[PATCH 00/11] sysctl: treewide: constify ctl_table argument of sysctl handlers

[Thomas Weißschuh]

* 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 <linux at weissschuh.net>
---
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,
-- 
Thomas Weißschuh <linux at weissschuh.net>