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| author |   Kangjie Lu <kjlu@umn.edu> | 2019-03-15 02:07:12 -0500 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-03-28 01:28:23 +0900 |
| commit | 1bbb1c318cd8a3a39e8c3e2e83d5e90542d6c3e3 (patch) | |
| tree | 9b2823d0e57404a05ad09065eed8650df3790ff3 /drivers/tty/ipwireless | |
| parent | tty: fix read of tty->pgrp outside of ctrl_lock (diff) | |
| download | linux-dev-1bbb1c318cd8a3a39e8c3e2e83d5e90542d6c3e3.tar.xz linux-dev-1bbb1c318cd8a3a39e8c3e2e83d5e90542d6c3e3.zip | |
tty: ipwireless: fix missing checks for ioremap
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/ipwireless')
| -rw-r--r-- | drivers/tty/ipwireless/main.c | 8 |
1 files changed, 8 insertions, 0 deletions
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)) { |