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>
---
fs/btrfs/ioctl.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index e174770..2ed21fa 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -1459,6 +1459,7 @@ 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;
@@ -1526,8 +1527,8 @@ 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;
}
--
1.8.1.4
--
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