linux.git/include/linux/moduleparam.h, branch v7.1-rc2

module: Remove extern keyword from param prototypes

2026-03-18T21:43:19+00:00

The external function declarations do not need the "extern" keyword. Remove
it to align with the Linux kernel coding style and to silence the
associated checkpatch warnings.

Signed-off-by: Petr Pavlu 
Signed-off-by: Sami Tolvanen

module: Clean up parse_args() arguments

2026-03-18T21:43:18+00:00

* Use the preferred `unsigned int` over plain `unsigned` for the `num`
  parameter.
* Synchronize the parameter names in moduleparam.h with the ones used by
  the implementation in params.c.

Signed-off-by: Petr Pavlu 
Signed-off-by: Sami Tolvanen

module: Fix freeing of charp module parameters when CONFIG_SYSFS=n

2026-03-18T21:43:18+00:00

When setting a charp module parameter, the param_set_charp() function
allocates memory to store a copy of the input value. Later, when the module
is potentially unloaded, the destroy_params() function is called to free
this allocated memory.

However, destroy_params() is available only when CONFIG_SYSFS=y, otherwise
only a dummy variant is present. In the unlikely case that the kernel is
configured with CONFIG_MODULES=y and CONFIG_SYSFS=n, this results in
a memory leak of charp values when a module is unloaded.

Fix this issue by making destroy_params() always available when
CONFIG_MODULES=y. Rename the function to module_destroy_params() to clarify
that it is intended for use by the module loader.

Fixes: e180a6b7759a ("param: fix charp parameters set via sysfs")
Signed-off-by: Petr Pavlu 
Signed-off-by: Sami Tolvanen

Merge tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2026-02-12T20:13:01+00:00

Pull non-MM updates from Andrew Morton:

 - "ocfs2: give ocfs2 the ability to reclaim suballocator free bg" saves
   disk space by teaching ocfs2 to reclaim suballocator block group
   space (Heming Zhao)

 - "Add ARRAY_END(), and use it to fix off-by-one bugs" adds the
   ARRAY_END() macro and uses it in various places (Alejandro Colomar)

 - "vmcoreinfo: support VMCOREINFO_BYTES larger than PAGE_SIZE" makes
   the vmcore code future-safe, if VMCOREINFO_BYTES ever exceeds the
   page size (Pnina Feder)

 - "kallsyms: Prevent invalid access when showing module buildid" cleans
   up kallsyms code related to module buildid and fixes an invalid
   access crash when printing backtraces (Petr Mladek)

 - "Address page fault in ima_restore_measurement_list()" fixes a
   kexec-related crash that can occur when booting the second-stage
   kernel on x86 (Harshit Mogalapalli)

 - "kho: ABI headers and Documentation updates" updates the kexec
   handover ABI documentation (Mike Rapoport)

 - "Align atomic storage" adds the __aligned attribute to atomic_t and
   atomic64_t definitions to get natural alignment of both types on
   csky, m68k, microblaze, nios2, openrisc and sh (Finn Thain)

 - "kho: clean up page initialization logic" simplifies the page
   initialization logic in kho_restore_page() (Pratyush Yadav)

 - "Unload linux/kernel.h" moves several things out of kernel.h and into
   more appropriate places (Yury Norov)

 - "don't abuse task_struct.group_leader" removes the usage of
   ->group_leader when it is "obviously unnecessary" (Oleg Nesterov)

 - "list private v2 & luo flb" adds some infrastructure improvements to
   the live update orchestrator (Pasha Tatashin)

