Merge tag 'ASB-2021-02-05_4.19-stable' of https://android.googlesource.com/kernel/common

https://source.android.com/security/bulletin/2021-02-01
CVE-2017-18509
CVE-2020-10767

* tag 'ASB-2021-02-05_4.19-stable': (809 commits)
  ANDROID: GKI: fix up abi issues with 4.19.172
  Linux 4.19.172
  fs: fix lazytime expiration handling in __writeback_single_inode()
  writeback: Drop I_DIRTY_TIME_EXPIRE
  dm integrity: conditionally disable "recalculate" feature
  tools: Factor HOSTCC, HOSTLD, HOSTAR definitions
  tracing: Fix race in trace_open and buffer resize call
  HID: wacom: Correct NULL dereference on AES pen proximity
  futex: Handle faults correctly for PI futexes
  futex: Simplify fixup_pi_state_owner()
  futex: Use pi_state_update_owner() in put_pi_state()
  rtmutex: Remove unused argument from rt_mutex_proxy_unlock()
  futex: Provide and use pi_state_update_owner()
  futex: Replace pointless printk in fixup_owner()
  futex: Ensure the correct return value from futex_lock_pi()
  futex: Prevent exit livelock
  futex: Provide distinct return value when owner is exiting
  futex: Add mutex around futex exit
  futex: Provide state handling for exec() as well
  futex: Sanitize exit state handling
  ...

Change-Id: Ieba6ee3a91a05d504e1f829a84e7d364e7d983f2

Conflicts:
	arch/arm64/boot/dts/rockchip/rk3328.dtsi
	drivers/md/Kconfig
	drivers/usb/gadget/function/f_uac2.c

security/integrity/ima/ima_crypto.c

@@ -415,7 +415,7 @@ int ima_calc_file_hash(struct file *file, struct ima_digest_data *hash)
 	loff_t i_size;
 	int rc;
 	struct file *f = file;
-	bool new_file_instance = false, modified_mode = false;
+	bool new_file_instance = false;
 
 	/*
 	 * For consistency, fail file's opened with the O_DIRECT flag on
@@ -433,18 +433,10 @@ int ima_calc_file_hash(struct file *file, struct ima_digest_data *hash)
 				O_TRUNC | O_CREAT | O_NOCTTY | O_EXCL);
 		flags |= O_RDONLY;
 		f = dentry_open(&file->f_path, flags, file->f_cred);
-		if (IS_ERR(f)) {
-			/*
-			 * Cannot open the file again, lets modify f_mode
-			 * of original and continue
-			 */
-			pr_info_ratelimited("Unable to reopen file for reading.\n");
-			f = file;
-			f->f_mode |= FMODE_READ;
-			modified_mode = true;
-		} else {
-			new_file_instance = true;
-		}
+		if (IS_ERR(f))
+			return PTR_ERR(f);
+
+		new_file_instance = true;
 	}
 
 	i_size = i_size_read(file_inode(f));
@@ -459,8 +451,6 @@ int ima_calc_file_hash(struct file *file, struct ima_digest_data *hash)
 out:
 	if (new_file_instance)
 		fput(f);
-	else if (modified_mode)
-		f->f_mode &= ~FMODE_READ;
 	return rc;
 }
 
@@ -651,7 +641,7 @@ int ima_calc_buffer_hash(const void *buf, loff_t len,
 	return calc_buffer_shash(buf, len, hash);
 }
 
-static void __init ima_pcrread(int idx, u8 *pcr)
+static void ima_pcrread(int idx, u8 *pcr)
 {
 	if (!ima_tpm_chip)
 		return;

security/lsm_audit.c

@@ -277,7 +277,9 @@ static void dump_common_audit_data(struct audit_buffer *ab,
 		struct inode *inode;
 
 		audit_log_format(ab, " name=");
+		spin_lock(&a->u.dentry->d_lock);
 		audit_log_untrustedstring(ab, a->u.dentry->d_name.name);
+		spin_unlock(&a->u.dentry->d_lock);
 
 		inode = d_backing_inode(a->u.dentry);
 		if (inode) {
@@ -295,8 +297,9 @@ static void dump_common_audit_data(struct audit_buffer *ab,
 		dentry = d_find_alias(inode);
 		if (dentry) {
 			audit_log_format(ab, " name=");
-			audit_log_untrustedstring(ab,
-					 dentry->d_name.name);
+			spin_lock(&dentry->d_lock);
+			audit_log_untrustedstring(ab, dentry->d_name.name);
+			spin_unlock(&dentry->d_lock);
 			dput(dentry);
 		}
 		audit_log_format(ab, " dev=");

security/selinux/hooks.c

@@ -1619,7 +1619,7 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent
 			 * inode_doinit with a dentry, before these inodes could
 			 * be used again by userspace.
 			 */
-			goto out;
+			goto out_invalid;
 		}
 
 		len = INITCONTEXTLEN;
@@ -1735,7 +1735,7 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent
 			 * could be used again by userspace.
 			 */
 			if (!dentry)
-				goto out;
+				goto out_invalid;
 			rc = selinux_genfs_get_sid(dentry, sclass,
 						   sbsec->flags, &sid);
 			dput(dentry);
@@ -1748,11 +1748,10 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent
 out:
 	spin_lock(&isec->lock);
 	if (isec->initialized == LABEL_PENDING) {
-		if (!sid || rc) {
+		if (rc) {
 			isec->initialized = LABEL_INVALID;
 			goto out_unlock;
 		}
-
 		isec->initialized = LABEL_INITIALIZED;
 		isec->sid = sid;
 	}
@@ -1760,6 +1759,15 @@ out:
 out_unlock:
 	spin_unlock(&isec->lock);
 	return rc;
+
+out_invalid:
+	spin_lock(&isec->lock);
+	if (isec->initialized == LABEL_PENDING) {
+		isec->initialized = LABEL_INVALID;
+		isec->sid = sid;
+	}
+	spin_unlock(&isec->lock);
+	return 0;
 }
 
 /* Convert a Linux signal to an access vector. */