[GIT PULL] sysctl constification changes for v6.11-rc1

[GIT PULL] sysctl constification changes for v6.11-rc1

[Joel Granados]

Linus

Constifying ctl_table structs will prevent the modification of
proc_handler function pointers as they would reside in .rodata. To get
there, the proc_handler arguments must first be const qualified which
requires this (fairly large) treewide PR. Sending it in the tail end of
of the merge window after a suggestion from Kees to avoid unneeded merge
conflicts. It has been rebased on top of 7a3fad30fd8b4b5e370906b3c554f64026f56c2f.
I can send it later if it makes more sense on your side; please tell me
what you prefer.

This PR applies on top of what I see as your latest master, but if you
need to generate it, you can do so by executing two commands:
1. Semantic patch: The coccinelle script is here [1]
  `make coccicheck MODE=patch SPFLAGS="--in-place --include-headers --smpl-spacing" COCCI=COCCI_SCRIPT`
2. Sed command: The sed script is here [2]
  `sed --in-place -f SED_SCRIPT fs/xfs/xfs_sysctl.c kernel/watchdog.c`
This is my first time sending out a semantic patch, so get back to me if
you have issues or prefer some other way of receiving it.

Testing was done in sysctl-testing (0-day) to avoid generating
unnecessary merge conflicts in linux-next. I do not expect any
error/regression given that all changes contained in this PR are
non-functional.

[1]
```
virtual patch

@r1@
identifier ctl, write, buffer, lenp, ppos;
identifier func !~ "appldata_(timer|interval)_handler|sched_(rt|rr)_handler|rds_tcp_skbuf_handler|proc_sctp_do_(hmac_alg|rto_min|rto_max|udp_port|alpha_beta|auth|probe_interval)";
@@

int func(
- struct ctl_table *ctl
+ const struct ctl_table *ctl
  ,int write, void *buffer, size_t *lenp, loff_t *ppos);

@r2@
identifier func, ctl, write, buffer, lenp, ppos;
@@

int func(
- struct ctl_table *ctl
+ const struct ctl_table *ctl
  ,int write, void *buffer, size_t *lenp, loff_t *ppos)
{ ... }

@r3@
identifier func;
@@

int func(
- struct ctl_table *
+ const struct ctl_table *
  ,int , void *, size_t *, loff_t *);

@r4@
identifier func, ctl;
@@

int func(
- struct ctl_table *ctl
+ const struct ctl_table *ctl
  ,int , void *, size_t *, loff_t *);

@r5@
identifier func, write, buffer, lenp, ppos;
@@

int func(
- struct ctl_table *
+ const struct ctl_table *
  ,int write, void *buffer, size_t *lenp, loff_t *ppos);
```

[2]
```
s/^xfs_stats_clear_proc_handler(const struct ctl_table \*ctl,$/xfs_stats_clear_proc_handler(\
\tconst struct ctl_table\t*ctl,/
s/^xfs_panic_mask_proc_handler(const struct ctl_table \*ctl,$/xfs_panic_mask_proc_handler(\
\tconst struct ctl_table\t*ctl,/
s/^xfs_deprecated_dointvec_minmax(const struct ctl_table \*ctl,$/xfs_deprecated_dointvec_minmax(\
\tconst struct ctl_table\t*ctl,/
s/proc_watchdog_common(int which, struct ctl_table \*table/proc_watchdog_common(int which, const struct ctl_table *table/
```

The following changes since commit 7a3fad30fd8b4b5e370906b3c554f64026f56c2f:

  Merge tag 'random-6.11-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random (2024-07-24 10:29:50 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl.git/ tags/constfy-sysctl-6.11-rc1

for you to fetch changes up to 78eb4ea25cd5fdbdae7eb9fdf87b99195ff67508:

  sysctl: treewide: constify the ctl_table argument of proc_handlers (2024-07-24 20:59:29 +0200)

----------------------------------------------------------------
sysctl: treewide: constify the ctl_table argument of proc_handlers

Summary
- const qualify struct ctl_table args in proc_handlers:
  This is a prerequisite to moving the static ctl_table structs into .rodata
  data which will ensure that proc_handler function pointers cannot be
  modified.

