Merge 4.19.46 into android-4.19

Changes in 4.19.46
	ipv6: fix src addr routing with the exception table
	ipv6: prevent possible fib6 leaks
	net: Always descend into dsa/
	net: avoid weird emergency message
	net/mlx4_core: Change the error print to info print
	net: test nouarg before dereferencing zerocopy pointers
	net: usb: qmi_wwan: add Telit 0x1260 and 0x1261 compositions
	nfp: flower: add rcu locks when accessing netdev for tunnels
	ppp: deflate: Fix possible crash in deflate_init
	rtnetlink: always put IFLA_LINK for links with a link-netnsid
	tipc: switch order of device registration to fix a crash
	vsock/virtio: free packets during the socket release
	tipc: fix modprobe tipc failed after switch order of device registration
	vsock/virtio: Initialize core virtio vsock before registering the driver
	net/mlx5: Imply MLXFW in mlx5_core
	net/mlx5e: Fix ethtool rxfh commands when CONFIG_MLX5_EN_RXNFC is disabled
	parisc: Export running_on_qemu symbol for modules
	parisc: Skip registering LED when running in QEMU
	parisc: Use PA_ASM_LEVEL in boot code
	parisc: Rename LEVEL to PA_ASM_LEVEL to avoid name clash with DRBD code
	stm class: Fix channel free in stm output free path
	stm class: Fix channel bitmap on 32-bit systems
	brd: re-enable __GFP_HIGHMEM in brd_insert_page()
	proc: prevent changes to overridden credentials
	Revert "MD: fix lock contention for flush bios"
	md: batch flush requests.
	md: add mddev->pers to avoid potential NULL pointer dereference
	dcache: sort the freeing-without-RCU-delay mess for good.
	intel_th: msu: Fix single mode with IOMMU
	p54: drop device reference count if fails to enable device
	of: fix clang -Wunsequenced for be32_to_cpu()
	cifs: fix strcat buffer overflow and reduce raciness in smb21_set_oplock_level()
	phy: ti-pipe3: fix missing bit-wise or operator when assigning val
	media: ov6650: Fix sensor possibly not detected on probe
	media: imx: csi: Allow unknown nearest upstream entities
	media: imx: Clear fwnode link struct for each endpoint iteration
	NFS4: Fix v4.0 client state corruption when mount
	PNFS fallback to MDS if no deviceid found
	clk: hi3660: Mark clk_gate_ufs_subsys as critical
	clk: tegra: Fix PLLM programming on Tegra124+ when PMC overrides divider
	clk: mediatek: Disable tuner_en before change PLL rate
	clk: rockchip: fix wrong clock definitions for rk3328
	udlfb: delete the unused parameter for dlfb_handle_damage
	udlfb: fix sleeping inside spinlock
	udlfb: introduce a rendering mutex
	fuse: fix writepages on 32bit
	fuse: honor RLIMIT_FSIZE in fuse_file_fallocate
	ovl: fix missing upper fs freeze protection on copy up for ioctl
	iommu/tegra-smmu: Fix invalid ASID bits on Tegra30/114
	ceph: flush dirty inodes before proceeding with remount
	x86_64: Add gap to int3 to allow for call emulation
	x86_64: Allow breakpoints to emulate call instructions
	ftrace/x86_64: Emulate call function while updating in breakpoint handler
	tracing: Fix partial reading of trace event's id file
	memory: tegra: Fix integer overflow on tick value calculation
	perf intel-pt: Fix instructions sampling rate
	perf intel-pt: Fix improved sample timestamp
	perf intel-pt: Fix sample timestamp wrt non-taken branches
	MIPS: perf: Fix build with CONFIG_CPU_BMIPS5000 enabled
	objtool: Allow AR to be overridden with HOSTAR
