linux-stable.git/arch/mips/kernel/ptrace.c, branch linux-rolling-stable

MIPS: ptrace: Use USER_REGSET_NOTE_TYPE() to specify regset note names

2025-07-15T05:27:47+00:00

Instead of having the core code guess the note name for each regset,
use USER_REGSET_NOTE_TYPE() to pick the correct name from elf.h.

Signed-off-by: Dave Martin 
Cc: Thomas Bogendoerfer 
Cc: Oleg Nesterov 
Cc: Kees Cook 
Cc: Akihiko Odaki 
Cc: linux-mips@vger.kernel.org
Reviewed-by: Akihiko Odaki 
Link: https://lore.kernel.org/r/20250701135616.29630-12-Dave.Martin@arm.com
Signed-off-by: Kees Cook

mips: ptrace: Improve code formatting and indentation

2025-04-27T07:46:21+00:00

Use tabs instead of spaces in regs_query_register_offset() and
syscall_trace_leave(), and properly indent multiple getters.

Signed-off-by: Thorsten Blum 
Reviewed-by: Philippe Mathieu-Daudé 
Signed-off-by: Thomas Bogendoerfer

seccomp/mips: change syscall_trace_enter() to use secure_computing()

2025-02-10T17:26:22+00:00

arch/mips/Kconfig selects HAVE_ARCH_SECCOMP_FILTER so syscall_trace_enter()
can just use __secure_computing(NULL) and rely on populate_seccomp_data(sd)
and "sd == NULL" checks in __secure_computing(sd) paths.

With the change above syscall_trace_enter() can just use secure_computing()
and avoid #ifdef + test_thread_flag(TIF_SECCOMP). CONFIG_GENERIC_ENTRY is
not defined, so test_syscall_work(SECCOMP) will check TIF_SECCOMP.

Signed-off-by: Oleg Nesterov 
Acked-by: Thomas Bogendoerfer 
Reviewed-by: Kees Cook 
Link: https://lore.kernel.org/r/20250128150300.GA15318@redhat.com
Signed-off-by: Kees Cook

MIPS: scall: Save thread_info.syscall unconditionally on entry

2024-04-09T14:52:21+00:00

thread_info.syscall is used by syscall_get_nr to supply syscall nr
over a thread stack frame.

Previously, thread_info.syscall is only saved at syscall_trace_enter
when syscall tracing is enabled. However rest of the kernel code do
expect syscall_get_nr to be available without syscall tracing. The
previous design breaks collect_syscall.

Move saving process to syscall entry to fix it.

Reported-by: Xi Ruoyao 
Link: https://github.com/util-linux/util-linux/issues/2867
Signed-off-by: Jiaxun Yang 
Signed-off-by: Thomas Bogendoerfer

ptrace: Introduce exception_ip arch hook

2024-02-12T22:04:34+00:00

On architectures with delay slot, architecture level instruction
pointer (or program counter) in pt_regs may differ from where
exception was triggered.

Introduce exception_ip hook to invoke architecture code and determine
actual instruction pointer to the exception.

Link: https://lore.kernel.org/lkml/00d1b813-c55f-4365-8d81-d70258e10b16@app.fastmail.com/
Signed-off-by: Jiaxun Yang 
Signed-off-by: Thomas Bogendoerfer

mips: ptrace: user_regset_copyin_ignore() always returns 0

2022-11-15T22:30:40+00:00

user_regset_copyin_ignore() always returns 0, so checking its result seems
pointless -- don't do this anymore...

Link: https://lkml.kernel.org/r/20221014212235.10770-7-s.shtylyov@omp.ru
Signed-off-by: Sergey Shtylyov 
Cc: Brian Cain 
Cc: Catalin Marinas 
Cc: Christophe Leroy 
Cc: David S. Miller 
Cc: Dinh Nguyen 
Cc: Helge Deller 
Cc: James Bottomley 
Cc: Jonas Bonn 
Cc: Michael Ellerman 
Cc: Nicholas Piggin 
Cc: Oleg Nesterov 
Cc: Rich Felker 
Cc: Russell King 
Cc: Stafford Horne 
Cc: Stefan Kristiansson 
Cc: Thomas Bogendoerfer 
Cc: Will Deacon 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton

ptrace: Create ptrace_report_syscall_{entry,exit} in ptrace.h

2022-03-10T19:35:08+00:00

Rename tracehook_report_syscall_{entry,exit} to
ptrace_report_syscall_{entry,exit} and place them in ptrace.h

There is no longer any generic tracehook infractructure so make
these ptrace specific functions ptrace specific.

Reviewed-by: Kees Cook 
Link: https://lkml.kernel.org/r/20220309162454.123006-3-ebiederm@xmission.com
Signed-off-by: "Eric W. Biederman"

mips: switch to ->regset_get()

2020-07-27T18:31:08+00:00

Signed-off-by: Al Viro

mm: don't include asm/pgtable.h if linux/mm.h is already included

2020-06-09T16:39:13+00:00

Patch series "mm: consolidate definitions of page table accessors", v2.

