diff options
| author | Arvind Yadav <arvind.yadav.cs@gmail.com> | 2016-12-12 23:13:27 +0530 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-07-04 11:51:31 +0200 |
| commit | b5bfd2739189db70ec4448140639d15a2445e842 (patch) | |
| tree | 62b264cc68b743024585121e8c3411db67441683 | |
| parent | 02a1e447bf1d0fc303ae362800dd7813b70bc372 (diff) | |
ata: sata_mv:- Handle return value of devm_ioremap.
commit 064c3db9c564cc5be514ac21fb4aa26cc33db746 upstream.
Here, If devm_ioremap will fail. It will return NULL.
Then hpriv->base = NULL - 0x20000; Kernel can run into
a NULL-pointer dereference. This error check will avoid
NULL pointer dereference.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Willy Tarreau <w@1wt.eu>
| -rw-r--r-- | drivers/ata/sata_mv.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c index b256ff5b6..d9f45c821 100644 --- a/drivers/ata/sata_mv.c +++ b/drivers/ata/sata_mv.c @@ -4097,6 +4097,9 @@ static int mv_platform_probe(struct platform_device *pdev) host->iomap = NULL; hpriv->base = devm_ioremap(&pdev->dev, res->start, resource_size(res)); + if (!hpriv->base) + return -ENOMEM; + hpriv->base -= SATAHC0_REG_BASE; #if defined(CONFIG_HAVE_CLK) |