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SubjectRe: [PATCH 7/8] vhost: use kernel_copy_process to check RLIMITs and inherit cgroups
Hi Mike,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on mst-vhost/linux-next]
[also build test ERROR on linus/master v5.15-rc2 next-20210920]
[cannot apply to tip/sched/core tip/x86/core]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Mike-Christie/Use-copy_process-create_io_thread-in-vhost-layer/20210917-052427
base: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next
config: i386-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
# https://github.com/0day-ci/linux/commit/57f4cf5028dd552f4895a6a83a8607412ceb8b6c
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Mike-Christie/Use-copy_process-create_io_thread-in-vhost-layer/20210917-052427
git checkout 57f4cf5028dd552f4895a6a83a8607412ceb8b6c
# save the attached .config to linux build tree
make W=1 ARCH=i386

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

In file included from include/linux/sched.h:10,
from include/linux/eventfd.h:17,
from drivers/vhost/vhost.c:13:
drivers/vhost/vhost.c: In function 'vhost_worker_create':
>> include/uapi/linux/sched.h:12:18: error: conversion from 'long long unsigned int' to 'long unsigned int' changes value from '4294967808' to '512' [-Werror=overflow]
12 | #define CLONE_FS 0x00000200 /* set if fs info shared between processes */
| ^
drivers/vhost/vhost.c:626:8: note: in expansion of macro 'CLONE_FS'
626 | CLONE_FS|CLONE_CLEAR_SIGHAND, 0, 1);
| ^~~~~~~~
At top level:
drivers/vhost/vhost.c:532:12: error: 'vhost_attach_cgroups' defined but not used [-Werror=unused-function]
532 | static int vhost_attach_cgroups(struct vhost_dev *dev)
| ^~~~~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors


vim +12 include/uapi/linux/sched.h

7f192e3cd316ba Christian Brauner 2019-05-25 6
607ca46e97a1b6 David Howells 2012-10-13 7 /*
607ca46e97a1b6 David Howells 2012-10-13 8 * cloning flags:
607ca46e97a1b6 David Howells 2012-10-13 9 */
607ca46e97a1b6 David Howells 2012-10-13 10 #define CSIGNAL 0x000000ff /* signal mask to be sent at exit */
607ca46e97a1b6 David Howells 2012-10-13 11 #define CLONE_VM 0x00000100 /* set if VM shared between processes */
607ca46e97a1b6 David Howells 2012-10-13 @12 #define CLONE_FS 0x00000200 /* set if fs info shared between processes */
607ca46e97a1b6 David Howells 2012-10-13 13 #define CLONE_FILES 0x00000400 /* set if open files shared between processes */
607ca46e97a1b6 David Howells 2012-10-13 14 #define CLONE_SIGHAND 0x00000800 /* set if signal handlers and blocked signals shared */
b3e5838252665e Christian Brauner 2019-03-27 15 #define CLONE_PIDFD 0x00001000 /* set if a pidfd should be placed in parent */
607ca46e97a1b6 David Howells 2012-10-13 16 #define CLONE_PTRACE 0x00002000 /* set if we want to let tracing continue on the child too */
607ca46e97a1b6 David Howells 2012-10-13 17 #define CLONE_VFORK 0x00004000 /* set if the parent wants the child to wake it up on mm_release */
607ca46e97a1b6 David Howells 2012-10-13 18 #define CLONE_PARENT 0x00008000 /* set if we want to have the same parent as the cloner */
607ca46e97a1b6 David Howells 2012-10-13 19 #define CLONE_THREAD 0x00010000 /* Same thread group? */
fcd964dda5ece2 Chen Hanxiao 2014-10-07 20 #define CLONE_NEWNS 0x00020000 /* New mount namespace group */
607ca46e97a1b6 David Howells 2012-10-13 21 #define CLONE_SYSVSEM 0x00040000 /* share system V SEM_UNDO semantics */
607ca46e97a1b6 David Howells 2012-10-13 22 #define CLONE_SETTLS 0x00080000 /* create a new TLS for the child */
607ca46e97a1b6 David Howells 2012-10-13 23 #define CLONE_PARENT_SETTID 0x00100000 /* set the TID in the parent */
607ca46e97a1b6 David Howells 2012-10-13 24 #define CLONE_CHILD_CLEARTID 0x00200000 /* clear the TID in the child */
607ca46e97a1b6 David Howells 2012-10-13 25 #define CLONE_DETACHED 0x00400000 /* Unused, ignored */
607ca46e97a1b6 David Howells 2012-10-13 26 #define CLONE_UNTRACED 0x00800000 /* set if the tracing process can't force CLONE_PTRACE on this clone */
607ca46e97a1b6 David Howells 2012-10-13 27 #define CLONE_CHILD_SETTID 0x01000000 /* set the TID in the child */
5e2bec7c2248ae Aditya Kali 2016-01-29 28 #define CLONE_NEWCGROUP 0x02000000 /* New cgroup namespace */
f622b429dadf83 Chen Hanxiao 2014-11-04 29 #define CLONE_NEWUTS 0x04000000 /* New utsname namespace */
f622b429dadf83 Chen Hanxiao 2014-11-04 30 #define CLONE_NEWIPC 0x08000000 /* New ipc namespace */
607ca46e97a1b6 David Howells 2012-10-13 31 #define CLONE_NEWUSER 0x10000000 /* New user namespace */
607ca46e97a1b6 David Howells 2012-10-13 32 #define CLONE_NEWPID 0x20000000 /* New pid namespace */
607ca46e97a1b6 David Howells 2012-10-13 33 #define CLONE_NEWNET 0x40000000 /* New network namespace */
607ca46e97a1b6 David Howells 2012-10-13 34 #define CLONE_IO 0x80000000 /* Clone io context */
607ca46e97a1b6 David Howells 2012-10-13 35

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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