Merge tag 'v6.6.47' into 6.6

This is the 6.6.47 stable release

Author: xanmod

Documentation/bpf/map_lpm_trie.rst

@@ -17,7 +17,7 @@ significant byte.
 
 LPM tries may be created with a maximum prefix length that is a multiple
 of 8, in the range from 8 to 2048. The key used for lookup and update
-operations is a ``struct bpf_lpm_trie_key``, extended by
+operations is a ``struct bpf_lpm_trie_key_u8``, extended by
 ``max_prefixlen/8`` bytes.
 
 - For IPv4 addresses the data length is 4 bytes

Documentation/mm/page_table_check.rst

@@ -14,14 +14,21 @@ Page table check performs extra verifications at the time when new pages become
 accessible from the userspace by getting their page table entries (PTEs PMDs
 etc.) added into the table.
 
-In case of detected corruption, the kernel is crashed. There is a small
+In case of most detected corruption, the kernel is crashed. There is a small
 performance and memory overhead associated with the page table check. Therefore,
 it is disabled by default, but can be optionally enabled on systems where the
 extra hardening outweighs the performance costs. Also, because page table check
 is synchronous, it can help with debugging double map memory corruption issues,
 by crashing kernel at the time wrong mapping occurs instead of later which is
 often the case with memory corruptions bugs.
 
+It can also be used to do page table entry checks over various flags, dump
+warnings when illegal combinations of entry flags are detected.  Currently,
+userfaultfd is the only user of such to sanity check wr-protect bit against
+any writable flags.  Illegal flag combinations will not directly cause data
+corruption in this case immediately, but that will cause read-only data to
+be writable, leading to corrupt when the page content is later modified.
+
 Double mapping detection logic
 ==============================
 

Makefile

@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
 VERSION = 6
 PATCHLEVEL = 6
-SUBLEVEL = 46
+SUBLEVEL = 47
 EXTRAVERSION =
 NAME = Hurr durr I'ma ninja sloth
 

arch/arm64/kvm/hyp/pgtable.c

@@ -523,7 +523,7 @@ static int hyp_unmap_walker(const struct kvm_pgtable_visit_ctx *ctx,
 
 		kvm_clear_pte(ctx->ptep);
 		dsb(ishst);
-		__tlbi_level(vae2is, __TLBI_VADDR(ctx->addr, 0), ctx->level);
+		__tlbi_level(vae2is, __TLBI_VADDR(ctx->addr, 0), 0);
 	} else {
 		if (ctx->end - ctx->addr < granule)
 			return -EINVAL;
@@ -861,9 +861,13 @@ static void stage2_unmap_put_pte(const struct kvm_pgtable_visit_ctx *ctx,
 	if (kvm_pte_valid(ctx->old)) {
 		kvm_clear_pte(ctx->ptep);
 
-		if (!stage2_unmap_defer_tlb_flush(pgt))
-			kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu,
-					ctx->addr, ctx->level);
+		if (kvm_pte_table(ctx->old, ctx->level)) {
+			kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu, ctx->addr,
+				     0);
+		} else if (!stage2_unmap_defer_tlb_flush(pgt)) {
+			kvm_call_hyp(__kvm_tlb_flush_vmid_ipa, mmu, ctx->addr,
+				     ctx->level);
+		}
 	}
 
 	mm_ops->put_page(ctx->ptep);

arch/loongarch/include/uapi/asm/unistd.h

@@ -1,4 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
+#define __ARCH_WANT_NEW_STAT
 #define __ARCH_WANT_SYS_CLONE
 #define __ARCH_WANT_SYS_CLONE3
 

arch/x86/include/asm/pgtable.h

@@ -387,23 +387,7 @@ static inline pte_t pte_wrprotect(pte_t pte)
 #ifdef CONFIG_HAVE_ARCH_USERFAULTFD_WP
 static inline int pte_uffd_wp(pte_t pte)
 {
-	bool wp = pte_flags(pte) & _PAGE_UFFD_WP;
-
-#ifdef CONFIG_DEBUG_VM
-	/*
-	 * Having write bit for wr-protect-marked present ptes is fatal,
-	 * because it means the uffd-wp bit will be ignored and write will
-	 * just go through.
-	 *
-	 * Use any chance of pgtable walking to verify this (e.g., when
-	 * page swapped out or being migrated for all purposes). It means
-	 * something is already wrong.  Tell the admin even before the
-	 * process crashes. We also nail it with wrong pgtable setup.
-	 */
-	WARN_ON_ONCE(wp && pte_write(pte));
-#endif
-
-	return wp;
+	return pte_flags(pte) & _PAGE_UFFD_WP;
 }
 
