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From: Gen Zhang <blackgod016574@gmail.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] vt: Fix a missing-check bug in drivers/tty/vt/vt.c file of Linux 5.0.14
Date: Sun, 12 May 2019 11:27:19 +0800	[thread overview]
Message-ID: <20190512032719.GA16296@zhanggen-UX430UQ> (raw)
In-Reply-To: <20190511060741.GC18755@kroah.com>

On Sat, May 11, 2019 at 08:07:41AM +0200, Greg KH wrote:
> Look at the patch above, all of the whitespace is damaged.  There is no
> way you took the raw email and then were able to apply that to the
> kernel tree.
> 
> You can not cut/paste patches into gmail, please read the kernel
> Documentation file all about email clients and how to get them to work
> properly to send patches.
Hi Greg,
I switched to mutt and get rid of cut/paste.
I patched it successffully with commit 1fb3b526df3bd7647e7854915ae6b22299408baf.
The patch file is:
---
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index fdd12f8..b756609 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -3350,10 +3350,14 @@ static int __init con_init(void)
 
 	for (currcons = 0; currcons < MIN_NR_CONSOLES; currcons++) {
 		vc_cons[currcons].d = vc = kzalloc(sizeof(struct vc_data), GFP_NOWAIT);
+		if (!vc_cons[currcons].d || !vc)
+			goto err_vc;
 		INIT_WORK(&vc_cons[currcons].SAK_work, vc_SAK);
 		tty_port_init(&vc->port);
 		visual_init(vc, currcons, 1);
 		vc->vc_screenbuf = kzalloc(vc->vc_screenbuf_size, GFP_NOWAIT);
+		if (!vc->vc_screenbuf)
+			goto err_vc_screenbuf;
 		vc_init(vc, vc->vc_rows, vc->vc_cols,
 			currcons || !vc->vc_sw->con_save_screen);
 	}
@@ -3375,6 +3379,14 @@ static int __init con_init(void)
 	register_console(&vt_console_driver);
 #endif
 	return 0;
+err_vc:
+	console_unlock();
+	return -ENOMEM;
+err_vc_screenbuf:
+	console_unlock();
+	kfree(vc);
+	vc_cons[currcons].d = NULL;
+	return -ENOMEM;
 }
 console_initcall(con_init);
 
 ---
I hope that the format is not broken any more.
As for whether the patch should be applied, it is totally your call.
Anyway, thanks for your patient reply!
Gen

  reply	other threads:[~2019-05-12  3:27 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CAAie0ar11_mPipN=d=mrgnVdEMO1Np0cCYdqcRfZrij_d-5zaQ@mail.gmail.com>
     [not found] ` <20190510051415.GA6073@kroah.com>
     [not found]   ` <CAAie0ao_O0hcUOuUf67oog+dSswdQRpAtX8NyQvDAr_XQr=xQg@mail.gmail.com>
2019-05-10 15:12     ` Greg KH
     [not found]       ` <CAAie0arnSxFvkNE1KSxD1a19_PQy03Q4RSiLZo9t7C9LeKkA9w@mail.gmail.com>
2019-05-11  6:07         ` Greg KH
2019-05-12  3:27           ` Gen Zhang [this message]
2019-05-12  6:20             ` Greg KH
2019-05-12  8:49               ` Gen Zhang
2019-05-13  7:36                 ` Greg KH
2019-05-13  9:37                   ` Gen Zhang
2019-05-13  9:58                     ` Greg KH
2019-05-13 11:33                       ` Gen Zhang
2019-05-16  9:07                       ` Gen Zhang

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