* [PATCH] tty: ipwireless: fix missing checks for ioremap
@ 2019-03-14 7:05 Kangjie Lu
2019-03-14 12:35 ` David Sterba
0 siblings, 1 reply; 3+ messages in thread
From: Kangjie Lu @ 2019-03-14 7:05 UTC (permalink / raw)
To: kjlu
Cc: pakki001, Jiri Kosina, David Sterba, Greg Kroah-Hartman,
Jiri Slaby, linux-kernel
ipw->attr_memory and ipw->common_memory are assigned with the
return value of ioremap. ioremap may fail, but not checks
are enforced. The fix insertss the checks.
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
---
drivers/tty/ipwireless/main.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/tty/ipwireless/main.c b/drivers/tty/ipwireless/main.c
index 3475e841ef5c..4c18bbfe1a92 100644
--- a/drivers/tty/ipwireless/main.c
+++ b/drivers/tty/ipwireless/main.c
@@ -114,6 +114,10 @@ static int ipwireless_probe(struct pcmcia_device *p_dev, void *priv_data)
ipw->common_memory = ioremap(p_dev->resource[2]->start,
resource_size(p_dev->resource[2]));
+ if (!ipw->common_memory) {
+ ret = -ENOMEM;
+ goto exit1;
+ }
if (!request_mem_region(p_dev->resource[2]->start,
resource_size(p_dev->resource[2]),
IPWIRELESS_PCCARD_NAME)) {
@@ -134,6 +138,10 @@ static int ipwireless_probe(struct pcmcia_device *p_dev, void *priv_data)
ipw->attr_memory = ioremap(p_dev->resource[3]->start,
resource_size(p_dev->resource[3]));
+ if (!ipw->attr_memory) {
+ ret = -ENOMEM;
+ goto exit3;
+ }
if (!request_mem_region(p_dev->resource[3]->start,
resource_size(p_dev->resource[3]),
IPWIRELESS_PCCARD_NAME)) {
--
2.17.1
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH] tty: ipwireless: fix missing checks for ioremap
2019-03-14 7:05 [PATCH] tty: ipwireless: fix missing checks for ioremap Kangjie Lu
@ 2019-03-14 12:35 ` David Sterba
2019-03-15 7:07 ` [PATCH v2] " Kangjie Lu
0 siblings, 1 reply; 3+ messages in thread
From: David Sterba @ 2019-03-14 12:35 UTC (permalink / raw)
To: Kangjie Lu
Cc: Jiri Kosina, Greg Kroah-Hartman, Jiri Slaby, pakki001, linux-kernel
On Thu, Mar 14, 2019 at 02:05:32AM -0500, Kangjie Lu wrote:
> ipw->attr_memory and ipw->common_memory are assigned with the
> return value of ioremap. ioremap may fail, but not checks
> are enforced. The fix insertss the checks.
Please fix the typos and resend, otherwise ok. Thanks.
>
> Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Reviewed-by: David Sterba <dsterba@suse.com>
^ permalink raw reply [flat|nested] 3+ messages in thread
* [PATCH v2] tty: ipwireless: fix missing checks for ioremap
2019-03-14 12:35 ` David Sterba
@ 2019-03-15 7:07 ` Kangjie Lu
0 siblings, 0 replies; 3+ messages in thread
From: Kangjie Lu @ 2019-03-15 7:07 UTC (permalink / raw)
To: kjlu
Cc: pakki001, Jiri Kosina, David Sterba, Greg Kroah-Hartman,
Jiri Slaby, linux-kernel
ipw->attr_memory and ipw->common_memory are assigned with the
return value of ioremap. ioremap may fail, but no checks
are enforced. The fix inserts the checks to avoid potential
NULL pointer dereferences.
Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Reviewed-by: David Sterba <dsterba@suse.com>
---
V2: fix typos
---
drivers/tty/ipwireless/main.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/tty/ipwireless/main.c b/drivers/tty/ipwireless/main.c
index 3475e841ef5c..4c18bbfe1a92 100644
--- a/drivers/tty/ipwireless/main.c
+++ b/drivers/tty/ipwireless/main.c
@@ -114,6 +114,10 @@ static int ipwireless_probe(struct pcmcia_device *p_dev, void *priv_data)
ipw->common_memory = ioremap(p_dev->resource[2]->start,
resource_size(p_dev->resource[2]));
+ if (!ipw->common_memory) {
+ ret = -ENOMEM;
+ goto exit1;
+ }
if (!request_mem_region(p_dev->resource[2]->start,
resource_size(p_dev->resource[2]),
IPWIRELESS_PCCARD_NAME)) {
@@ -134,6 +138,10 @@ static int ipwireless_probe(struct pcmcia_device *p_dev, void *priv_data)
ipw->attr_memory = ioremap(p_dev->resource[3]->start,
resource_size(p_dev->resource[3]));
+ if (!ipw->attr_memory) {
+ ret = -ENOMEM;
+ goto exit3;
+ }
if (!request_mem_region(p_dev->resource[3]->start,
resource_size(p_dev->resource[3]),
IPWIRELESS_PCCARD_NAME)) {
--
2.17.1
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2019-03-15 7:07 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2019-03-14 7:05 [PATCH] tty: ipwireless: fix missing checks for ioremap Kangjie Lu
2019-03-14 12:35 ` David Sterba
2019-03-15 7:07 ` [PATCH v2] " Kangjie Lu
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