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:
 "Miscellaneous ext4 bug fixes for 5.1"

* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: prohibit fstrim in norecovery mode
  ext4: cleanup bh release code in ext4_ind_remove_space()
  ext4: brelse all indirect buffer in ext4_ind_remove_space()
  ext4: report real fs size after failed resize
  ext4: add missing brelse() in add_new_gdb_meta_bg()
  ext4: remove useless ext4_pin_inode()
  ext4: avoid panic during forced reboot
  ext4: fix data corruption caused by unaligned direct AIO
  ext4: fix NULL pointer dereference while journal is aborted

1 files changed, 22 insertions, 21 deletions

diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index c2225f0d31b5..2024d3fa5504 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -1222,6 +1222,7 @@ int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
 	ext4_lblk_t offsets[4], offsets2[4];
 	Indirect chain[4], chain2[4];
 	Indirect *partial, *partial2;
+	Indirect *p = NULL, *p2 = NULL;
 	ext4_lblk_t max_block;
 	__le32 nr = 0, nr2 = 0;
 	int n = 0, n2 = 0;
@@ -1263,7 +1264,7 @@ int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
 		}
 
 
-		partial = ext4_find_shared(inode, n, offsets, chain, &nr);
+		partial = p = ext4_find_shared(inode, n, offsets, chain, &nr);
 		if (nr) {
 			if (partial == chain) {
 				/* Shared branch grows from the inode */
@@ -1288,13 +1289,11 @@ int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
 				partial->p + 1,
 				(__le32 *)partial->bh->b_data+addr_per_block,
 				(chain+n-1) - partial);
-			BUFFER_TRACE(partial->bh, "call brelse");
-			brelse(partial->bh);
 			partial--;
 		}
 
 end_range:
-		partial2 = ext4_find_shared(inode, n2, offsets2, chain2, &nr2);
+		partial2 = p2 = ext4_find_shared(inode, n2, offsets2, chain2, &nr2);
 		if (nr2) {
 			if (partial2 == chain2) {
 				/*
@@ -1324,16 +1323,14 @@ end_range:
 					   (__le32 *)partial2->bh->b_data,
 					   partial2->p,
 					   (chain2+n2-1) - partial2);
-			BUFFER_TRACE(partial2->bh, "call brelse");
-			brelse(partial2->bh);
 			partial2--;
 		}
 		goto do_indirects;
 	}
 
 	/* Punch happened within the same level (n == n2) */
-	partial = ext4_find_shared(inode, n, offsets, chain, &nr);
-	partial2 = ext4_find_shared(inode, n2, offsets2, chain2, &nr2);
+	partial = p = ext4_find_shared(inode, n, offsets, chain, &nr);
+	partial2 = p2 = ext4_find_shared(inode, n2, offsets2, chain2, &nr2);
 
 	/* Free top, but only if partial2 isn't its subtree. */
 	if (nr) {
@@ -1390,11 +1387,7 @@ end_range:
 					   partial->p + 1,
 					   partial2->p,
 					   (chain+n-1) - partial);
-			BUFFER_TRACE(partial->bh, "call brelse");
-			brelse(partial->bh);
-			BUFFER_TRACE(partial2->bh, "call brelse");
-			brelse(partial2->bh);
-			return 0;
+			goto cleanup;
 		}
 
 		/*
@@ -1409,8 +1402,6 @@ end_range:
 					   partial->p + 1,
 					   (__le32 *)partial->bh->b_data+addr_per_block,
 					   (chain+n-1) - partial);
-			BUFFER_TRACE(partial->bh, "call brelse");
-			brelse(partial->bh);
 			partial--;
 		}
 		if (partial2 > chain2 && depth2 <= depth) {
@@ -1418,11 +1409,21 @@ end_range:
 					   (__le32 *)partial2->bh->b_data,
 					   partial2->p,
 					   (chain2+n2-1) - partial2);
-			BUFFER_TRACE(partial2->bh, "call brelse");
-			brelse(partial2->bh);
 			partial2--;
 		}
 	}
+
+cleanup:
+	while (p && p > chain) {
+		BUFFER_TRACE(p->bh, "call brelse");
+		brelse(p->bh);
+		p--;
+	}
+	while (p2 && p2 > chain2) {
+		BUFFER_TRACE(p2->bh, "call brelse");
+		brelse(p2->bh);
+		p2--;
+	}
 	return 0;
 
 do_indirects:
@@ -1430,7 +1431,7 @@ do_indirects:
 	switch (offsets[0]) {
 	default:
 		if (++n >= n2)
-			return 0;
+			break;
 		nr = i_data[EXT4_IND_BLOCK];
 		if (nr) {
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 1);
@@ -1439,7 +1440,7 @@ do_indirects:
 		/* fall through */
 	case EXT4_IND_BLOCK:
 		if (++n >= n2)
-			return 0;
+			break;
 		nr = i_data[EXT4_DIND_BLOCK];
 		if (nr) {
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 2);
@@ -1448,7 +1449,7 @@ do_indirects:
 		/* fall through */
 	case EXT4_DIND_BLOCK:
 		if (++n >= n2)
-			return 0;
+			break;
 		nr = i_data[EXT4_TIND_BLOCK];
 		if (nr) {
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 3);
@@ -1458,5 +1459,5 @@ do_indirects:
 	case EXT4_TIND_BLOCK:
 		;
 	}
-	return 0;
+	goto cleanup;
 }