Do not allow the SNPSTTY ioctl for the snoop device that has a tty
attached. Otherwise, the snp->snp_tty would be overwritten, while the tty line discipline still set to the snpdisc. Then snplwrite() causes panic because ttytosnp() cannot find the snp. MFC after: 1 week
This commit is contained in:
parent
fb76e092de
commit
6ed4cfc05d
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=174219
@ -502,6 +502,9 @@ snpioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags,
|
||||
s = *(int *)data;
|
||||
if (s < 0)
|
||||
return (snp_down(snp));
|
||||
if (snp->snp_tty != NULL)
|
||||
return (EBUSY);
|
||||
|
||||
if (fget(td, s, &fp) != 0)
|
||||
return (EINVAL);
|
||||
if (fp->f_type != DTYPE_VNODE ||
|
||||
|
Loading…
Reference in New Issue
Block a user