----------------------------------------------------------------
Joel Granados (1):
      sysctl: treewide: constify the ctl_table argument of proc_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                     |  4 +-
 drivers/char/random.c                     |  4 +-
 drivers/macintosh/mac_hid.c               |  2 +-
 drivers/net/vrf.c                         |  2 +-
 drivers/parport/procfs.c                  | 12 +++---
 drivers/perf/arm_pmuv3.c                  |  2 +-
 drivers/perf/riscv_pmu_sbi.c              |  2 +-
 fs/coredump.c                             |  2 +-
 fs/dcache.c                               |  2 +-
 fs/drop_caches.c                          |  2 +-
 fs/exec.c                                 |  2 +-
 fs/file_table.c                           |  2 +-
 fs/fs-writeback.c                         |  2 +-
 fs/inode.c                                |  2 +-
 fs/pipe.c                                 |  2 +-
 fs/quota/dquot.c                          |  2 +-
 fs/xfs/xfs_sysctl.c                       |  6 +--
 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                    | 34 ++++++++--------
 include/linux/vmstat.h                    |  4 +-
 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                          |  6 +--
 kernel/bpf/syscall.c                      |  4 +-
 kernel/delayacct.c                        |  2 +-
 kernel/events/callchain.c                 |  2 +-
 kernel/events/core.c                      |  4 +-
 kernel/fork.c                             |  2 +-
 kernel/hung_task.c                        |  2 +-
 kernel/kexec_core.c                       |  2 +-
 kernel/kprobes.c                          |  2 +-
 kernel/latencytop.c                       |  2 +-
 kernel/pid_namespace.c                    |  2 +-
 kernel/pid_sysctl.h                       |  2 +-
 kernel/printk/internal.h                  |  2 +-
 kernel/printk/printk.c                    |  2 +-
 kernel/printk/sysctl.c                    |  2 +-
 kernel/sched/core.c                       |  6 +--
 kernel/sched/rt.c                         |  8 ++--
 kernel/sched/topology.c                   |  2 +-
 kernel/seccomp.c                          |  2 +-
 kernel/stackleak.c                        |  2 +-
 kernel/sysctl.c                           | 64 +++++++++++++++----------------
 kernel/time/timer.c                       |  2 +-
 kernel/trace/ftrace.c                     |  2 +-
 kernel/trace/trace.c                      |  2 +-
 kernel/trace/trace_events_user.c          |  2 +-
 kernel/trace/trace_stack.c                |  2 +-
 kernel/umh.c                              |  2 +-
 kernel/utsname_sysctl.c                   |  2 +-
 kernel/watchdog.c                         | 12 +++---
 mm/compaction.c                           |  6 +--
 mm/hugetlb.c                              |  6 +--
 mm/page-writeback.c                       | 10 ++---
 mm/page_alloc.c                           | 14 +++----
 mm/util.c                                 |  6 +--
 mm/vmstat.c                               |  4 +-
 net/bridge/br_netfilter_hooks.c           |  2 +-
 net/core/neighbour.c                      | 18 ++++-----
 net/core/sysctl_net_core.c                | 20 +++++-----
 net/ipv4/devinet.c                        |  6 +--
 net/ipv4/route.c                          |  2 +-
 net/ipv4/sysctl_net_ipv4.c                | 30 +++++++--------
 net/ipv6/addrconf.c                       | 16 ++++----
 net/ipv6/ndisc.c                          |  2 +-
 net/ipv6/route.c                          |  2 +-
 net/ipv6/sysctl_net_ipv6.c                |  4 +-
 net/mpls/af_mpls.c                        |  4 +-
 net/mptcp/ctrl.c                          |  4 +-
 net/netfilter/ipvs/ip_vs_ctl.c            | 12 +++---
 net/netfilter/nf_conntrack_standalone.c   |  2 +-
 net/netfilter/nf_hooks_lwtunnel.c         |  2 +-
 net/netfilter/nf_log.c                    |  2 +-
 net/phonet/sysctl.c                       |  2 +-
 net/rds/tcp.c                             |  4 +-
 net/sctp/sysctl.c                         | 28 +++++++-------
 net/sunrpc/sysctl.c                       |  4 +-
 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, 258 insertions(+), 258 deletions(-)

