Message-ID: <2023070554-playing-footrest-d6d2@gregkh>
Date:   Wed,  5 Jul 2023 18:53:54 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org, akpm@...ux-foundation.org,
        torvalds@...ux-foundation.org, stable@...r.kernel.org
Cc:     lwn@....net, jslaby@...e.cz,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: Linux 5.15.120

diff --git a/Makefile b/Makefile
index b863208e31b2..017e48385465 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 5
 PATCHLEVEL = 15
-SUBLEVEL = 119
+SUBLEVEL = 120
 EXTRAVERSION =
 NAME = Trick or Treat
 
diff --git a/arch/parisc/include/asm/assembly.h b/arch/parisc/include/asm/assembly.h
index a39250cb7dfc..fd8c1ebd2747 100644
--- a/arch/parisc/include/asm/assembly.h
+++ b/arch/parisc/include/asm/assembly.h
@@ -72,10 +72,6 @@
 
 #include <asm/asmregs.h>
 
-	sp	=	30
-	gp	=	27
-	ipsw	=	22
-
 	/*
 	 * We provide two versions of each macro to convert from physical
 	 * to virtual and vice versa. The "_r1" versions take one argument
diff --git a/arch/x86/kernel/cpu/microcode/amd.c b/arch/x86/kernel/cpu/microcode/amd.c
index 9bffe40e97d3..6a95a52d08da 100644
--- a/arch/x86/kernel/cpu/microcode/amd.c
+++ b/arch/x86/kernel/cpu/microcode/amd.c
@@ -699,7 +699,7 @@ static enum ucode_state apply_microcode_amd(int cpu)
 	rdmsr(MSR_AMD64_PATCH_LEVEL, rev, dummy);
 
 	/* need to apply patch? */
-	if (rev >= mc_amd->hdr.patch_id) {
+	if (rev > mc_amd->hdr.patch_id) {
 		ret = UCODE_OK;
 		goto out;
 	}
diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index 85f6e242b6b4..714f66aa0338 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -105,6 +105,17 @@ DEFINE_PER_CPU_READ_MOSTLY(cpumask_var_t, cpu_llc_shared_map);
 DEFINE_PER_CPU_READ_MOSTLY(struct cpuinfo_x86, cpu_info);
 EXPORT_PER_CPU_SYMBOL(cpu_info);
 
+struct mwait_cpu_dead {
+	unsigned int	control;
+	unsigned int	status;
+};
+
+/*
+ * Cache line aligned data for mwait_play_dead(). Separate on purpose so
+ * that it's unlikely to be touched by other CPUs.
+ */
+static DEFINE_PER_CPU_ALIGNED(struct mwait_cpu_dead, mwait_cpu_dead);
+
 /* Logical package management. We might want to allocate that dynamically */
 unsigned int __max_logical_packages __read_mostly;
 EXPORT_SYMBOL(__max_logical_packages);
@@ -1685,10 +1696,10 @@ EXPORT_SYMBOL_GPL(cond_wakeup_cpu0);
  */
 static inline void mwait_play_dead(void)
 {
+	struct mwait_cpu_dead *md = this_cpu_ptr(&mwait_cpu_dead);
 	unsigned int eax, ebx, ecx, edx;
 	unsigned int highest_cstate = 0;
 	unsigned int highest_subcstate = 0;
-	void *mwait_ptr;
 	int i;
 
 	if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD ||
@@ -1723,13 +1734,6 @@ static inline void mwait_play_dead(void)
 			(highest_subcstate - 1);
 	}
 
-	/*
-	 * This should be a memory location in a cache line which is
-	 * unlikely to be touched by other processors.  The actual
-	 * content is immaterial as it is not actually modified in any way.
-	 */
-	mwait_ptr = &current_thread_info()->flags;
-
 	wbinvd();
 
