diff options
| author | Goldwyn Rodrigues <rgoldwyn@suse.com> | 2021-07-27 16:17:29 -0500 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2021-08-23 13:19:10 +0200 |
| commit | 0afb603afc3e3dd15c99dd34d5e18b46f9f5c0e4 (patch) | |
| tree | 18032d5cec5fb8fafb6430908fb18f58112c372c /fs/btrfs | |
| parent | 98caf9531e1de8104b45fabbab4b6c2f290068fa (diff) | |
| download | linux-0afb603afc3e3dd15c99dd34d5e18b46f9f5c0e4.tar.bz2 | |
btrfs: allocate btrfs_ioctl_quota_rescan_args on stack
Instead of using kmalloc() to allocate btrfs_ioctl_quota_rescan_args,
allocate btrfs_ioctl_quota_rescan_args on stack, the size is reasonably
small and ioctls are called in process context.
sizeof(btrfs_ioctl_quota_rescan_args) = 64
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/ioctl.c | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index ba1dab6a5012..3d0ae797cd8d 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -4403,25 +4403,20 @@ drop_write: static long btrfs_ioctl_quota_rescan_status(struct btrfs_fs_info *fs_info, void __user *arg) { - struct btrfs_ioctl_quota_rescan_args *qsa; + struct btrfs_ioctl_quota_rescan_args qsa = {0}; int ret = 0; if (!capable(CAP_SYS_ADMIN)) return -EPERM; - qsa = kzalloc(sizeof(*qsa), GFP_KERNEL); - if (!qsa) - return -ENOMEM; - if (fs_info->qgroup_flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN) { - qsa->flags = 1; - qsa->progress = fs_info->qgroup_rescan_progress.objectid; + qsa.flags = 1; + qsa.progress = fs_info->qgroup_rescan_progress.objectid; } - if (copy_to_user(arg, qsa, sizeof(*qsa))) + if (copy_to_user(arg, &qsa, sizeof(qsa))) ret = -EFAULT; - kfree(qsa); return ret; } |