d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Fix a long-standing bug that had been introduced in rev 1.24 with the

Browse Source 
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).
This commit is contained in:
Joerg Wunsch 2004-01-07 10:12:59 +00:00
parent e157128762
commit d93dea685d
1 changed files with 4 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
sys/i386/isa/pcvt/pcvt_ext.c
View File

@ -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)