diff options
| author | Nikanth Karthikesan <knikanth@suse.de> | 2010-05-16 14:00:00 -0400 |
|---|---|---|
| committer | Paul Gortmaker <paul.gortmaker@windriver.com> | 2011-01-06 18:07:36 -0500 |
| commit | 508982ae874515f1adff7c650a6067a83f790b5f (patch) | |
| tree | 3a4f131f525682f2c5a99bb333dda42f7c630c5b | |
| parent | ff75dbcebeda9646e7f05e0b99ca715fe9f54870 (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: Paul Gortmaker <paul.gortmaker@windriver.com>
| -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 ee611daf074..8a8f9f0be91 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -3708,6 +3708,11 @@ 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; |