 	while (1) {
@@ -1741,9 +1745,9 @@ static inline void mwait_play_dead(void)
 		 * case where we return around the loop.
 		 */
 		mb();
-		clflush(mwait_ptr);
+		clflush(md);
 		mb();
-		__monitor(mwait_ptr, 0, 0);
+		__monitor(md, 0, 0);
 		mb();
 		__mwait(eax, 0);
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index d03a4519f945..8a0b652da4f4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -685,7 +685,6 @@ int amdgpu_bo_create_vm(struct amdgpu_device *adev,
 	 * num of amdgpu_vm_pt entries.
 	 */
 	BUG_ON(bp->bo_ptr_size < sizeof(struct amdgpu_bo_vm));
-	bp->destroy = &amdgpu_bo_vm_destroy;
 	r = amdgpu_bo_create(adev, bp, &bo_ptr);
 	if (r)
 		return r;
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
index 924c6d5f8620..8da5cc8fcc6c 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c
@@ -3274,6 +3274,10 @@ int amdgpu_vm_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 	long timeout = msecs_to_jiffies(2000);
 	int r;
 
+	/* No valid flags defined yet */
+	if (args->in.flags)
+		return -EINVAL;
+
 	switch (args->in.op) {
 	case AMDGPU_VM_OP_RESERVE_VMID:
 		/* We only have requirement to reserve vmid from gfxhub */
diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index baa68ae9b9ef..c61da859cd3c 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -4295,7 +4295,7 @@ static const struct hid_device_id hidpp_devices[] = {
 	{ /* wireless touchpad T651 */
 	  HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
 		USB_DEVICE_ID_LOGITECH_T651),
-	  .driver_data = HIDPP_QUIRK_CLASS_WTP },
+	  .driver_data = HIDPP_QUIRK_CLASS_WTP | HIDPP_QUIRK_DELAYED_INIT },
 	{ /* Mouse Logitech Anywhere MX */
 	  LDJ_DEVICE(0x1017), .driver_data = HIDPP_QUIRK_HI_RES_SCROLL_1P0 },
 	{ /* Mouse Logitech Cube */
diff --git a/drivers/hid/wacom_wac.c b/drivers/hid/wacom_wac.c
index 5fd766ad6e45..02ca80f68d17 100644
--- a/drivers/hid/wacom_wac.c
+++ b/drivers/hid/wacom_wac.c
@@ -1314,7 +1314,7 @@ static void wacom_intuos_pro2_bt_pen(struct wacom_wac *wacom)
 	struct input_dev *pen_input = wacom->pen_input;
 	unsigned char *data = wacom->data;
 	int number_of_valid_frames = 0;
-	int time_interval = 15000000;
+	ktime_t time_interval = 15000000;
 	ktime_t time_packet_received = ktime_get();
 	int i;
 
@@ -1348,7 +1348,7 @@ static void wacom_intuos_pro2_bt_pen(struct wacom_wac *wacom)
 	if (number_of_valid_frames) {
 		if (wacom->hid_data.time_delayed)
 			time_interval = ktime_get() - wacom->hid_data.time_delayed;
-		time_interval /= number_of_valid_frames;
+		time_interval = div_u64(time_interval, number_of_valid_frames);
 		wacom->hid_data.time_delayed = time_packet_received;
 	}
 
@@ -1359,7 +1359,7 @@ static void wacom_intuos_pro2_bt_pen(struct wacom_wac *wacom)
 		bool range = frame[0] & 0x20;
 		bool invert = frame[0] & 0x10;
 		int frames_number_reversed = number_of_valid_frames - i - 1;
-		int event_timestamp = time_packet_received - frames_number_reversed * time_interval;
+		ktime_t event_timestamp = time_packet_received - frames_number_reversed * time_interval;
 
 		if (!valid)
 			continue;
diff --git a/drivers/hid/wacom_wac.h b/drivers/hid/wacom_wac.h
index dbf23e71aa72..db06084c4ed5 100644
--- a/drivers/hid/wacom_wac.h
+++ b/drivers/hid/wacom_wac.h
@@ -321,7 +321,7 @@ struct hid_data {
 	int bat_connected;
 	int ps_connected;
 	bool pad_input_event_flag;
-	int time_delayed;
+	ktime_t time_delayed;
 };
 
 struct wacom_remote_data {
diff --git a/drivers/nubus/proc.c b/drivers/nubus/proc.c
index 88e1f9a0faaf..78cf0e7b53d5 100644
--- a/drivers/nubus/proc.c
+++ b/drivers/nubus/proc.c
@@ -137,6 +137,18 @@ static int nubus_proc_rsrc_show(struct seq_file *m, void *v)
 	return 0;
 }
 