	fbdev/efifb: Ignore framebuffer memmap entries that lack any memory types
	fbdev: sm712fb: fix brightness control on reboot, don't set SR30
	fbdev: sm712fb: fix VRAM detection, don't set SR70/71/74/75
	fbdev: sm712fb: fix white screen of death on reboot, don't set CR3B-CR3F
	fbdev: sm712fb: fix boot screen glitch when sm712fb replaces VGA
	fbdev: sm712fb: fix crashes during framebuffer writes by correctly mapping VRAM
	fbdev: sm712fb: fix support for 1024x768-16 mode
	fbdev: sm712fb: use 1024x768 by default on non-MIPS, fix garbled display
	fbdev: sm712fb: fix crashes and garbled display during DPMS modesetting
	PCI: Mark AMD Stoney Radeon R7 GPU ATS as broken
	PCI: Mark Atheros AR9462 to avoid bus reset
	PCI: Init PCIe feature bits for managed host bridge alloc
	PCI/AER: Change pci_aer_init() stub to return void
	PCI: rcar: Add the initialization of PCIe link in resume_noirq()
	PCI: Factor out pcie_retrain_link() function
	PCI: Work around Pericom PCIe-to-PCI bridge Retrain Link erratum
	dm cache metadata: Fix loading discard bitset
	dm zoned: Fix zone report handling
	dm delay: fix a crash when invalid device is specified
	dm integrity: correctly calculate the size of metadata area
	dm mpath: always free attached_handler_name in parse_path()
	fuse: Add FOPEN_STREAM to use stream_open()
	xfrm: policy: Fix out-of-bound array accesses in __xfrm_policy_unlink
	xfrm6_tunnel: Fix potential panic when unloading xfrm6_tunnel module
	vti4: ipip tunnel deregistration fixes.
	xfrm: clean up xfrm protocol checks
	esp4: add length check for UDP encapsulation
	xfrm: Honor original L3 slave device in xfrmi policy lookup
	xfrm4: Fix uninitialized memory read in _decode_session4
	clk: sunxi-ng: nkmp: Avoid GENMASK(-1, 0)
	power: supply: cpcap-battery: Fix division by zero
	securityfs: fix use-after-free on symlink traversal
	apparmorfs: fix use-after-free on symlink traversal
	PCI: Fix issue with "pci=disable_acs_redir" parameter being ignored
	x86: kvm: hyper-v: deal with buggy TLB flush requests from WS2012
	mac80211: Fix kernel panic due to use of txq after free
	net: ieee802154: fix missing checks for regmap_update_bits
	KVM: arm/arm64: Ensure vcpu target is unset on reset failure
	power: supply: sysfs: prevent endless uevent loop with CONFIG_POWER_SUPPLY_DEBUG
	bpf: Fix preempt_enable_no_resched() abuse
	qmi_wwan: new Wistron, ZTE and D-Link devices
	iwlwifi: mvm: check for length correctness in iwl_mvm_create_skb()
	sched/cpufreq: Fix kobject memleak
	x86/mm/mem_encrypt: Disable all instrumentation for early SME setup
	ufs: fix braino in ufs_get_inode_gid() for solaris UFS flavour
	perf bench numa: Add define for RUSAGE_THREAD if not present
	perf/x86/intel: Fix race in intel_pmu_disable_event()
	Revert "Don't jump to compute_result state from check_result state"
	md/raid: raid5 preserve the writeback action after the parity check
	driver core: Postpone DMA tear-down until after devres release for probe failure
	Revert "selftests/bpf: skip verifier tests for unsupported program types"
	bpf: relax inode permission check for retrieving bpf program
	bpf: add map_lookup_elem_sys_only for lookups from syscall side
	bpf, lru: avoid messing with eviction heuristics upon syscall lookup
	fbdev: sm712fb: fix memory frequency by avoiding a switch/case fallthrough
	Linux 4.19.46

