Merge remote-tracking branch 'stable/linux-6.6.y' into rpi-6.6.y

Makefile

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 6
 PATCHLEVEL = 6
-SUBLEVEL = 59
+SUBLEVEL = 60
 EXTRAVERSION =
 NAME = Pinguïn Aangedreven
 

arch/arm64/boot/dts/freescale/imx8ulp.dtsi

@@ -352,7 +352,7 @@
 			};
 
 			flexspi2: spi@29810000 {
-				compatible = "nxp,imx8mm-fspi";
+				compatible = "nxp,imx8ulp-fspi";
 				reg = <0x29810000 0x10000>, <0x60000000 0x10000000>;
 				reg-names = "fspi_base", "fspi_mmap";
 				#address-cells = <1>;

arch/riscv/kernel/acpi.c

@@ -204,15 +204,15 @@ void __init __iomem *__acpi_map_table(unsigned long phys, unsigned long size)
 	if (!size)
 		return NULL;
 
-	return early_ioremap(phys, size);
+	return early_memremap(phys, size);
 }
 
 void __init __acpi_unmap_table(void __iomem *map, unsigned long size)
 {
 	if (!map || !size)
 		return;
 
-	early_iounmap(map, size);
+	early_memunmap(map, size);
 }
 
 void __iomem *acpi_os_ioremap(acpi_physical_address phys, acpi_size size)

arch/riscv/kernel/asm-offsets.c

@@ -4,8 +4,6 @@
  * Copyright (C) 2017 SiFive
  */
 
-#define GENERATING_ASM_OFFSETS
-
 #include <linux/kbuild.h>
 #include <linux/mm.h>
 #include <linux/sched.h>

arch/riscv/kernel/cpu-hotplug.c

@@ -65,7 +65,7 @@ void arch_cpuhp_cleanup_dead_cpu(unsigned int cpu)
 	if (cpu_ops[cpu]->cpu_is_stopped)
 		ret = cpu_ops[cpu]->cpu_is_stopped(cpu);
 	if (ret)
-		pr_warn("CPU%d may not have stopped: %d\n", cpu, ret);
+		pr_warn("CPU%u may not have stopped: %d\n", cpu, ret);
 }
 
 /*

arch/riscv/kernel/efi-header.S

@@ -64,7 +64,7 @@ extra_header_fields:
 	.long	efi_header_end - _start			// SizeOfHeaders
 	.long	0					// CheckSum
 	.short	IMAGE_SUBSYSTEM_EFI_APPLICATION		// Subsystem
-	.short	0					// DllCharacteristics
+	.short	IMAGE_DLL_CHARACTERISTICS_NX_COMPAT	// DllCharacteristics
 	.quad	0					// SizeOfStackReserve
 	.quad	0					// SizeOfStackCommit
 	.quad	0					// SizeOfHeapReserve

arch/riscv/kernel/traps_misaligned.c

@@ -132,8 +132,6 @@
 #define REG_PTR(insn, pos, regs)	\
 	(ulong *)((ulong)(regs) + REG_OFFSET(insn, pos))
 
-#define GET_RM(insn)			(((insn) >> 12) & 7)
-
 #define GET_RS1(insn, regs)		(*REG_PTR(insn, SH_RS1, regs))
 #define GET_RS2(insn, regs)		(*REG_PTR(insn, SH_RS2, regs))
 #define GET_RS1S(insn, regs)		(*REG_PTR(RVC_RS1S(insn), 0, regs))

arch/riscv/kernel/vdso/Makefile

@@ -18,6 +18,7 @@ obj-vdso = $(patsubst %, %.o, $(vdso-syms)) note.o
 
 ccflags-y := -fno-stack-protector
 ccflags-y += -DDISABLE_BRANCH_PROFILING
+ccflags-y += -fno-builtin
 
 ifneq ($(c-gettimeofday-y),)
   CFLAGS_vgettimeofday.o += -fPIC -include $(c-gettimeofday-y)

arch/x86/include/asm/bug.h

@@ -13,6 +13,18 @@
 #define INSN_UD2	0x0b0f
 #define LEN_UD2		2
 
+/*
+ * In clang we have UD1s reporting UBSAN failures on X86, 64 and 32bit.
+ */
+#define INSN_ASOP		0x67
+#define OPCODE_ESCAPE		0x0f
+#define SECOND_BYTE_OPCODE_UD1	0xb9
+#define SECOND_BYTE_OPCODE_UD2	0x0b
+
+#define BUG_NONE		0xffff
+#define BUG_UD1			0xfffe
+#define BUG_UD2			0xfffd
+
 #ifdef CONFIG_GENERIC_BUG
 
