diff options
| author | Nikanth Karthikesan <knikanth@suse.de> | 2010-05-16 14:00:00 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-03-21 12:44:13 -0700 |
| commit | b87c9ea0ff8b0f8e7ff538e1d47a20933b229403 (patch) | |
| tree | db271218157276844515488b6b818d57b41b2bac /fs | |
| parent | 110e9fc4b1c8096f7805c6c3e9e20b55a4aaffc7 (diff) | |
ext4: Prevent creation of files larger than RLIMIT_FSIZE using fallocate
commit 6d19c42b7cf81c39632b6d4dbc514e8449bcd346 upstream.
Currently using posix_fallocate one can bypass an RLIMIT_FSIZE limit
and create a file larger than the limit. Add a check for that.
Signed-off-by: Nikanth Karthikesan <knikanth@suse.de>
Signed-off-by: Amit Arora <aarora@in.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/extents.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 1667fac41f32..505a28177b8d 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -3545,6 +3545,11 @@ long ext4_fallocate(struct inode *inode, int mode, loff_t offset, loff_t len) */ credits = ext4_chunk_trans_blocks(inode, max_blocks); mutex_lock(&inode->i_mutex); + ret = inode_newsize_ok(inode, (len + offset)); + if (ret) { + mutex_unlock(&inode->i_mutex); + return ret; + } retry: while (ret >= 0 && ret < max_blocks) { block = block + ret; |