From 2f7c68cb55ecb7331f2381deb497c27155f32faf Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 03 Jan 2024 09:43:39 +0000
Subject: [PATCH] update kernel to 5.10.198
---
kernel/drivers/tty/tty_io.c | 13 ++++++++-----
1 files changed, 8 insertions(+), 5 deletions(-)
diff --git a/kernel/drivers/tty/tty_io.c b/kernel/drivers/tty/tty_io.c
index 669aef7..094e82a 100644
--- a/kernel/drivers/tty/tty_io.c
+++ b/kernel/drivers/tty/tty_io.c
@@ -108,6 +108,7 @@
#include <linux/kmod.h>
#include <linux/nsproxy.h>
+#include "tty.h"
#undef TTY_DEBUG_HANGUP
#ifdef TTY_DEBUG_HANGUP
@@ -941,13 +942,13 @@
return i;
}
-static void tty_write_unlock(struct tty_struct *tty)
+void tty_write_unlock(struct tty_struct *tty)
{
mutex_unlock(&tty->atomic_write_lock);
wake_up_interruptible_poll(&tty->write_wait, EPOLLOUT);
}
-static int tty_write_lock(struct tty_struct *tty, int ndelay)
+int tty_write_lock(struct tty_struct *tty, int ndelay)
{
if (!mutex_trylock(&tty->atomic_write_lock)) {
if (ndelay)
@@ -1237,14 +1238,16 @@
{
struct tty_struct *tty;
- if (driver->ops->lookup)
+ if (driver->ops->lookup) {
if (!file)
tty = ERR_PTR(-EIO);
else
tty = driver->ops->lookup(driver, file, idx);
- else
+ } else {
+ if (idx >= driver->num)
+ return ERR_PTR(-EINVAL);
tty = driver->ttys[idx];
-
+ }
if (!IS_ERR(tty))
tty_kref_get(tty);
return tty;
--
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