Signed-off-by: Greg Kroah-Hartman <[email protected]>

Documentation/filesystems/porting

@@ -622,3 +622,8 @@ in your dentry operations instead.
 	alloc_file_clone(file, flags, ops) does not affect any caller's references.
 	On success you get a new struct file sharing the mount/dentry with the
 	original, on failure - ERR_PTR().
+--
+[mandatory]
+	DCACHE_RCUACCESS is gone; having an RCU delay on dentry freeing is the
+	default.  DCACHE_NORCU opts out, and only d_alloc_pseudo() has any
+	business doing so.

Makefile

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 4
 PATCHLEVEL = 19
-SUBLEVEL = 45
+SUBLEVEL = 46
 EXTRAVERSION =
 NAME = "People's Front"
 

arch/mips/kernel/perf_event_mipsxx.c

@@ -64,17 +64,11 @@ struct mips_perf_event {
 	#define CNTR_EVEN	0x55555555
 	#define CNTR_ODD	0xaaaaaaaa
 	#define CNTR_ALL	0xffffffff
-#ifdef CONFIG_MIPS_MT_SMP
 	enum {
 		T  = 0,
 		V  = 1,
 		P  = 2,
 	} range;
-#else
-	#define T
-	#define V
-	#define P
-#endif
 };
 
 static struct mips_perf_event raw_event;
@@ -325,9 +319,7 @@ static void mipsxx_pmu_enable_event(struct hw_perf_event *evt, int idx)
 {
 	struct perf_event *event = container_of(evt, struct perf_event, hw);
 	struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
-#ifdef CONFIG_MIPS_MT_SMP
 	unsigned int range = evt->event_base >> 24;
-#endif /* CONFIG_MIPS_MT_SMP */
 
 	WARN_ON(idx < 0 || idx >= mipspmu.num_counters);
 
@@ -336,21 +328,15 @@ static void mipsxx_pmu_enable_event(struct hw_perf_event *evt, int idx)
 		/* Make sure interrupt enabled. */
 		MIPS_PERFCTRL_IE;
 
-#ifdef CONFIG_CPU_BMIPS5000
-	{
+	if (IS_ENABLED(CONFIG_CPU_BMIPS5000)) {
 		/* enable the counter for the calling thread */
 		cpuc->saved_ctrl[idx] |=
 			(1 << (12 + vpe_id())) | BRCM_PERFCTRL_TC;
-	}
-#else
-#ifdef CONFIG_MIPS_MT_SMP
-	if (range > V) {
+	} else if (IS_ENABLED(CONFIG_MIPS_MT_SMP) && range > V) {
 		/* The counter is processor wide. Set it up to count all TCs. */
 		pr_debug("Enabling perf counter for all TCs\n");
 		cpuc->saved_ctrl[idx] |= M_TC_EN_ALL;
-	} else
-#endif /* CONFIG_MIPS_MT_SMP */
-	{
+	} else {
 		unsigned int cpu, ctrl;
 
 		/*
@@ -365,7 +351,6 @@ static void mipsxx_pmu_enable_event(struct hw_perf_event *evt, int idx)
 		cpuc->saved_ctrl[idx] |= ctrl;
 		pr_debug("Enabling perf counter for CPU%d\n", cpu);
 	}
-#endif /* CONFIG_CPU_BMIPS5000 */
 	/*
 	 * We do not actually let the counter run. Leave it until start().
 	 */

arch/parisc/boot/compressed/head.S

@@ -22,7 +22,7 @@
 	__HEAD
 
 ENTRY(startup)
-	 .level LEVEL
+	 .level PA_ASM_LEVEL
 
 #define PSW_W_SM	0x200
 #define PSW_W_BIT       36
@@ -63,7 +63,7 @@ $bss_loop:
 	load32	BOOTADDR(decompress_kernel),%r3
 
 #ifdef CONFIG_64BIT
-	.level LEVEL
+	.level PA_ASM_LEVEL
 	ssm	PSW_W_SM, %r0		/* set W-bit */
 	depdi	0, 31, 32, %r3
 #endif
@@ -72,7 +72,7 @@ $bss_loop:
 
 startup_continue:
 #ifdef CONFIG_64BIT
-	.level LEVEL
+	.level PA_ASM_LEVEL
 	rsm	PSW_W_SM, %r0		/* clear W-bit */
 #endif
 

arch/parisc/include/asm/assembly.h

@@ -61,14 +61,14 @@
 #define LDCW		ldcw,co
 #define BL		b,l
 # ifdef CONFIG_64BIT
-#  define LEVEL		2.0w
+#  define PA_ASM_LEVEL	2.0w
 # else
-#  define LEVEL		2.0
+#  define PA_ASM_LEVEL	2.0
 # endif
 #else
 #define LDCW		ldcw
 #define BL		bl
-#define LEVEL		1.1
+#define PA_ASM_LEVEL	1.1
 #endif
 
