kernel/linux.git/arch/parisc/lib/memcpy.c, branch linux-7.0.y

parisc: Remove spurious if statement from raw_copy_from_user()

2025-10-07T14:44:29+00:00

Accidently introduced in commit 91428ca9320e. Signed-off-by: John David Anglin Signed-off-by: Helge Deller Fixes: 91428ca9320e ("parisc: Check region is readable by user in raw_copy_from_user()") Cc: stable@vger.kernel.org # v5.12+

parisc: Check region is readable by user in raw_copy_from_user()

2025-07-25T20:45:23+00:00

Because of the way the _PAGE_READ is handled in the parisc PTE, an access interruption is not generated when the kernel reads from a region where the _PAGE_READ is zero. The current code was written assuming read access faults would also occur in the kernel. This change adds user access checks to raw_copy_from_user(). The prober_user() define checks whether user code has read access to a virtual address. Note that page faults are not handled in the exception support for the probe instruction. For this reason, we precede the probe by a ldb access check. Signed-off-by: John David Anglin Signed-off-by: Helge Deller Cc: stable@vger.kernel.org # v5.12+

parisc: Use constants to encode the space registers like SR_KERNEL

2022-03-11T18:49:31+00:00

Use the provided space register constants instead of hardcoded values. Signed-off-by: Helge Deller

arch: remove compat_alloc_user_space

2021-09-08T22:32:35+00:00

All users of compat_alloc_user_space() and copy_in_user() have been removed from the kernel, only a few functions in sparc remain that can be changed to calling arch_copy_in_user() instead. Link: https://lkml.kernel.org/r/20210727144859.4150043-7-arnd@kernel.org Signed-off-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Cc: Al Viro Cc: Benjamin Herrenschmidt Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Christoph Hellwig Cc: "David S. Miller" Cc: Eric Biederman Cc: Feng Tang Cc: Heiko Carstens Cc: Helge Deller Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: "James E.J. Bottomley" Cc: Michael Ellerman Cc: Paul Mackerras Cc: Thomas Bogendoerfer Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Will Deacon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault

2020-06-17T17:57:41+00:00

Better describe what these functions do. Suggested-by: Linus Torvalds Signed-off-by: Christoph Hellwig Signed-off-by: Linus Torvalds

maccess: always use strict semantics for probe_kernel_read

2020-06-09T16:39:15+00:00

Except for historical confusion in the kprobes/uprobes and bpf tracers, which has been fixed now, there is no good reason to ever allow user memory accesses from probe_kernel_read. Switch probe_kernel_read to only read from kernel memory. [akpm@linux-foundation.org: update it for "mm, dump_page(): do not crash with invalid mapping pointer"] Signed-off-by: Christoph Hellwig Signed-off-by: Andrew Morton Cc: Alexei Starovoitov Cc: Daniel Borkmann Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Masami Hiramatsu Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/20200521152301.2587579-17-hch@lst.de Signed-off-by: Linus Torvalds

maccess: unify the probe kernel arch hooks

2020-06-09T16:39:15+00:00

Currently architectures have to override every routine that probes kernel memory, which includes a pure read and strcpy, both in strict and not strict variants. Just provide a single arch hooks instead to make sure all architectures cover all the cases. [akpm@linux-foundation.org: fix !CONFIG_X86_64 build] Signed-off-by: Christoph Hellwig Signed-off-by: Andrew Morton Cc: Alexei Starovoitov Cc: Daniel Borkmann Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Masami Hiramatsu Cc: Thomas Gleixner Link: http://lkml.kernel.org/r/20200521152301.2587579-11-hch@lst.de Signed-off-by: Linus Torvalds

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 153

2019-05-30T18:26:32+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 675 mass ave cambridge ma 02139 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 77 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Reviewed-by: Armijn Hemel Reviewed-by: Richard Fontana Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.837555891@linutronix.de Signed-off-by: Greg Kroah-Hartman

parisc: Drop exception_data struct

2017-08-22T14:34:33+00:00

Signed-off-by: Helge Deller

parisc: switch to RAW_COPY_USER

2017-04-02T16:07:21+00:00

... and remove dead declarations, while we are at it Signed-off-by: Al Viro