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Merge branch 'work.tty-ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

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Pull tty ioctl updates from Al Viro:
 "This is the compat_ioctl work related to tty ioctls.

  Quite a bit of dead code taken out, all tty-related stuff gone from
  fs/compat_ioctl.c. A bunch of compat bugs fixed - some still remain,
  but all more or less generic tty-related ioctls should be covered
  (remaining issues are in things like driver-private ioctls in a pcmcia
  serial card driver not getting properly handled in 32bit processes on
  64bit host, etc)"

* 'work.tty-ioctl' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (53 commits)
  kill TIOCSERGSTRUCT
  change semantics of ldisc ->compat_ioctl()
  kill TIOCSER[SG]WILD
  synclink_gt(): fix compat_ioctl()
  pty: fix compat ioctls
  compat_ioctl - kill keyboard ioctl handling
  gigaset: add ->compat_ioctl()
  vt_compat_ioctl(): clean up, use compat_ptr() properly
  gigaset: don't try to printk userland buffer contents
  dgnc: don't bother with (empty) stub for TCXONC
  dgnc: leave TIOC[GS]SOFTCAR to ldisc
  remove fallback to drivers for TIOCGICOUNT
  dgnc: break-related ioctls won't reach ->ioctl()
  kill the rest of tty COMPAT_IOCTL() entries
  dgnc: TIOCM... won't reach ->ioctl()
  isdn_tty: TCSBRK{,P} won't reach ->ioctl()
  kill capinc_tty_ioctl()
  take compat TIOC[SG]SERIAL treatment into tty_compat_ioctl()
  synclink: reduce pointless checks in ->ioctl()
  complete ->[sg]et_serial() switchover
  ...
This commit is contained in:
Linus Torvalds
2018-10-24 14:43:41 +01:00
parent 08ffb584d9 ce5a983191
commit 44adbac8f7
56 changed files with 778 additions and 1521 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/tty/vt/vt_ioctl.c
View File

@@ -1175,17 +1175,13 @@ long vt_compat_ioctl(struct tty_struct *tty,
{
struct vc_data *vc = tty->driver_data;
struct console_font_op op; /* used in multiple places here */
unsigned int console;
void __user *up = (void __user *)arg;
unsigned int console = vc->vc_num;
void __user *up = compat_ptr(arg);
int perm;
int ret = 0;
console = vc->vc_num;
if (!vc_cons_allocated(console)) { /* impossible? */
ret = -ENOIOCTLCMD;
goto out;
}
if (!vc_cons_allocated(console)) /* impossible? */
return -ENOIOCTLCMD;
/*
* To have permissions to do most of the vt ioctls, we either have
@@ -1201,17 +1197,14 @@ long vt_compat_ioctl(struct tty_struct *tty,
*/
case PIO_FONTX:
case GIO_FONTX:
ret = compat_fontx_ioctl(cmd, up, perm, &op);
break;
return compat_fontx_ioctl(cmd, up, perm, &op);
case KDFONTOP:
ret = compat_kdfontop_ioctl(up, perm, &op, vc);
break;
return compat_kdfontop_ioctl(up, perm, &op, vc);
case PIO_UNIMAP:
case GIO_UNIMAP:
ret = compat_unimap_ioctl(cmd, up, perm, vc);
break;
return compat_unimap_ioctl(cmd, up, perm, vc);
/*
* all these treat 'arg' as an integer
@@ -1236,21 +1229,15 @@ long vt_compat_ioctl(struct tty_struct *tty,
case VT_DISALLOCATE:
case VT_RESIZE:
case VT_RESIZEX:
goto fallback;
return vt_ioctl(tty, cmd, arg);
/*
* the rest has a compatible data structure behind arg,
* but we have to convert it to a proper 64 bit pointer.
*/
default:
arg = (unsigned long)compat_ptr(arg);
goto fallback;
return vt_ioctl(tty, cmd, (unsigned long)up);
}
out:
return ret;
fallback:
return vt_ioctl(tty, cmd, arg);
}