The low level page table accessors (pXY_index(), pXY_offset()) are
duplicated across all architectures and sometimes more than once.  For
instance, we have 31 definition of pgd_offset() for 25 supported
architectures.

Most of these definitions are actually identical and typically it boils
down to, e.g.

static inline unsigned long pmd_index(unsigned long address)
{
        return (address >> PMD_SHIFT) & (PTRS_PER_PMD - 1);
}

static inline pmd_t *pmd_offset(pud_t *pud, unsigned long address)
{
        return (pmd_t *)pud_page_vaddr(*pud) + pmd_index(address);
}

These definitions can be shared among 90% of the arches provided
XYZ_SHIFT, PTRS_PER_XYZ and xyz_page_vaddr() are defined.

For architectures that really need a custom version there is always
possibility to override the generic version with the usual ifdefs magic.

These patches introduce include/linux/pgtable.h that replaces
include/asm-generic/pgtable.h and add the definitions of the page table
accessors to the new header.

This patch (of 12):

The linux/mm.h header includes  to allow inlining of the
functions involving page table manipulations, e.g.  pte_alloc() and
pmd_alloc().  So, there is no point to explicitly include 
in the files that include .

The include statements in such cases are remove with a simple loop:

	for f in $(git grep -l "include ") ; do
		sed -i -e '/include / d' $f
	done

Signed-off-by: Mike Rapoport 
Signed-off-by: Andrew Morton 
Cc: Arnd Bergmann 
Cc: Borislav Petkov 
Cc: Brian Cain 
Cc: Catalin Marinas 
Cc: Chris Zankel 
Cc: "David S. Miller" 
Cc: Geert Uytterhoeven 
Cc: Greentime Hu 
Cc: Greg Ungerer 
Cc: Guan Xuetao 
Cc: Guo Ren 
Cc: Heiko Carstens 
Cc: Helge Deller 
Cc: Ingo Molnar 
Cc: Ley Foon Tan 
Cc: Mark Salter 
Cc: Matthew Wilcox 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Michael Ellerman 
Cc: Michal Simek 
Cc: Mike Rapoport 
Cc: Nick Hu 
Cc: Paul Walmsley 
Cc: Richard Weinberger 
Cc: Rich Felker 
Cc: Russell King 
Cc: Stafford Horne 
Cc: Thomas Bogendoerfer 
Cc: Thomas Gleixner 
Cc: Tony Luck 
Cc: Vincent Chen 
Cc: Vineet Gupta 
Cc: Will Deacon 
Cc: Yoshinori Sato 
Link: http://lkml.kernel.org/r/20200514170327.31389-1-rppt@kernel.org
Link: http://lkml.kernel.org/r/20200514170327.31389-2-rppt@kernel.org
Signed-off-by: Linus Torvalds

Merge tag 'audit-pr-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit

2019-05-08T02:06:04+00:00

Pull audit updates from Paul Moore:
 "We've got a reasonably broad set of audit patches for the v5.2 merge
  window, the highlights are below:

   - The biggest change, and the source of all the arch/* changes, is
     the patchset from Dmitry to help enable some of the work he is
     doing around PTRACE_GET_SYSCALL_INFO.

     To be honest, including this in the audit tree is a bit of a
     stretch, but it does help move audit a little further along towards
     proper syscall auditing for all arches, and everyone else seemed to
     agree that audit was a "good" spot for this to land (or maybe they
     just didn't want to merge it? dunno.).

   - We can now audit time/NTP adjustments.

   - We continue the work to connect associated audit records into a
     single event"

* tag 'audit-pr-20190507' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit: (21 commits)
  audit: fix a memory leak bug
  ntp: Audit NTP parameters adjustment
  timekeeping: Audit clock adjustments
  audit: purge unnecessary list_empty calls
  audit: link integrity evm_write_xattrs record to syscall event
  syscall_get_arch: add "struct task_struct *" argument
  unicore32: define syscall_get_arch()
  Move EM_UNICORE to uapi/linux/elf-em.h
  nios2: define syscall_get_arch()
  nds32: define syscall_get_arch()
  Move EM_NDS32 to uapi/linux/elf-em.h
  m68k: define syscall_get_arch()
  hexagon: define syscall_get_arch()
  Move EM_HEXAGON to uapi/linux/elf-em.h
  h8300: define syscall_get_arch()
  c6x: define syscall_get_arch()
  arc: define syscall_get_arch()
  Move EM_ARCOMPACT and EM_ARCV2 to uapi/linux/elf-em.h
  audit: Make audit_log_cap and audit_copy_inode static
  audit: connect LOGIN record to its syscall record
  ...