From patchwork Sat Oct 22 01:43:58 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Jason A. Donenfeld" X-Patchwork-Id: 13015725 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3C74C433FE for ; Sat, 22 Oct 2022 01:44:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229608AbiJVBof (ORCPT ); Fri, 21 Oct 2022 21:44:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56440 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229460AbiJVBod (ORCPT ); Fri, 21 Oct 2022 21:44:33 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 192895F4A; Fri, 21 Oct 2022 18:44:27 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 4F4F7B82DBA; Sat, 22 Oct 2022 01:44:26 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E0EE0C433D6; Sat, 22 Oct 2022 01:44:21 +0000 (UTC) Authentication-Results: smtp.kernel.org; dkim=pass (1024-bit key) header.d=zx2c4.com header.i=@zx2c4.com header.b="RKXib5Vl" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zx2c4.com; s=20210105; t=1666403058; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=MoqRTfm9IB8FgPaOUAJRCt6whwpoPY6P6DzU4oQAino=; b=RKXib5Vl1apeqvXSkeHuSjzGVJcpdoYt/8OAwj7E4ekShqhA/prDPzbcZ3L8EURFJsnCT+ VCpgWDuEXVi4KUAlPXmdTapzdA6cjXUVNdUGqKO0UKQGAT4o94LRapJolzjCdwBIIXx41V 8R1b7nFrQ3AUcsbIp6ZnzrkcuAw5BG0= Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id 42623445 (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO); Sat, 22 Oct 2022 01:44:17 +0000 (UTC) From: "Jason A. Donenfeld" To: linux-kernel@vger.kernel.org Cc: "Jason A. Donenfeld" , Kees Cook , Greg Kroah-Hartman , Jakub Kicinski , Russell King , Catalin Marinas , Thomas Bogendoerfer , Heiko Carstens , Herbert Xu , =?utf-8?q?Christoph_B=C3=B6hmwalder?= , Jani Nikula , Jason Gunthorpe , Sakari Ailus , "Martin K . Petersen" , Theodore Ts'o , Andreas Dilger , Jaegeuk Kim , Richard Weinberger , "Darrick J . Wong" , SeongJae Park , Thomas Gleixner , Andrew Morton , Michael Ellerman , Helge Deller , netdev@vger.kernel.org, linux-crypto@vger.kernel.org, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mmc@vger.kernel.org, linux-parisc@vger.kernel.org Subject: [PATCH v1 0/5] convert tree to get_random_u32_{below,above,between}() Date: Fri, 21 Oct 2022 21:43:58 -0400 Message-Id: <20221022014403.3881893-1-Jason@zx2c4.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Hey everyone, Here's the second and final tranche of tree-wide conversions to get random integer handling a bit tamer. It's predominantly another Coccinelle-based patchset. First we s/prandom_u32_max/get_random_u32_below/, since the former is just a deprecated alias for the latter. Then in the next commit we can remove prandom_u32_max all together. I'm quite happy about finally being able to do that. It means that prandom.h is now only for deterministic and repeatable randomness, not non-deterministic/cryptographic randomness. That line is no longer blurred. Then, in order to clean up a bunch of inefficient patterns, we introduce two trivial static inline helper functions built on top of get_random_u32_below: get_random_u32_above and get_random_u32_between. These are pretty straight forward to use and understand. Then the final two patches convert some