Re: Linux 5.10.141

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

diff --git a/Makefile b/Makefile
index a80179d2c005..d2833d29d65f 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 5
 PATCHLEVEL = 10
-SUBLEVEL = 140
+SUBLEVEL = 141
 EXTRAVERSION =
 NAME = Dare mighty things
 
diff --git a/arch/s390/hypfs/hypfs_diag.c b/arch/s390/hypfs/hypfs_diag.c
index f0bc4dc3e9bf..6511d15ace45 100644
--- a/arch/s390/hypfs/hypfs_diag.c
+++ b/arch/s390/hypfs/hypfs_diag.c
@@ -437,7 +437,7 @@ __init int hypfs_diag_init(void)
 	int rc;
 
 	if (diag204_probe()) {
-		pr_err("The hardware system does not support hypfs\n");
+		pr_info("The hardware system does not support hypfs\n");
 		return -ENODATA;
 	}
 
diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c
index 5c97f48cea91..ee919bfc8186 100644
--- a/arch/s390/hypfs/inode.c
+++ b/arch/s390/hypfs/inode.c
@@ -496,9 +496,9 @@ static int __init hypfs_init(void)
 	hypfs_vm_exit();
 fail_hypfs_diag_exit:
 	hypfs_diag_exit();
+	pr_err("Initialization of hypfs failed with rc=%i\n", rc);
 fail_dbfs_exit:
 	hypfs_dbfs_exit();
-	pr_err("Initialization of hypfs failed with rc=%i\n", rc);
 	return rc;
 }
 device_initcall(hypfs_init)
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index ed517fad0d03..1866374356c8 100644
--- a/arch/s390/mm/fault.c
+++ b/arch/s390/mm/fault.c
@@ -429,7 +429,9 @@ static inline vm_fault_t do_exception(struct pt_regs *regs, int access)
 	flags = FAULT_FLAG_DEFAULT;
 	if (user_mode(regs))
 		flags |= FAULT_FLAG_USER;
-	if (access == VM_WRITE || (trans_exc_code & store_indication) == 0x400)
+	if ((trans_exc_code & store_indication) == 0x400)
+		access = VM_WRITE;
+	if (access == VM_WRITE)
 		flags |= FAULT_FLAG_WRITE;
 	mmap_read_lock(mm);
 
diff --git a/arch/x86/include/asm/nospec-branch.h b/arch/x86/include/asm/nospec-branch.h
index 0acd99329923..07f5030073bb 100644
--- a/arch/x86/include/asm/nospec-branch.h
+++ b/arch/x86/include/asm/nospec-branch.h
@@ -35,33 +35,56 @@
 #define RSB_CLEAR_LOOPS		32	/* To forcibly overwrite all entries */
 
 /*
+ * Common helper for __FILL_RETURN_BUFFER and __FILL_ONE_RETURN.
+ */
+#define __FILL_RETURN_SLOT			\
+	ANNOTATE_INTRA_FUNCTION_CALL;		\
+	call	772f;				\
+	int3;					\
+772:
+
+/*
+ * Stuff the entire RSB.
+ *
  * Google experimented with loop-unrolling and this turned out to be
  * the optimal version — two calls, each with their own speculation
  * trap should their return address end up getting used, in a loop.
  */
-#define __FILL_RETURN_BUFFER(reg, nr, sp)	\
-	mov	$(nr/2), reg;			\
-771:						\
-	ANNOTATE_INTRA_FUNCTION_CALL;		\
-	call	772f;				\
-773:	/* speculation trap */			\
-	UNWIND_HINT_EMPTY;			\
-	pause;					\
-	lfence;					\
-	jmp	773b;				\
-772:						\
-	ANNOTATE_INTRA_FUNCTION_CALL;		\
-	call	774f;				\
-775:	/* speculation trap */			\
-	UNWIND_HINT_EMPTY;			\
-	pause;					\
-	lfence;					\
-	jmp	775b;				\
-774:						\
-	add	$(BITS_PER_LONG/8) * 2, sp;	\
-	dec	reg;				\
-	jnz	771b;				\
-	/* barrier for jnz misprediction */	\
+#ifdef CONFIG_X86_64
+#define __FILL_RETURN_BUFFER(reg, nr)			\
+	mov	$(nr/2), reg;				\
+771:							\
+	__FILL_RETURN_SLOT				\
+	__FILL_RETURN_SLOT				\
+	add	$(BITS_PER_LONG/8) * 2, %_ASM_SP;	\
+	dec	reg;					\
+	jnz	771b;					\
+	/* barrier for jnz misprediction */		\
+	lfence;
+#else
+/*
+ * i386 doesn't unconditionally have LFENCE, as such it can't
+ * do a loop.
+ */
+#define __FILL_RETURN_BUFFER(reg, nr)			\
+	.rept nr;					\
+	__FILL_RETURN_SLOT;				\
+	.endr;						\
+	add	$(BITS_PER_LONG/8) * nr, %_ASM_SP;
+#endif
+
+/*
+ * Stuff a single RSB slot.
+ *
+ * To mitigate Post-Barrier RSB speculation, one CALL instruction must be
+ * forced to retire before letting a RET instruction execute.
+ *
+ * On PBRSB-vulnerable CPUs, it is not safe for a RET to be executed
+ * before this point.
+ */
+#define __FILL_ONE_RETURN				\
+	__FILL_RETURN_SLOT				\
+	add	$(BITS_PER_LONG/8), %_ASM_SP;		\
 	lfence;
 
 #ifdef __ASSEMBLY__
@@ -120,28 +143,15 @@
 #endif
 .endm
 
-.macro ISSUE_UNBALANCED_RET_GUARD
-	ANNOTATE_INTRA_FUNCTION_CALL
-	call .Lunbalanced_ret_guard_\@
-	int3
-.Lunbalanced_ret_guard_\@:
-	add $(BITS_PER_LONG/8), %_ASM_SP
-	lfence
-.endm
-
  /*
   * A simpler FILL_RETURN_BUFFER macro. Don't make people use the CPP
   * monstrosity above, manually.
   */
-.macro FILL_RETURN_BUFFER reg:req nr:req ftr:req ftr2
-.ifb \ftr2
-	ALTERNATIVE "jmp .Lskip_rsb_\@", "", \ftr
-.else
-	ALTERNATIVE_2 "jmp .Lskip_rsb_\@", "", \ftr, "jmp .Lunbalanced_\@", \ftr2
-.endif
-	__FILL_RETURN_BUFFER(\reg,\nr,%_ASM_SP)
-.Lunbalanced_\@:
-	ISSUE_UNBALANCED_RET_GUARD
+.macro FILL_RETURN_BUFFER reg:req nr:req ftr:req ftr2=ALT_NOT(X86_FEATURE_ALWAYS)
+	ALTERNATIVE_2 "jmp .Lskip_rsb_\@", \
+		__stringify(__FILL_RETURN_BUFFER(\reg,\nr)), \ftr, \
+		__stringify(__FILL_ONE_RETURN), \ftr2
+
 .Lskip_rsb_\@:
 .endm
 
