From: William Dean williamsukatube@gmail.com
stable inclusion from stable-v5.10.150 commit f87f720811323a83f701679632b479b1e92fdccd category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I6D0XA
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 26e784433e6c65735cd6d93a8db52531970d9a60 ]
The function devm_ioremap() in docg3_probe() can fail, so its return value should be checked.
Fixes: 82402aeb8c81e ("mtd: docg3: Use devm_*() functions") Reported-by: Hacash Robot hacashRobot@santino.com Signed-off-by: William Dean williamsukatube@gmail.com Signed-off-by: Miquel Raynal miquel.raynal@bootlin.com Link: https://lore.kernel.org/linux-mtd/20220722091644.2937953-1-williamsukatube@1... Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Jialin Zhang zhangjialin11@huawei.com --- drivers/mtd/devices/docg3.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/mtd/devices/docg3.c b/drivers/mtd/devices/docg3.c index a030792115bc..fa42473d04c1 100644 --- a/drivers/mtd/devices/docg3.c +++ b/drivers/mtd/devices/docg3.c @@ -1975,9 +1975,14 @@ static int __init docg3_probe(struct platform_device *pdev) dev_err(dev, "No I/O memory resource defined\n"); return ret; } - base = devm_ioremap(dev, ress->start, DOC_IOSPACE_SIZE);
ret = -ENOMEM; + base = devm_ioremap(dev, ress->start, DOC_IOSPACE_SIZE); + if (!base) { + dev_err(dev, "devm_ioremap dev failed\n"); + return ret; + } + cascade = devm_kcalloc(dev, DOC_MAX_NBFLOORS, sizeof(*cascade), GFP_KERNEL); if (!cascade)