>Number:         9022
>Category:       port-sparc
>Synopsis:       semctl(2) returns invalid results.
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    port-sparc-maintainer (NetBSD/sparc Portmaster)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Dec 18 06:20:59 1999
>Last-Modified:
>Originator:     URA Hiroshi
>Organization:
URA Hiroshi		E-mail: ura@hiru.aoba.yokohama.jp
>Release:        NetBSD-current 1.4P (1999/12/17)
>Environment:
System: NetBSD uzuki.hiru.aoba.yokohama.jp 1.4P NetBSD 1.4P (UZUKI) #26: Fri Dec 17 18:55:34 JST 1999 root@:/usr/local/src/NetBSD/current/src/sys/arch/sparc/compile/UZUKI sparc


>Description:
  When I tried to run samba on SS10 on running -current, I get a following
error messages.

    ERROR: root did not create the semaphore: semgid=950, rootgid=0

  I wrote an attached test code by way of cheking semctl(2). I got vaild
results on PC running -current, but I got invaild on Sparc running same
-current.

  case PC:
    pc% ./shmemtest.i386elf
    real user id = 12494
    real group id = 20
    effective user id = 12494
    effective group id = 20
    *** union ***
    semaphore user id = 12494
              group id = 20
              creator user id = 12494
              creator group id = 20
              mode = 1644 (932)
    *** varargs ***
    semaphore user id = 12494
              group id = 20
              creator user id = 12494
              creator group id = 20
              mode = 1644 (932)
    *** sleeping ***
    ^Z
    Suspended
    pc% bg
    [1]    ./shmemtest.i386elf &
    pc% ipcs -a
	<snip>
    Semaphores:
    T     ID     KEY        MODE       OWNER    GROUP  CREATOR   CGROUP \
    NSEMS   OTIME    CTIME
    s 458752    1114482 --rw-r--r--    12494       20    12494       20 \
    16no-entry 14:48:12

  case Sparc:
    sparc{1}% ./shmemtest.sparc 
    real user id = 12494
    real group id = 20
    effective user id = 12494
    effective group id = 20
    *** union ***
    semaphore user id = 20
              group id = 12494
              creator user id = 20
              creator group id = 932
              mode = 2200000 (589824)
    *** varargs ***
    semaphore user id = 12494
              group id = 20
              creator user id = 12494
              creator group id = 20
              mode = 1644 (932)
    *** sleeping ***
    ^Z
    Suspended
    sparc% bg
    [1]    ./shmemtest.sparc &
    sparc% ipcs -a
	<snip>
    Semaphores:
    T     ID     KEY        MODE       OWNER    GROUP  CREATOR   CGROUP \
    NSEMS   OTIME    CTIME
    s 589824    1114482 --rw-r--r--    12494       20    12494       20 \
    16no-entry 14:50:01

------ 8X ------ 8X ------ begin cut here ---- 8X------ 8X ------
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>

#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>


int
main(argc, argv)
	int argc;
	char *argv[];
{
	int sem_id;
	volatile union {
		int val;
		struct semid_ds *buf;
		unsigned short *array;
	} sem_un;
	struct semid_ds sem_ds;

	printf("real user id = %d\n", getuid());
	printf("real group id = %d\n", getgid());
	printf("effective user id = %d\n", geteuid());
	printf("effective group id = %d\n", getegid());

	if ((sem_id = semget(0x110172, 0, 0)) < 0) {
		if ((sem_id = semget(0x110172, 16,
				     IPC_CREAT | IPC_EXCL | 0644)) < 0) {
			perror("semget");
			exit(EXIT_FAILURE);
		}
	}

	printf("*** union ***\n");
	sem_un.buf = &sem_ds;
	if (semctl(sem_id, 0, IPC_STAT, sem_un) != 0) {
		perror("semctl");
		exit(EXIT_FAILURE);
	}

	printf("semaphore user id = %d\n"
	       "          group id = %d\n"
	       "          creator user id = %d\n"
	       "          creator group id = %d\n"
	       "          mode = %4o (%d)\n",
	       sem_ds.sem_perm.uid, sem_ds.sem_perm.gid,
	       sem_ds.sem_perm.cuid, sem_ds.sem_perm.cgid,
	       sem_ds.sem_perm.mode, sem_ds.sem_perm.mode);

	printf("*** varargs ***\n");
	if (semctl(sem_id, 0, IPC_STAT, &sem_ds) != 0) {
		perror("semctl");
		exit(EXIT_FAILURE);
	}

	printf("semaphore user id = %d\n"
	       "          group id = %d\n"
	       "          creator user id = %d\n"
	       "          creator group id = %d\n"
	       "          mode = %4o (%d)\n",
	       sem_ds.sem_perm.uid, sem_ds.sem_perm.gid,
	       sem_ds.sem_perm.cuid, sem_ds.sem_perm.cgid,
	       sem_ds.sem_perm.mode, sem_ds.sem_perm.mode);

	printf("*** sleeping ***\n");
	sleep(120);

	if (semctl(sem_id, 0, IPC_RMID, sem_un) != 0) {
		perror("semctl");
		exit(EXIT_FAILURE);
	}

	exit(EXIT_SUCCESS);
}
------ 8X ------ 8X ------ end cut here ----- 8X ------ 8X ------

>How-To-Repeat:
  compile and run an above test code on your sparc running NetBSD-current.

>Fix:
  I do't know.
>Audit-Trail:
>Unformatted: