Ilya Dryomov
2013-Oct-10 17:39 UTC
[PATCH] Btrfs: don''t leak ioctl args in btrfs_ioctl_dev_replace
struct btrfs_ioctl_dev_replace_args memory is leaked if replace is
requested on a read-only filesystem. Fix it.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
---
fs/btrfs/ioctl.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 9d46f60..17bb98e 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -3679,9 +3679,10 @@ static long btrfs_ioctl_dev_replace(struct btrfs_root
*root, void __user *arg)
switch (p->cmd) {
case BTRFS_IOCTL_DEV_REPLACE_CMD_START:
- if (root->fs_info->sb->s_flags & MS_RDONLY)
- return -EROFS;
-
+ if (root->fs_info->sb->s_flags & MS_RDONLY) {
+ ret = -EROFS;
+ goto out;
+ }
if (atomic_xchg(
&root->fs_info->mutually_exclusive_operation_running,
1)) {
@@ -3707,7 +3708,7 @@ static long btrfs_ioctl_dev_replace(struct btrfs_root
*root, void __user *arg)
if (copy_to_user(arg, p, sizeof(*p)))
ret = -EFAULT;
-
+out:
kfree(p);
return ret;
}
--
1.7.10.4
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