diff options
| author | Jan Kara <jack@suse.cz> | 2014-10-01 21:49:46 -0400 |
|---|---|---|
| committer | Jiri Slaby <jslaby@suse.cz> | 2014-11-13 19:02:34 +0100 |
| commit | 97f94c2e2fe51803a074d4e50de0049a243391eb (patch) | |
| tree | 102760e4d9de68007a97bd3b3c346305c2620fb2 /fs | |
| parent | 0dce193f3456fe009fc3c588f4ac39f33446df61 (diff) | |
ext4: fix mmap data corruption when blocksize < pagesize
commit d6320cbfc92910a3e5f10c42d98c231c98db4f60 upstream.
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>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Diffstat (limited to 'fs')
| -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 d65a6260ad61..474b9eafee43 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4655,8 +4655,12 @@ 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 |