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| author | Florian Fainelli <f.fainelli@gmail.com> | 2017-10-12 00:59:22 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-11-02 11:54:46 +0300 |
| commit | c39d070d9d8ce7d6390c10a45695a3c208391e01 (patch) | |
| tree | 6788d947bee880f9afc05fd96491a6d83583b347 | |
| parent | ccecf863c130fbeaffa2657e4ac56e7f64aa4097 (diff) | |
| download | linux-c39d070d9d8ce7d6390c10a45695a3c208391e01.tar.xz | |
spi: bcm-qspi: Fix use after free in bcm_qspi_probe() in error path
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@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/spi/spi-bcm-qspi.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/drivers/spi/spi-bcm-qspi.c b/drivers/spi/spi-bcm-qspi.c index b19722ba908c..31eb882ed62d 100644 --- a/drivers/spi/spi-bcm-qspi.c +++ b/drivers/spi/spi-bcm-qspi.c @@ -1278,7 +1278,7 @@ int bcm_qspi_probe(struct platform_device *pdev, goto qspi_probe_err; } } else { - goto qspi_probe_err; + goto qspi_resource_err; } res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "bspi"); @@ -1300,7 +1300,7 @@ int bcm_qspi_probe(struct platform_device *pdev, 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; } } @@ -1308,7 +1308,7 @@ int bcm_qspi_probe(struct platform_device *pdev, GFP_KERNEL); if (!qspi->dev_ids) { ret = -ENOMEM; - goto qspi_probe_err; + goto qspi_resource_err; } for (val = 0; val < num_irqs; val++) { @@ -1397,8 +1397,9 @@ 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 */ |