Messages in this thread Patch in this message | | | From | Andy Shevchenko <> | Subject | [resend, PATCH v1 1/2] parport: Clean up resources correctly when parport_register_port() fails | Date | Wed, 18 Oct 2023 17:59:47 +0300 |
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The smatch warns about uncleaned resources in case the parport_register_port() fails:
parport_register_port() warn: '&tmp->full_list' not removed from list
This is indeed an issue introduced when converting code to use kasprintf(). However, the whole kasprintf() dance in this case is not needed as dev_set_name() can handle the formatted input and produces the same result. So, the solution is to delegate name forming to the dev_set_name() and make device_register() error path to deal with error handling (via put_device() call).
Fixes: 8d8ae17eb0de ("parport: Use kasprintf() instead of fixed buffer formatting") Reported-by: kernel test robot <lkp@intel.com> Reported-by: Dan Carpenter <dan.carpenter@linaro.org> Closes: https://lore.kernel.org/r/202310180809.hepZB9k6-lkp@intel.com/ Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- drivers/parport/share.c | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-)
diff --git a/drivers/parport/share.c b/drivers/parport/share.c index a9a9cb0477ea..048a459ce4b0 100644 --- a/drivers/parport/share.c +++ b/drivers/parport/share.c @@ -361,7 +361,6 @@ static void free_port(struct device *dev) kfree(port->probe_info[d].description); } - kfree(port->name); kfree(port); } @@ -479,16 +478,13 @@ struct parport *parport_register_port(unsigned long base, int irq, int dma, /* * Now that the portnum is known finish doing the Init. */ - tmp->name = kasprintf(GFP_KERNEL, "parport%d", tmp->portnum); - if (!tmp->name) { - kfree(tmp); - return NULL; - } - dev_set_name(&tmp->bus_dev, tmp->name); + dev_set_name(&tmp->bus_dev, "parport%d", tmp->portnum); tmp->bus_dev.bus = &parport_bus_type; tmp->bus_dev.release = free_port; tmp->bus_dev.type = &parport_device_type; + tmp->name = dev_name(&tmp->bus_dev); + for (device = 0; device < 5; device++) /* assume the worst */ tmp->probe_info[device].class = PARPORT_CLASS_LEGACY; -- 2.40.0.1.gaa8946217a0b
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