diff options
| author |   anton <anton@openbsd.org> | 2019-01-21 18:09:21 +0000 |
|---|---|---|
| committer | anton <anton@openbsd.org> | 2019-01-21 18:09:21 +0000 |
| commit | 6bd4f7ca0ef936d4e355b60a534d1efc45dff893 (patch) | |
| tree | 7c0bf8ea9ece81fca5c96fbb924db82043892e20 /sys/kern/vfs_subr.c | |
| parent | Use the actual handshake message type in the certificate request handler. (diff) | |
| download | wireguard-openbsd-6bd4f7ca0ef936d4e355b60a534d1efc45dff893.tar.xz wireguard-openbsd-6bd4f7ca0ef936d4e355b60a534d1efc45dff893.zip | |
Introduce a dedicated entry point data structure for file locks. This new data
structure allows for better tracking of pending lock operations which is
essential in order to prevent a use-after-free once the underlying vnode is
gone.
Inspired by the lockf implementation in FreeBSD.
ok visa@
Reported-by: syzbot+d5540a236382f50f1dac@syzkaller.appspotmail.com
Diffstat (limited to 'sys/kern/vfs_subr.c')
| -rw-r--r-- | sys/kern/vfs_subr.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/kern/vfs_subr.c b/sys/kern/vfs_subr.c index 4e888b98f27..a15481c73f9 100644 --- a/sys/kern/vfs_subr.c +++ b/sys/kern/vfs_subr.c @@ -1,4 +1,4 @@ -/* $OpenBSD: vfs_subr.c,v 1.284 2018/12/23 10:46:51 natano Exp $ */ +/* $OpenBSD: vfs_subr.c,v 1.285 2019/01/21 18:09:21 anton Exp $ */ /* $NetBSD: vfs_subr.c,v 1.53 1996/04/22 01:39:13 christos Exp $ */ /* @@ -52,6 +52,7 @@ #include <sys/conf.h> #include <sys/vnode.h> #include <sys/lock.h> +#include <sys/lockf.h> #include <sys/stat.h> #include <sys/acct.h> #include <sys/namei.h> @@ -1150,6 +1151,7 @@ vgonel(struct vnode *vp, struct proc *p) vx->v_flag &= ~VALIASED; vp->v_flag &= ~VALIASED; } + lf_purgelocks(vp->v_speclockf); free(vp->v_specinfo, M_VNODE, sizeof(struct specinfo)); vp->v_specinfo = NULL; } |