Module Name: src
Committed By: riastradh
Date: Sun Jul 10 23:11:55 UTC 2022
Modified Files:
src/sys/kern: kern_physio.c
Log Message:
physio(9): Avoid left shift of negative in alignment check.
Reported-by: syzbot+426b1db52f91ad2b9...@syzkaller.appspotmail.com
https://syzkaller.appspot.com/bug?id=f2456661792789db6d1c20e9d7e48db5c151d56d
To generate a diff of this commit:
cvs rdiff -u -r1.101 -r1.102 src/sys/kern/kern_physio.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/kern/kern_physio.c
diff -u src/sys/kern/kern_physio.c:1.101 src/sys/kern/kern_physio.c:1.102
--- src/sys/kern/kern_physio.c:1.101 Thu Jun 30 01:52:29 2022
+++ src/sys/kern/kern_physio.c Sun Jul 10 23:11:55 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: kern_physio.c,v 1.101 2022/06/30 01:52:29 riastradh Exp $ */
+/* $NetBSD: kern_physio.c,v 1.102 2022/07/10 23:11:55 riastradh Exp $ */
/*-
* Copyright (c) 1982, 1986, 1990, 1993
@@ -71,7 +71,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: kern_physio.c,v 1.101 2022/06/30 01:52:29 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: kern_physio.c,v 1.102 2022/07/10 23:11:55 riastradh Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -308,7 +308,7 @@ physio(void (*strategy)(struct buf *), s
* aligned, the block addresses are used to track
* errors of finished requests.
*/
- if (dbtob(bp->b_blkno) != uio->uio_offset) {
+ if (uio->uio_offset & (DEV_BSIZE - 1)) {
error = EINVAL;
goto done;
}