+static int nubus_rsrc_proc_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, nubus_proc_rsrc_show, inode);
+}
+
+static const struct proc_ops nubus_rsrc_proc_ops = {
+	.proc_open	= nubus_rsrc_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= single_release,
+};
+
 void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir,
 			     const struct nubus_dirent *ent,
 			     unsigned int size)
@@ -152,8 +164,8 @@ void nubus_proc_add_rsrc_mem(struct proc_dir_entry *procdir,
 		pde_data = nubus_proc_alloc_pde_data(nubus_dirptr(ent), size);
 	else
 		pde_data = NULL;
-	proc_create_single_data(name, S_IFREG | 0444, procdir,
-			nubus_proc_rsrc_show, pde_data);
+	proc_create_data(name, S_IFREG | 0444, procdir,
+			 &nubus_rsrc_proc_ops, pde_data);
 }
 
 void nubus_proc_add_rsrc(struct proc_dir_entry *procdir,
@@ -166,9 +178,9 @@ void nubus_proc_add_rsrc(struct proc_dir_entry *procdir,
 		return;
 
 	snprintf(name, sizeof(name), "%x", ent->type);
-	proc_create_single_data(name, S_IFREG | 0444, procdir,
-			nubus_proc_rsrc_show,
-			nubus_proc_alloc_pde_data(data, 0));
+	proc_create_data(name, S_IFREG | 0444, procdir,
+			 &nubus_rsrc_proc_ops,
+			 nubus_proc_alloc_pde_data(data, 0));
 }
 
 /*
diff --git a/drivers/thermal/mtk_thermal.c b/drivers/thermal/mtk_thermal.c
index 9c857fb5d968..ede94eadddda 100644
--- a/drivers/thermal/mtk_thermal.c
+++ b/drivers/thermal/mtk_thermal.c
@@ -1028,12 +1028,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	auxadc_base = devm_of_iomap(&pdev->dev, auxadc, 0, NULL);
-	if (IS_ERR(auxadc_base)) {
-		of_node_put(auxadc);
-		return PTR_ERR(auxadc_base);
-	}
-
+	auxadc_base = of_iomap(auxadc, 0);
 	auxadc_phys_base = of_get_phys_base(auxadc);
 
 	of_node_put(auxadc);
@@ -1049,12 +1044,7 @@ static int mtk_thermal_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	apmixed_base = devm_of_iomap(&pdev->dev, apmixedsys, 0, NULL);
-	if (IS_ERR(apmixed_base)) {
-		of_node_put(apmixedsys);
-		return PTR_ERR(apmixed_base);
-	}
-
+	apmixed_base = of_iomap(apmixedsys, 0);
 	apmixed_phys_base = of_get_phys_base(apmixedsys);
 
 	of_node_put(apmixedsys);
diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index b4c49f9cc379..87763f48c6c3 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -247,6 +247,30 @@ static inline void copy_user_highpage(struct page *to, struct page *from,
 
 #endif
 
+#ifdef copy_mc_to_kernel
+static inline int copy_mc_user_highpage(struct page *to, struct page *from,
+					unsigned long vaddr, struct vm_area_struct *vma)
+{
+	unsigned long ret;
+	char *vfrom, *vto;
+
+	vfrom = kmap_local_page(from);
+	vto = kmap_local_page(to);
+	ret = copy_mc_to_kernel(vto, vfrom, PAGE_SIZE);
+	kunmap_local(vto);
+	kunmap_local(vfrom);
+
+	return ret;
+}
+#else
+static inline int copy_mc_user_highpage(struct page *to, struct page *from,
+					unsigned long vaddr, struct vm_area_struct *vma)
+{
+	copy_user_highpage(to, from, vaddr, vma);
+	return 0;
+}
+#endif
+
 #ifndef __HAVE_ARCH_COPY_HIGHPAGE
 