 #ifdef __ASSEMBLY__

arch/parisc/kernel/head.S

@@ -22,7 +22,7 @@
 #include <linux/linkage.h>
 #include <linux/init.h>
 
-	.level	LEVEL
+	.level	PA_ASM_LEVEL
 
 	__INITDATA
 ENTRY(boot_args)
@@ -258,7 +258,7 @@ stext_pdc_ret:
 	ldo		R%PA(fault_vector_11)(%r10),%r10
 
 $is_pa20:
-	.level		LEVEL /* restore 1.1 || 2.0w */
+	.level		PA_ASM_LEVEL /* restore 1.1 || 2.0w */
 #endif /*!CONFIG_64BIT*/
 	load32		PA(fault_vector_20),%r10
 

arch/parisc/kernel/process.c

@@ -193,6 +193,7 @@ int dump_task_fpu (struct task_struct *tsk, elf_fpregset_t *r)
  */
 
 int running_on_qemu __read_mostly;
+EXPORT_SYMBOL(running_on_qemu);
 
 void __cpuidle arch_cpu_idle_dead(void)
 {

arch/parisc/kernel/syscall.S

@@ -48,7 +48,7 @@ registers).
 	 */
 #define KILL_INSN	break	0,0
 
-	.level          LEVEL
+	.level          PA_ASM_LEVEL
 
 	.text
 

arch/x86/entry/entry_64.S

@@ -905,7 +905,7 @@ apicinterrupt IRQ_WORK_VECTOR			irq_work_interrupt		smp_irq_work_interrupt
  */
 #define CPU_TSS_IST(x) PER_CPU_VAR(cpu_tss_rw) + (TSS_ist + ((x) - 1) * 8)
 
-.macro idtentry sym do_sym has_error_code:req paranoid=0 shift_ist=-1
+.macro idtentry sym do_sym has_error_code:req paranoid=0 shift_ist=-1 create_gap=0
 ENTRY(\sym)
 	UNWIND_HINT_IRET_REGS offset=\has_error_code*8
 
@@ -925,6 +925,20 @@ ENTRY(\sym)
 	jnz	.Lfrom_usermode_switch_stack_\@
 	.endif
 
+	.if \create_gap == 1
+	/*
+	 * If coming from kernel space, create a 6-word gap to allow the
+	 * int3 handler to emulate a call instruction.
+	 */
+	testb	$3, CS-ORIG_RAX(%rsp)
+	jnz	.Lfrom_usermode_no_gap_\@
+	.rept	6
+	pushq	5*8(%rsp)
+	.endr
+	UNWIND_HINT_IRET_REGS offset=8
+.Lfrom_usermode_no_gap_\@:
+	.endif
+
 	.if \paranoid
 	call	paranoid_entry
 	.else
@@ -1154,7 +1168,7 @@ apicinterrupt3 HYPERV_STIMER0_VECTOR \
 #endif /* CONFIG_HYPERV */
 
 idtentry debug			do_debug		has_error_code=0	paranoid=1 shift_ist=DEBUG_STACK
-idtentry int3			do_int3			has_error_code=0
+idtentry int3			do_int3			has_error_code=0	create_gap=1
 idtentry stack_segment		do_stack_segment	has_error_code=1
 
 #ifdef CONFIG_XEN

arch/x86/events/intel/core.c

@@ -2074,15 +2074,19 @@ static void intel_pmu_disable_event(struct perf_event *event)
 	cpuc->intel_ctrl_host_mask &= ~(1ull << hwc->idx);
 	cpuc->intel_cp_status &= ~(1ull << hwc->idx);
 