-- 

Joel Granados

Re: [GIT PULL] sysctl constification changes for v6.11-rc1

[Linus Torvalds]

On Wed, 24 Jul 2024 at 14:00, Joel Granados <j.granados@samsung.com> wrote:
>
> This is my first time sending out a semantic patch, so get back to me if
> you have issues or prefer some other way of receiving it.

Looks fine to me.

Sometimes if it's just a pure scripting change, people send me the
script itself and just ask me to run it as a final thing before the
rc1 release or something like that.

But since in practice there's almost always some additional manual
cleanup, doing it this way with the script documented in the commit is
typically the right way to go.

This time it was details like whitespace alignment, sometimes it's
"the script did 95%, but there was another call site that also needed
updating", or just a documentation update to go in together with the
change or whatever.

Anyway, pulled and just going through my build tests now.

              Linus

Re: [GIT PULL] sysctl constification changes for v6.11-rc1

[pr-tracker-bot]

The pull request you sent on Wed, 24 Jul 2024 23:00:14 +0200:

> git://git.kernel.org/pub/scm/linux/kernel/git/sysctl/sysctl.git/ tags/constfy-sysctl-6.11-rc1

has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/b485625078cab3b824a84ce185b6e73733704b5b

Thank you!

-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/prtracker.html

Re: [GIT PULL] sysctl constification changes for v6.11-rc1

[patchwork-bot+linux-riscv]

Hello:

This pull request was applied to riscv/linux.git (fixes)
by Linus Torvalds <torvalds@linux-foundation.org>:

On Wed, 24 Jul 2024 23:00:14 +0200 you wrote:
> Linus
> 
> Constifying ctl_table structs will prevent the modification of
> proc_handler function pointers as they would reside in .rodata. To get
> there, the proc_handler arguments must first be const qualified which
> requires this (fairly large) treewide PR. Sending it in the tail end of
> of the merge window after a suggestion from Kees to avoid unneeded merge
> conflicts. It has been rebased on top of 7a3fad30fd8b4b5e370906b3c554f64026f56c2f.
> I can send it later if it makes more sense on your side; please tell me
> what you prefer.
> 
> [...]

Here is the summary with links:
  - [GIT,PULL] sysctl constification changes for v6.11-rc1
    https://git.kernel.org/riscv/c/f8a8b94d0698

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html

Re: [GIT PULL] sysctl constification changes for v6.11-rc1

[patchwork-bot+linux-riscv]

Hello:

This pull request was applied to riscv/linux.git (for-next)
by Linus Torvalds <torvalds@linux-foundation.org>:

On Wed, 24 Jul 2024 23:00:14 +0200 you wrote:
> Linus
> 
> Constifying ctl_table structs will prevent the modification of
> proc_handler function pointers as they would reside in .rodata. To get
> there, the proc_handler arguments must first be const qualified which
> requires this (fairly large) treewide PR. Sending it in the tail end of
> of the merge window after a suggestion from Kees to avoid unneeded merge
> conflicts. It has been rebased on top of 7a3fad30fd8b4b5e370906b3c554f64026f56c2f.
> I can send it later if it makes more sense on your side; please tell me
> what you prefer.
> 
> [...]

Here is the summary with links:
  - [GIT,PULL] sysctl constification changes for v6.11-rc1
    https://git.kernel.org/riscv/c/b485625078ca

You are awesome, thank you!
-- 
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html