gnarly open-coded number juggling to use these helpers. I've used Coccinelle for all the treewide patches, so hopefully review is rather uneventful. I didn't accept all of the changes that Coccinelle proposed, though, as these tend to be somewhat context-specific. I erred on the side of just going with the most obvious cases, at least this time through. And then we can address more complicated cases through actual maintainer trees. Since get_random_u32_below() sits in my random.git tree, these patches too will flow through that same tree. Regards, Jason Cc: Kees Cook Cc: Greg Kroah-Hartman Cc: Jakub Kicinski Cc: Russell King Cc: Catalin Marinas Cc: Thomas Bogendoerfer Cc: Heiko Carstens Cc: Herbert Xu Cc: Christoph Böhmwalder Cc: Jani Nikula Cc: Jason Gunthorpe Cc: Sakari Ailus Cc: Martin K. Petersen Cc: Theodore Ts'o Cc: Andreas Dilger Cc: Jaegeuk Kim Cc: Richard Weinberger Cc: Darrick J. Wong Cc: SeongJae Park Cc: Thomas Gleixner Cc: Andrew Morton Cc: Michael Ellerman Cc: Helge Deller Cc: netdev@vger.kernel.org Cc: linux-crypto@vger.kernel.org Cc: linux-block@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org Cc: linux-media@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: loongarch@lists.linux.dev Cc: linux-mips@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-mmc@vger.kernel.org Cc: linux-parisc@vger.kernel.org Jason A. Donenfeld (5): treewide: use get_random_u32_below() instead of deprecated function prandom: remove prandom_u32_max() random: add helpers for random numbers with given floor or range treewide: use get_random_u32_{above,below}() instead of manual loop treewide: use get_random_u32_between() when possible arch/arm/kernel/process.c | 2 +- arch/arm64/kernel/process.c | 2 +- arch/loongarch/kernel/process.c | 2 +- arch/loongarch/kernel/vdso.c | 2 +- arch/mips/kernel/process.c | 2 +- arch/mips/kernel/vdso.c | 2 +- arch/parisc/kernel/vdso.c | 2 +- arch/powerpc/crypto/crc-vpmsum_test.c | 4 +- arch/powerpc/kernel/process.c | 2 +- arch/s390/kernel/process.c | 2 +- arch/s390/kernel/vdso.c | 2 +- arch/sparc/vdso/vma.c | 2 +- arch/um/kernel/process.c | 2 +- arch/x86/entry/vdso/vma.c | 2 +- arch/x86/kernel/module.c | 2 +- arch/x86/kernel/process.c | 2 +- arch/x86/mm/pat/cpa-test.c | 4 +- crypto/rsa-pkcs1pad.c | 2 +- crypto/testmgr.c | 86 +++++++++---------- drivers/block/drbd/drbd_receiver.c | 4 +- drivers/bus/mhi/host/internal.h | 2 +- drivers/dma-buf/st-dma-fence-chain.c | 6 +- .../gpu/drm/i915/gem/i915_gem_execbuffer.c | 2 +- .../drm/i915/gt/intel_execlists_submission.c | 2 +- drivers/gpu/drm/i915/intel_memory_region.c | 4 +- drivers/infiniband/core/cma.c | 2 +- drivers/infiniband/hw/cxgb4/id_table.c | 4 +- drivers/infiniband/hw/hns/hns_roce_ah.c | 5 +- drivers/infiniband/ulp/rtrs/rtrs-clt.c | 2 +- drivers/md/bcache/request.c | 2 +- drivers/media/common/v4l2-tpg/v4l2-tpg-core.c | 8 +- .../media/test-drivers/vidtv/vidtv_demod.c | 8 +- .../test-drivers/vivid/vivid-kthread-cap.c | 2 +- .../test-drivers/vivid/vivid-kthread-out.c | 2 +- .../media/test-drivers/vivid/vivid-radio-rx.c | 4 +- .../media/test-drivers/vivid/vivid-sdr-cap.c | 2 +- .../test-drivers/vivid/vivid-touch-cap.c | 2 +- drivers/mmc/core/core.c | 4 +- drivers/mmc/host/dw_mmc.c | 2 +- drivers/mtd/nand/raw/nandsim.c | 4 +- drivers/mtd/tests/mtd_nandecctest.c | 10 +-- drivers/mtd/tests/stresstest.c | 8 +- drivers/mtd/ubi/debug.c | 2 +- drivers/mtd/ubi/debug.h | 6 +- drivers/net/ethernet/broadcom/cnic.c | 2 +- .../chelsio/inline_crypto/chtls/chtls_io.c | 4 +- drivers/net/phy/at803x.c | 2 +- drivers/net/team/team_mode_random.c | 2 +- drivers/net/wireguard/selftest/allowedips.c | 20 ++--- drivers/net/wireguard/timers.c | 4 +- .../broadcom/brcm80211/brcmfmac/p2p.c | 2 +- .../net/wireless/intel/iwlwifi/mvm/mac-ctxt.c | 2 +- drivers/pci/p2pdma.c | 2 +- drivers/s390/scsi/zfcp_fc.c | 2 +- drivers/scsi/fcoe/fcoe_ctlr.c | 4 +- drivers/scsi/qedi/qedi_main.c | 2 +- drivers/scsi/scsi_debug.c | 6 +- fs/ceph/inode.c | 2 +- fs/ceph/mdsmap.c | 2 +- fs/ext2/ialloc.c | 2 +- fs/ext4/ialloc.c | 2 +- fs/ext4/mmp.c | 8 +- fs/ext4/super.c | 5 +- fs/f2fs/gc.c | 2 +- fs/f2fs/segment.c | 8 +- fs/ubifs/debug.c | 8 +- fs/ubifs/lpt_commit.c | 14 +-- fs/ubifs/tnc_commit.c | 2 +- fs/xfs/libxfs/xfs_alloc.c | 2 +- fs/xfs/libxfs/xfs_ialloc.c | 2 +- fs/xfs/xfs_error.c | 2 +- include/linux/damon.h | 2 +- include/linux/nodemask.h | 2 +- include/linux/prandom.h | 6 -- include/linux/random.h | 24 ++++++ kernel/bpf/core.c | 4 +- kernel/kcsan/selftest.c | 4 +- kernel/locking/test-ww_mutex.c | 4 +- kernel/time/clocksource.c | 2 +- lib/fault-inject.c | 2 +- lib/find_bit_benchmark.c | 4 +- lib/kobject.c | 2 +- lib/reed_solomon/test_rslib.c | 6 +- lib/sbitmap.c | 4 +- lib/test-string_helpers.c | 2 +- lib/test_fprobe.c | 5 +- lib/test_hexdump.c | 10 +-- lib/test_kprobes.c | 5 +- lib/test_list_sort.c | 2 +- lib/test_printf.c | 2 +- lib/test_rhashtable.c | 4 +- lib/test_vmalloc.c | 8 +- mm/kasan/kasan_test.c | 6 +- mm/kfence/core.c | 4 +- mm/kfence/kfence_test.c | 4 +- mm/slub.c | 2 +- mm/swapfile.c | 5 +- net/802/garp.c | 2 +- net/802/mrp.c | 2 +- net/batman-adv/bat_iv_ogm.c | 4 +- net/batman-adv/bat_v_elp.c | 2 +- net/batman-adv/bat_v_ogm.c | 4 +- net/batman-adv/network-coding.c | 2 +- net/bluetooth/mgmt.c | 5 +- net/can/j1939/socket.c | 2 +- net/can/j1939/transport.c | 2 +- net/ceph/mon_client.c | 2 +- net/ceph/osd_client.c | 2 +- net/core/neighbour.c | 4 +- net/core/pktgen.c | 37 ++++---- net/core/stream.c | 2 +- net/ipv4/icmp.c | 2 +- net/ipv4/igmp.c | 6 +- net/ipv4/inet_connection_sock.c | 2 +- net/ipv4/inet_hashtables.c | 2 +- net/ipv4/route.c | 4 +- net/ipv4/tcp_bbr.c | 2 +- net/ipv4/tcp_input.c | 3 +- net/ipv6/addrconf.c | 8 +- net/ipv6/mcast.c | 10 +-- net/ipv6/output_core.c | 8 +- net/ipv6/route.c | 2 +- net/netfilter/ipvs/ip_vs_twos.c | 4 +- net/netfilter/nf_conntrack_core.c | 4 +- net/netfilter/nf_nat_helper.c | 2 +- net/netlink/af_netlink.c | 2 +- net/packet/af_packet.c | 4 +- net/sched/act_gact.c | 2 +- net/sched/act_sample.c | 2 +- net/sched/sch_choke.c | 2 +- net/sched/sch_netem.c | 4 +- net/sctp/socket.c | 2 +- net/sctp/transport.c | 2 +- net/sunrpc/cache.c | 2 +- net/sunrpc/xprtsock.c | 2 +- net/tipc/socket.c | 2 +- net/vmw_vsock/af_vsock.c | 3 +- net/xfrm/xfrm_state.c | 2 +- 138 files changed, 309 insertions(+), 318 deletions(-) Reviewed-by: Greg Kroah-Hartman Reviewed-by: Jason Gunthorpe