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Diffstat (limited to 'fs/namespace.c')
-rw-r--r--fs/namespace.c29
1 files changed, 12 insertions, 17 deletions
diff --git a/fs/namespace.c b/fs/namespace.c
index 0474b3a93dbf..9b575c9eee0b 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -3705,25 +3705,20 @@ static bool mount_too_revealing(const struct super_block *sb, int *new_mnt_flags
static int do_new_mount_fc(struct fs_context *fc, struct path *mountpoint,
unsigned int mnt_flags)
{
- struct vfsmount *mnt;
struct pinned_mountpoint mp = {};
- struct super_block *sb = fc->root->d_sb;
+ struct super_block *sb;
+ struct vfsmount *mnt = fc_mount(fc);
int error;
+ if (IS_ERR(mnt))
+ return PTR_ERR(mnt);
+
+ sb = fc->root->d_sb;
error = security_sb_kern_mount(sb);
if (!error && mount_too_revealing(sb, &mnt_flags))
error = -EPERM;
-
- if (unlikely(error)) {
- fc_drop_locked(fc);
- return error;
- }
-
- up_write(&sb->s_umount);
-
- mnt = vfs_create_mount(fc);
- if (IS_ERR(mnt))
- return PTR_ERR(mnt);
+ if (unlikely(error))
+ goto out;
mnt_warn_timestamp_expiry(mountpoint, mnt);
@@ -3731,10 +3726,12 @@ static int do_new_mount_fc(struct fs_context *fc, struct path *mountpoint,
if (!error) {
error = do_add_mount(real_mount(mnt), mp.mp,
mountpoint, mnt_flags);
+ if (!error)
+ mnt = NULL; // consumed on success
unlock_mount(&mp);
}
- if (error < 0)
- mntput(mnt);
+out:
+ mntput(mnt);
return error;
}
@@ -3789,8 +3786,6 @@ static int do_new_mount(struct path *path, const char *fstype, int sb_flags,
if (!err && !mount_capable(fc))
err = -EPERM;
if (!err)
- err = vfs_get_tree(fc);
- if (!err)
err = do_new_mount_fc(fc, path, mnt_flags);
put_fs_context(fc);