[src/trunk]: src/sys/kern sys_memfd: Fix logic errors for offset in the previ...

[rin <rin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/14ca59cc3c9a
branches:  trunk
changeset: 378332:14ca59cc3c9a
user:      rin <rin%NetBSD.org@localhost>
date:      Sat Jul 29 23:51:29 2023 +0000

description:
sys_memfd: Fix logic errors for offset in the previous.

diffstat:

 sys/kern/sys_memfd.c |  10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diffs (34 lines):

diff -r 06755fcd1afe -r 14ca59cc3c9a sys/kern/sys_memfd.c
--- a/sys/kern/sys_memfd.c      Sat Jul 29 23:50:03 2023 +0000
+++ b/sys/kern/sys_memfd.c      Sat Jul 29 23:51:29 2023 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: sys_memfd.c,v 1.6 2023/07/29 17:54:54 christos Exp $   */
+/*     $NetBSD: sys_memfd.c,v 1.7 2023/07/29 23:51:29 rin Exp $        */
 
 /*-
  * Copyright (c) 2023 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: sys_memfd.c,v 1.6 2023/07/29 17:54:54 christos Exp $");
+__KERNEL_RCSID(0, "$NetBSD: sys_memfd.c,v 1.7 2023/07/29 23:51:29 rin Exp $");
 
 #include <sys/param.h>
 #include <sys/types.h>
@@ -160,12 +160,12 @@ memfd_read(file_t *fp, off_t *offp, stru
                goto leave;
        }
 
-       if (flags & FOF_UPDATE_OFFSET)
-               *offp = uio->uio_offset;
+       uio->uio_offset = *offp;
        todo = MIN(uio->uio_resid, mfd->mfd_size - *offp);
        error = ubc_uiomove(mfd->mfd_uobj, uio, todo, UVM_ADV_SEQUENTIAL,
            UBC_READ|UBC_PARTIALOK);
-       *offp = uio->uio_offset;
+       if (flags & FOF_UPDATE_OFFSET)
+               *offp = uio->uio_offset;
 
 leave:
        getnanotime(&mfd->mfd_atime);