 #ifdef CONFIG_X86_32

arch/x86/kernel/traps.c

@@ -41,6 +41,7 @@
 #include <linux/hardirq.h>
 #include <linux/atomic.h>
 #include <linux/iommu.h>
+#include <linux/ubsan.h>
 
 #include <asm/stacktrace.h>
 #include <asm/processor.h>
@@ -89,6 +90,47 @@ __always_inline int is_valid_bugaddr(unsigned long addr)
 	return *(unsigned short *)addr == INSN_UD2;
 }
 
+/*
+ * Check for UD1 or UD2, accounting for Address Size Override Prefixes.
+ * If it's a UD1, get the ModRM byte to pass along to UBSan.
+ */
+__always_inline int decode_bug(unsigned long addr, u32 *imm)
+{
+	u8 v;
+
+	if (addr < TASK_SIZE_MAX)
+		return BUG_NONE;
+
+	v = *(u8 *)(addr++);
+	if (v == INSN_ASOP)
+		v = *(u8 *)(addr++);
+	if (v != OPCODE_ESCAPE)
+		return BUG_NONE;
+
+	v = *(u8 *)(addr++);
+	if (v == SECOND_BYTE_OPCODE_UD2)
+		return BUG_UD2;
+
+	if (!IS_ENABLED(CONFIG_UBSAN_TRAP) || v != SECOND_BYTE_OPCODE_UD1)
+		return BUG_NONE;
+
+	/* Retrieve the immediate (type value) for the UBSAN UD1 */
+	v = *(u8 *)(addr++);
+	if (X86_MODRM_RM(v) == 4)
+		addr++;
+
+	*imm = 0;
+	if (X86_MODRM_MOD(v) == 1)
+		*imm = *(u8 *)addr;
+	else if (X86_MODRM_MOD(v) == 2)
+		*imm = *(u32 *)addr;
+	else
+		WARN_ONCE(1, "Unexpected MODRM_MOD: %u\n", X86_MODRM_MOD(v));
+
+	return BUG_UD1;
+}
+
+
 static nokprobe_inline int
 do_trap_no_signal(struct task_struct *tsk, int trapnr, const char *str,
 		  struct pt_regs *regs,	long error_code)
@@ -214,30 +256,37 @@ static inline void handle_invalid_op(struct pt_regs *regs)
 static noinstr bool handle_bug(struct pt_regs *regs)
 {
 	bool handled = false;
+	int ud_type;
+	u32 imm;
 
-	/*
-	 * Normally @regs are unpoisoned by irqentry_enter(), but handle_bug()
-	 * is a rare case that uses @regs without passing them to
-	 * irqentry_enter().
-	 */
-	kmsan_unpoison_entry_regs(regs);
-	if (!is_valid_bugaddr(regs->ip))
+	ud_type = decode_bug(regs->ip, &imm);
+	if (ud_type == BUG_NONE)
 		return handled;
 
