treewide: refresh kmalloc_obj() conversionsgrafted

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 <kees+treewide@kernel.org>

1 files changed, 75 insertions, 0 deletions

diff --git a/arch/x86/boot/pmjump.S b/arch/x86/boot/pmjump.S
new file mode 100644
index 000000000..cbec8bd08
--- /dev/null
+++ b/arch/x86/boot/pmjump.S
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright (C) 1991, 1992 Linus Torvalds
+ *   Copyright 2007 rPath, Inc. - All Rights Reserved
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * The actual transition into protected mode
+ */
+
+#include <asm/boot.h>
+#include <asm/processor-flags.h>
+#include <asm/segment.h>
+#include <linux/linkage.h>
+
+	.text
+	.code16
+
+/*
+ * void protected_mode_jump(u32 entrypoint, u32 bootparams);
+ */
+SYM_FUNC_START_NOALIGN(protected_mode_jump)
+	movl	%edx, %esi		# Pointer to boot_params table
+
+	xorl	%ebx, %ebx
+	movw	%cs, %bx
+	shll	$4, %ebx
+	addl	%ebx, 2f
+	jmp	1f			# Short jump to serialize on 386/486
+1:
+
+	movw	$__BOOT_DS, %cx
+	movw	$__BOOT_TSS, %di
+
+	movl	%cr0, %edx
+	orb	$X86_CR0_PE, %dl	# Protected mode
+	movl	%edx, %cr0
+
+	# Transition to 32-bit mode
+	.byte	0x66, 0xea		# ljmpl opcode
+2:	.long	.Lin_pm32		# offset
+	.word	__BOOT_CS		# segment
+SYM_FUNC_END(protected_mode_jump)
+
+	.code32
+	.section ".text32","ax"
+SYM_FUNC_START_LOCAL_NOALIGN(.Lin_pm32)
+	# Set up data segments for flat 32-bit mode
+	movl	%ecx, %ds
+	movl	%ecx, %es
+	movl	%ecx, %fs
+	movl	%ecx, %gs
+	movl	%ecx, %ss
+	# The 32-bit code sets up its own stack, but this way we do have
+	# a valid stack if some debugging hack wants to use it.
+	addl	%ebx, %esp
+
+	# Set up TR to make Intel VT happy
+	ltr	%di
+
+	# Clear registers to allow for future extensions to the
+	# 32-bit boot protocol
+	xorl	%ecx, %ecx
+	xorl	%edx, %edx
+	xorl	%ebx, %ebx
+	xorl	%ebp, %ebp
+	xorl	%edi, %edi
+
+	# Set up LDTR to make Intel VT happy
+	lldt	%cx
+
+	jmpl	*%eax			# Jump to the 32-bit entrypoint
+SYM_FUNC_END(.Lin_pm32)