diff options
| author | Tudor Ambarus <tudor.ambarus@linaro.org> | 2024-02-07 12:04:19 +0000 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2024-02-08 16:33:29 +0000 |
| commit | a336d41bbea51e11e3e4f56bd3877a535c077129 (patch) | |
| tree | 61ae9810d82613dd7c0e24cc213714cf49e26d4d /drivers/spi | |
| parent | 7256d6bdd4fe0eac6d4bcd138c3d87f95f79c750 (diff) | |
| download | linux-a336d41bbea51e11e3e4f56bd3877a535c077129.tar.gz | |
spi: s3c64xx: avoid possible negative array index
The platform id is used as an index into the fifo_lvl_mask array.
Platforms can come with a negative device ID, PLATFORM_DEVID_NONE (-1),
thus we risked a negative array index. Catch such cases and fail to
probe.
Reviewed-by: Sam Protsenko <semen.protsenko@linaro.org>
Reviewed-by: Peter Griffin <peter.griffin@linaro.org>
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Link: https://lore.kernel.org/r/20240207120431.2766269-6-tudor.ambarus@linaro.org
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'drivers/spi')
| -rw-r--r-- | drivers/spi/spi-s3c64xx.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/spi/spi-s3c64xx.c b/drivers/spi/spi-s3c64xx.c index f6048345022d6..87b7203f9b1f1 100644 --- a/drivers/spi/spi-s3c64xx.c +++ b/drivers/spi/spi-s3c64xx.c @@ -1189,6 +1189,9 @@ static int s3c64xx_spi_probe(struct platform_device *pdev) "Failed to get alias id\n"); sdd->port_id = ret; } else { + if (pdev->id < 0) + return dev_err_probe(&pdev->dev, -EINVAL, + "Negative platform ID is not allowed\n"); sdd->port_id = pdev->id; } |