From 28b325aa608a79a5f5de84ca37d9695d5ddd4ee2 Mon Sep 17 00:00:00 2001
From: Don Lewis <truckman@FreeBSD.org>
Date: Fri, 13 Sep 2002 09:31:56 +0000
Subject: [PATCH] Drop the proc lock while calling fdcheckstd() which may block
 to allocate memory.

Reviewed by:	jhb
---
 sys/kern/kern_exec.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/sys/kern/kern_exec.c b/sys/kern/kern_exec.c
index 8423f626a303..2ac44868a6b6 100644
--- a/sys/kern/kern_exec.c
+++ b/sys/kern/kern_exec.c
@@ -437,8 +437,15 @@ interpret:
 #endif
 		/* Close any file descriptors 0..2 that reference procfs */
 		setugidsafety(td);
-		/* Make sure file descriptors 0..2 are in use.  */
+		/*
+		 * Make sure file descriptors 0..2 are in use.
+		 *
+		 * fdcheckstd() may call falloc() which may block to
+		 * allocate memory, so temporarily drop the process lock.
+		 */
+		PROC_UNLOCK(p);
 		error = fdcheckstd(td);
+		PROC_LOCK(p);
 		if (error != 0)
 			goto done1;
 		/*