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add the same fix to pcvt that I did to syscons. Make sure that the signals

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provided by the user are valid else return EINVAL.

Reviewed-by: joerg
This commit is contained in:
John-Mark Gurney 1997-03-02 14:03:33 +00:00
parent 3b96d4d951
commit 4eaede87b0
1 changed files with 11 additions and 3 deletions
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14
sys/i386/isa/pcvt/pcvt_ext.c
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@ -72,6 +72,8 @@
#include <i386/isa/pcvt/pcvt_hdr.h> /* global include */
#define ISSIGVALID(sig) ((sig) > 0 && (sig) < NSIG)
static int s3testwritable( void );
static int et4000_col( int );
static int wd90c11_col( int );
@ -2505,9 +2507,15 @@ usl_vt_ioctl(Dev_t dev, int cmd, caddr_t data, int flag, struct proc *p)
return EBUSY; /* already in use on this VT */
}
vsp->smode = newmode;
vsp->proc = p;
vsp->pid = p->p_pid;
if (ISSIGVALID(newmode->relsig) && ISSIGVALID(newmode->acqsig)
&& ISSIGVALID(newmode->frsig)) {
vsp->smode = newmode;
vsp->proc = p;
vsp->pid = p->p_pid;
} else {
splx(opri);
return EINVAL;
}
#if PCVT_FREEBSD > 206
/*