* tag 'mm-nonmm-stable-2026-02-12-10-48' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (107 commits)
  watchdog/hardlockup: simplify perf event probe and remove per-cpu dependency
  procfs: fix missing RCU protection when reading real_parent in do_task_stat()
  watchdog/softlockup: fix sample ring index wrap in need_counting_irqs()
  kcsan, compiler_types: avoid duplicate type issues in BPF Type Format
  kho: fix doc for kho_restore_pages()
  tests/liveupdate: add in-kernel liveupdate test
  liveupdate: luo_flb: introduce File-Lifecycle-Bound global state
  liveupdate: luo_file: Use private list
  list: add kunit test for private list primitives
  list: add primitives for private list manipulations
  delayacct: fix uapi timespec64 definition
  panic: add panic_force_cpu= parameter to redirect panic to a specific CPU
  netclassid: use thread_group_leader(p) in update_classid_task()
  RDMA/umem: don't abuse current->group_leader
  drm/pan*: don't abuse current->group_leader
  drm/amd: kill the outdated "Only the pthreads threading model is supported" checks
  drm/amdgpu: don't abuse current->group_leader
  android/binder: use same_thread_group(proc->tsk, current) in binder_mmap()
  android/binder: don't abuse current->group_leader
  kho: skip memoryless NUMA nodes when reserving scratch areas
  ...

kernel.h: move VERIFY_OCTAL_PERMISSIONS() to sysfs.h

2026-02-01T00:16:05+00:00

The macro is related to sysfs, but is defined in kernel.h.  Move it to the
proper header, and unload the generic kernel.h.

Now that the macro is removed from kernel.h, linux/moduleparam.h is
decoupled, and kernel.h inclusion can be removed.

Link: https://lkml.kernel.org/r/20260116042510.241009-4-ynorov@nvidia.com
Signed-off-by: Yury Norov 
Acked-by: Randy Dunlap 
Tested-by: Randy Dunlap 
Reviewed-by: Andy Shevchenko 
Reviewed-by: Petr Pavlu 
Acked-by: Greg Kroah-Hartman 
Reviewed-by: Joel Fernandes 
Cc: Aaron Tomlin 
Cc: Andi Shyti 
Cc: Christophe Leroy (CS GROUP) 
Cc: Jani Nikula 
Cc: Steven Rostedt (Google) 
Signed-off-by: Andrew Morton

moduleparam: include required headers explicitly

2026-02-01T00:16:05+00:00

The following patch drops moduleparam.h dependency on kernel.h.  In
preparation to it, list all the required headers explicitly.

Link: https://lkml.kernel.org/r/20260116042510.241009-3-ynorov@nvidia.com
Signed-off-by: Yury Norov 
Suggested-by: Petr Pavlu 
Reviewed-by: Petr Pavlu 
Reviewed-by: Andy Shevchenko 
Reviewed-by: Joel Fernandes 
Cc: Aaron Tomlin 
Cc: Andi Shyti 
Cc: Christophe Leroy (CS GROUP) 
Cc: Greg Kroah-Hartman 
Cc: Jani Nikula 
Cc: Randy Dunlap 
Cc: Steven Rostedt (Google) 
Signed-off-by: Andrew Morton

modules: moduleparam.h: fix kernel-doc comments

2025-12-22T16:35:54+00:00

Fix kernel-doc comments to prevent kernel-doc warnings:

Warning: include/linux/moduleparam.h:364 function parameter 'arg' not
 described in '__core_param_cb'
Warning: include/linux/moduleparam.h:395 No description found for return
 value of 'parameq'
Warning: include/linux/moduleparam.h:405 No description found for return
 value of 'parameqn'

Signed-off-by: Randy Dunlap 
Reviewed-by: Petr Pavlu 
[Sami: Clarified the commit message]
Signed-off-by: Sami Tolvanen

module: Add compile-time check for embedded NUL characters

2025-11-05T13:08:58+00:00

Long ago, the kernel module license checks were bypassed by embedding a
NUL character in the MODULE_LICENSE() string[1]. By using a string like
"GPL\0proprietary text", the kernel would only read "GPL" due to C string
termination at the NUL byte, allowing proprietary modules to avoid kernel
tainting and access GPL-only symbols.

