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TTY/Serial fixes for 5.17-rc4

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Here are 4 small tty/serial fixes for 5.17-rc4.  They are:
 	- 8250_pericom change revert to fix a reported regression
 	- 2 speculation fixes for vt_ioctl
 	- n_tty regression fix for polling
 
 All of these have been in linux-next for a while with no reported
 issues.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

Pull tty/serial fixes from Greg KH:
 "Here are four small tty/serial fixes for 5.17-rc4.  They are:

   - 8250_pericom change revert to fix a reported regression

   - two speculation fixes for vt_ioctl

   - n_tty regression fix for polling

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  vt_ioctl: add array_index_nospec to VT_ACTIVATE
  vt_ioctl: fix array_index_nospec in vt_setactivate
  serial: 8250_pericom: Revert "Re-enable higher baud rates"
  n_tty: wake up poll(POLLRDNORM) on receiving data
This commit is contained in:
Linus Torvalds 2022-02-12 10:01:55 -08:00
commit 522e7d03f7
3 changed files with 5 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/tty/n_tty.c
View file

@ -1329,7 +1329,7 @@ static void n_tty_receive_char_special(struct tty_struct *tty, unsigned char c)
put_tty_queue(c, ldata);
smp_store_release(&ldata->canon_head, ldata->read_head);
kill_fasync(&tty->fasync, SIGIO, POLL_IN);
wake_up_interruptible_poll(&tty->read_wait, EPOLLIN);
wake_up_interruptible_poll(&tty->read_wait, EPOLLIN | EPOLLRDNORM);
return;
}
}
@ -1561,7 +1561,7 @@ static void __receive_buf(struct tty_struct *tty, const unsigned char *cp,
if (read_cnt(ldata)) {
kill_fasync(&tty->fasync, SIGIO, POLL_IN);
wake_up_interruptible_poll(&tty->read_wait, EPOLLIN);
wake_up_interruptible_poll(&tty->read_wait, EPOLLIN | EPOLLRDNORM);
}
}

2
drivers/tty/serial/8250/8250_pericom.c
View file

@ -117,7 +117,7 @@ static int pericom8250_probe(struct pci_dev *pdev, const struct pci_device_id *i
uart.port.private_data = pericom;
uart.port.iotype = UPIO_PORT;
uart.port.uartclk = 921600 * 16;
uart.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ | UPF_MAGIC_MULTIPLIER;
uart.port.flags = UPF_SKIP_TEST | UPF_BOOT_AUTOCONF | UPF_SHARE_IRQ;
uart.port.set_divisor = pericom_do_set_divisor;
for (i = 0; i < nr && i < maxnr; i++) {
unsigned int offset = (i == 3 && nr == 4) ? 0x38 : i * 0x8;

3
drivers/tty/vt/vt_ioctl.c
View file

@ -599,8 +599,8 @@ static int vt_setactivate(struct vt_setactivate __user *sa)
if (vsa.console == 0 || vsa.console > MAX_NR_CONSOLES)
return -ENXIO;
vsa.console = array_index_nospec(vsa.console, MAX_NR_CONSOLES + 1);
vsa.console--;
vsa.console = array_index_nospec(vsa.console, MAX_NR_CONSOLES);
console_lock();
ret = vc_allocate(vsa.console);
if (ret) {
@ -845,6 +845,7 @@ int vt_ioctl(struct tty_struct *tty,
return -ENXIO;
arg--;
arg = array_index_nospec(arg, MAX_NR_CONSOLES);
console_lock();
ret = vc_allocate(arg);
console_unlock();