diff --git a/drivers/android/binder.c b/drivers/android/binder.c
index 366b12405708..a5d5247c4f3e 100644
--- a/drivers/android/binder.c
+++ b/drivers/android/binder.c
@@ -6069,6 +6069,7 @@ const struct file_operations binder_fops = {
 	.open = binder_open,
 	.flush = binder_flush,
 	.release = binder_release,
+	.may_pollfree = true,
 };
 
 static int __init init_binder_device(const char *name)
diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
index 2e3b76519b49..b624f3d8f0e6 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -327,7 +327,23 @@ static struct miscdevice udmabuf_misc = {
 
 static int __init udmabuf_dev_init(void)
 {
-	return misc_register(&udmabuf_misc);
+	int ret;
+
+	ret = misc_register(&udmabuf_misc);
+	if (ret < 0) {
+		pr_err("Could not initialize udmabuf device\n");
+		return ret;
+	}
+
+	ret = dma_coerce_mask_and_coherent(udmabuf_misc.this_device,
+					   DMA_BIT_MASK(64));
+	if (ret < 0) {
+		pr_err("Could not setup DMA mask for udmabuf device\n");
+		misc_deregister(&udmabuf_misc);
+		return ret;
+	}
+
+	return 0;
 }
 
 static void __exit udmabuf_dev_exit(void)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index d949d6c52f24..ff5555353eb4 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -283,7 +283,7 @@ enum amdgpu_kiq_irq {
 	AMDGPU_CP_KIQ_IRQ_DRIVER0 = 0,
 	AMDGPU_CP_KIQ_IRQ_LAST
 };
-
+#define SRIOV_USEC_TIMEOUT  1200000 /* wait 12 * 100ms for SRIOV */
 #define MAX_KIQ_REG_WAIT       5000 /* in usecs, 5ms */
 #define MAX_KIQ_REG_BAILOUT_INTERVAL   5 /* in msecs, 5ms */
 #define MAX_KIQ_REG_TRY 80 /* 20 -> 80 */
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
index 150fa5258fb6..2aa9242c58ab 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v10_0.c
@@ -371,6 +371,7 @@ static int gmc_v10_0_flush_gpu_tlb_pasid(struct amdgpu_device *adev,
 	uint32_t seq;
 	uint16_t queried_pasid;
 	bool ret;
+	u32 usec_timeout = amdgpu_sriov_vf(adev) ? SRIOV_USEC_TIMEOUT : adev->usec_timeout;
 	struct amdgpu_ring *ring = &adev->gfx.kiq.ring;
 	struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 
@@ -389,7 +390,7 @@ static int gmc_v10_0_flush_gpu_tlb_pasid(struct amdgpu_device *adev,
 
 		amdgpu_ring_commit(ring);
 		spin_unlock(&adev->gfx.kiq.ring_lock);
-		r = amdgpu_fence_wait_polling(ring, seq, adev->usec_timeout);
+		r = amdgpu_fence_wait_polling(ring, seq, usec_timeout);
 		if (r < 1) {
 			dev_err(adev->dev, "wait for kiq fence error: %ld.\n", r);
 			return -ETIME;
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 3a864041968f..1673bf3bae55 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -839,6 +839,7 @@ static int gmc_v9_0_flush_gpu_tlb_pasid(struct amdgpu_device *adev,
 	uint32_t seq;
 	uint16_t queried_pasid;
 	bool ret;
+	u32 usec_timeout = amdgpu_sriov_vf(adev) ? SRIOV_USEC_TIMEOUT : adev->usec_timeout;
 	struct amdgpu_ring *ring = &adev->gfx.kiq.ring;
 	struct amdgpu_kiq *kiq = &adev->gfx.kiq;
 
@@ -878,7 +879,7 @@ static int gmc_v9_0_flush_gpu_tlb_pasid(struct amdgpu_device *adev,
 
 		amdgpu_ring_commit(ring);
 		spin_unlock(&adev->gfx.kiq.ring_lock);
-		r = amdgpu_fence_wait_polling(ring, seq, adev->usec_timeout);
+		r = amdgpu_fence_wait_polling(ring, seq, usec_timeout);
 		if (r < 1) {
 			dev_err(adev->dev, "wait for kiq fence error: %ld.\n", r);
 			up_read(&adev->reset_sem);
diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c b/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c
index bae3a146b2cc..89cc852cb27c 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_clock_source.c
@@ -546,9 +546,11 @@ static void dce112_get_pix_clk_dividers_helper (
 		switch (pix_clk_params->color_depth) {
 		case COLOR_DEPTH_101010:
 			actual_pixel_clock_100hz = (actual_pixel_clock_100hz * 5) >> 2;
+			actual_pixel_clock_100hz -= actual_pixel_clock_100hz % 10;
 			break;
 		case COLOR_DEPTH_121212:
 			actual_pixel_clock_100hz = (actual_pixel_clock_100hz * 6) >> 2;
+			actual_pixel_clock_100hz -= actual_pixel_clock_100hz % 10;
 			break;
 		case COLOR_DEPTH_161616:
 			actual_pixel_clock_100hz = actual_pixel_clock_100hz * 2;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
index 3fcd408e9103..855682590c1b 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
@@ -125,6 +125,12 @@ struct mpcc *mpc1_get_mpcc_for_dpp(struct mpc_tree *tree, int dpp_id)
 	while (tmp_mpcc != NULL) {
 		if (tmp_mpcc->dpp_id == dpp_id)
 			return tmp_mpcc;
+
+		/* avoid circular linked list */
+		ASSERT(tmp_mpcc != tmp_mpcc->mpcc_bot);
+		if (tmp_mpcc == tmp_mpcc->mpcc_bot)
+			break;
+
 		tmp_mpcc = tmp_mpcc->mpcc_bot;
 	}
 	return NULL;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c
index 800be2693fac..963d72f96dca 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_optc.c
@@ -464,6 +464,11 @@ void optc1_enable_optc_clock(struct timing_generator *optc, bool enable)
 				OTG_CLOCK_ON, 1,
 				1, 1000);
 	} else  {
+
+		//last chance to clear underflow, otherwise, it will always there due to clock is off.
+		if (optc->funcs->is_optc_underflow_occurred(optc) == true)
+			optc->funcs->clear_optc_underflow(optc);
+
 		REG_UPDATE_2(OTG_CLOCK_CONTROL,
 				OTG_CLOCK_GATE_DIS, 0,
 				OTG_CLOCK_EN, 0);
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_mpc.c b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_mpc.c
index 99cc095dc33c..a701ea56c0aa 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_mpc.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_mpc.c
@@ -533,6 +533,12 @@ struct mpcc *mpc2_get_mpcc_for_dpp(struct mpc_tree *tree, int dpp_id)
 	while (tmp_mpcc != NULL) {
 		if (tmp_mpcc->dpp_id == 0xf || tmp_mpcc->dpp_id == dpp_id)
 			return tmp_mpcc;
+
+		/* avoid circular linked list */
+		ASSERT(tmp_mpcc != tmp_mpcc->mpcc_bot);
+		if (tmp_mpcc == tmp_mpcc->mpcc_bot)
+			break;
+
 		tmp_mpcc = tmp_mpcc->mpcc_bot;
 	}
 	return NULL;
diff --git a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hubp.c b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hubp.c
index af462fe4260d..b0fd8859bd2f 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hubp.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn30/dcn30_hubp.c
@@ -86,7 +86,7 @@ bool hubp3_program_surface_flip_and_addr(
 			VMID, address->vmid);
 
