From patchwork Fri Mar 15 20:47:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Patchwork-Id: 13594047 Received: from todd.t-8ch.de (todd.t-8ch.de [159.69.126.157]) (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 B913617984; Fri, 15 Mar 2024 20:48:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.69.126.157 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710535706; cv=none; b=FePlZtiFjovVthCNE34wDVL3vCHniAp/0QpN+12oauuReCldP8y3gYrnrUP3tZ8QT50fRhRQxjUqxcKGMWWINX0tAj+11acHJf//gogN8EPvYZNnKvoGE2GTxTzuxWu/FtYZW2jo2DE8AyKikiuwxQAv8i3A/rrns9U+DsJTEQQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710535706; c=relaxed/simple; bh=UQpx8/b/XTKLmVj1eXwhJn/1lYtutU5drdFjuhtFc8Q=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=ux3s/Vbwpai/txTEiy96AlCT1NFSJMeguc46eUleftDi91zqzIq6LkxdPwrA4TAP0GAa4BvdL1neQeYth/ehG29/S7ah5WKpNQEIEw5sukalTfS5hOfAC3A8dW+8yXFDVKb2PLUjiE3ooTg2zgl9B4UMTaTUgjmJ8ehJeRGbDTY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=weissschuh.net; spf=pass smtp.mailfrom=weissschuh.net; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b=qNDlogzy; arc=none smtp.client-ip=159.69.126.157 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=weissschuh.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=weissschuh.net header.i=@weissschuh.net header.b="qNDlogzy" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1710535696; bh=UQpx8/b/XTKLmVj1eXwhJn/1lYtutU5drdFjuhtFc8Q=; h=From:Subject:Date:To:Cc:From; b=qNDlogzyuL5NF8OjRV46+rDUbxyIMtOYZlFLSwLbviicTyfpUQvpFjMhavWRGxMPb +KLyaJldvQaCaK8bZDu2BzGm/LykYpsCaxYcWdiFuplr9priximfT/xu1KNJzE8mNQ QUnnlq6A+2zF05g+yrdBYpLqYgXYSWY/mpzB+Yw8= From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= Subject: [PATCH 00/11] sysctl: treewide: constify ctl_table argument of sysctl handlers Date: Fri, 15 Mar 2024 21:47:58 +0100 Message-Id: <20240315-sysctl-const-handler-v1-0-1322ac7cb03d@weissschuh.net> Precedence: bulk X-Mailing-List: linux-hardening@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAP+z9GUC/x2MQQqAIBAAvxJ7bqGUSvpKdFDbakEs3Igi+nvSc WBmHhBKTAJ98UCik4W3mKEuC/CrjQshT5lBVUrXSrUot/gjoN+iHJiNKVBCY7RryNmOTAU53RP NfP3bYXzfDzWhXLJmAAAA To: Greg Kroah-Hartman , Kees Cook , Alexei Starovoitov , Daniel Borkmann , John Fastabend , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Muchun Song , Andrew Morton , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , David Ahern , Simon Horman , Julian Anastasov , Pablo Neira Ayuso , Jozsef Kadlecsik , Florian Westphal , Luis Chamberlain , Joel Granados , Catalin Marinas , Will Deacon , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Gerald Schaefer , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Phillip Potter , Theodore Ts'o , "Jason A. Donenfeld" , Sudip Mukherjee , Mark Rutland , Atish Patra , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexander Viro , Christian Brauner , Jan Kara , Eric Biederman , Chandan Babu R , "Darrick J. Wong" , Steven Rostedt , Masami Hiramatsu , Peter Zijlstra , Arnaldo Carvalho de Melo , Namhyung Kim , Alexander Shishkin , Ian Rogers , Adrian Hunter , Balbir Singh , "Naveen N. Rao" , Anil S Keshavamurthy , Petr Mladek , John Ogness , Sergey Senozhatsky , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Ben Segall , Mel Gorman , Daniel Bristot de Oliveira , Valentin Schneider , Andy Lutomirski , Will Drewry , John Stultz , Stephen Boyd , Mathieu Desnoyers , "Matthew Wilcox (Oracle)" , Roopa Prabhu , Nikolay Aleksandrov , Remi Denis-Courmont , Allison Henderson , Marcelo Ricardo Leitner , Xin Long , Chuck Lever , Jeff Layton , Neil Brown , Olga Kornievskaia , Dai Ngo , Tom Talpey , Trond Myklebust , Anna Schumaker , John Johansen , Paul Moore , James Morris , "Serge E. Hallyn" , Alexander Popov Cc: linux-hardening@vger.kernel.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, lvs-devel@vger.kernel.org, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, linux-fsdevel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-s390@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-xfs@vger.kernel.org, linux-trace-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, kexec@lists.infradead.org, bridge@lists.linux.dev, linux-rdma@vger.kernel.org, rds-devel@oss.oracle.com, linux-sctp@vger.kernel.org, linux-nfs@vger.kernel.org, apparmor@lists.ubuntu.com, linux-security-module@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1710535695; l=6875; i=linux@weissschuh.net; s=20221212; h=from:subject:message-id; bh=UQpx8/b/XTKLmVj1eXwhJn/1lYtutU5drdFjuhtFc8Q=; b=bVuYFtDUnQnTEuvf1YPhVHCMGvQdlkNbjMU3q96YFVTF+/BakIUECyvigrykuveXZ44uroO53 +PypwG0ixxgAcYPFaz0HjaUa6FY1M4K7insg4HvI7YV0Uo2rCOzuB/j X-Developer-Key: i=linux@weissschuh.net; a=ed25519; pk=KcycQgFPX2wGR5azS7RhpBqedglOZVgRPfdFSPB1LNw= * Patch 1 is a bugfix for the stack_erasing sysctl handler * Patches 2-10 change various helper functions throughout the kernel to be able to handle 'const ctl_table'. * Patch 11 changes the signatures of all proc handlers through the tree. Some other signatures are also adapted, for details see the commit message. Only patch 1 changes any code at all. The series was compile-tested on top of next-20230315 for i386, x86_64, arm, arm64, riscv, loongarch and s390. This series was split from my larger series sysctl-const series [0]. It only focusses on the proc_handlers but is an important step to be able to move all static definitions of ctl_table into .rodata. [0] https://lore.kernel.org/lkml/20231204-const-sysctl-v2-0-7a5060b11447@weissschuh.net/ Signed-off-by: Thomas Weißschuh --- Thomas Weißschuh (11): stackleak: don't modify ctl_table argument cgroup: bpf: constify ctl_table arguments and fields hugetlb: constify ctl_table arguments of utility functions utsname: constify ctl_table arguments of utility function neighbour: constify ctl_table arguments of utility function ipv4/sysctl: constify ctl_table arguments of utility functions ipv6/addrconf: constify ctl_table arguments of utility functions ipv6/ndisc: constify ctl_table arguments of utility function ipvs: constify ctl_table arguments of utility functions sysctl: constify ctl_table arguments of utility