4.9-stable review patch. If anyone has any objections, please let me know.
------------------
From: Florian Fainelli <f.fainelli@xxxxxxxxx>
commit c0368e4db4a3e8a3dce40f3f621c06e14c560d79 upstream.
There was an inversion in how the error path in bcm_qspi_probe() is done
which would make us trip over a KASAN use-after-free report. Turns out
that qspi->dev_ids does not get allocated until later in the probe
process. Fix this by introducing a new lable: qspi_resource_err which
takes care of cleaning up the SPI master instance.
Fixes: fa236a7ef240 ("spi: bcm-qspi: Add Broadcom MSPI driver")
Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
Signed-off-by: Mark Brown <broonie@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/spi/spi-bcm-qspi.c | 9 +++++----
1 file changed, 5 insertions(+), 4 deletions(-)
--- a/drivers/spi/spi-bcm-qspi.c
+++ b/drivers/spi/spi-bcm-qspi.c
@@ -1215,7 +1215,7 @@ int bcm_qspi_probe(struct platform_devic
goto qspi_probe_err;
}
} else {
- goto qspi_probe_err;
+ goto qspi_resource_err;
}
res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "bspi");
@@ -1237,7 +1237,7 @@ int bcm_qspi_probe(struct platform_devic
qspi->base[CHIP_SELECT] = devm_ioremap_resource(dev, res);
if (IS_ERR(qspi->base[CHIP_SELECT])) {
ret = PTR_ERR(qspi->base[CHIP_SELECT]);
- goto qspi_probe_err;
+ goto qspi_resource_err;
}
}
@@ -1245,7 +1245,7 @@ int bcm_qspi_probe(struct platform_devic
GFP_KERNEL);
if (!qspi->dev_ids) {
ret = -ENOMEM;
- goto qspi_probe_err;
+ goto qspi_resource_err;
}
for (val = 0; val < num_irqs; val++) {
@@ -1334,8 +1334,9 @@ qspi_reg_err:
bcm_qspi_hw_uninit(qspi);
clk_disable_unprepare(qspi->clk);
qspi_probe_err:
- spi_master_put(master);
kfree(qspi->dev_ids);
+qspi_resource_err:
+ spi_master_put(master);
return ret;
}
/* probe function to be called by SoC specific platform driver probe */