 static inline pte_t pte_mkuffd_wp(pte_t pte)

drivers/ata/libata-scsi.c

@@ -941,8 +941,19 @@ static void ata_gen_passthru_sense(struct ata_queued_cmd *qc)
 				   &sense_key, &asc, &ascq);
 		ata_scsi_set_sense(qc->dev, cmd, sense_key, asc, ascq);
 	} else {
-		/* ATA PASS-THROUGH INFORMATION AVAILABLE */
-		ata_scsi_set_sense(qc->dev, cmd, RECOVERED_ERROR, 0, 0x1D);
+		/*
+		 * ATA PASS-THROUGH INFORMATION AVAILABLE
+		 *
+		 * Note: we are supposed to call ata_scsi_set_sense(), which
+		 * respects the D_SENSE bit, instead of unconditionally
+		 * generating the sense data in descriptor format. However,
+		 * because hdparm, hddtemp, and udisks incorrectly assume sense
+		 * data in descriptor format, without even looking at the
+		 * RESPONSE CODE field in the returned sense data (to see which
+		 * format the returned sense data is in), we are stuck with
+		 * being bug compatible with older kernels.
+		 */
+		scsi_build_sense(cmd, 1, RECOVERED_ERROR, 0, 0x1D);
 	}
 }
 

drivers/isdn/mISDN/socket.c

@@ -401,23 +401,23 @@ data_sock_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
 }
 
 static int data_sock_setsockopt(struct socket *sock, int level, int optname,
-				sockptr_t optval, unsigned int len)
+				sockptr_t optval, unsigned int optlen)
 {
 	struct sock *sk = sock->sk;
 	int err = 0, opt = 0;
 
 	if (*debug & DEBUG_SOCKET)
 		printk(KERN_DEBUG "%s(%p, %d, %x, optval, %d)\n", __func__, sock,
-		       level, optname, len);
+		       level, optname, optlen);
 
 	lock_sock(sk);
 
 	switch (optname) {
 	case MISDN_TIME_STAMP:
-		if (copy_from_sockptr(&opt, optval, sizeof(int))) {
-			err = -EFAULT;
+		err = copy_safe_from_sockptr(&opt, sizeof(opt),
+					     optval, optlen);
+		if (err)
 			break;
-		}
 
 		if (opt)
 			_pms(sk)->cmask |= MISDN_TIME_STAMP;

drivers/media/usb/dvb-usb/dvb-usb-init.c

@@ -23,40 +23,11 @@ static int dvb_usb_force_pid_filter_usage;
 module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage, int, 0444);
 MODULE_PARM_DESC(force_pid_filter_usage, "force all dvb-usb-devices to use a PID filter, if any (default: 0).");
 
-static int dvb_usb_check_bulk_endpoint(struct dvb_usb_device *d, u8 endpoint)
-{
-	if (endpoint) {
-		int ret;
-
-		ret = usb_pipe_type_check(d->udev, usb_sndbulkpipe(d->udev, endpoint));
-		if (ret)
-			return ret;
-		ret = usb_pipe_type_check(d->udev, usb_rcvbulkpipe(d->udev, endpoint));
-		if (ret)
-			return ret;
-	}
-	return 0;
-}
-
-static void dvb_usb_clear_halt(struct dvb_usb_device *d, u8 endpoint)
-{
-	if (endpoint) {
-		usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, endpoint));
-		usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, endpoint));
-	}
-}
-
 static int dvb_usb_adapter_init(struct dvb_usb_device *d, short *adapter_nrs)
 {
 	struct dvb_usb_adapter *adap;
 	int ret, n, o;
 
-	ret = dvb_usb_check_bulk_endpoint(d, d->props.generic_bulk_ctrl_endpoint);
-	if (ret)
-		return ret;
-	ret = dvb_usb_check_bulk_endpoint(d, d->props.generic_bulk_ctrl_endpoint_response);
-	if (ret)
-		return ret;
 	for (n = 0; n < d->props.num_adapters; n++) {
 		adap = &d->adapter[n];
 		adap->dev = d;
@@ -132,8 +103,10 @@ static int dvb_usb_adapter_init(struct dvb_usb_device *d, short *adapter_nrs)
 	 * when reloading the driver w/o replugging the device
 	 * sometimes a timeout occurs, this helps
 	 */
-	dvb_usb_clear_halt(d, d->props.generic_bulk_ctrl_endpoint);
-	dvb_usb_clear_halt(d, d->props.generic_bulk_ctrl_endpoint_response);
+	if (d->props.generic_bulk_ctrl_endpoint != 0) {
+		usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
+		usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
+	}
 
 	return 0;
 

drivers/net/ppp/pppoe.c

@@ -1007,26 +1007,21 @@ static int pppoe_recvmsg(struct socket *sock, struct msghdr *m,
 	struct sk_buff *skb;
 	int error = 0;
 
