Hello Haneen Mohammed,
The patch 2c9356d115c9: "Staging: media: replace pr_* with dev_*"
from Mar 18, 2015, leads to the following static checker warning:
drivers/staging/media/lirc/lirc_sasem.c:176 delete_context()
error: dereferencing freed memory 'context'
drivers/staging/media/lirc/lirc_sasem.c
166 static void delete_context(struct sasem_context *context)
167 {
168 usb_free_urb(context->tx_urb); /* VFD */
169 usb_free_urb(context->rx_urb); /* IR */
170 lirc_buffer_free(context->driver->rbuf);
171 kfree(context->driver->rbuf);
172 kfree(context->driver);
173 kfree(context);
^^^^^^^
Free.
174
175 if (debug)
176 dev_info(&context->dev->dev, "%s: context deleted\n",
^^^^^^^^^^^^^^^^^
Use after free. We could go back to pr_info(), or move this in front of
the free or probably the best option is just to delete the printk. It
doesn't look very useful.
177 __func__);
178 }
regards,
dan carpenter
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