 	/*
 	 * All lies, just get the WARN/BUG out.
 	 */
 	instrumentation_begin();
+	/*
+	 * Normally @regs are unpoisoned by irqentry_enter(), but handle_bug()
+	 * is a rare case that uses @regs without passing them to
+	 * irqentry_enter().
+	 */
+	kmsan_unpoison_entry_regs(regs);
 	/*
 	 * Since we're emulating a CALL with exceptions, restore the interrupt
 	 * state to what it was at the exception site.
 	 */
 	if (regs->flags & X86_EFLAGS_IF)
 		raw_local_irq_enable();
-	if (report_bug(regs->ip, regs) == BUG_TRAP_TYPE_WARN ||
-	    handle_cfi_failure(regs) == BUG_TRAP_TYPE_WARN) {
-		regs->ip += LEN_UD2;
-		handled = true;
+	if (ud_type == BUG_UD2) {
+		if (report_bug(regs->ip, regs) == BUG_TRAP_TYPE_WARN ||
+		    handle_cfi_failure(regs) == BUG_TRAP_TYPE_WARN) {
+			regs->ip += LEN_UD2;
+			handled = true;
+		}
+	} else if (IS_ENABLED(CONFIG_UBSAN_TRAP)) {
+		pr_crit("%s at %pS\n", report_ubsan_failure(regs, imm), (void *)regs->ip);
 	}
 	if (regs->flags & X86_EFLAGS_IF)
 		raw_local_irq_disable();

block/blk-map.c

@@ -600,9 +600,7 @@ static int blk_rq_map_user_bvec(struct request *rq, const struct iov_iter *iter)
 		if (nsegs >= nr_segs || bytes > UINT_MAX - bv->bv_len)
 			goto put_bio;
 		if (bytes + bv->bv_len > nr_iter)
-			goto put_bio;
-		if (bv->bv_offset + bv->bv_len > PAGE_SIZE)
-			goto put_bio;
+			break;
 
 		nsegs++;
 		bytes += bv->bv_len;

drivers/acpi/cppc_acpi.c

@@ -863,7 +863,7 @@ int acpi_cppc_processor_probe(struct acpi_processor *pr)
 
 	/* Store CPU Logical ID */
 	cpc_ptr->cpu_id = pr->id;
-	spin_lock_init(&cpc_ptr->rmw_lock);
+	raw_spin_lock_init(&cpc_ptr->rmw_lock);
 
 	/* Parse PSD data for this CPU */
 	ret = acpi_get_psd(cpc_ptr, handle);
@@ -1083,6 +1083,7 @@ static int cpc_write(int cpu, struct cpc_register_resource *reg_res, u64 val)
 	int pcc_ss_id = per_cpu(cpu_pcc_subspace_idx, cpu);
 	struct cpc_reg *reg = &reg_res->cpc_entry.reg;
 	struct cpc_desc *cpc_desc;
+	unsigned long flags;
 
 	size = GET_BIT_WIDTH(reg);
 
@@ -1122,7 +1123,7 @@ static int cpc_write(int cpu, struct cpc_register_resource *reg_res, u64 val)
 			return -ENODEV;
 		}
 
-		spin_lock(&cpc_desc->rmw_lock);
+		raw_spin_lock_irqsave(&cpc_desc->rmw_lock, flags);
 		switch (size) {
 		case 8:
 			prev_val = readb_relaxed(vaddr);
@@ -1137,7 +1138,7 @@ static int cpc_write(int cpu, struct cpc_register_resource *reg_res, u64 val)
 			prev_val = readq_relaxed(vaddr);
 			break;
 		default:
-			spin_unlock(&cpc_desc->rmw_lock);
+			raw_spin_unlock_irqrestore(&cpc_desc->rmw_lock, flags);
 			return -EFAULT;
 		}
 		val = MASK_VAL_WRITE(reg, prev_val, val);
@@ -1170,7 +1171,7 @@ static int cpc_write(int cpu, struct cpc_register_resource *reg_res, u64 val)
 	}
 
 	if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
-		spin_unlock(&cpc_desc->rmw_lock);
+		raw_spin_unlock_irqrestore(&cpc_desc->rmw_lock, flags);
 
 	return ret_val;
 }

drivers/base/core.c

@@ -25,7 +25,6 @@
 #include <linux/mutex.h>
 #include <linux/pm_runtime.h>
 #include <linux/netdevice.h>
-#include <linux/rcupdate.h>
 #include <linux/sched/signal.h>
 #include <linux/sched/mm.h>
 #include <linux/string_helpers.h>
@@ -2566,7 +2565,6 @@ static const char *dev_uevent_name(const struct kobject *kobj)
 static int dev_uevent(const struct kobject *kobj, struct kobj_uevent_env *env)
 {
 	const struct device *dev = kobj_to_dev(kobj);
-	struct device_driver *driver;
 	int retval = 0;
 