 static inline void copy_highpage(struct page *to, struct page *from)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index e4e1817bb3b8..a27a6b58d374 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3124,7 +3124,6 @@ enum mf_flags {
 	MF_SOFT_OFFLINE = 1 << 3,
 };
 extern int memory_failure(unsigned long pfn, int flags);
-extern void memory_failure_queue(unsigned long pfn, int flags);
 extern void memory_failure_queue_kick(int cpu);
 extern int unpoison_memory(unsigned long pfn);
 extern int sysctl_memory_failure_early_kill;
@@ -3133,8 +3132,12 @@ extern void shake_page(struct page *p);
 extern atomic_long_t num_poisoned_pages __read_mostly;
 extern int soft_offline_page(unsigned long pfn, int flags);
 #ifdef CONFIG_MEMORY_FAILURE
+extern void memory_failure_queue(unsigned long pfn, int flags);
 extern int __get_huge_page_for_hwpoison(unsigned long pfn, int flags);
 #else
+static inline void memory_failure_queue(unsigned long pfn, int flags)
+{
+}
 static inline int __get_huge_page_for_hwpoison(unsigned long pfn, int flags)
 {
 	return 0;
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 4f2271f27a1d..7a70595c3c15 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -12588,9 +12588,10 @@ static int jit_subprogs(struct bpf_verifier_env *env)
 	}
 
 	/* finally lock prog and jit images for all functions and
-	 * populate kallsysm
+	 * populate kallsysm. Begin at the first subprogram, since
+	 * bpf_prog_load will add the kallsyms for the main program.
 	 */
-	for (i = 0; i < env->subprog_cnt; i++) {
+	for (i = 1; i < env->subprog_cnt; i++) {
 		bpf_prog_lock_ro(func[i]);
 		bpf_prog_kallsyms_add(func[i]);
 	}
@@ -12615,6 +12616,8 @@ static int jit_subprogs(struct bpf_verifier_env *env)
 
 	prog->jited = 1;
 	prog->bpf_func = func[0]->bpf_func;
+	prog->aux->extable = func[0]->aux->extable;
+	prog->aux->num_exentries = func[0]->aux->num_exentries;
 	prog->aux->func = func;
 	prog->aux->func_cnt = env->subprog_cnt;
 	bpf_prog_jit_attempt_done(prog);
diff --git a/mm/memory.c b/mm/memory.c
index 8d71a82462dd..1bb01b12db53 100644
--- a/mm/memory.c
+++ b/mm/memory.c
@@ -2753,10 +2753,16 @@ static inline int pte_unmap_same(struct mm_struct *mm, pmd_t *pmd,
 	return same;
 }
 
-static inline bool cow_user_page(struct page *dst, struct page *src,
-				 struct vm_fault *vmf)
+/*
+ * Return:
+ *	0:		copied succeeded
+ *	-EHWPOISON:	copy failed due to hwpoison in source page
+ *	-EAGAIN:	copied failed (some other reason)
+ */
+static inline int cow_user_page(struct page *dst, struct page *src,
+				      struct vm_fault *vmf)
 {
-	bool ret;
+	int ret;
 	void *kaddr;
 	void __user *uaddr;
 	bool locked = false;
@@ -2765,8 +2771,11 @@ static inline bool cow_user_page(struct page *dst, struct page *src,
 	unsigned long addr = vmf->address;
 
 	if (likely(src)) {
-		copy_user_highpage(dst, src, addr, vma);
-		return true;
+		if (copy_mc_user_highpage(dst, src, addr, vma)) {
+			memory_failure_queue(page_to_pfn(src), 0);
+			return -EHWPOISON;
+		}
+		return 0;
 	}
 
 	/*
@@ -2793,7 +2802,7 @@ static inline bool cow_user_page(struct page *dst, struct page *src,
 			 * and update local tlb only
 			 */
 			update_mmu_tlb(vma, addr, vmf->pte);
-			ret = false;
+			ret = -EAGAIN;
 			goto pte_unlock;
 		}
 
@@ -2818,7 +2827,7 @@ static inline bool cow_user_page(struct page *dst, struct page *src,
 		if (!likely(pte_same(*vmf->pte, vmf->orig_pte))) {
 			/* The PTE changed under us, update local tlb */
 			update_mmu_tlb(vma, addr, vmf->pte);
-			ret = false;
+			ret = -EAGAIN;
 			goto pte_unlock;
 		}
 
@@ -2837,7 +2846,7 @@ static inline bool cow_user_page(struct page *dst, struct page *src,
 		}
 	}
 
