The commit is pushed to "branch-rh8-4.18.0-240.1.1.vz8.5.x-ovz" and will appear
at https://src.openvz.org/scm/ovz/vzkernel.git
after rh8-4.18.0-240.1.1.vz8.5.43
------>
commit 987be0b9979fd813baf6e5be609c22a76641c3c4
Author: Kirill Tkhai <[email protected]>
Date: Wed Jun 16 13:57:45 2021 +0300
mempolicy: Prohibit VE processes numa binding syscalls
NUMA mustn't not available in CT, so let's prohibit these
calls. For CT tasks this will look like kernel compiled
without NUMA support.
https://jira.sw.ru/browse/PSBM-92583
Signed-off-by: Kirill Tkhai <[email protected]>
(cherry-picked from vz7 commit 01720c50bea3 ("mempolicy: Prohibit VE
processes
numa binding syscalls"))
https://jira.sw.ru/browse/PSBM-127854
Signed-off-by: Valeriy Vdovin <[email protected]>
---
mm/mempolicy.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 3990baab535b..791546fe18e7 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1388,6 +1388,9 @@ static long kernel_set_mempolicy(int mode, const unsigned
long __user *nmask,
nodemask_t nodes;
unsigned short flags;
+ if (!ve_is_super(get_exec_env()))
+ return -ENOSYS;
+
flags = mode & MPOL_MODE_FLAGS;
mode &= ~MPOL_MODE_FLAGS;
if ((unsigned int)mode >= MPOL_MAX)
@@ -1553,6 +1556,9 @@ COMPAT_SYSCALL_DEFINE5(get_mempolicy, int __user *,
policy,
unsigned long nr_bits, alloc_size;
DECLARE_BITMAP(bm, MAX_NUMNODES);
+ if (!ve_is_super(get_exec_env()))
+ return -ENOSYS;
+
nr_bits = min_t(unsigned long, maxnode-1, MAX_NUMNODES);
alloc_size = ALIGN(nr_bits, BITS_PER_LONG) / 8;
@@ -1602,6 +1608,9 @@ COMPAT_SYSCALL_DEFINE6(mbind, compat_ulong_t, start,
compat_ulong_t, len,
unsigned long nr_bits, alloc_size;
nodemask_t bm;
+ if (!ve_is_super(get_exec_env()))
+ return -ENOSYS;
+
nr_bits = min_t(unsigned long, maxnode-1, MAX_NUMNODES);
alloc_size = ALIGN(nr_bits, BITS_PER_LONG) / 8;
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