Index: src/sys/compat/linux/linux_file.c
===================================================================
RCS file: /home/scvs/src/sys/compat/linux/linux_file.c,v
retrieving revision 1.119.2.1
diff -u -p -u -p -r1.119.2.1 linux_file.c
--- src/sys/compat/linux/linux_file.c	3 Aug 2009 08:13:06 -0000	1.119.2.1
+++ src/sys/compat/linux/linux_file.c	25 Feb 2010 20:08:47 -0000
@@ -226,6 +226,7 @@ linux_lseek(struct thread *td, struct li
 	int whence;
     } */ tmp_args;
     int error;
+    l_off_t l_off;
 
 #ifdef DEBUG
 	if (ldebug(lseek))
@@ -236,6 +237,10 @@ linux_lseek(struct thread *td, struct li
     tmp_args.offset = (off_t)args->off;
     tmp_args.whence = args->whence;
     error = lseek(td, &tmp_args);
+    /* Check for overflow like Linux does. */
+    l_off = *(off_t *)td->td_retval;
+    if (((off_t)l_off) != *(off_t *)td->td_retval)
+	error = EOVERFLOW;
     return error;
 }