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sendto(2), recvfrom(2): Scrub internal struct msghdr on stack. 

Otherwise this is kernel stack disclosure via ktrace.

Reported-by: syzbot+1d40303b310063778194@syzkaller.appspotmail.com
This commit is contained in:
riastradh 2022-07-01 22:30:51 +00:00
parent 15ee8ca16e
commit 311083ee52
1 changed files with 4 additions and 4 deletions
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8
sys/kern/uipc_syscalls.c
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@ -1,4 +1,4 @@
/* $NetBSD: uipc_syscalls.c,v 1.205 2022/06/29 22:27:12 riastradh Exp $ */
/* $NetBSD: uipc_syscalls.c,v 1.206 2022/07/01 22:30:51 riastradh Exp $ */
/*-
* Copyright (c) 2008, 2009 The NetBSD Foundation, Inc.
@ -61,7 +61,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uipc_syscalls.c,v 1.205 2022/06/29 22:27:12 riastradh Exp $");
__KERNEL_RCSID(0, "$NetBSD: uipc_syscalls.c,v 1.206 2022/07/01 22:30:51 riastradh Exp $");
#ifdef _KERNEL_OPT
#include "opt_pipe.h"
@ -498,7 +498,7 @@ sys_sendto(struct lwp *l, const struct sys_sendto_args *uap,
syscallarg(const struct sockaddr *) to;
syscallarg(unsigned int) tolen;
} */
struct msghdr msg;
struct msghdr msg = {0};
struct iovec aiov;
msg.msg_name = __UNCONST(SCARG(uap, to)); /* XXXUNCONST kills const */
@ -694,7 +694,7 @@ sys_recvfrom(struct lwp *l, const struct sys_recvfrom_args *uap,
syscallarg(struct sockaddr *) from;
syscallarg(unsigned int *) fromlenaddr;
} */
struct msghdr msg;
struct msghdr msg = {0};
struct iovec aiov;
int error;
struct mbuf *from;