diff options
| author | joerg <joerg@FreeBSD.org> | 2004-01-07 10:12:59 +0000 |
|---|---|---|
| committer | joerg <joerg@FreeBSD.org> | 2004-01-07 10:12:59 +0000 |
| commit | 94e6e7d168bd2ba66a185425744def4fc3761aef (patch) | |
| tree | 44be24d616fe33fbd1c1bd727ead0c0b5ce997a8 /sys/i386/isa | |
| parent | 67bfe86083a41c907ae64ed3fe8302aa556d4978 (diff) | |
| download | FreeBSD-src-94e6e7d168bd2ba66a185425744def4fc3761aef.zip FreeBSD-src-94e6e7d168bd2ba66a185425744def4fc3761aef.tar.gz | |
Fix a long-standing bug that had been introduced in rev 1.24 with the
replacement of struct proc by struct thread. This bug could cause a
NULL pointer dereferencation under certain circumstances (e. g. while
running /etc/rc.d/pcvt).
Diffstat (limited to 'sys/i386/isa')
| -rw-r--r-- | sys/i386/isa/pcvt/pcvt_ext.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sys/i386/isa/pcvt/pcvt_ext.c b/sys/i386/isa/pcvt/pcvt_ext.c index e2897b5..ea02437f 100644 --- a/sys/i386/isa/pcvt/pcvt_ext.c +++ b/sys/i386/isa/pcvt/pcvt_ext.c @@ -2397,7 +2397,7 @@ vgapage(int new_screen) int usl_vt_ioctl(dev_t dev, int cmd, caddr_t data, int flag, struct thread *td) { - struct proc *p = td->td_proc; + struct proc *p; int i, j, error, opri; struct vt_mode newmode; @@ -2406,6 +2406,7 @@ usl_vt_ioctl(dev_t dev, int cmd, caddr_t data, int flag, struct thread *td) case VT_SETMODE: newmode = *(struct vt_mode *)data; + p = td->td_proc; opri = spltty(); @@ -2479,6 +2480,8 @@ usl_vt_ioctl(dev_t dev, int cmd, caddr_t data, int flag, struct thread *td) return 0; case VT_RELDISP: + p = td->td_proc; + if (minor(dev) != current_video_screen) return EPERM; if (vsp->smode.mode != VT_PROCESS) |