-	ret = true;
+	ret = 0;
 
 pte_unlock:
 	if (locked)
@@ -3003,6 +3012,7 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
 	pte_t entry;
 	int page_copied = 0;
 	struct mmu_notifier_range range;
+	int ret;
 
 	if (unlikely(anon_vma_prepare(vma)))
 		goto oom;
@@ -3018,17 +3028,20 @@ static vm_fault_t wp_page_copy(struct vm_fault *vmf)
 		if (!new_page)
 			goto oom;
 
-		if (!cow_user_page(new_page, old_page, vmf)) {
+		ret = cow_user_page(new_page, old_page, vmf);
+		if (ret) {
 			/*
 			 * COW failed, if the fault was solved by other,
 			 * it's fine. If not, userspace would re-fault on
 			 * the same address and we will handle the fault
 			 * from the second attempt.
+			 * The -EHWPOISON case will not be retried.
 			 */
 			put_page(new_page);
 			if (old_page)
 				put_page(old_page);
-			return 0;
+
+			return ret == -EHWPOISON ? VM_FAULT_HWPOISON : 0;
 		}
 	}
 
diff --git a/net/can/isotp.c b/net/can/isotp.c
index ca69ca39c8fd..4dccf7b4b88d 100644
--- a/net/can/isotp.c
+++ b/net/can/isotp.c
@@ -992,8 +992,9 @@ static int isotp_sendmsg(struct socket *sock, struct msghdr *msg, size_t size)
 		/* wait for complete transmission of current pdu */
 		wait_event_interruptible(so->wait, so->tx.state == ISOTP_IDLE);
 
-		if (sk->sk_err)
-			return -sk->sk_err;
+		err = sock_error(sk);
+		if (err)
+			return err;
 	}
 
 	return size;
diff --git a/net/mptcp/protocol.c b/net/mptcp/protocol.c
index b6a38af72e1b..82b1583f709d 100644
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -51,7 +51,7 @@ enum {
 static struct percpu_counter mptcp_sockets_allocated;
 
 static void __mptcp_destroy_sock(struct sock *sk);
-static void __mptcp_check_send_data_fin(struct sock *sk);
+static void mptcp_check_send_data_fin(struct sock *sk);
 
 DEFINE_PER_CPU(struct mptcp_delegated_action, mptcp_delegated_actions);
 static struct net_device mptcp_napi_dev;
@@ -355,8 +355,7 @@ static bool mptcp_pending_data_fin_ack(struct sock *sk)
 {
 	struct mptcp_sock *msk = mptcp_sk(sk);
 
-	return !__mptcp_check_fallback(msk) &&
-	       ((1 << sk->sk_state) &
+	return ((1 << sk->sk_state) &
 		(TCPF_FIN_WAIT1 | TCPF_CLOSING | TCPF_LAST_ACK)) &&
 	       msk->write_seq == READ_ONCE(msk->snd_una);
 }
@@ -509,9 +508,6 @@ static bool mptcp_check_data_fin(struct sock *sk)
 	u64 rcv_data_fin_seq;
 	bool ret = false;
 
-	if (__mptcp_check_fallback(msk))
-		return ret;
-
 	/* Need to ack a DATA_FIN received from a peer while this side
 	 * of the connection is in ESTABLISHED, FIN_WAIT1, or FIN_WAIT2.
 	 * msk->rcv_data_fin was set when parsing the incoming options
@@ -549,7 +545,8 @@ static bool mptcp_check_data_fin(struct sock *sk)
 		}
 
 		ret = true;
-		mptcp_send_ack(msk);
+		if (!__mptcp_check_fallback(msk))
+			mptcp_send_ack(msk);
 		mptcp_close_wake_up(sk);
 	}
 	return ret;
@@ -1612,7 +1609,7 @@ void __mptcp_push_pending(struct sock *sk, unsigned int flags)
 	if (!mptcp_timer_pending(sk))
 		mptcp_reset_timer(sk);
 	if (copied)
-		__mptcp_check_send_data_fin(sk);
+		mptcp_check_send_data_fin(sk);
 }
 
 static void __mptcp_subflow_push_pending(struct sock *sk, struct sock *ssk)
@@ -2451,7 +2448,6 @@ static void mptcp_worker(struct work_struct *work)
 	if (unlikely((1 << state) & (TCPF_CLOSE | TCPF_LISTEN)))
 		goto unlock;
 
