Module Name: src Committed By: riz Date: Tue Jun 12 23:13:07 UTC 2012
Modified Files: src/sys/arch/amd64/amd64 [netbsd-6]: machdep.c netbsd32_machdep.c Log Message: Pull up following revision(s) (requested by spz in ticket #337): sys/arch/amd64/amd64/machdep.c: revision 1.184 sys/arch/amd64/amd64/netbsd32_machdep.c: revision 1.77 If the user process provided a bogus signal handler address, kill it now instead of trying to jump to the bogus address. To generate a diff of this commit: cvs rdiff -u -r1.175.2.5 -r1.175.2.6 src/sys/arch/amd64/amd64/machdep.c cvs rdiff -u -r1.74.10.1 -r1.74.10.2 \ src/sys/arch/amd64/amd64/netbsd32_machdep.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/arch/amd64/amd64/machdep.c diff -u src/sys/arch/amd64/amd64/machdep.c:1.175.2.5 src/sys/arch/amd64/amd64/machdep.c:1.175.2.6 --- src/sys/arch/amd64/amd64/machdep.c:1.175.2.5 Mon May 21 15:25:56 2012 +++ src/sys/arch/amd64/amd64/machdep.c Tue Jun 12 23:13:07 2012 @@ -1,4 +1,4 @@ -/* $NetBSD: machdep.c,v 1.175.2.5 2012/05/21 15:25:56 riz Exp $ */ +/* $NetBSD: machdep.c,v 1.175.2.6 2012/06/12 23:13:07 riz Exp $ */ /*- * Copyright (c) 1996, 1997, 1998, 2000, 2006, 2007, 2008, 2011 @@ -111,7 +111,7 @@ */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.175.2.5 2012/05/21 15:25:56 riz Exp $"); +__KERNEL_RCSID(0, "$NetBSD: machdep.c,v 1.175.2.6 2012/06/12 23:13:07 riz Exp $"); /* #define XENDEBUG_LOW */ @@ -718,6 +718,16 @@ sendsig_siginfo(const ksiginfo_t *ksi, c /* Remember that we're now on the signal stack. */ if (onstack) l->l_sigstk.ss_flags |= SS_ONSTACK; + + if ((vaddr_t)catcher >= VM_MAXUSER_ADDRESS) { + /* + * process has given an invalid address for the + * handler. Stop it, but do not do it before so + * we can return the right info to userland (or in core dump) + */ + sigexit(l, SIGILL); + /* NOTREACHED */ + } } void Index: src/sys/arch/amd64/amd64/netbsd32_machdep.c diff -u src/sys/arch/amd64/amd64/netbsd32_machdep.c:1.74.10.1 src/sys/arch/amd64/amd64/netbsd32_machdep.c:1.74.10.2 --- src/sys/arch/amd64/amd64/netbsd32_machdep.c:1.74.10.1 Mon May 21 15:25:56 2012 +++ src/sys/arch/amd64/amd64/netbsd32_machdep.c Tue Jun 12 23:13:07 2012 @@ -1,4 +1,4 @@ -/* $NetBSD: netbsd32_machdep.c,v 1.74.10.1 2012/05/21 15:25:56 riz Exp $ */ +/* $NetBSD: netbsd32_machdep.c,v 1.74.10.2 2012/06/12 23:13:07 riz Exp $ */ /* * Copyright (c) 2001 Wasabi Systems, Inc. @@ -36,7 +36,7 @@ */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: netbsd32_machdep.c,v 1.74.10.1 2012/05/21 15:25:56 riz Exp $"); +__KERNEL_RCSID(0, "$NetBSD: netbsd32_machdep.c,v 1.74.10.2 2012/06/12 23:13:07 riz Exp $"); #ifdef _KERNEL_OPT #include "opt_compat_netbsd.h" @@ -280,6 +280,16 @@ netbsd32_sendsig_sigcontext(const ksigin /* Remember that we're now on the signal stack. */ if (onstack) l->l_sigstk.ss_flags |= SS_ONSTACK; + + if ((vaddr_t)catcher >= VM_MAXUSER_ADDRESS32) { + /* + * process has given an invalid address for the + * handler. Stop it, but do not do it before so + * we can return the right info to userland (or in core dump) + */ + sigexit(l, SIGILL); + /* NOTREACHED */ + } } #endif @@ -368,6 +378,16 @@ netbsd32_sendsig_siginfo(const ksiginfo_ /* Remember that we're now on the signal stack. */ if (onstack) l->l_sigstk.ss_flags |= SS_ONSTACK; + + if ((vaddr_t)catcher >= VM_MAXUSER_ADDRESS32) { + /* + * process has given an invalid address for the + * handler. Stop it, but do not do it before so + * we can return the right info to userland (or in core dump) + */ + sigexit(l, SIGILL); + /* NOTREACHED */ + } } void