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 A593E3F8F4; Mon, 1 Apr 2024 16:37:28 +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=1711989448; cv=none; b=kRqT1WNx0lIDt5vvxMYGfobsr88Ny9qqZeWrESqTdXjrntK7lgF/bqGkhF/YEw2Ex6rjgewIKlPxK99U9HCjHtceGxdtlsoK/vV8BfbQLq6fs2pSosY/5EnH0XiUGHHcTW2ZitKHkw7CXPXQIAMx7JyHdllK1EqypEXoVBeTo0k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711989448; c=relaxed/simple; bh=QHXImpzBGm/ILsn/7jvHMyl21hDj6UNJAgC/ohUmsb4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=l3fXALnAkoY9pY4h35INWuUxkiU+CLHVOdHHCEGVa3YUcrrlUKkcO7NLjFG7mraU7mpjwIDBfesJB/cqh0k5xMSR72pMS8eCgubTwpB+WU+mvKrjJr9ZTbsEcEeatFZIF6Ngceol545pD5YjaGhqNrD5aGb6kb0VQCVX6fh8xoI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=wTJZ5f8m; 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="wTJZ5f8m" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2C1C5C433C7; Mon, 1 Apr 2024 16:37:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1711989448; bh=QHXImpzBGm/ILsn/7jvHMyl21hDj6UNJAgC/ohUmsb4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wTJZ5f8mTvTyU8AbQU85yik8oltSp/TH3VSlOnRsewHJYRPcBX+jDgIE7XYuvHzv1 biFEA5MLd55IoX8aKaV02NUCMErbCp+ytggVo0Iiu7BKs44zJaQvJHnvPXVcCb5wOe 7elhmeTPoqmdRAnJXkFRXV3NFHa3gfHGqApe+wzk= 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 6.6 051/396] md/md-bitmap: fix incorrect usage for sb_index Date: Mon, 1 Apr 2024 17:41:40 +0200 Message-ID: <20240401152549.446783478@linuxfoundation.org> X-Mailer: git-send-email 2.44.0 In-Reply-To: <20240401152547.867452742@linuxfoundation.org> References: <20240401152547.867452742@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 6.6-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 6f9ff14971f98..42d4c38ba54d5 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