 	if (address->type == PLN_ADDR_TYPE_GRPH_STEREO) {
-		REG_UPDATE(DCSURF_FLIP_CONTROL, SURFACE_FLIP_MODE_FOR_STEREOSYNC, 0x1);
+		REG_UPDATE(DCSURF_FLIP_CONTROL, SURFACE_FLIP_MODE_FOR_STEREOSYNC, 0);
 		REG_UPDATE(DCSURF_FLIP_CONTROL, SURFACE_FLIP_IN_STEREOSYNC, 0x1);
 
 	} else {
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
index 8556c229ff59..49d7fa1d0842 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
@@ -2759,6 +2759,7 @@ static const struct pptable_funcs sienna_cichlid_ppt_funcs = {
 	.dump_pptable = sienna_cichlid_dump_pptable,
 	.init_microcode = smu_v11_0_init_microcode,
 	.load_microcode = smu_v11_0_load_microcode,
+	.fini_microcode = smu_v11_0_fini_microcode,
 	.init_smc_tables = sienna_cichlid_init_smc_tables,
 	.fini_smc_tables = smu_v11_0_fini_smc_tables,
 	.init_power = smu_v11_0_init_power,
diff --git a/drivers/hid/hid-steam.c b/drivers/hid/hid-steam.c
index a3b151b29bd7..fc616db4231b 100644
--- a/drivers/hid/hid-steam.c
+++ b/drivers/hid/hid-steam.c
@@ -134,6 +134,11 @@ static int steam_recv_report(struct steam_device *steam,
 	int ret;
 
 	r = steam->hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0];
+	if (!r) {
+		hid_err(steam->hdev, "No HID_FEATURE_REPORT submitted -  nothing to read\n");
+		return -EINVAL;
+	}
+
 	if (hid_report_len(r) < 64)
 		return -EINVAL;
 
@@ -165,6 +170,11 @@ static int steam_send_report(struct steam_device *steam,
 	int ret;
 
 	r = steam->hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[0];
+	if (!r) {
+		hid_err(steam->hdev, "No HID_FEATURE_REPORT submitted -  nothing to read\n");
+		return -EINVAL;
+	}
+
 	if (hid_report_len(r) < 64)
 		return -EINVAL;
 
diff --git a/drivers/hid/hidraw.c b/drivers/hid/hidraw.c
index 2eee5e31c2b7..fade7fcf6a14 100644
--- a/drivers/hid/hidraw.c
+++ b/drivers/hid/hidraw.c
@@ -346,10 +346,13 @@ static int hidraw_release(struct inode * inode, struct file * file)
 	unsigned int minor = iminor(inode);
 	struct hidraw_list *list = file->private_data;
 	unsigned long flags;
+	int i;
 
 	mutex_lock(&minors_lock);
 
 	spin_lock_irqsave(&hidraw_table[minor]->list_lock, flags);
+	for (i = list->tail; i < list->head; i++)
+		kfree(list->buffer[i].value);
 	list_del(&list->node);
 	spin_unlock_irqrestore(&hidraw_table[minor]->list_lock, flags);
 	kfree(list);
diff --git a/drivers/media/usb/pvrusb2/pvrusb2-hdw.c b/drivers/media/usb/pvrusb2/pvrusb2-hdw.c
index fccd1798445d..d22ce328a279 100644
--- a/drivers/media/usb/pvrusb2/pvrusb2-hdw.c
+++ b/drivers/media/usb/pvrusb2/pvrusb2-hdw.c
@@ -2610,6 +2610,7 @@ struct pvr2_hdw *pvr2_hdw_create(struct usb_interface *intf,
 		del_timer_sync(&hdw->encoder_run_timer);
 		del_timer_sync(&hdw->encoder_wait_timer);
 		flush_work(&hdw->workpoll);
+		v4l2_device_unregister(&hdw->v4l2_dev);
 		usb_free_urb(hdw->ctl_read_urb);
 		usb_free_urb(hdw->ctl_write_urb);
 		kfree(hdw->ctl_read_buffer);
diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index f5c965da9501..d71c113f428f 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -2293,6 +2293,9 @@ static void msdc_cqe_disable(struct mmc_host *mmc, bool recovery)
 	/* disable busy check */
 	sdr_clr_bits(host->base + MSDC_PATCH_BIT1, MSDC_PB1_BUSY_CHECK_SEL);
 
