Module Name: src Committed By: kamil Date: Sat Oct 12 12:04:37 UTC 2019
Modified Files: src/sys/kern: sys_ptrace_common.c Log Message: Avoid signed integer overflow for -lwp where lwp is INT_MIN Reported-by: syzbot+68b80b44b898e66da...@syzkaller.appspotmail.com To generate a diff of this commit: cvs rdiff -u -r1.66 -r1.67 src/sys/kern/sys_ptrace_common.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/sys_ptrace_common.c diff -u src/sys/kern/sys_ptrace_common.c:1.66 src/sys/kern/sys_ptrace_common.c:1.67 --- src/sys/kern/sys_ptrace_common.c:1.66 Wed Oct 9 13:19:43 2019 +++ src/sys/kern/sys_ptrace_common.c Sat Oct 12 12:04:37 2019 @@ -1,4 +1,4 @@ -/* $NetBSD: sys_ptrace_common.c,v 1.66 2019/10/09 13:19:43 kamil Exp $ */ +/* $NetBSD: sys_ptrace_common.c,v 1.67 2019/10/12 12:04:37 kamil Exp $ */ /*- * Copyright (c) 2008, 2009 The NetBSD Foundation, Inc. @@ -118,7 +118,7 @@ */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: sys_ptrace_common.c,v 1.66 2019/10/09 13:19:43 kamil Exp $"); +__KERNEL_RCSID(0, "$NetBSD: sys_ptrace_common.c,v 1.67 2019/10/12 12:04:37 kamil Exp $"); #ifdef _KERNEL_OPT #include "opt_ptrace.h" @@ -1202,8 +1202,12 @@ do_ptrace(struct ptrace_methods *ptm, st signo = tmp; tmp = 0; /* don't search for LWP */ } - } else + } else if (tmp == INT_MIN) { + error = ESRCH; + break; + } else { tmp = -tmp; + } if (tmp > 0) { if (req == PT_DETACH) {