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interconnect: debugfs: initialize src_node and dst_node to empty strings

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[ Upstream commit 8cc27f5c6d ]

The debugfs_create_str() API assumes that the string pointer is either NULL
or points to valid kmalloc() memory. Leaving the pointer uninitialized can
cause problems.

Initialize src_node and dst_node to empty strings before creating the
debugfs entries to guarantee that reads and writes are safe.

Fixes: 770c69f037 ("interconnect: Add debugfs test client")
Signed-off-by: Georgi Djakov <djakov@kernel.org>
Reviewed-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Tested-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Link: https://lore.kernel.org/r/20260109122523.125843-1-djakov@kernel.org
Signed-off-by: Georgi Djakov <djakov@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Georgi Djakov
2026-01-30 10:32:16 +01:00
committed by Greg Kroah-Hartman
parent bcb9803aa1
commit 5d7c7e1fb3
1 changed files with 5 additions and 0 deletions
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drivers/interconnect/debugfs-client.c
+5
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@@ -150,6 +150,11 @@ int icc_debugfs_client_init(struct dentry *icc_dir)
return ret;
}
src_node = devm_kstrdup(&pdev->dev, "", GFP_KERNEL);
dst_node = devm_kstrdup(&pdev->dev, "", GFP_KERNEL);
if (!src_node || !dst_node)
return -ENOMEM;
client_dir = debugfs_create_dir("test_client", icc_dir);
debugfs_create_str("src_node", 0600, client_dir, &src_node);