-Consistently check the buffer length in getsysinfo(),
and require one additional byte for string termination in the GSI_PLATFORM_NAME case. This should fix PR kern/33198 by Nicolas Joly. -Make sysinfo() behave more like the original: return the length needed and copy out as much as possible.
This commit is contained in:
drochner
parent
9813c5ea29
commit
61f5f2c87d
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@ -1,4 +1,4 @@
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/* $NetBSD: osf1_misc.c,v 1.71 2005/12/11 12:20:23 christos Exp $ */
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/* $NetBSD: osf1_misc.c,v 1.72 2006/04/05 15:30:48 drochner Exp $ */
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/*
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* Copyright (c) 1999 Christopher G. Demetriou. All rights reserved.
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@ -58,7 +58,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: osf1_misc.c,v 1.71 2005/12/11 12:20:23 christos Exp $");
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__KERNEL_RCSID(0, "$NetBSD: osf1_misc.c,v 1.72 2006/04/05 15:30:48 drochner Exp $");
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#if defined(_KERNEL_OPT)
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#include "opt_syscall_debug.h"
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@ -171,100 +171,84 @@ osf1_sys_getsysinfo(struct lwp *l, void *v, register_t *retval)
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long proctype;
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u_int64_t fpflags;
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struct osf1_cpu_info cpuinfo;
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const void *data;
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size_t datalen;
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error = 0;
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switch(SCARG(uap, op))
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{
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case OSF_GET_MAX_UPROCS:
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error = copyout(&maxproc, SCARG(uap, buffer), sizeof(maxproc));
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retval[0] = 1;
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data = &maxproc;
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datalen = sizeof(maxproc);
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break;
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case OSF_GET_PHYSMEM:
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error = copyout(&physmem, SCARG(uap, buffer),
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sizeof(physmem));
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retval[0] = 1;
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data = &physmem;
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datalen = sizeof(physmem);
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break;
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case OSF_GET_MAX_CPU:
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case OSF_GET_CPUS_IN_BOX:
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error = copyout(&ncpus, SCARG(uap, buffer), sizeof(ncpus));
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retval[0] = 1;
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data = &ncpus;
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datalen = sizeof(ncpus);
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break;
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case OSF_GET_IEEE_FP_CONTROL:
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if (((fpflags = alpha_read_fp_c(l)) & IEEE_INHERIT) != 0) {
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fpflags |= 1ULL << 63;
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fpflags &= ~IEEE_INHERIT;
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}
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error = copyout(&fpflags, SCARG(uap, buffer), sizeof fpflags);
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retval[0] = 1;
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data = &fpflags;
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datalen = sizeof(fpflags);
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break;
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case OSF_GET_CPU_INFO:
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if (SCARG(uap, nbytes) < sizeof(cpuinfo))
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error = EINVAL;
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else {
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memset(&cpuinfo, 0, sizeof(cpuinfo));
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memset(&cpuinfo, 0, sizeof(cpuinfo));
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#ifdef __alpha__
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unit = alpha_pal_whami();
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unit = alpha_pal_whami();
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#else
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unit = 0; /* XXX */
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unit = 0; /* XXX */
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#endif
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cpuinfo.current_cpu = unit;
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cpuinfo.cpus_in_box = ncpus;
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cpuinfo.cpu_type =
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LOCATE_PCS(hwrpb, unit)->pcs_proc_type;
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cpuinfo.ncpus = ncpus;
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cpuinfo.cpus_present = ncpus;
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cpuinfo.cpus_running = ncpus;
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cpuinfo.cpu_binding = 1;
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cpuinfo.cpu_ex_binding = 0;
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cpuinfo.mhz = hwrpb->rpb_cc_freq / 1000000;
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error = copyout(&cpuinfo, SCARG(uap, buffer),
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sizeof(cpuinfo));
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retval[0] = 1;
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}
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cpuinfo.current_cpu = unit;
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cpuinfo.cpus_in_box = ncpus;
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cpuinfo.cpu_type = LOCATE_PCS(hwrpb, unit)->pcs_proc_type;
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cpuinfo.ncpus = ncpus;
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cpuinfo.cpus_present = ncpus;
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cpuinfo.cpus_running = ncpus;
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cpuinfo.cpu_binding = 1;
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cpuinfo.cpu_ex_binding = 0;
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cpuinfo.mhz = hwrpb->rpb_cc_freq / 1000000;
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data = &cpuinfo;
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datalen = sizeof(cpuinfo);
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break;
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case OSF_GET_PROC_TYPE:
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if(SCARG(uap, nbytes) < sizeof(proctype))
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error = EINVAL;
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else {
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#ifdef __alpha__
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unit = alpha_pal_whami();
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proctype = LOCATE_PCS(hwrpb, unit)->pcs_proc_type;
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unit = alpha_pal_whami();
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proctype = LOCATE_PCS(hwrpb, unit)->pcs_proc_type;
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#else
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proctype = 0; /* XXX */
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proctype = 0; /* XXX */
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#endif
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error = copyout (&proctype, SCARG(uap, buffer),
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sizeof(percpu));
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retval[0] = 1;
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}
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break;
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case OSF_GET_HWRPB: { /* note -- osf/1 doesn't have rpb_tbhint[8] */
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unsigned long rpb_size;
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rpb_size = (unsigned long)hwrpb->rpb_size;
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if (SCARG(uap, nbytes) < rpb_size){
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uprintf("nbytes = %ld, sizeof(struct rpb) = %ld\n",
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SCARG(uap, nbytes), rpb_size);
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error = EINVAL;
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}
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else {
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error = copyout(hwrpb, SCARG(uap, buffer), rpb_size);
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retval[0] = 1;
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}
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}
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data = &proctype;
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datalen = sizeof(percpu);
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break;
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case OSF_GET_HWRPB: /* note -- osf/1 doesn't have rpb_tbhint[8] */
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data = hwrpb;
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datalen = hwrpb->rpb_size;
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break;
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case OSF_GET_PLATFORM_NAME:
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error = copyout(platform.model, SCARG(uap, buffer),
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strlen(platform.model));
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retval[0] = 1;
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data = platform.model;
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datalen = strlen(platform.model) + 1;
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break;
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default:
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printf("osf1_getsysinfo called with unknown op=%ld\n",
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SCARG(uap, op));
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//return EINVAL;
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/* return EINVAL; */
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return 0;
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}
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return(error);
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if (SCARG(uap, nbytes) < datalen)
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return (EINVAL);
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error = copyout(data, SCARG(uap, buffer), datalen);
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if (!error)
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retval[0] = 1;
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return (error);
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}
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int
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@ -304,6 +288,7 @@ osf1_sys_sysinfo(l, v, retval)
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{
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struct osf1_sys_sysinfo_args *uap = v;
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const char *string;
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size_t slen;
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int error;
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error = 0;
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@ -356,13 +341,15 @@ should_handle:
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printf("osf1_sys_sysinfo(%d, %p, 0x%lx)\n", SCARG(uap, cmd),
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SCARG(uap, buf), SCARG(uap,len));
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dont_care:
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error = EINVAL;
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break;
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return (EINVAL);
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};
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if (error == 0)
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error = copyoutstr(string, SCARG(uap, buf), SCARG(uap, len),
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NULL);
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slen = strlen(string) + 1;
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if (SCARG(uap, buf))
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error = copyout(string, SCARG(uap, buf),
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min(slen, SCARG(uap, len)));
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if (!error)
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retval[0] = slen;
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return (error);
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}
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