector_t doff; bdev = (rdev->meta_bdev) ? rdev->meta_bdev : rdev->bdev; - if (pg_index == store->file_pages - 1) { + /* we compare length (page numbers), not page offset. */ + if ((pg_index - store->sb_index) == store->file_pages - 1) { unsigned int last_page_size = store->bytes & (PAGE_SIZE - 1); if (last_page_size == 0) @@ -438,8 +439,8 @@ static void filemap_write_page(struct bitmap *bitmap, unsigned long pg_index, struct page *page = store->filemap[pg_index]; if (mddev_is_clustered(bitmap->mddev)) { - pg_index += bitmap->cluster_slot * - DIV_ROUND_UP(store->bytes, PAGE_SIZE); + /* go to node bitmap area starting point */ + pg_index += store->sb_index; } if (store->file) @@ -952,6 +953,7 @@ static void md_bitmap_file_set_bit(struct bitmap *bitmap, sector_t block) unsigned long index = file_page_index(store, chunk); unsigned long node_offset = 0; + index += store->sb_index; if (mddev_is_clustered(bitmap->mddev)) node_offset = bitmap->cluster_slot * store->file_pages; @@ -982,6 +984,7 @@ static void md_bitmap_file_clear_bit(struct bitmap *bitmap, sector_t block) unsigned long index = file_page_index(store, chunk); unsigned long node_offset = 0; + index += store->sb_index; if (mddev_is_clustered(bitmap->mddev)) node_offset = bitmap->cluster_slot * store->file_pages; -- 2.43.0