-	mptcp_check_data_fin_ack(sk);
 	mptcp_flush_join_list(msk);
 
 	mptcp_check_fastclose(msk);
@@ -2462,7 +2458,8 @@ static void mptcp_worker(struct work_struct *work)
 	if (test_and_clear_bit(MPTCP_WORK_EOF, &msk->flags))
 		mptcp_check_for_eof(msk);
 
-	__mptcp_check_send_data_fin(sk);
+	mptcp_check_send_data_fin(sk);
+	mptcp_check_data_fin_ack(sk);
 	mptcp_check_data_fin(sk);
 
 	/* There is no point in keeping around an orphaned sk timedout or
@@ -2591,6 +2588,12 @@ void mptcp_subflow_shutdown(struct sock *sk, struct sock *ssk, int how)
 			pr_debug("Fallback");
 			ssk->sk_shutdown |= how;
 			tcp_shutdown(ssk, how);
+
+			/* simulate the data_fin ack reception to let the state
+			 * machine move forward
+			 */
+			WRITE_ONCE(mptcp_sk(sk)->snd_una, mptcp_sk(sk)->snd_nxt);
+			mptcp_schedule_work(sk);
 		} else {
 			pr_debug("Sending DATA_FIN on subflow %p", ssk);
 			tcp_send_ack(ssk);
@@ -2630,7 +2633,7 @@ static int mptcp_close_state(struct sock *sk)
 	return next & TCP_ACTION_FIN;
 }
 
-static void __mptcp_check_send_data_fin(struct sock *sk)
+static void mptcp_check_send_data_fin(struct sock *sk)
 {
 	struct mptcp_subflow_context *subflow;
 	struct mptcp_sock *msk = mptcp_sk(sk);
@@ -2648,18 +2651,6 @@ static void __mptcp_check_send_data_fin(struct sock *sk)
 
 	WRITE_ONCE(msk->snd_nxt, msk->write_seq);
 
-	/* fallback socket will not get data_fin/ack, can move to the next
-	 * state now
-	 */
-	if (__mptcp_check_fallback(msk)) {
-		if ((1 << sk->sk_state) & (TCPF_CLOSING | TCPF_LAST_ACK)) {
-			inet_sk_state_store(sk, TCP_CLOSE);
-			mptcp_close_wake_up(sk);
-		} else if (sk->sk_state == TCP_FIN_WAIT1) {
-			inet_sk_state_store(sk, TCP_FIN_WAIT2);
-		}
-	}
-
 	mptcp_flush_join_list(msk);
 	mptcp_for_each_subflow(msk, subflow) {
 		struct sock *tcp_sk = mptcp_subflow_tcp_sock(subflow);
@@ -2680,7 +2671,7 @@ static void __mptcp_wr_shutdown(struct sock *sk)
 	WRITE_ONCE(msk->write_seq, msk->write_seq + 1);
 	WRITE_ONCE(msk->snd_data_fin_enable, 1);
 
-	__mptcp_check_send_data_fin(sk);
+	mptcp_check_send_data_fin(sk);
 }
 
 static void __mptcp_destroy_sock(struct sock *sk)
@@ -2807,6 +2798,12 @@ static int mptcp_disconnect(struct sock *sk, int flags)
 	struct mptcp_subflow_context *subflow;
 	struct mptcp_sock *msk = mptcp_sk(sk);
 
+	/* Deny disconnect if other threads are blocked in sk_wait_event()
+	 * or inet_wait_for_connect().
+	 */
+	if (sk->sk_wait_pending)
+		return -EBUSY;
+
 	mptcp_do_flush_join_list(msk);
 
 	mptcp_for_each_subflow(msk, subflow) {
@@ -2845,6 +2842,7 @@ struct sock *mptcp_sk_clone(const struct sock *sk,
 		inet_sk(nsk)->pinet6 = mptcp_inet6_sk(nsk);
 #endif
 
