From: Curt Wohlgemuth <curtw@xxxxxxxxxx>
commit fd2dd9fbaf9e498ec63eef298921e36556f7214c upstream (as of v2.6.34-rc6)
Calls to ext4_get_inode_loc() returns with a reference to a buffer
head in iloc->bh. The callers of this function in ext4_write_inode()
when in no journal mode and in ext4_xattr_fiemap() don't release the
buffer head after using it.
Addresses-Google-Bug: #2548165
Signed-off-by: Curt Wohlgemuth <curtw@xxxxxxxxxx>
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
---
fs/ext4/extents.c | 1 +
fs/ext4/inode.c | 1 +
2 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index f47a7c1..4378941 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -3778,6 +3778,7 @@ static int ext4_xattr_fiemap(struct inode *inode,
physical += offset;
length = EXT4_SB(inode->i_sb)->s_inode_size - offset;
flags |= FIEMAP_EXTENT_DATA_INLINE;
+ brelse(iloc.bh);
} else { /* external block */
physical = EXT4_I(inode)->i_file_acl << blockbits;
length = inode->i_sb->s_blocksize;
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index f81025f..45e6961 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5273,6 +5273,7 @@ int ext4_write_inode(struct inode *inode, int wait)
(unsigned long long)iloc.bh->b_blocknr);
err = -EIO;
}
+ brelse(iloc.bh);
}
return err;
}
--
1.6.6.1.1.g974db.dirty
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