As mentioned in the comment next to it btrfs_ioctl_trans_start can
do bad damage to filesystems and thus should be limited to privilegued
users.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Index: btrfs-unstable/ioctl.c
===================================================================
--- btrfs-unstable.orig/ioctl.c 2008-06-10 18:17:00.000000000 +0200
+++ btrfs-unstable/ioctl.c 2008-06-10 18:17:57.000000000 +0200
@@ -706,6 +706,9 @@ long btrfs_ioctl_trans_start(struct file
struct btrfs_trans_handle *trans;
int ret = 0;
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
mutex_lock(&root->fs_info->fs_mutex);
if (file->private_data) {
ret = -EINPROGRESS;
--
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