From 3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d Mon Sep 17 00:00:00 2001
From: Kees Cook <kees+treewide@kernel.org>
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 <kees+treewide@kernel.org>
---
 arch/arm/mm/fault.h | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)
 create mode 100644 arch/arm/mm/fault.h

(limited to 'arch/arm/mm/fault.h')

diff --git a/arch/arm/mm/fault.h b/arch/arm/mm/fault.h
new file mode 100644
index 000000000..207f1b069
--- /dev/null
+++ b/arch/arm/mm/fault.h
@@ -0,0 +1,75 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ARCH_ARM_FAULT_H
+#define __ARCH_ARM_FAULT_H
+
+/*
+ * Fault status register encodings.  We steal bit 31 for our own purposes.
+ */
+#define FSR_LNX_PF		BIT(31)
+#define FSR_CM			BIT(13)
+#define FSR_WRITE		BIT(11)
+
+#ifdef CONFIG_ARM_LPAE
+#define FSR_FS_AEA		17
+#define FS_TRANS_NOLL		0x4
+#define FS_PERM_NOLL		0xC
+#define FS_MMU_NOLL_MASK	0x3C
+
+#define FSR_FS5_0		GENMASK(5, 0)
+
+static inline int fsr_fs(unsigned int fsr)
+{
+	return fsr & FSR_FS5_0;
+}
+
+static inline bool is_translation_fault(unsigned int fsr)
+{
+	int fs = fsr_fs(fsr);
+
+	return (fs & FS_MMU_NOLL_MASK) == FS_TRANS_NOLL;
+}
+
+static inline bool is_permission_fault(unsigned int fsr)
+{
+	int fs = fsr_fs(fsr);
+
+	return (fs & FS_MMU_NOLL_MASK) == FS_PERM_NOLL;
+}
+#else
+#define FSR_FS_AEA		22
+#define FS_L1_TRANS		0x5
+#define FS_L2_TRANS		0x7
+#define FS_L1_PERM		0xD
+#define FS_L2_PERM		0xF
+
+#define FSR_FS4			BIT(10)
+#define FSR_FS3_0		GENMASK(3, 0)
+
+static inline int fsr_fs(unsigned int fsr)
+{
+	return (fsr & FSR_FS3_0) | (fsr & FSR_FS4) >> 6;
+}
+
+static inline bool is_translation_fault(unsigned int fsr)
+{
+	int fs = fsr_fs(fsr);
+
+	return fs == FS_L1_TRANS || fs == FS_L2_TRANS;
+}
+
+static inline bool is_permission_fault(unsigned int fsr)
+{
+	int fs = fsr_fs(fsr);
+
+	return fs == FS_L1_PERM || fs == FS_L2_PERM;
+}
+#endif
+
+void do_bad_area(unsigned long addr, unsigned int fsr, struct pt_regs *regs);
+void early_abt_enable(void);
+asmlinkage void do_DataAbort(unsigned long addr, unsigned int fsr,
+			     struct pt_regs *regs);
+asmlinkage void do_PrefetchAbort(unsigned long addr, unsigned int ifsr,
+				 struct pt_regs *regs);
+
+#endif	/* __ARCH_ARM_FAULT_H */
-- 
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