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[media] em28xx: input: fix oops on device removal
When em28xx_ir_init() fails due to an configuration error, it frees the memory of struct em28xx_IR *ir, but doesn't set the corresponding pointer in the device struct to NULL. On device removal, em28xx_ir_fini() gets called, which then calls rc_unregister_device() with a pointer to freed memory. Fixes bug 26572 (http://bugzilla.kernel.org/show_bug.cgi?id=26572) Signed-off-by: Frank Schäfer <fschaefer.oss@googlemail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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0dae883923
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@ -600,7 +600,7 @@ static int em28xx_ir_init(struct em28xx *dev)
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ir = kzalloc(sizeof(*ir), GFP_KERNEL);
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ir = kzalloc(sizeof(*ir), GFP_KERNEL);
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rc = rc_allocate_device();
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rc = rc_allocate_device();
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if (!ir || !rc)
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if (!ir || !rc)
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goto err_out_free;
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goto error;
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/* record handles to ourself */
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/* record handles to ourself */
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ir->dev = dev;
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ir->dev = dev;
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@ -629,14 +629,14 @@ static int em28xx_ir_init(struct em28xx *dev)
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break;
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break;
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default:
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default:
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err = -ENODEV;
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err = -ENODEV;
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goto err_out_free;
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goto error;
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}
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}
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/* By default, keep protocol field untouched */
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/* By default, keep protocol field untouched */
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rc_type = RC_BIT_UNKNOWN;
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rc_type = RC_BIT_UNKNOWN;
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err = em28xx_ir_change_protocol(rc, &rc_type);
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err = em28xx_ir_change_protocol(rc, &rc_type);
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if (err)
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if (err)
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goto err_out_free;
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goto error;
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/* This is how often we ask the chip for IR information */
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/* This is how often we ask the chip for IR information */
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ir->polling = 100; /* ms */
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ir->polling = 100; /* ms */
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@ -661,7 +661,7 @@ static int em28xx_ir_init(struct em28xx *dev)
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/* all done */
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/* all done */
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err = rc_register_device(rc);
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err = rc_register_device(rc);
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if (err)
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if (err)
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goto err_out_stop;
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goto error;
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em28xx_register_i2c_ir(dev);
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em28xx_register_i2c_ir(dev);
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@ -674,9 +674,8 @@ static int em28xx_ir_init(struct em28xx *dev)
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return 0;
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return 0;
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err_out_stop:
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error:
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dev->ir = NULL;
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dev->ir = NULL;
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err_out_free:
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rc_free_device(rc);
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rc_free_device(rc);
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kfree(ir);
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kfree(ir);
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return err;
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return err;
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