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| author | Jan Kara <jack@suse.cz> | 2014-10-01 21:49:46 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2014-10-01 21:49:46 -0400 |
| commit | d6320cbfc92910a3e5f10c42d98c231c98db4f60 (patch) | |
| tree | cbb8eeb01f8974e14b0342e5fdcbabf099a3b304 | |
| parent | 90a8020278c1598fafd071736a0846b38510309c (diff) | |
| download | talos-op-linux-d6320cbfc92910a3e5f10c42d98c231c98db4f60.tar.gz talos-op-linux-d6320cbfc92910a3e5f10c42d98c231c98db4f60.zip | |
ext4: fix mmap data corruption when blocksize < pagesize
Use truncate_isize_extended() when hole is being created in a file so that
->page_mkwrite() will get called for the partial tail page if it is
mmaped (see the first patch in the series for details).
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@vger.kernel.org
| -rw-r--r-- | fs/ext4/inode.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index d5dd7d46844e..091845298f48 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4514,8 +4514,12 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) ext4_orphan_del(NULL, inode); goto err_out; } - } else + } else { + loff_t oldsize = inode->i_size; + i_size_write(inode, attr->ia_size); + pagecache_isize_extended(inode, oldsize, inode->i_size); + } /* * Blocks are going to be removed from the inode. Wait |
