4.9-stable review patch. If anyone has any objections, please let me know.
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From: Rob Herring robh@kernel.org
[ Upstream commit bcf54d5385abaea9c8026aae6f4eeb348671a52d ]
If the length of the modalias is greater than the buffer size, then the modalias is truncated. However the untruncated length is returned which will cause an error. Fix this to return the truncated length. If an error in the case was desired, then then we should just return -ENOMEM.
The reality is no device will ever have 4KB of compatible strings to hit this case.
Signed-off-by: Rob Herring robh@kernel.org Cc: Frank Rowand frowand.list@gmail.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/of/device.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -223,7 +223,7 @@ ssize_t of_device_get_modalias(struct de str[i] = '_'; }
- return tsize; + return repend; } EXPORT_SYMBOL_GPL(of_device_get_modalias);