From: guoqi0226 <guoqi0226@163.com>
[ Upstream commit f1b061b4d4c6cbf861319ba954caa80145cf018f ]
Prevent NULL pointer dereference when spi_get_device_id() returns NULL,
which can happen when using driver_override without matching SPI ID entry.
Signed-off-by: guoqi0226 <guoqi0226@163.com>
Link: https://patch.msgid.link/20260616103018.105612-3-guoqi0226@163.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
LLM Generated explanations, may be completely bogus:
The author search finished: there are no commits by `guoqi0226` in this
v6.18.44 checkout, so the SPI NULL-check patch isn’t in the tree yet.
That doesn’t change the earlier conclusion — the buggy code is still
present in `drivers/spi/spi.c`, and the fix is a small, low-risk
backport candidate.
**YES**
drivers/spi/spi.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 6ea9ac2931cde..abb9e873e3f9f 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -358,12 +358,16 @@ EXPORT_SYMBOL_GPL(spi_get_device_id);
const void *spi_get_device_match_data(const struct spi_device *sdev)
{
const void *match;
+ const struct spi_device_id *id;
match = device_get_match_data(&sdev->dev);
if (match)
return match;
- return (const void *)spi_get_device_id(sdev)->driver_data;
+ id = spi_get_device_id(sdev);
+ if (!id)
+ return NULL;
+ return (const void *)id->driver_data;
}
EXPORT_SYMBOL_GPL(spi_get_device_match_data);
--
2.53.0