+	val = readl(host->base + MSDC_INT);
+	writel(val, host->base + MSDC_INT);
+
 	if (recovery) {
 		sdr_set_field(host->base + MSDC_DMA_CTRL,
 			      MSDC_DMA_CTRL_STOP, 1);
@@ -2693,11 +2696,14 @@ static int __maybe_unused msdc_suspend(struct device *dev)
 {
 	struct mmc_host *mmc = dev_get_drvdata(dev);
 	int ret;
+	u32 val;
 
 	if (mmc->caps2 & MMC_CAP2_CQE) {
 		ret = cqhci_suspend(mmc);
 		if (ret)
 			return ret;
+		val = readl(((struct msdc_host *)mmc_priv(mmc))->base + MSDC_INT);
+		writel(val, ((struct msdc_host *)mmc_priv(mmc))->base + MSDC_INT);
 	}
 
 	return pm_runtime_force_suspend(dev);
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index 5ae81f2df45f..3779b264dbec 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -222,8 +222,15 @@ static int get_port_device_capability(struct pci_dev *dev)
 
 #ifdef CONFIG_PCIEAER
 	if (dev->aer_cap && pci_aer_available() &&
-	    (pcie_ports_native || host->native_aer))
+	    (pcie_ports_native || host->native_aer)) {
 		services |= PCIE_PORT_SERVICE_AER;
+
+		/*
+		 * Disable AER on this port in case it's been enabled by the
+		 * BIOS (the AER service driver will enable it when necessary).
+		 */
+		pci_disable_pcie_error_reporting(dev);
+	}
 #endif
 
 	/*
diff --git a/drivers/video/fbdev/pm2fb.c b/drivers/video/fbdev/pm2fb.c
index 0642555289e0..c12d46e28359 100644
--- a/drivers/video/fbdev/pm2fb.c
+++ b/drivers/video/fbdev/pm2fb.c
@@ -616,6 +616,11 @@ static int pm2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
 		return -EINVAL;
 	}
 
+	if (!var->pixclock) {
+		DPRINTK("pixclock is zero\n");
+		return -EINVAL;
+	}
+
 	if (PICOS2KHZ(var->pixclock) > PM2_MAX_PIXCLOCK) {
 		DPRINTK("pixclock too high (%ldKHz)\n",
 			PICOS2KHZ(var->pixclock));
diff --git a/fs/io_uring.c b/fs/io_uring.c
index a952288b2ab8..9654b60a06a5 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -5198,6 +5198,11 @@ static __poll_t __io_arm_poll_handler(struct io_kiocb *req,
 	struct io_ring_ctx *ctx = req->ctx;
 	bool cancel = false;
 
+	if (req->file->f_op->may_pollfree) {
+		spin_lock_irq(&ctx->completion_lock);
+		return -EOPNOTSUPP;
+	}
+
 	INIT_HLIST_NODE(&req->hash_node);
 	io_init_poll_iocb(poll, mask, wake_func);
 	poll->file = req->file;
diff --git a/fs/signalfd.c b/fs/signalfd.c
index b94fb5f81797..41dc597b78cc 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -248,6 +248,7 @@ static const struct file_operations signalfd_fops = {
 	.poll		= signalfd_poll,
 	.read		= signalfd_read,
 	.llseek		= noop_llseek,
+	.may_pollfree	= true,
 };
 
 static int do_signalfd4(int ufd, sigset_t *mask, int flags)
diff --git a/fs/xfs/xfs_filestream.c b/fs/xfs/xfs_filestream.c
index db23e455eb91..bc41ec0c483d 100644
--- a/fs/xfs/xfs_filestream.c
+++ b/fs/xfs/xfs_filestream.c
@@ -128,11 +128,12 @@ xfs_filestream_pick_ag(
 		if (!pag->pagf_init) {
 			err = xfs_alloc_pagf_init(mp, NULL, ag, trylock);
 			if (err) {
-				xfs_perag_put(pag);
-				if (err != -EAGAIN)
+				if (err != -EAGAIN) {
+					xfs_perag_put(pag);
 					return err;
+				}
 				/* Couldn't lock the AGF, skip this AG. */
-				continue;
+				goto next_ag;
 			}
 		}
 
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index ef1d5bb88b93..775f833146e3 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -376,46 +376,36 @@ xfs_reserve_blocks(
 	 * If the request is larger than the current reservation, reserve the
 	 * blocks before we update the reserve counters. Sample m_fdblocks and
 	 * perform a partial reservation if the request exceeds free space.
+	 *
+	 * The code below estimates how many blocks it can request from
+	 * fdblocks to stash in the reserve pool.  This is a classic TOCTOU
+	 * race since fdblocks updates are not always coordinated via
+	 * m_sb_lock.  Set the reserve size even if there's not enough free
+	 * space to fill it because mod_fdblocks will refill an undersized
+	 * reserve when it can.
 	 */
-	error = -ENOSPC;
-	do {
-		free = percpu_counter_sum(&mp->m_fdblocks) -
-						mp->m_alloc_set_aside;
-		if (free <= 0)
-			break;
-
-		delta = request - mp->m_resblks;
-		lcounter = free - delta;
-		if (lcounter < 0)
-			/* We can't satisfy the request, just get what we can */
-			fdblks_delta = free;
-		else
-			fdblks_delta = delta;
-
+	free = percpu_counter_sum(&mp->m_fdblocks) -
+						xfs_fdblocks_unavailable(mp);
+	delta = request - mp->m_resblks;
+	mp->m_resblks = request;
+	if (delta > 0 && free > 0) {
 		/*
 		 * We'll either succeed in getting space from the free block
-		 * count or we'll get an ENOSPC. If we get a ENOSPC, it means
-		 * things changed while we were calculating fdblks_delta and so
-		 * we should try again to see if there is anything left to
-		 * reserve.
+		 * count or we'll get an ENOSPC.  Don't set the reserved flag
+		 * here - we don't want to reserve the extra reserve blocks
+		 * from the reserve.
 		 *
-		 * Don't set the reserved flag here - we don't want to reserve
-		 * the extra reserve blocks from the reserve.....
+		 * The desired reserve size can change after we drop the lock.
+		 * Use mod_fdblocks to put the space into the reserve or into
+		 * fdblocks as appropriate.
 		 */
+		fdblks_delta = min(free, delta);
 		spin_unlock(&mp->m_sb_lock);
 		error = xfs_mod_fdblocks(mp, -fdblks_delta, 0);
+		if (!error)
+			xfs_mod_fdblocks(mp, fdblks_delta, 0);
 		spin_lock(&mp->m_sb_lock);
-	} while (error == -ENOSPC);
-
-	/*
-	 * Update the reserve counters if blocks have been successfully
-	 * allocated.
-	 */
-	if (!error && fdblks_delta) {
-		mp->m_resblks += fdblks_delta;
-		mp->m_resblks_avail += fdblks_delta;
 	}
-
 out:
 	if (outval) {
 		outval->resblks = mp->m_resblks;
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index dfa429b77ee2..3a6bc9dc11b5 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -406,6 +406,14 @@ extern int	xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
 				     xfs_agnumber_t *maxagi);
 extern void	xfs_unmountfs(xfs_mount_t *);
 
