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mcexec/mcctrl: unmount cgroups (privately) which expose invalid NUMA info

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This commit is contained in:
Balazs Gerofi
2016-11-04 17:02:48 +09:00
parent 3e093f6a40
commit e46f027894
7 changed files with 154 additions and 59 deletions
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50
executer/kernel/mcctrl/control.c
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@ -66,7 +66,18 @@ int (*mcctrl_sys_mount)(char *dev_name,char *dir_name, char *type, unsigned long
(int_star_fn_char_char_char_ulong_void_t)
MCCTRL_KSYM_sys_mount;
#else // exported
int (*mcctrl_sys_mount)(char *dev_name,char *dir_name, char *type, unsigned long flags, void *data) = NULL;
int (*mcctrl_sys_mount)(char *dev_name,char *dir_name, char *type, unsigned long flags, void *data) = sys_mount;
#endif
#endif
#ifdef MCCTRL_KSYM_sys_umount
#if MCCTRL_KSYM_sys_umount
typedef int (*int_fn_char_star_int_t)(char *, int);
int (*mcctrl_sys_umount)(char *dir_name, int flags) =
(int_fn_char_star_int_t)
MCCTRL_KSYM_sys_umount;
#else // exported
int (*mcctrl_sys_umount)(char *dir_name, int flags) = sys_umount;
#endif
#endif
@ -1154,7 +1165,7 @@ long mcexec_sys_mount(struct sys_mount_desc *__user arg)
cap_raise(promoted->cap_effective, CAP_SYS_ADMIN);
original = override_creds(promoted);
#if MCCTRL_KSYM_sys_mount
#ifdef MCCTRL_KSYM_sys_mount
ret = mcctrl_sys_mount(desc.dev_name, desc.dir_name, desc.type,
desc.flags, desc.data);
#else
@ -1167,6 +1178,38 @@ long mcexec_sys_mount(struct sys_mount_desc *__user arg)
return ret;
}
long mcexec_sys_umount(struct sys_mount_desc *__user arg)
{
struct sys_umount_desc desc;
struct cred *promoted;
const struct cred *original;
int ret;
if (copy_from_user(&desc, arg, sizeof(desc))) {
return -EFAULT;
}
promoted = prepare_creds();
if (!promoted) {
return -ENOMEM;
}
cap_raise(promoted->cap_effective, CAP_SYS_ADMIN);
original = override_creds(promoted);
#ifdef MCCTRL_KSYM_sys_umount
ret = mcctrl_sys_umount(desc.dir_name, MNT_FORCE);
kprintf("%s: mcctrl_sys_umount: %d\n", __FUNCTION__, ret);
#else
ret = -EFAULT;
kprintf("%s: mcctrl_sys_umount not defined?\n", __FUNCTION__);
#endif
revert_creds(original);
put_cred(promoted);
return ret;
}
long mcexec_sys_unshare(struct sys_unshare_desc *__user arg)
{
struct sys_unshare_desc desc;
@ -1254,6 +1297,9 @@ long __mcctrl_control(ihk_os_t os, unsigned int req, unsigned long arg,
case MCEXEC_UP_SYS_MOUNT:
return mcexec_sys_mount((struct sys_mount_desc *)arg);
case MCEXEC_UP_SYS_UMOUNT:
return mcexec_sys_umount((struct sys_mount_desc *)arg);
case MCEXEC_UP_SYS_UNSHARE:
return mcexec_sys_unshare((struct sys_unshare_desc *)arg);