-	if (unlikely(event->attr.precise_ip))
-		intel_pmu_pebs_disable(event);
-
 	if (unlikely(hwc->config_base == MSR_ARCH_PERFMON_FIXED_CTR_CTRL)) {
 		intel_pmu_disable_fixed(hwc);
 		return;
 	}
 
 	x86_pmu_disable_event(event);
+
+	/*
+	 * Needs to be called after x86_pmu_disable_event,
+	 * so we don't trigger the event without PEBS bit set.
+	 */
+	if (unlikely(event->attr.precise_ip))
+		intel_pmu_pebs_disable(event);
 }
 
 static void intel_pmu_del_event(struct perf_event *event)

arch/x86/include/asm/text-patching.h

@@ -39,4 +39,32 @@ extern int poke_int3_handler(struct pt_regs *regs);
 extern void *text_poke_bp(void *addr, const void *opcode, size_t len, void *handler);
 extern int after_bootmem;
 
+static inline void int3_emulate_jmp(struct pt_regs *regs, unsigned long ip)
+{
+	regs->ip = ip;
+}
+
+#define INT3_INSN_SIZE 1
+#define CALL_INSN_SIZE 5
+
+#ifdef CONFIG_X86_64
+static inline void int3_emulate_push(struct pt_regs *regs, unsigned long val)
+{
+	/*
+	 * The int3 handler in entry_64.S adds a gap between the
+	 * stack where the break point happened, and the saving of
+	 * pt_regs. We can extend the original stack because of
+	 * this gap. See the idtentry macro's create_gap option.
+	 */
+	regs->sp -= sizeof(unsigned long);
+	*(unsigned long *)regs->sp = val;
+}
+
+static inline void int3_emulate_call(struct pt_regs *regs, unsigned long func)
+{
+	int3_emulate_push(regs, regs->ip - INT3_INSN_SIZE + CALL_INSN_SIZE);
+	int3_emulate_jmp(regs, func);
+}
+#endif
+
 #endif /* _ASM_X86_TEXT_PATCHING_H */

arch/x86/kernel/ftrace.c

@@ -29,6 +29,7 @@
 #include <asm/kprobes.h>
 #include <asm/ftrace.h>
 #include <asm/nops.h>
+#include <asm/text-patching.h>
 
 #ifdef CONFIG_DYNAMIC_FTRACE
 
@@ -228,6 +229,7 @@ int ftrace_modify_call(struct dyn_ftrace *rec, unsigned long old_addr,
 }
 
 static unsigned long ftrace_update_func;
+static unsigned long ftrace_update_func_call;
 
 static int update_ftrace_func(unsigned long ip, void *new)
 {
@@ -256,6 +258,8 @@ int ftrace_update_ftrace_func(ftrace_func_t func)
 	unsigned char *new;
 	int ret;
 
+	ftrace_update_func_call = (unsigned long)func;
+
 	new = ftrace_call_replace(ip, (unsigned long)func);
 	ret = update_ftrace_func(ip, new);
 
@@ -291,13 +295,28 @@ int ftrace_int3_handler(struct pt_regs *regs)
 	if (WARN_ON_ONCE(!regs))
 		return 0;
 
-	ip = regs->ip - 1;
-	if (!ftrace_location(ip) && !is_ftrace_caller(ip))
-		return 0;
+	ip = regs->ip - INT3_INSN_SIZE;
 
-	regs->ip += MCOUNT_INSN_SIZE - 1;
+#ifdef CONFIG_X86_64
+	if (ftrace_location(ip)) {
+		int3_emulate_call(regs, (unsigned long)ftrace_regs_caller);
+		return 1;
+	} else if (is_ftrace_caller(ip)) {
+		if (!ftrace_update_func_call) {
+			int3_emulate_jmp(regs, ip + CALL_INSN_SIZE);
+			return 1;
+		}
+		int3_emulate_call(regs, ftrace_update_func_call);
+		return 1;
+	}
+#else
+	if (ftrace_location(ip) || is_ftrace_caller(ip)) {
+		int3_emulate_jmp(regs, ip + CALL_INSN_SIZE);
+		return 1;
+	}
+#endif
 