+/* Accessor added for 5.10.y backport */
+static inline uint64_t
+xfs_fdblocks_unavailable(
+	struct xfs_mount	*mp)
+{
+	return mp->m_alloc_set_aside;
+}
+
 extern int	xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta,
 				 bool reserved);
 extern int	xfs_mod_frextents(struct xfs_mount *mp, int64_t delta);
diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index fe45b0c3970c..288ea38c43ad 100644
--- a/fs/xfs/xfs_trans_dquot.c
+++ b/fs/xfs/xfs_trans_dquot.c
@@ -615,7 +615,6 @@ xfs_dqresv_check(
 			return QUOTA_NL_ISOFTLONGWARN;
 		}
 
-		res->warnings++;
 		return QUOTA_NL_ISOFTWARN;
 	}
 
diff --git a/include/linux/fs.h b/include/linux/fs.h
index 42d246a94228..c8f887641878 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1859,6 +1859,7 @@ struct file_operations {
 				   struct file *file_out, loff_t pos_out,
 				   loff_t len, unsigned int remap_flags);
 	int (*fadvise)(struct file *, loff_t, loff_t, int);
+	bool may_pollfree;
 } __randomize_layout;
 
 struct inode_operations {
diff --git a/include/linux/rmap.h b/include/linux/rmap.h
index 8d04e7deedc6..297744ea4dd0 100644
--- a/include/linux/rmap.h
+++ b/include/linux/rmap.h
@@ -39,12 +39,15 @@ struct anon_vma {
 	atomic_t refcount;
 
 	/*
-	 * Count of child anon_vmas and VMAs which points to this anon_vma.
+	 * Count of child anon_vmas. Equals to the count of all anon_vmas that
+	 * have ->parent pointing to this one, including itself.
 	 *
 	 * This counter is used for making decision about reusing anon_vma
 	 * instead of forking new one. See comments in function anon_vma_clone.
 	 */
-	unsigned degree;
+	unsigned long num_children;
+	/* Count of VMAs whose ->anon_vma pointer points to this object. */
+	unsigned long num_active_vmas;
 
 	struct anon_vma *parent;	/* Parent of this anon_vma */
 
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index acbf1875ad50..61fc053a4a4e 100644
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -2222,6 +2222,14 @@ static inline void skb_set_tail_pointer(struct sk_buff *skb, const int offset)
 
 #endif /* NET_SKBUFF_DATA_USES_OFFSET */
 
+static inline void skb_assert_len(struct sk_buff *skb)
+{
+#ifdef CONFIG_DEBUG_NET
+	if (WARN_ONCE(!skb->len, "%s\n", __func__))
+		DO_ONCE_LITE(skb_dump, KERN_ERR, skb, false);
+#endif /* CONFIG_DEBUG_NET */
+}
+
 /*
  *	Add data to an sk_buff
  */
diff --git a/include/linux/skmsg.h b/include/linux/skmsg.h
index 822c048934e3..1138dd3071db 100644
--- a/include/linux/skmsg.h
+++ b/include/linux/skmsg.h
@@ -281,7 +281,8 @@ static inline void sk_msg_sg_copy_clear(struct sk_msg *msg, u32 start)
 
 static inline struct sk_psock *sk_psock(const struct sock *sk)
 {
-	return rcu_dereference_sk_user_data(sk);
+	return __rcu_dereference_sk_user_data_with_flags(sk,
+							 SK_USER_DATA_PSOCK);
 }
 
 static inline void sk_psock_queue_msg(struct sk_psock *psock,
diff --git a/include/net/sock.h b/include/net/sock.h
index d31c2b9107e5..d53fb6437476 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -527,14 +527,26 @@ enum sk_pacing {
 	SK_PACING_FQ		= 2,
 };
 
-/* Pointer stored in sk_user_data might not be suitable for copying
- * when cloning the socket. For instance, it can point to a reference
- * counted object. sk_user_data bottom bit is set if pointer must not
- * be copied.
+/* flag bits in sk_user_data
+ *
+ * - SK_USER_DATA_NOCOPY:      Pointer stored in sk_user_data might
+ *   not be suitable for copying when cloning the socket. For instance,
+ *   it can point to a reference counted object. sk_user_data bottom
+ *   bit is set if pointer must not be copied.
+ *
+ * - SK_USER_DATA_BPF:         Mark whether sk_user_data field is
+ *   managed/owned by a BPF reuseport array. This bit should be set
+ *   when sk_user_data's sk is added to the bpf's reuseport_array.
+ *
+ * - SK_USER_DATA_PSOCK:       Mark whether pointer stored in
+ *   sk_user_data points to psock type. This bit should be set
+ *   when sk_user_data is assigned to a psock object.
  */
 #define SK_USER_DATA_NOCOPY	1UL
-#define SK_USER_DATA_BPF	2UL	/* Managed by BPF */
-#define SK_USER_DATA_PTRMASK	~(SK_USER_DATA_NOCOPY | SK_USER_DATA_BPF)
+#define SK_USER_DATA_BPF	2UL
+#define SK_USER_DATA_PSOCK	4UL
+#define SK_USER_DATA_PTRMASK	~(SK_USER_DATA_NOCOPY | SK_USER_DATA_BPF |\
+				  SK_USER_DATA_PSOCK)
 
 /**
  * sk_user_data_is_nocopy - Test if sk_user_data pointer must not be copied
@@ -547,24 +559,40 @@ static inline bool sk_user_data_is_nocopy(const struct sock *sk)
 
 #define __sk_user_data(sk) ((*((void __rcu **)&(sk)->sk_user_data)))
 