The MODULE_INFO() macro stores these strings in the .modinfo ELF
section, and get_next_modinfo() uses strcmp()-family functions
which stop at the first NUL. This split the embedded string into two
separate .modinfo entries, with only the first part being processed by
license_is_gpl_compatible().

Add a compile-time check using static_assert that compares the full
string length (sizeof - 1) against __builtin_strlen(), which stops at
the first NUL. If they differ, compilation fails with a clear error
message.

While this check can still be circumvented by modifying the ELF binary
post-compilation, it prevents accidental embedded NULs and forces
intentional abuse to require deliberate binary manipulation rather than
simple source-level tricks.

Build tested with test modules containing both valid and invalid license
strings. The check correctly rejects:

    MODULE_LICENSE("GPL\0proprietary")

while accepting normal declarations:

    MODULE_LICENSE("GPL")

Link: https://lwn.net/Articles/82305/ [1]
Suggested-by: Rusty Russell 
Signed-off-by: Kees Cook 
Reviewed-by: Daniel Gomez 
Reviewed-by: Aaron Tomlin 
Reviewed-by: Petr Pavlu 
Tested-by: Daniel Gomez 
Signed-off-by: Daniel Gomez

panic: add note that 'panic_print' parameter is deprecated

2025-09-14T00:32:50+00:00

Just like for 'panic_print's systcl interface, add similar note for setup
of kernel cmdline parameter and parameter under /sys/module/kernel/.

Also add __core_param_cb() macro, which enables to add special get/set
operation for a kernel parameter.

Link: https://lkml.kernel.org/r/20250825025701.81921-4-feng.tang@linux.alibaba.com
Signed-off-by: Feng Tang 
Suggested-by: Petr Mladek 
Reviewed-by: Petr Mladek 
Cc: Askar Safin 
Cc: John Ogness 
Cc: Jonathan Corbet 
Cc: Lance Yang 
Cc: "Paul E . McKenney" 
Cc: Steven Rostedt 
Signed-off-by: Andrew Morton

Merge tag 'kbuild-v6.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

2025-08-06T04:32:52+00:00

Pull Kbuild updates from Masahiro Yamada:
 "This is the last pull request from me.

  I'm grateful to have been able to continue as a maintainer for eight
  years. From the next cycle, Nathan and Nicolas will maintain Kbuild.

   - Fix a shortcut key issue in menuconfig

   - Fix missing rebuild of kheaders

   - Sort the symbol dump generated by gendwarfsyms

   - Support zboot extraction in scripts/extract-vmlinux

   - Migrate gconfig to GTK 3

   - Add TAR variable to allow overriding the default tar command

   - Hand over Kbuild maintainership"

* tag 'kbuild-v6.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (92 commits)
  MAINTAINERS: hand over Kbuild maintenance
  kheaders: make it possible to override TAR
  kbuild: userprogs: use correct linker when mixing clang and GNU ld
  kconfig: lxdialog: replace strcpy() with strncpy() in inputbox.c
  kconfig: lxdialog: replace strcpy with snprintf in print_autowrap
  kconfig: gconf: refactor text_insert_help()
  kconfig: gconf: remove unneeded variable in text_insert_msg
  kconfig: gconf: use hyphens in signals
  kconfig: gconf: replace GtkImageMenuItem with GtkMenuItem
  kconfig: gconf: Fix Back button behavior
  kconfig: gconf: fix single view to display dependent symbols correctly
  scripts: add zboot support to extract-vmlinux
  gendwarfksyms: order -T symtypes output by name
  gendwarfksyms: use preferred form of sizeof for allocation
  kconfig: qconf: confine {begin,end}Group to constructor and destructor
  kconfig: qconf: fix ConfigList::updateListAllforAll()
  kconfig: add a function to dump all menu entries in a tree-like format
  kconfig: gconf: show GTK version in About dialog
  kconfig: gconf: replace GtkHPaned and GtkVPaned with GtkPaned
  kconfig: gconf: replace GdkColor with GdkRGBA
  ...