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Message-Id: <20221019083315.296999903@linuxfoundation.org>
Date: Wed, 19 Oct 2022 10:31:00 +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, Jiasheng Jiang <jiasheng@...as.ac.cn>,
Eddie James <eajames@...ux.ibm.com>,
Joel Stanley <joel@....id.au>, Sasha Levin <sashal@...nel.org>
Subject: [PATCH 6.0 573/862] fsi: core: Check error number after calling ida_simple_get
From: Jiasheng Jiang <jiasheng@...as.ac.cn>
[ Upstream commit 35af9fb49bc5c6d61ef70b501c3a56fe161cce3e ]
If allocation fails, the ida_simple_get() will return error number.
So master->idx could be error number and be used in dev_set_name().
Therefore, it should be better to check it and return error if fails,
like the ida_simple_get() in __fsi_get_new_minor().
Fixes: 09aecfab93b8 ("drivers/fsi: Add fsi master definition")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
Reviewed-by: Eddie James <eajames@...ux.ibm.com>
Link: https://lore.kernel.org/r/20220111073411.614138-1-jiasheng@iscas.ac.cn
Signed-off-by: Joel Stanley <joel@....id.au>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/fsi/fsi-core.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/fsi/fsi-core.c b/drivers/fsi/fsi-core.c
index 3a7b78e36701..5858e6339a10 100644
--- a/drivers/fsi/fsi-core.c
+++ b/drivers/fsi/fsi-core.c
@@ -1314,6 +1314,9 @@ int fsi_master_register(struct fsi_master *master)
mutex_init(&master->scan_lock);
master->idx = ida_simple_get(&master_ida, 0, INT_MAX, GFP_KERNEL);
+ if (master->idx < 0)
+ return master->idx;
+
dev_set_name(&master->dev, "fsi%d", master->idx);
master->dev.class = &fsi_master_class;
--
2.35.1
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