Date: Tue, 25 Nov 2008 11:03:16 GMT From: Steven Hartland <steven.hartland@multiplay.co.uk> To: freebsd-gnats-submit@FreeBSD.org Subject: bin/129170: truss segv for unknown syscall Message-ID: <200811251103.mAPB3Ghj047379@www.freebsd.org> Resent-Message-ID: <200811251110.mAPBA4u6053206@freefall.freebsd.org>
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>Number: 129170
>Category: bin
>Synopsis: truss segv for unknown syscall
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Nov 25 11:10:04 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator: Steven Hartland
>Release: FreeBSD 7.0
>Organization:
Multiplay
>Environment:
FreeBSD loncore0.multiplay.co.uk 7.0-RELEASE-p3 FreeBSD 7.0-RELEASE-p3 #8: Sat Nov 22 18:46:41 GMT 2008 root@loncore0.multiplay.co.uk:/usr/src/sys/amd64/compile/MULTIPLAY amd64
>Description:
If an application calls an unknown syscall truss will segfault due to an invalid range check on nsyscalls
>How-To-Repeat:
Run an application which calls a syscall that truss doesnt know of e.g. a linux application which calls a syscall >= 311 on FreeBSD 7.0.
>Fix:
Apply the attached patch or derivative there of.
Patch attached with submission follows:
--- amd64-fbsd.c.orig 2008-11-22 03:22:33.000000000 +0000
+++ amd64-fbsd.c 2008-11-22 03:24:57.000000000 +0000
@@ -143,5 +143,5 @@
fsc.number = syscall_num;
fsc.name =
- (syscall_num < 0 || syscall_num > nsyscalls) ? NULL : syscallnames[syscall_num];
+ (syscall_num < 0 || syscall_num >= nsyscalls) ? NULL : syscallnames[syscall_num];
if (!fsc.name) {
fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
--- amd64-fbsd32.c.orig 2008-11-22 03:22:41.000000000 +0000
+++ amd64-fbsd32.c 2008-11-22 03:24:52.000000000 +0000
@@ -153,5 +153,5 @@
fsc.number = syscall_num;
fsc.name =
- (syscall_num < 0 || syscall_num > nsyscalls) ? NULL :
+ (syscall_num < 0 || syscall_num >= nsyscalls) ? NULL :
freebsd32_syscallnames[syscall_num];
if (!fsc.name) {
--- amd64-linux32.c.orig 2008-11-22 03:20:58.000000000 +0000
+++ amd64-linux32.c 2008-11-22 03:21:59.000000000 +0000
@@ -125,5 +125,5 @@
fsc.number = syscall_num;
fsc.name =
- (syscall_num < 0 || syscall_num > nsyscalls) ? NULL : linux32_syscallnames[syscall_num];
+ (syscall_num < 0 || syscall_num >= nsyscalls) ? NULL : linux32_syscallnames[syscall_num];
if (!fsc.name) {
fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
--- i386-fbsd.c.orig 2008-11-22 03:22:50.000000000 +0000
+++ i386-fbsd.c 2008-11-22 03:24:42.000000000 +0000
@@ -148,5 +148,5 @@
fsc.number = syscall_num;
fsc.name =
- (syscall_num < 0 || syscall_num > nsyscalls) ? NULL : syscallnames[syscall_num];
+ (syscall_num < 0 || syscall_num >= nsyscalls) ? NULL : syscallnames[syscall_num];
if (!fsc.name) {
fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
--- i386-linux.c.orig 2008-11-21 14:11:22.000000000 +0000
+++ i386-linux.c 2008-11-25 10:33:43.000000000 +0000
@@ -125,5 +125,5 @@
fsc.number = syscall_num;
fsc.name =
- (syscall_num < 0 || syscall_num > nsyscalls) ? NULL : linux_syscallnames[syscall_num];
+ (syscall_num < 0 || syscall_num >= nsyscalls) ? NULL : linux_syscallnames[syscall_num];
if (!fsc.name) {
fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
--- ia64-fbsd.c.orig 2008-11-22 03:22:57.000000000 +0000
+++ ia64-fbsd.c 2008-11-22 03:24:31.000000000 +0000
@@ -136,5 +136,5 @@
fsc.number = syscall_num;
- fsc.name = (syscall_num < 0 || syscall_num > nsyscalls)
+ fsc.name = (syscall_num < 0 || syscall_num >= nsyscalls)
? NULL : syscallnames[syscall_num];
if (!fsc.name) {
--- powerpc-fbsd.c.orig 2008-11-22 03:23:04.000000000 +0000
+++ powerpc-fbsd.c 2008-11-22 03:24:17.000000000 +0000
@@ -150,5 +150,5 @@
fsc.number = syscall_num;
fsc.name =
- (syscall_num < 0 || syscall_num > nsyscalls) ? NULL : syscallnames[syscall_num];
+ (syscall_num < 0 || syscall_num >= nsyscalls) ? NULL : syscallnames[syscall_num];
if (!fsc.name) {
fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
--- sparc64-fbsd.c.orig 2008-11-25 10:35:56.000000000 +0000
+++ sparc64-fbsd.c 2008-11-25 10:35:45.000000000 +0000
@@ -146,5 +146,5 @@
fsc.number = syscall_num;
fsc.name =
- (syscall_num < 0 || syscall_num >= nsyscalls) ? NULL : syscallnames[syscall_num];
+ (syscall_num < 0 || syscall_num > nsyscalls) ? NULL : syscallnames[syscall_num];
if (!fsc.name) {
fprintf(trussinfo->outfile, "-- UNKNOWN SYSCALL %d --\n", syscall_num);
>Release-Note:
>Audit-Trail:
>Unformatted:
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