function sysctl: treewide: constify the ctl_table argument of handlers arch/arm64/kernel/armv8_deprecated.c | 2 +- arch/arm64/kernel/fpsimd.c | 2 +- arch/s390/appldata/appldata_base.c | 10 +-- arch/s390/kernel/debug.c | 2 +- arch/s390/kernel/topology.c | 2 +- arch/s390/mm/cmm.c | 6 +- arch/x86/kernel/itmt.c | 2 +- drivers/cdrom/cdrom.c | 6 +- drivers/char/random.c | 5 +- drivers/macintosh/mac_hid.c | 2 +- drivers/net/vrf.c | 2 +- drivers/parport/procfs.c | 14 ++-- drivers/perf/arm_pmuv3.c | 6 +- drivers/perf/riscv_pmu_sbi.c | 2 +- fs/coredump.c | 4 +- fs/dcache.c | 3 +- fs/drop_caches.c | 4 +- fs/exec.c | 6 +- fs/file_table.c | 3 +- fs/fs-writeback.c | 2 +- fs/inode.c | 3 +- fs/pipe.c | 2 +- fs/quota/dquot.c | 4 +- fs/xfs/xfs_sysctl.c | 33 ++++----- include/linux/filter.h | 2 +- include/linux/ftrace.h | 4 +- include/linux/mm.h | 8 +-- include/linux/perf_event.h | 6 +- include/linux/security.h | 2 +- include/linux/sysctl.h | 36 +++++----- include/linux/vmstat.h | 6 +- include/linux/writeback.h | 2 +- include/net/ndisc.h | 2 +- include/net/neighbour.h | 6 +- include/net/netfilter/nf_hooks_lwtunnel.h | 2 +- ipc/ipc_sysctl.c | 14 ++-- kernel/bpf/syscall.c | 4 +- kernel/delayacct.c | 5 +- kernel/events/callchain.c | 2 +- kernel/events/core.c | 9 ++- kernel/fork.c | 2 +- kernel/hung_task.c | 7 +- kernel/kexec_core.c | 2 +- kernel/kprobes.c | 2 +- kernel/latencytop.c | 5 +- kernel/pid_namespace.c | 4 +- kernel/pid_sysctl.h | 2 +- kernel/printk/internal.h | 2 +- kernel/printk/printk.c | 2 +- kernel/printk/sysctl.c | 6 +- kernel/sched/core.c | 15 ++-- kernel/sched/rt.c | 20 +++--- kernel/sched/topology.c | 6 +- kernel/seccomp.c | 7 +- kernel/stackleak.c | 12 ++-- kernel/sysctl.c | 109 ++++++++++++++++-------------- kernel/time/timer.c | 4 +- kernel/trace/ftrace.c | 2 +- kernel/trace/trace.c | 2 +- kernel/trace/trace_events_user.c | 3 +- kernel/trace/trace_stack.c | 2 +- kernel/umh.c | 4 +- kernel/utsname_sysctl.c | 6 +- kernel/watchdog.c | 15 ++-- mm/compaction.c | 17 +++-- mm/hugetlb.c | 20 +++--- mm/page-writeback.c | 27 +++++--- mm/page_alloc.c | 43 ++++++++---- mm/util.c | 15 ++-- mm/vmstat.c | 6 +- net/bridge/br_netfilter_hooks.c | 2 +- net/core/neighbour.c | 26 ++++--- net/core/sysctl_net_core.c | 24 ++++--- net/ipv4/devinet.c | 6 +- net/ipv4/route.c | 4 +- net/ipv4/sysctl_net_ipv4.c | 40 ++++++----- net/ipv6/addrconf.c | 38 ++++++----- net/ipv6/ndisc.c | 7 +- net/ipv6/route.c | 4 +- net/ipv6/sysctl_net_ipv6.c | 6 +- net/mpls/af_mpls.c | 4 +- net/netfilter/ipvs/ip_vs_ctl.c | 19 +++--- net/netfilter/nf_conntrack_standalone.c | 2 +- net/netfilter/nf_hooks_lwtunnel.c | 2 +- net/netfilter/nf_log.c | 4 +- net/phonet/sysctl.c | 2 +- net/rds/tcp.c | 4 +- net/sctp/sysctl.c | 30 ++++---- net/sunrpc/sysctl.c | 5 +- net/sunrpc/xprtrdma/svc_rdma.c | 2 +- security/apparmor/lsm.c | 2 +- security/min_addr.c | 2 +- security/yama/yama_lsm.c | 2 +- 93 files changed, 467 insertions(+), 376 deletions(-) --- base-commit: a1e7655b77e3391b58ac28256789ea45b1685abb change-id: 20231226-sysctl-const-handler-883b5eba7e80 Best regards,