+	nsk->sk_wait_pending = 0;
 	__mptcp_init_sock(nsk);
 
 	msk = mptcp_sk(nsk);
diff --git a/net/mptcp/subflow.c b/net/mptcp/subflow.c
index 9b89999062c9..666f6720db76 100644
--- a/net/mptcp/subflow.c
+++ b/net/mptcp/subflow.c
@@ -1653,14 +1653,16 @@ static void subflow_state_change(struct sock *sk)
 {
 	struct mptcp_subflow_context *subflow = mptcp_subflow_ctx(sk);
 	struct sock *parent = subflow->conn;
+	struct mptcp_sock *msk;
 
 	__subflow_state_change(sk);
 
+	msk = mptcp_sk(parent);
 	if (subflow_simultaneous_connect(sk)) {
 		mptcp_propagate_sndbuf(parent, sk);
 		mptcp_do_fallback(sk);
-		mptcp_rcv_space_init(mptcp_sk(parent), sk);
-		pr_fallback(mptcp_sk(parent));
+		mptcp_rcv_space_init(msk, sk);
+		pr_fallback(msk);
 		subflow->conn_finished = 1;
 		mptcp_set_connected(parent);
 	}
@@ -1676,11 +1678,12 @@ static void subflow_state_change(struct sock *sk)
 
 	subflow_sched_work_if_closed(mptcp_sk(parent), sk);
 
-	if (__mptcp_check_fallback(mptcp_sk(parent)) &&
-	    !subflow->rx_eof && subflow_is_done(sk)) {
-		subflow->rx_eof = 1;
-		mptcp_subflow_eof(parent);
-	}
+	/* when the fallback subflow closes the rx side, trigger a 'dummy'
+	 * ingress data fin, so that the msk state will follow along
+	 */
+	if (__mptcp_check_fallback(msk) && subflow_is_done(sk) && msk->first == sk &&
+	    mptcp_update_rcv_data_fin(msk, READ_ONCE(msk->ack_seq), true))
+		mptcp_schedule_work(parent);
 }
 
 static int subflow_ulp_init(struct sock *sk)
diff --git a/scripts/tags.sh b/scripts/tags.sh
index 91413d45f0fa..d40cae4e7ea2 100755
--- a/scripts/tags.sh
+++ b/scripts/tags.sh
@@ -32,6 +32,13 @@ else
 	ignore="$ignore ( -path ${tree}tools ) -prune -o"
 fi
 
+# gtags(1) refuses to index any file outside of its current working dir.
+# If gtags indexing is requested and the build output directory is not
+# the kernel source tree, index all files in absolute-path form.
+if [[ "$1" == "gtags" && -n "${tree}" ]]; then
+	tree=$(realpath "$tree")/
+fi
+
 # Detect if ALLSOURCE_ARCHS is set. If not, we assume SRCARCH
 if [ "${ALLSOURCE_ARCHS}" = "" ]; then
 	ALLSOURCE_ARCHS=${SRCARCH}
@@ -131,7 +138,7 @@ docscope()
 
 dogtags()
 {
-	all_target_sources | gtags -i -f -
+	all_target_sources | gtags -i -C "${tree:-.}" -f - "$PWD"
 }
 
 # Basic regular expressions with an optional /kind-spec/ for ctags and
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index b1e5fd99e38a..80c54196e0e4 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -1357,10 +1357,23 @@ static int dso__load_kcore(struct dso *dso, struct map *map,
 
 	/* Find the kernel map using the '_stext' symbol */
 	if (!kallsyms__get_function_start(kallsyms_filename, "_stext", &stext)) {
+		u64 replacement_size = 0;
+
 		list_for_each_entry(new_map, &md.maps, node) {
-			if (stext >= new_map->start && stext < new_map->end) {
+			u64 new_size = new_map->end - new_map->start;
+
+			if (!(stext >= new_map->start && stext < new_map->end))
+				continue;
+
+			/*
+			 * On some architectures, ARM64 for example, the kernel
+			 * text can get allocated inside of the vmalloc segment.
+			 * Select the smallest matching segment, in case stext
+			 * falls within more than one in the list.
+			 */
+			if (!replacement_map || new_size < replacement_size) {
 				replacement_map = new_map;
-				break;
+				replacement_size = new_size;
 			}
 		}
 	}

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