From: Jiri Slaby <jslaby@suse.cz>
To: gregkh@linuxfoundation.org
Cc: linux-serial@vger.kernel.org, linux-kernel@vger.kernel.org,
Jiri Slaby <jslaby@suse.cz>
Subject: [PATCH 06/16] vc_screen: sanitize types in vcs_write
Date: Tue, 18 Aug 2020 10:56:56 +0200 [thread overview]
Message-ID: <20200818085706.12163-6-jslaby@suse.cz> (raw)
In-Reply-To: <20200818085706.12163-1-jslaby@suse.cz>
* ret can carry error codes, so make it signed, i.e. ssize_t
* pos is derived from the passed ppos, so make it long enough, i.e.
loff_t
* attr is a boolean, so...
* size is limited by vcs_size() which returns an int
* written, p, orig_count and this_round are always ">= 0" and "< size",
so uint is enough
* col and max_col are derived from vc->vc_cols (uint) and p, so make
them uint too
* place con_buf0 and con_buf declaration to a single line
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
drivers/tty/vt/vc_screen.c | 17 +++++++----------
1 file changed, 7 insertions(+), 10 deletions(-)
diff --git a/drivers/tty/vt/vc_screen.c b/drivers/tty/vt/vc_screen.c
index 8aa0d50bcac7..2571d9067b08 100644
--- a/drivers/tty/vt/vc_screen.c
+++ b/drivers/tty/vt/vc_screen.c
@@ -459,14 +459,13 @@ vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
{
struct inode *inode = file_inode(file);
struct vc_data *vc;
- long pos;
- long attr, size, written;
- char *con_buf0;
- int col, maxcol;
+ char *con_buf0, *con_buf;
u16 *org0 = NULL, *org = NULL;
- size_t ret;
- char *con_buf;
- bool viewed;
+ unsigned int written, col, maxcol;
+ int size;
+ ssize_t ret;
+ loff_t pos;
+ bool viewed, attr;
if (use_unicode(inode))
return -EOPNOTSUPP;
@@ -500,9 +499,7 @@ vcs_write(struct file *file, const char __user *buf, size_t count, loff_t *ppos)
count = size - pos;
written = 0;
while (count) {
- long this_round = count;
- size_t orig_count;
- long p;
+ unsigned int orig_count, p, this_round = count;
if (this_round > CON_BUF_SIZE)
this_round = CON_BUF_SIZE;
--
2.28.0
next prev parent reply other threads:[~2020-08-18 8:58 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-18 8:56 [PATCH 01/16] vt: make vc_data pointers const in selection.h Jiri Slaby
2020-08-18 8:56 ` [PATCH 02/16] vt: declare xy for get/putconsxy properly Jiri Slaby
2020-08-18 11:43 ` Greg KH
2020-08-19 7:09 ` Jiri Slaby
2020-08-18 8:56 ` [PATCH 03/16] vc: propagate "viewed as bool" from screenpos up Jiri Slaby
2020-08-18 8:56 ` [PATCH 04/16] vc_screen: document and cleanup vcs_vc Jiri Slaby
2020-08-18 8:56 ` [PATCH 05/16] vc_screen: rewrite vcs_size to accept vc, not inode Jiri Slaby
2020-08-18 8:56 ` Jiri Slaby [this message]
2020-08-18 8:56 ` [PATCH 07/16] vc_screen: extract vcs_write_buf_noattr Jiri Slaby
2020-08-18 8:56 ` [PATCH 08/16] vc_screen: extract vcs_write_buf Jiri Slaby
2020-08-18 8:56 ` [PATCH 09/16] vc_screen: eliminate ifdefs from vcs_write_buf Jiri Slaby
2020-08-18 8:57 ` [PATCH 10/16] vc_screen: sanitize types in vcs_read Jiri Slaby
2020-08-18 8:57 ` [PATCH 11/16] vs_screen: kill tmp_count from vcs_read Jiri Slaby
2020-08-18 8:57 ` [PATCH 12/16] vc_screen: extract vcs_read_buf_uni Jiri Slaby
2020-08-18 8:57 ` [PATCH 13/16] vc_screen: extract vcs_read_buf_noattr Jiri Slaby
2020-08-18 8:57 ` [PATCH 14/16] vc_screen: extract vcs_read_buf Jiri Slaby
2020-08-18 8:57 ` [PATCH 15/16] vc_screen: extract vcs_read_buf_header Jiri Slaby
2020-08-25 16:48 ` Peilin Ye
2020-08-25 16:59 ` Greg KH
2020-08-25 17:12 ` Peilin Ye
2020-08-18 8:57 ` [PATCH 16/16] vc_screen: prune macros Jiri Slaby
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