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

Thomas Weißschuh
2024-03-15T20:48:21Z

* 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@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@weissschuh.net>