-	if (sk->sk_state & PPPOX_BOUND) {
-		error = -EIO;
-		goto end;
-	}
+	if (sk->sk_state & PPPOX_BOUND)
+		return -EIO;
 
 	skb = skb_recv_datagram(sk, flags, &error);
-	if (error < 0)
-		goto end;
+	if (!skb)
+		return error;
 
-	if (skb) {
-		total_len = min_t(size_t, total_len, skb->len);
-		error = skb_copy_datagram_msg(skb, 0, m, total_len);
-		if (error == 0) {
-			consume_skb(skb);
-			return total_len;
-		}
+	total_len = min_t(size_t, total_len, skb->len);
+	error = skb_copy_datagram_msg(skb, 0, m, total_len);
+	if (error == 0) {
+		consume_skb(skb);
+		return total_len;
 	}
 
 	kfree_skb(skb);
-end:
 	return error;
 }
 

drivers/nvme/host/pci.c

@@ -2931,6 +2931,13 @@ static unsigned long check_vendor_combination_bug(struct pci_dev *pdev)
 			return NVME_QUIRK_FORCE_NO_SIMPLE_SUSPEND;
 	}
 
+	/*
+	 * NVMe SSD drops off the PCIe bus after system idle
+	 * for 10 hours on a Lenovo N60z board.
+	 */
+	if (dmi_match(DMI_BOARD_NAME, "LXKT-ZXEG-N6"))
+		return NVME_QUIRK_NO_APST;
+
 	return 0;
 }
 

fs/binfmt_flat.c

@@ -72,8 +72,10 @@
 
 #ifdef CONFIG_BINFMT_FLAT_NO_DATA_START_OFFSET
 #define DATA_START_OFFSET_WORDS		(0)
+#define MAX_SHARED_LIBS_UPDATE		(0)
 #else
 #define DATA_START_OFFSET_WORDS		(MAX_SHARED_LIBS)
+#define MAX_SHARED_LIBS_UPDATE		(MAX_SHARED_LIBS)
 #endif
 
 struct lib_info {
@@ -880,7 +882,7 @@ static int load_flat_binary(struct linux_binprm *bprm)
 		return res;
 
 	/* Update data segment pointers for all libraries */
-	for (i = 0; i < MAX_SHARED_LIBS; i++) {
+	for (i = 0; i < MAX_SHARED_LIBS_UPDATE; i++) {
 		if (!libinfo.lib_list[i].loaded)
 			continue;
 		for (j = 0; j < MAX_SHARED_LIBS; j++) {

fs/buffer.c

@@ -2179,6 +2179,8 @@ static void __block_commit_write(struct folio *folio, size_t from, size_t to)
 	struct buffer_head *bh, *head;
 
 	bh = head = folio_buffers(folio);
+	if (!bh)
+		return;
 	blocksize = bh->b_size;
 
 	block_start = 0;

fs/cramfs/inode.c

@@ -495,7 +495,7 @@ static void cramfs_kill_sb(struct super_block *sb)
 		sb->s_mtd = NULL;
 	} else if (IS_ENABLED(CONFIG_CRAMFS_BLOCKDEV) && sb->s_bdev) {
 		sync_blockdev(sb->s_bdev);
-		blkdev_put(sb->s_bdev, sb);
+		bdev_release(sb->s_bdev_handle);
 	}
 	kfree(sbi);
 }

fs/erofs/decompressor.c

@@ -248,15 +248,9 @@ static int z_erofs_lz4_decompress_mem(struct z_erofs_lz4_decompress_ctx *ctx,
 	if (ret != rq->outputsize) {
 		erofs_err(rq->sb, "failed to decompress %d in[%u, %u] out[%u]",
 			  ret, rq->inputsize, inputmargin, rq->outputsize);
-
-		print_hex_dump(KERN_DEBUG, "[ in]: ", DUMP_PREFIX_OFFSET,
-			       16, 1, src + inputmargin, rq->inputsize, true);
-		print_hex_dump(KERN_DEBUG, "[out]: ", DUMP_PREFIX_OFFSET,
-			       16, 1, out, rq->outputsize, true);
-
 		if (ret >= 0)
 			memset(out + ret, 0, rq->outputsize - ret);
-		ret = -EIO;
+		ret = -EFSCORRUPTED;
 	} else {
 		ret = 0;
 	}

