From 3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Wed, 2 Sep 2026 15:31:14 -0700 Subject: treewide: refresh kmalloc_obj() conversions This is another run of the Coccinelle script for converting kmalloc() family of allocations to kmalloc_obj() via the existing rules in scripts/coccinelle/api/kmalloc_objs.cocci This catches both the set of kmalloc() uses added since the first kmalloc_obj() conversions in v7.0 and adds a large group missed in the first pass due to Coccinelle not interacting well with the cleanup.h scoped_...() family of macros[1]. I worked around this with spatch's "--macro-file" argument to a file with all the scoped_...() macros mapped to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control flow indicator I could find. Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc, riscv, and s390 with no new warnings. Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1] Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2] Signed-off-by: Kees Cook --- arch/hexagon/mm/uaccess.c | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 arch/hexagon/mm/uaccess.c (limited to 'arch/hexagon/mm/uaccess.c') diff --git a/arch/hexagon/mm/uaccess.c b/arch/hexagon/mm/uaccess.c new file mode 100644 index 000000000..3204e9ba6 --- /dev/null +++ b/arch/hexagon/mm/uaccess.c @@ -0,0 +1,37 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved. + */ + +/* + * Support for user memory access from kernel. This will + * probably be inlined for performance at some point, but + * for ease of debug, and to a lesser degree for code size, + * we implement here as subroutines. + */ +#include +#include +#include + +/* + * For clear_user(), exploit previously defined copy_to_user function + * and the fact that we've got a handy zero page defined in kernel/head.S + * + * dczero here would be even faster. + */ +__kernel_size_t __clear_user_hexagon(void __user *dest, unsigned long count) +{ + long uncleared; + + while (count > PAGE_SIZE) { + uncleared = raw_copy_to_user(dest, &empty_zero_page, PAGE_SIZE); + if (uncleared) + return count - (PAGE_SIZE - uncleared); + count -= PAGE_SIZE; + dest += PAGE_SIZE; + } + if (count) + count = raw_copy_to_user(dest, &empty_zero_page, count); + + return count; +} -- cgit v1.3.1