linux-kernel - [PATCH 5.15 051/779] parisc: Check the return value of ioremap() in lba_driver

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Message-Id: <20220815180339.461010784@linuxfoundation.org>
Date:   Mon, 15 Aug 2022 19:54:55 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Hacash Robot <hacashRobot@...tino.com>,
        William Dean <williamsukatube@...il.com>,
        Helge Deller <deller@....de>
Subject: [PATCH 5.15 051/779] parisc: Check the return value of ioremap() in lba_driver_probe()

From: William Dean <williamsukatube@...il.com>

commit cf59f34d7f978d14d6520fd80a78a5ad5cb8abf8 upstream.

The function ioremap() in lba_driver_probe() can fail, so
its return value should be checked.

Fixes: 4bdc0d676a643 ("remove ioremap_nocache and devm_ioremap_nocache")
Reported-by: Hacash Robot <hacashRobot@...tino.com>
Signed-off-by: William Dean <williamsukatube@...il.com>
Signed-off-by: Helge Deller <deller@....de>
Cc: <stable@...r.kernel.org> # v5.6+
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/parisc/lba_pci.c |    6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

--- a/drivers/parisc/lba_pci.c
+++ b/drivers/parisc/lba_pci.c
@@ -1476,9 +1476,13 @@ lba_driver_probe(struct parisc_device *d
 	u32 func_class;
 	void *tmp_obj;
 	char *version;
-	void __iomem *addr = ioremap(dev->hpa.start, 4096);
+	void __iomem *addr;
 	int max;
 
+	addr = ioremap(dev->hpa.start, 4096);
+	if (addr == NULL)
+		return -ENOMEM;
+
 	/* Read HW Rev First */
 	func_class = READ_REG32(addr + LBA_FCLASS);