linux-kernel - [PATCH 05/10] n_gsm: add missing _

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 19 Feb 2020 09:49:44 +0100
From:   Jiri Slaby <jslaby@...e.cz>
To:     gregkh@...uxfoundation.org
Cc:     linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 05/10] n_gsm: add missing __user annotations

sparse warns about incorrect types:
n_gsm.c:2638:35: warning: incorrect type in argument 1 (different address spaces)
n_gsm.c:2638:35:    expected void [noderef] <asn:1> *to
n_gsm.c:2638:35:    got void *

The ioctl handler casts its `arg' to (void *) without __user. Add that.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 drivers/tty/n_gsm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/n_gsm.c b/drivers/tty/n_gsm.c
index 82e3d88c1f3f..d866884c105b 100644
--- a/drivers/tty/n_gsm.c
+++ b/drivers/tty/n_gsm.c
@@ -2638,11 +2638,11 @@ static int gsmld_ioctl(struct tty_struct *tty, struct file *file,
 	switch (cmd) {
 	case GSMIOC_GETCONF:
 		gsm_copy_config_values(gsm, &c);
-		if (copy_to_user((void *)arg, &c, sizeof(c)))
+		if (copy_to_user((void __user *)arg, &c, sizeof(c)))
 			return -EFAULT;
 		return 0;
 	case GSMIOC_SETCONF:
-		if (copy_from_user(&c, (void *)arg, sizeof(c)))
+		if (copy_from_user(&c, (void __user *)arg, sizeof(c)))
 			return -EFAULT;
 		return gsm_config(gsm, &c);
 	case GSMIOC_GETFIRST:
-- 
2.25.0