+/**
+ * __rcu_dereference_sk_user_data_with_flags - return the pointer
+ * only if argument flags all has been set in sk_user_data. Otherwise
+ * return NULL
+ *
+ * @sk: socket
+ * @flags: flag bits
+ */
+static inline void *
+__rcu_dereference_sk_user_data_with_flags(const struct sock *sk,
+					  uintptr_t flags)
+{
+	uintptr_t sk_user_data = (uintptr_t)rcu_dereference(__sk_user_data(sk));
+
+	WARN_ON_ONCE(flags & SK_USER_DATA_PTRMASK);
+
+	if ((sk_user_data & flags) == flags)
+		return (void *)(sk_user_data & SK_USER_DATA_PTRMASK);
+	return NULL;
+}
+
 #define rcu_dereference_sk_user_data(sk)				\
+	__rcu_dereference_sk_user_data_with_flags(sk, 0)
+#define __rcu_assign_sk_user_data_with_flags(sk, ptr, flags)		\
 ({									\
-	void *__tmp = rcu_dereference(__sk_user_data((sk)));		\
-	(void *)((uintptr_t)__tmp & SK_USER_DATA_PTRMASK);		\
-})
-#define rcu_assign_sk_user_data(sk, ptr)				\
-({									\
-	uintptr_t __tmp = (uintptr_t)(ptr);				\
-	WARN_ON_ONCE(__tmp & ~SK_USER_DATA_PTRMASK);			\
-	rcu_assign_pointer(__sk_user_data((sk)), __tmp);		\
-})
-#define rcu_assign_sk_user_data_nocopy(sk, ptr)				\
-({									\
-	uintptr_t __tmp = (uintptr_t)(ptr);				\
-	WARN_ON_ONCE(__tmp & ~SK_USER_DATA_PTRMASK);			\
+	uintptr_t __tmp1 = (uintptr_t)(ptr),				\
+		  __tmp2 = (uintptr_t)(flags);				\
+	WARN_ON_ONCE(__tmp1 & ~SK_USER_DATA_PTRMASK);			\
+	WARN_ON_ONCE(__tmp2 & SK_USER_DATA_PTRMASK);			\
 	rcu_assign_pointer(__sk_user_data((sk)),			\
-			   __tmp | SK_USER_DATA_NOCOPY);		\
+			   __tmp1 | __tmp2);				\
 })
+#define rcu_assign_sk_user_data(sk, ptr)				\
+	__rcu_assign_sk_user_data_with_flags(sk, ptr, 0)
 
 /*
  * SK_CAN_REUSE and SK_NO_REUSE on a socket mean that the socket is OK
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index a397042e4660..a93407da0ae1 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -1786,11 +1786,12 @@ static struct kprobe *__disable_kprobe(struct kprobe *p)
 		/* Try to disarm and disable this/parent probe */
 		if (p == orig_p || aggr_kprobe_disabled(orig_p)) {
 			/*
-			 * If kprobes_all_disarmed is set, orig_p
-			 * should have already been disarmed, so
-			 * skip unneed disarming process.
+			 * Don't be lazy here.  Even if 'kprobes_all_disarmed'
+			 * is false, 'orig_p' might not have been armed yet.
+			 * Note arm_all_kprobes() __tries__ to arm all kprobes
+			 * on the best effort basis.
 			 */
-			if (!kprobes_all_disarmed) {
+			if (!kprobes_all_disarmed && !kprobe_disabled(orig_p)) {
 				ret = disarm_kprobe(orig_p, true);
 				if (ret) {
 					p->flags &= ~KPROBE_FLAG_DISABLED;
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index a63713dcd05d..d868df6f13c8 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2899,6 +2899,16 @@ int ftrace_startup(struct ftrace_ops *ops, int command)
 
 	ftrace_startup_enable(command);
 
+	/*
+	 * If ftrace is in an undefined state, we just remove ops from list
+	 * to prevent the NULL pointer, instead of totally rolling it back and
+	 * free trampoline, because those actions could cause further damage.
+	 */
+	if (unlikely(ftrace_disabled)) {
+		__unregister_ftrace_function(ops);
+		return -ENODEV;
+	}
+
 	ops->flags &= ~FTRACE_OPS_FL_ADDING;
 
 	return 0;
diff --git a/lib/crypto/Kconfig b/lib/crypto/Kconfig
index 2082af43d51f..0717a0dcefed 100644
--- a/lib/crypto/Kconfig
+++ b/lib/crypto/Kconfig
@@ -33,7 +33,6 @@ config CRYPTO_ARCH_HAVE_LIB_CHACHA
 
 config CRYPTO_LIB_CHACHA_GENERIC
 	tristate
-	select XOR_BLOCKS
 	help
 	  This symbol can be depended upon by arch implementations of the
 	  ChaCha library interface that require the generic code as a
diff --git a/lib/vdso/gettimeofday.c b/lib/vdso/gettimeofday.c
index 2919f1698140..c6f6dee08746 100644
--- a/lib/vdso/gettimeofday.c
+++ b/lib/vdso/gettimeofday.c
@@ -46,8 +46,8 @@ static inline bool vdso_cycles_ok(u64 cycles)
 #endif
 
 #ifdef CONFIG_TIME_NS
-static int do_hres_timens(const struct vdso_data *vdns, clockid_t clk,
-			  struct __kernel_timespec *ts)
+static __always_inline int do_hres_timens(const struct vdso_data *vdns, clockid_t clk,
+					  struct __kernel_timespec *ts)
 {
 	const struct vdso_data *vd = __arch_get_timens_vdso_data();
 	const struct timens_offset *offs = &vdns->offset[clk];
@@ -97,8 +97,8 @@ static __always_inline const struct vdso_data *__arch_get_timens_vdso_data(void)
 	return NULL;
 }
 
-static int do_hres_timens(const struct vdso_data *vdns, clockid_t clk,
-			  struct __kernel_timespec *ts)
+static __always_inline int do_hres_timens(const struct vdso_data *vdns, clockid_t clk,
+					  struct __kernel_timespec *ts)
 {
 	return -EINVAL;
 }
@@ -159,8 +159,8 @@ static __always_inline int do_hres(const struct vdso_data *vd, clockid_t clk,
 }
 