 	/* add device node properties if present */
@@ -2595,12 +2593,8 @@ static int dev_uevent(const struct kobject *kobj, struct kobj_uevent_env *env)
 	if (dev->type && dev->type->name)
 		add_uevent_var(env, "DEVTYPE=%s", dev->type->name);
 
-	/* Synchronize with module_remove_driver() */
-	rcu_read_lock();
-	driver = READ_ONCE(dev->driver);
-	if (driver)
-		add_uevent_var(env, "DRIVER=%s", driver->name);
-	rcu_read_unlock();
+	if (dev->driver)
+		add_uevent_var(env, "DRIVER=%s", dev->driver->name);
 
 	/* Add common DT information about the device */
 	of_device_uevent(dev, env);
@@ -2670,8 +2664,11 @@ static ssize_t uevent_show(struct device *dev, struct device_attribute *attr,
 	if (!env)
 		return -ENOMEM;
 
+	/* Synchronize with really_probe() */
+	device_lock(dev);
 	/* let the kset specific function add its keys */
 	retval = kset->uevent_ops->uevent(&dev->kobj, env);
+	device_unlock(dev);
 	if (retval)
 		goto out;
 
@@ -4014,6 +4011,41 @@ int device_for_each_child_reverse(struct device *parent, void *data,
 }
 EXPORT_SYMBOL_GPL(device_for_each_child_reverse);
 
+/**
+ * device_for_each_child_reverse_from - device child iterator in reversed order.
+ * @parent: parent struct device.
+ * @from: optional starting point in child list
+ * @fn: function to be called for each device.
+ * @data: data for the callback.
+ *
+ * Iterate over @parent's child devices, starting at @from, and call @fn
+ * for each, passing it @data. This helper is identical to
+ * device_for_each_child_reverse() when @from is NULL.
+ *
+ * @fn is checked each iteration. If it returns anything other than 0,
+ * iteration stop and that value is returned to the caller of
+ * device_for_each_child_reverse_from();
+ */
+int device_for_each_child_reverse_from(struct device *parent,
+				       struct device *from, const void *data,
+				       int (*fn)(struct device *, const void *))
+{
+	struct klist_iter i;
+	struct device *child;
+	int error = 0;
+
+	if (!parent->p)
+		return 0;
+
+	klist_iter_init_node(&parent->p->klist_children, &i,
+			     (from ? &from->p->knode_parent : NULL));
+	while ((child = prev_device(&i)) && !error)
+		error = fn(child, data);
+	klist_iter_exit(&i);
+	return error;
+}
+EXPORT_SYMBOL_GPL(device_for_each_child_reverse_from);
+
 /**
  * device_find_child - device iterator for locating a particular device.
  * @parent: parent struct device

drivers/base/module.c

@@ -7,7 +7,6 @@
 #include <linux/errno.h>
 #include <linux/slab.h>
 #include <linux/string.h>
-#include <linux/rcupdate.h>
 #include "base.h"
 
 static char *make_driver_name(struct device_driver *drv)
@@ -102,9 +101,6 @@ void module_remove_driver(struct device_driver *drv)
 	if (!drv)
 		return;
 
-	/* Synchronize with dev_uevent() */
-	synchronize_rcu();
-
 	sysfs_remove_link(&drv->p->kobj, "module");
 
 	if (drv->owner)

drivers/cxl/acpi.c

@@ -768,6 +768,13 @@ static void __exit cxl_acpi_exit(void)
 
 /* load before dax_hmem sees 'Soft Reserved' CXL ranges */
 subsys_initcall(cxl_acpi_init);
+
+/*
+ * Arrange for host-bridge ports to be active synchronous with
+ * cxl_acpi_probe() exit.
+ */
+MODULE_SOFTDEP("pre: cxl_port");
+
 module_exit(cxl_acpi_exit);
 MODULE_LICENSE("GPL v2");
 MODULE_IMPORT_NS(CXL);