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| author | Gui Hecheng <guihc.fnst@cn.fujitsu.com> | 2014-03-31 18:03:25 +0800 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-04-07 09:08:45 -0700 |
| commit | 9a40f1222a372de77344d85d31f8fe0e1c0e60e7 (patch) | |
| tree | 0f4e9fff808aba25e7f9a0b30543b697102b1395 /fs/btrfs | |
| parent | 766b5e5ae78dd04a93a275690a49e23d7dcb1f39 (diff) | |
| download | lwn-9a40f1222a372de77344d85d31f8fe0e1c0e60e7.tar.gz lwn-9a40f1222a372de77344d85d31f8fe0e1c0e60e7.zip | |
btrfs: filter invalid arg for btrfs resize
Originally following cmds will work:
# btrfs fi resize -10A <mnt>
# btrfs fi resize -10Gaha <mnt>
Filter the arg by checking the return pointer of memparse.
Signed-off-by: Gui Hecheng <guihc.fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/ioctl.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 59622366c613..05f8df866e4c 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -1472,6 +1472,7 @@ static noinline int btrfs_ioctl_resize(struct file *file, struct btrfs_trans_handle *trans; struct btrfs_device *device = NULL; char *sizestr; + char *retptr; char *devstr = NULL; int ret = 0; int mod = 0; @@ -1539,8 +1540,8 @@ static noinline int btrfs_ioctl_resize(struct file *file, mod = 1; sizestr++; } - new_size = memparse(sizestr, NULL); - if (new_size == 0) { + new_size = memparse(sizestr, &retptr); + if (*retptr != '\0' || new_size == 0) { ret = -EINVAL; goto out_free; } |