 #ifdef CONFIG_TIME_NS
-static int do_coarse_timens(const struct vdso_data *vdns, clockid_t clk,
-			    struct __kernel_timespec *ts)
+static __always_inline int do_coarse_timens(const struct vdso_data *vdns, clockid_t clk,
+					    struct __kernel_timespec *ts)
 {
 	const struct vdso_data *vd = __arch_get_timens_vdso_data();
 	const struct vdso_timestamp *vdso_ts = &vd->basetime[clk];
@@ -188,8 +188,8 @@ static int do_coarse_timens(const struct vdso_data *vdns, clockid_t clk,
 	return 0;
 }
 #else
-static int do_coarse_timens(const struct vdso_data *vdns, clockid_t clk,
-			    struct __kernel_timespec *ts)
+static __always_inline int do_coarse_timens(const struct vdso_data *vdns, clockid_t clk,
+					    struct __kernel_timespec *ts)
 {
 	return -1;
 }
diff --git a/mm/mmap.c b/mm/mmap.c
index a1ee93f55ceb..b69c9711bb26 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -2669,6 +2669,18 @@ static void unmap_region(struct mm_struct *mm,
 	tlb_gather_mmu(&tlb, mm, start, end);
 	update_hiwater_rss(mm);
 	unmap_vmas(&tlb, vma, start, end);
+
+	/*
+	 * Ensure we have no stale TLB entries by the time this mapping is
+	 * removed from the rmap.
+	 * Note that we don't have to worry about nested flushes here because
+	 * we're holding the mm semaphore for removing the mapping - so any
+	 * concurrent flush in this region has to be coming through the rmap,
+	 * and we synchronize against that using the rmap lock.
+	 */
+	if ((vma->vm_flags & (VM_PFNMAP|VM_MIXEDMAP)) != 0)
+		tlb_flush_mmu(&tlb);
+
 	free_pgtables(&tlb, vma, prev ? prev->vm_end : FIRST_USER_ADDRESS,
 				 next ? next->vm_start : USER_PGTABLES_CEILING);
 	tlb_finish_mmu(&tlb, start, end);
diff --git a/mm/rmap.c b/mm/rmap.c
index 44ad7bf2e563..e6f840be1890 100644
--- a/mm/rmap.c
+++ b/mm/rmap.c
@@ -89,7 +89,8 @@ static inline struct anon_vma *anon_vma_alloc(void)
 	anon_vma = kmem_cache_alloc(anon_vma_cachep, GFP_KERNEL);
 	if (anon_vma) {
 		atomic_set(&anon_vma->refcount, 1);
-		anon_vma->degree = 1;	/* Reference for first vma */
+		anon_vma->num_children = 0;
+		anon_vma->num_active_vmas = 0;
 		anon_vma->parent = anon_vma;
 		/*
 		 * Initialise the anon_vma root to point to itself. If called
@@ -197,6 +198,7 @@ int __anon_vma_prepare(struct vm_area_struct *vma)
 		anon_vma = anon_vma_alloc();
 		if (unlikely(!anon_vma))
 			goto out_enomem_free_avc;
+		anon_vma->num_children++; /* self-parent link for new root */
 		allocated = anon_vma;
 	}
 
@@ -206,8 +208,7 @@ int __anon_vma_prepare(struct vm_area_struct *vma)
 	if (likely(!vma->anon_vma)) {
 		vma->anon_vma = anon_vma;
 		anon_vma_chain_link(vma, avc, anon_vma);
-		/* vma reference or self-parent link for new root */
-		anon_vma->degree++;
+		anon_vma->num_active_vmas++;
 		allocated = NULL;
 		avc = NULL;
 	}
@@ -292,19 +293,19 @@ int anon_vma_clone(struct vm_area_struct *dst, struct vm_area_struct *src)
 		anon_vma_chain_link(dst, avc, anon_vma);
 
 		/*
-		 * Reuse existing anon_vma if its degree lower than two,
-		 * that means it has no vma and only one anon_vma child.
+		 * Reuse existing anon_vma if it has no vma and only one
+		 * anon_vma child.
 		 *
-		 * Do not chose parent anon_vma, otherwise first child
-		 * will always reuse it. Root anon_vma is never reused:
+		 * Root anon_vma is never reused:
 		 * it has self-parent reference and at least one child.
 		 */
 		if (!dst->anon_vma && src->anon_vma &&
-		    anon_vma != src->anon_vma && anon_vma->degree < 2)
+		    anon_vma->num_children < 2 &&
+		    anon_vma->num_active_vmas == 0)
 			dst->anon_vma = anon_vma;
 	}
 	if (dst->anon_vma)
-		dst->anon_vma->degree++;
+		dst->anon_vma->num_active_vmas++;
 	unlock_anon_vma_root(root);
 	return 0;
 
@@ -354,6 +355,7 @@ int anon_vma_fork(struct vm_area_struct *vma, struct vm_area_struct *pvma)
 	anon_vma = anon_vma_alloc();
 	if (!anon_vma)
 		goto out_error;
+	anon_vma->num_active_vmas++;
 	avc = anon_vma_chain_alloc(GFP_KERNEL);
 	if (!avc)
 		goto out_error_free_anon_vma;
@@ -374,7 +376,7 @@ int anon_vma_fork(struct vm_area_struct *vma, struct vm_area_struct *pvma)
 	vma->anon_vma = anon_vma;
 	anon_vma_lock_write(anon_vma);
 	anon_vma_chain_link(vma, avc, anon_vma);
-	anon_vma->parent->degree++;
+	anon_vma->parent->num_children++;
 	anon_vma_unlock_write(anon_vma);
 
 	return 0;
@@ -406,7 +408,7 @@ void unlink_anon_vmas(struct vm_area_struct *vma)
 		 * to free them outside the lock.
 		 */
 		if (RB_EMPTY_ROOT(&anon_vma->rb_root.rb_root)) {
-			anon_vma->parent->degree--;
+			anon_vma->parent->num_children--;
 			continue;
 		}
 
@@ -414,7 +416,7 @@ void unlink_anon_vmas(struct vm_area_struct *vma)
 		anon_vma_chain_free(avc);
 	}
 	if (vma->anon_vma)
-		vma->anon_vma->degree--;
+		vma->anon_vma->num_active_vmas--;
 	unlock_anon_vma_root(root);
 
 	/*
@@ -425,7 +427,8 @@ void unlink_anon_vmas(struct vm_area_struct *vma)
 	list_for_each_entry_safe(avc, next, &vma->anon_vma_chain, same_vma) {
 		struct anon_vma *anon_vma = avc->anon_vma;
 
-		VM_WARN_ON(anon_vma->degree);
+		VM_WARN_ON(anon_vma->num_children);
+		VM_WARN_ON(anon_vma->num_active_vmas);
 		put_anon_vma(anon_vma);
 
 		list_del(&avc->same_vma);
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index 88980015ba81..0c38af2ff209 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -1988,11 +1988,11 @@ static struct l2cap_chan *l2cap_global_chan_by_psm(int state, __le16 psm,
 			src_match = !bacmp(&c->src, src);
 			dst_match = !bacmp(&c->dst, dst);
 			if (src_match && dst_match) {
-				c = l2cap_chan_hold_unless_zero(c);
-				if (c) {
-					read_unlock(&chan_list_lock);
-					return c;
-				}
+				if (!l2cap_chan_hold_unless_zero(c))
+					continue;
+
+				read_unlock(&chan_list_lock);
+				return c;
 			}
 
