diff options
| author | Jan Kara <jack@suse.cz> | 2013-08-16 21:19:41 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-08-16 21:19:41 -0400 |
| commit | a361293f5fedea0016a10599f409631a15d47ee7 (patch) | |
| tree | 63f69548f7479039312c6f61dcadeec9068c80d0 /fs/ext4/file.c | |
| parent | 91aa11fae1cf8c2fd67be0609692ea9741cdcc43 (diff) | |
| download | linux-a361293f5fedea0016a10599f409631a15d47ee7.tar.gz | |
jbd2: Fix oops in jbd2_journal_file_inode()
Commit 0713ed0cde76438d05849f1537d3aab46e099475 added
jbd2_journal_file_inode() call into ext4_block_zero_page_range().
However that function gets called from truncate path and thus inode
needn't have jinode attached - that happens in ext4_file_open() but
the file needn't be ever open since mount. Calling
jbd2_journal_file_inode() without jinode attached results in the oops.
We fix the problem by attaching jinode to inode also in ext4_truncate()
and ext4_punch_hole() when we are going to zero out partial blocks.
Reported-by: majianpeng <majianpeng@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/file.c')
| -rw-r--r-- | fs/ext4/file.c | 21 |
1 files changed, 4 insertions, 17 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 6f4cc567c382b..319c9d26279a9 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -219,7 +219,6 @@ static int ext4_file_open(struct inode * inode, struct file * filp) { struct super_block *sb = inode->i_sb; struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); - struct ext4_inode_info *ei = EXT4_I(inode); struct vfsmount *mnt = filp->f_path.mnt; struct path path; char buf[64], *cp; @@ -259,22 +258,10 @@ static int ext4_file_open(struct inode * inode, struct file * filp) * Set up the jbd2_inode if we are opening the inode for * writing and the journal is present */ - if (sbi->s_journal && !ei->jinode && (filp->f_mode & FMODE_WRITE)) { - struct jbd2_inode *jinode = jbd2_alloc_inode(GFP_KERNEL); - - spin_lock(&inode->i_lock); - if (!ei->jinode) { - if (!jinode) { - spin_unlock(&inode->i_lock); - return -ENOMEM; - } - ei->jinode = jinode; - jbd2_journal_init_jbd_inode(ei->jinode, inode); - jinode = NULL; - } - spin_unlock(&inode->i_lock); - if (unlikely(jinode != NULL)) - jbd2_free_inode(jinode); + if (filp->f_mode & FMODE_WRITE) { + int ret = ext4_inode_attach_jinode(inode); + if (ret < 0) + return ret; } return dquot_file_open(inode, filp); } |