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utrace(2): limit size of user data to KTR_USER_MAXLEN (currently 2048); return EINVAL if 'len' is bigger

This commit is contained in:
jdolecek 2001-01-05 22:25:26 +00:00
parent 2bd5bf0ec2
commit d7f811d098
2 changed files with 6 additions and 2 deletions
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5
sys/kern/kern_ktrace.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: kern_ktrace.c,v 1.52 2001/01/05 21:42:09 jdolecek Exp $ */
/* $NetBSD: kern_ktrace.c,v 1.53 2001/01/05 22:25:26 jdolecek Exp $ */
/*
* Copyright (c) 1989, 1993
@ -673,6 +673,9 @@ sys_utrace(p, v, retval)
if (!KTRPOINT(p, KTR_USER))
return (0);
if (SCARG(uap, len) > KTR_USER_MAXLEN)
return (EINVAL);
ktruser(p, SCARG(uap, label), SCARG(uap, addr), SCARG(uap, len), 1);
return (0);

3
sys/sys/ktrace.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: ktrace.h,v 1.21 2000/12/28 11:10:17 jdolecek Exp $ */
/* $NetBSD: ktrace.h,v 1.22 2001/01/05 22:25:27 jdolecek Exp $ */
/*
* Copyright (c) 1988, 1993
@ -145,6 +145,7 @@ struct ktr_csw {
*/
#define KTR_USER 8
#define KTR_USER_MAXIDLEN 20
#define KTR_USER_MAXLEN 2048 /* maximum length of passed data */
struct ktr_user {
char ktr_id[KTR_USER_MAXIDLEN]; /* string id of caller */
/*