 			/* Closest match */
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c
index f8b231bbbe38..2983e926fe3c 100644
--- a/net/bpf/test_run.c
+++ b/net/bpf/test_run.c
@@ -441,6 +441,9 @@ static int convert___skb_to_skb(struct sk_buff *skb, struct __sk_buff *__skb)
 {
 	struct qdisc_skb_cb *cb = (struct qdisc_skb_cb *)skb->cb;
 
+	if (!skb->len)
+		return -EINVAL;
+
 	if (!__skb)
 		return 0;
 
diff --git a/net/core/dev.c b/net/core/dev.c
index 8355cc5e11a9..34b5aab42b91 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -4097,6 +4097,7 @@ static int __dev_queue_xmit(struct sk_buff *skb, struct net_device *sb_dev)
 	bool again = false;
 
 	skb_reset_mac_header(skb);
+	skb_assert_len(skb);
 
 	if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_SCHED_TSTAMP))
 		__skb_tstamp_tx(skb, NULL, skb->sk, SCM_TSTAMP_SCHED);
diff --git a/net/core/neighbour.c b/net/core/neighbour.c
index 52a1c8725337..434c5aab83ea 100644
--- a/net/core/neighbour.c
+++ b/net/core/neighbour.c
@@ -280,11 +280,26 @@ static int neigh_del_timer(struct neighbour *n)
 	return 0;
 }
 
-static void pneigh_queue_purge(struct sk_buff_head *list)
+static void pneigh_queue_purge(struct sk_buff_head *list, struct net *net)
 {
+	struct sk_buff_head tmp;
+	unsigned long flags;
 	struct sk_buff *skb;
 
-	while ((skb = skb_dequeue(list)) != NULL) {
+	skb_queue_head_init(&tmp);
+	spin_lock_irqsave(&list->lock, flags);
+	skb = skb_peek(list);
+	while (skb != NULL) {
+		struct sk_buff *skb_next = skb_peek_next(skb, list);
+		if (net == NULL || net_eq(dev_net(skb->dev), net)) {
+			__skb_unlink(skb, list);
+			__skb_queue_tail(&tmp, skb);
+		}
+		skb = skb_next;
+	}
+	spin_unlock_irqrestore(&list->lock, flags);
+
+	while ((skb = __skb_dequeue(&tmp))) {
 		dev_put(skb->dev);
 		kfree_skb(skb);
 	}
@@ -358,9 +373,9 @@ static int __neigh_ifdown(struct neigh_table *tbl, struct net_device *dev,
 	write_lock_bh(&tbl->lock);
 	neigh_flush_dev(tbl, dev, skip_perm);
 	pneigh_ifdown_and_unlock(tbl, dev);
-
-	del_timer_sync(&tbl->proxy_timer);
-	pneigh_queue_purge(&tbl->proxy_queue);
+	pneigh_queue_purge(&tbl->proxy_queue, dev_net(dev));
+	if (skb_queue_empty_lockless(&tbl->proxy_queue))
+		del_timer_sync(&tbl->proxy_timer);
 	return 0;
 }
 
@@ -1743,7 +1758,7 @@ int neigh_table_clear(int index, struct neigh_table *tbl)
 	/* It is not clean... Fix it to unload IPv6 module safely */
 	cancel_delayed_work_sync(&tbl->gc_work);
 	del_timer_sync(&tbl->proxy_timer);
-	pneigh_queue_purge(&tbl->proxy_queue);
+	pneigh_queue_purge(&tbl->proxy_queue, NULL);
 	neigh_ifdown(tbl, NULL);
 	if (atomic_read(&tbl->entries))
 		pr_crit("neighbour leakage\n");
diff --git a/net/core/skmsg.c b/net/core/skmsg.c
index 545181a1ae04..bb4fbc60b272 100644
--- a/net/core/skmsg.c
+++ b/net/core/skmsg.c
@@ -612,7 +612,9 @@ struct sk_psock *sk_psock_init(struct sock *sk, int node)
 	sk_psock_set_state(psock, SK_PSOCK_TX_ENABLED);
 	refcount_set(&psock->refcnt, 1);
 
-	rcu_assign_sk_user_data_nocopy(sk, psock);
+	__rcu_assign_sk_user_data_with_flags(sk, psock,
+					     SK_USER_DATA_NOCOPY |
+					     SK_USER_DATA_PSOCK);
 	sock_hold(sk);
 
 out:
diff --git a/net/netfilter/Kconfig b/net/netfilter/Kconfig
index 6bafd3876aff..8bf70ce03f95 100644
--- a/net/netfilter/Kconfig
+++ b/net/netfilter/Kconfig
@@ -118,7 +118,6 @@ config NF_CONNTRACK_ZONES
 
 config NF_CONNTRACK_PROCFS
 	bool "Supply CT list in procfs (OBSOLETE)"
-	default y
 	depends on PROC_FS
 	help
 	This option enables for the list of known conntrack entries
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index 5ee600d108a0..b70b06e312bd 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -2986,8 +2986,8 @@ static int packet_snd(struct socket *sock, struct msghdr *msg, size_t len)
 	if (err)
 		goto out_free;
 
-	if (sock->type == SOCK_RAW &&
-	    !dev_validate_header(dev, skb->data, len)) {
+	if ((sock->type == SOCK_RAW &&
+	     !dev_validate_header(dev, skb->data, len)) || !skb->len) {
 		err = -EINVAL;
 		goto out_free;
 	}
diff --git a/scripts/Makefile.modpost b/scripts/Makefile.modpost
index 12a87be0fb44..42154b6df652 100644
--- a/scripts/Makefile.modpost
+++ b/scripts/Makefile.modpost
@@ -87,8 +87,7 @@ obj := $(KBUILD_EXTMOD)
 src := $(obj)
 
 # Include the module's Makefile to find KBUILD_EXTRA_SYMBOLS
-include $(if $(wildcard $(KBUILD_EXTMOD)/Kbuild), \
-             $(KBUILD_EXTMOD)/Kbuild, $(KBUILD_EXTMOD)/Makefile)
+include $(if $(wildcard $(src)/Kbuild), $(src)/Kbuild, $(src)/Makefile)
 
 # modpost option for external modules
 MODPOST += -e