fs/exec.c

@@ -1609,6 +1609,7 @@ static void bprm_fill_uid(struct linux_binprm *bprm, struct file *file)
 	unsigned int mode;
 	vfsuid_t vfsuid;
 	vfsgid_t vfsgid;
+	int err;
 
 	if (!mnt_may_suid(file->f_path.mnt))
 		return;
@@ -1625,12 +1626,17 @@ static void bprm_fill_uid(struct linux_binprm *bprm, struct file *file)
 	/* Be careful if suid/sgid is set */
 	inode_lock(inode);
 
-	/* reload atomically mode/uid/gid now that lock held */
+	/* Atomically reload and check mode/uid/gid now that lock held. */
 	mode = inode->i_mode;
 	vfsuid = i_uid_into_vfsuid(idmap, inode);
 	vfsgid = i_gid_into_vfsgid(idmap, inode);
+	err = inode_permission(idmap, inode, MAY_EXEC);
 	inode_unlock(inode);
 
+	/* Did the exec bit vanish out from under us? Give up. */
+	if (err)
+		return;
+
 	/* We ignore suid/sgid if there are no mappings for them in the ns */
 	if (!vfsuid_has_mapping(bprm->cred->user_ns, vfsuid) ||
 	    !vfsgid_has_mapping(bprm->cred->user_ns, vfsgid))

fs/ext4/inode.c

@@ -2966,23 +2966,29 @@ static int ext4_da_should_update_i_disksize(struct folio *folio,
 
 static int ext4_da_do_write_end(struct address_space *mapping,
 			loff_t pos, unsigned len, unsigned copied,
-			struct page *page)
+			struct folio *folio)
 {
 	struct inode *inode = mapping->host;
 	loff_t old_size = inode->i_size;
 	bool disksize_changed = false;
 	loff_t new_i_size;
 
+	if (unlikely(!folio_buffers(folio))) {
+		folio_unlock(folio);
+		folio_put(folio);
+		return -EIO;
+	}
 	/*
 	 * block_write_end() will mark the inode as dirty with I_DIRTY_PAGES
 	 * flag, which all that's needed to trigger page writeback.
 	 */
-	copied = block_write_end(NULL, mapping, pos, len, copied, page, NULL);
+	copied = block_write_end(NULL, mapping, pos, len, copied,
+			&folio->page, NULL);
 	new_i_size = pos + copied;
 
 	/*
-	 * It's important to update i_size while still holding page lock,
-	 * because page writeout could otherwise come in and zero beyond
+	 * It's important to update i_size while still holding folio lock,
+	 * because folio writeout could otherwise come in and zero beyond
 	 * i_size.
 	 *
 	 * Since we are holding inode lock, we are sure i_disksize <=
@@ -3000,14 +3006,14 @@ static int ext4_da_do_write_end(struct address_space *mapping,
 
 		i_size_write(inode, new_i_size);
 		end = (new_i_size - 1) & (PAGE_SIZE - 1);
-		if (copied && ext4_da_should_update_i_disksize(page_folio(page), end)) {
+		if (copied && ext4_da_should_update_i_disksize(folio, end)) {
 			ext4_update_i_disksize(inode, new_i_size);
 			disksize_changed = true;
 		}
 	}
 
-	unlock_page(page);
-	put_page(page);
+	folio_unlock(folio);
+	folio_put(folio);
 
 	if (old_size < pos)
 		pagecache_isize_extended(inode, old_size, pos);
@@ -3046,10 +3052,10 @@ static int ext4_da_write_end(struct file *file,
 		return ext4_write_inline_data_end(inode, pos, len, copied,
 						  folio);
 
-	if (unlikely(copied < len) && !PageUptodate(page))
+	if (unlikely(copied < len) && !folio_test_uptodate(folio))
 		copied = 0;
 
-	return ext4_da_do_write_end(mapping, pos, len, copied, &folio->page);
+	return ext4_da_do_write_end(mapping, pos, len, copied, folio);
 }
 
 /*