-	return 1;
+	return 0;
 }
 
 static int ftrace_write(unsigned long ip, const char *val, int size)
@@ -868,6 +887,8 @@ void arch_ftrace_update_trampoline(struct ftrace_ops *ops)
 
 	func = ftrace_ops_get_func(ops);
 
+	ftrace_update_func_call = (unsigned long)func;
+
 	/* Do a safe modify in case the trampoline is executing */
 	new = ftrace_call_replace(ip, (unsigned long)func);
 	ret = update_ftrace_func(ip, new);
@@ -964,6 +985,7 @@ static int ftrace_mod_jmp(unsigned long ip, void *func)
 {
 	unsigned char *new;
 
+	ftrace_update_func_call = 0UL;
 	new = ftrace_jmp_replace(ip, (unsigned long)func);
 
 	return update_ftrace_func(ip, new);

arch/x86/kvm/hyperv.c

@@ -1291,7 +1291,16 @@ static u64 kvm_hv_flush_tlb(struct kvm_vcpu *current_vcpu, u64 ingpa,
 				       flush.address_space, flush.flags);
 
 		sparse_banks[0] = flush.processor_mask;
-		all_cpus = flush.flags & HV_FLUSH_ALL_PROCESSORS;
+
+		/*
+		 * Work around possible WS2012 bug: it sends hypercalls
+		 * with processor_mask = 0x0 and HV_FLUSH_ALL_PROCESSORS clear,
+		 * while also expecting us to flush something and crashing if
+		 * we don't. Let's treat processor_mask == 0 same as
+		 * HV_FLUSH_ALL_PROCESSORS.
+		 */
+		all_cpus = (flush.flags & HV_FLUSH_ALL_PROCESSORS) ||
+			flush.processor_mask == 0;
 	} else {
 		if (unlikely(kvm_read_guest(kvm, ingpa, &flush_ex,
 					    sizeof(flush_ex))))

arch/x86/lib/Makefile

@@ -6,6 +6,18 @@
 # Produces uninteresting flaky coverage.
 KCOV_INSTRUMENT_delay.o	:= n
 
+# Early boot use of cmdline; don't instrument it
+ifdef CONFIG_AMD_MEM_ENCRYPT
+KCOV_INSTRUMENT_cmdline.o := n
+KASAN_SANITIZE_cmdline.o  := n
+
+ifdef CONFIG_FUNCTION_TRACER
+CFLAGS_REMOVE_cmdline.o = -pg
+endif
+
+CFLAGS_cmdline.o := $(call cc-option, -fno-stack-protector)
+endif
+
 inat_tables_script = $(srctree)/arch/x86/tools/gen-insn-attr-x86.awk
 inat_tables_maps = $(srctree)/arch/x86/lib/x86-opcode-map.txt
 quiet_cmd_inat_tables = GEN     $@

drivers/base/dd.c

@@ -482,7 +482,7 @@ static int really_probe(struct device *dev, struct device_driver *drv)
 
 	ret = dma_configure(dev);
 	if (ret)
-		goto dma_failed;
+		goto probe_failed;
 
 	if (driver_sysfs_add(dev)) {
 		printk(KERN_ERR "%s: driver_sysfs_add(%s) failed\n",
@@ -537,14 +537,13 @@ static int really_probe(struct device *dev, struct device_driver *drv)
 	goto done;
 
 probe_failed:
-	dma_deconfigure(dev);
-dma_failed:
 	if (dev->bus)
 		blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
 					     BUS_NOTIFY_DRIVER_NOT_BOUND, dev);
 pinctrl_bind_failed:
 	device_links_no_driver(dev);
 	devres_release_all(dev);
+	dma_deconfigure(dev);
 	driver_sysfs_remove(dev);
 	dev->driver = NULL;
 	dev_set_drvdata(dev, NULL);