Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "Some bug fixes, and an update to the URL's for the final version of
  Unicode 12.1.0"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: avoid panic during forced reboot due to aborted journal
  ext4: fix block validity checks for journal inodes using indirect blocks
  unicode: update to Unicode 12.1.0 final
  unicode: add missing check for an error return from utf8lookup()
  ext4: fix miscellaneous sparse warnings
  ext4: unsigned int compared against zero
  ext4: fix use-after-free in dx_release()
  ext4: fix data corruption caused by overlapping unaligned and aligned IO
  jbd2: fix potential double free
  ext4: zero out the unused memory region in the extent tree block

2 files changed, 9 insertions, 21 deletions

diff --git a/fs/unicode/README.utf8data b/fs/unicode/README.utf8data
index 9307cf0727de..c73786807d3b 100644
--- a/fs/unicode/README.utf8data
+++ b/fs/unicode/README.utf8data
@@ -5,29 +5,15 @@ The full set of files can be found here:
 
   http://www.unicode.org/Public/12.1.0/ucd/
 
-Note!
-
-The URL's listed below are not stable.  That's because Unicode 12.1.0
-has not been officially released yet; it is scheduled to be released
-on May 8, 2019.  We taking Unicode 12.1.0 a few weeks early because it
-contains a new Japanese character which is required in order to
-specify Japenese dates after May 1, 2019, when Crown Prince Naruhito
-ascends to the Chrysanthemum Throne.  (Isn't internationalization fun?
-The abdication of Emperor Akihito of Japan is requiring dozens of
-software packages to be updated with only a month's notice.  :-)
-
-We will update the URL's (and any needed changes to the checksums)
-after the final Unicode 12.1.0 is released.
-
 Individual source links:
 
-  https://www.unicode.org/Public/12.1.0/ucd/CaseFolding-12.1.0d2.txt
-  https://www.unicode.org/Public/12.1.0/ucd/DerivedAge-12.1.0d3.txt
-  https://www.unicode.org/Public/12.1.0/ucd/extracted/DerivedCombiningClass-12.1.0d2.txt
-  https://www.unicode.org/Public/12.1.0/ucd/DerivedCoreProperties-12.1.0d2.txt
-  https://www.unicode.org/Public/12.1.0/ucd/NormalizationCorrections-12.1.0d1.txt
-  https://www.unicode.org/Public/12.1.0/ucd/NormalizationTest-12.1.0d3.txt
-  https://www.unicode.org/Public/12.1.0/ucd/UnicodeData-12.1.0d2.txt
+  https://www.unicode.org/Public/12.1.0/ucd/CaseFolding.txt
+  https://www.unicode.org/Public/12.1.0/ucd/DerivedAge.txt
+  https://www.unicode.org/Public/12.1.0/ucd/extracted/DerivedCombiningClass.txt
+  https://www.unicode.org/Public/12.1.0/ucd/DerivedCoreProperties.txt
+  https://www.unicode.org/Public/12.1.0/ucd/NormalizationCorrections.txt
+  https://www.unicode.org/Public/12.1.0/ucd/NormalizationTest.txt
+  https://www.unicode.org/Public/12.1.0/ucd/UnicodeData.txt
 
 md5sums (verify by running "md5sum -c README.utf8data"):
 
diff --git a/fs/unicode/utf8-norm.c b/fs/unicode/utf8-norm.c
index 20d440c3f2db..801ed6d2ea37 100644
--- a/fs/unicode/utf8-norm.c
+++ b/fs/unicode/utf8-norm.c
@@ -714,6 +714,8 @@ int utf8byte(struct utf8cursor *u8c)
 			}
 
 			leaf = utf8lookup(u8c->data, u8c->hangul, u8c->s);
+			if (!leaf)
+				return -1;
 			ccc = LEAF_CCC(leaf);
 		}