D3603.id9293.diff
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	Index: head/lib/libc/sys/shmctl.2
	===================================================================
	--- head/lib/libc/sys/shmctl.2
	+++ head/lib/libc/sys/shmctl.2
	@@ -25,7 +25,7 @@
	.\"
	.\" $FreeBSD$
	.\"
	-.Dd July 17, 1995
	+.Dd October 10, 2015
	.Dt SHMCTL 2
	.Os
	.Sh NAME
	@@ -72,15 +72,18 @@
	.It Dv IPC_RMID
	Removes the segment from the system.
	The removal will not take
	-effect until all processes having attached the segment have exited;
	-however, once the IPC_RMID operation has taken place, no further
	-processes will be allowed to attach the segment.
	+effect until all processes having attached the segment have exited.
	For the operation
	to succeed, the calling process's effective uid must match
	.Fa shm_perm.uid
	or
	.Fa shm_perm.cuid ,
	or the process must have superuser privileges.
	+If the
	+.Va kern.ipc.shm_allow_removed
	+.Xr sysctl 3
	+variable is set to 0, once the IPC_RMID operation has taken place,
	+no further processes will be allowed to attach the segment.
	.\" .It Dv SHM_LOCK
	.\" Locks the segment in memory. The calling process must have
	.\" superuser privileges. Not implemented in FreeBSD.
	Index: head/sys/kern/sysv_shm.c
	===================================================================
	--- head/sys/kern/sysv_shm.c
	+++ head/sys/kern/sysv_shm.c
	@@ -162,7 +162,7 @@
	};

	static int shm_use_phys;
	-static int shm_allow_removed;
	+static int shm_allow_removed = 1;

	SYSCTL_ULONG(_kern_ipc, OID_AUTO, shmmax, CTLFLAG_RWTUN, &shminfo.shmmax, 0,
	"Maximum shared memory segment size");