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| author | Chengguang Xu <cgxu519@gmx.com> | 2018-07-19 22:15:25 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2018-08-02 21:33:28 +0200 |
| commit | 0671e9968dfb3f99a366df816c361b8e871dba1b (patch) | |
| tree | 5abae989553cfe457b8da5d85af9af52ad969943 /fs/ceph | |
| parent | 719784ba706cdbb47ef87483950f0a4594d36e87 (diff) | |
| download | linux-0671e9968dfb3f99a366df816c361b8e871dba1b.tar.bz2 | |
ceph: add additional range check in ceph_fallocate()
If the range is larger than both real file size and limit of
max file size, then return -EFBIG.
Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/file.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 2f3a30ca94bf..2c54d2674db6 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -1728,8 +1728,7 @@ static long ceph_fallocate(struct file *file, int mode, struct ceph_file_info *fi = file->private_data; struct inode *inode = file_inode(file); struct ceph_inode_info *ci = ceph_inode(inode); - struct ceph_osd_client *osdc = - &ceph_inode_to_client(inode)->client->osdc; + struct ceph_fs_client *fsc = ceph_inode_to_client(inode); struct ceph_cap_flush *prealloc_cf; int want, got = 0; int dirty; @@ -1737,6 +1736,9 @@ static long ceph_fallocate(struct file *file, int mode, loff_t endoff = 0; loff_t size; + if ((offset + length) > max(i_size_read(inode), fsc->max_file_size)) + return -EFBIG; + if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE)) return -EOPNOTSUPP; @@ -1760,7 +1762,7 @@ static long ceph_fallocate(struct file *file, int mode, goto unlock; } - if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL) && + if (ceph_osdmap_flag(&fsc->client->osdc, CEPH_OSDMAP_FULL) && !(mode & FALLOC_FL_PUNCH_HOLE)) { ret = -ENOSPC; goto unlock; |