Bail out early, otherwise we follow a null pointer.
Signed-off-by: Sean Young <[email protected]>
---
drivers/media/rc/lirc_dev.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/media/rc/lirc_dev.c b/drivers/media/rc/lirc_dev.c
index 0030ce0..a54ca53 100644
--- a/drivers/media/rc/lirc_dev.c
+++ b/drivers/media/rc/lirc_dev.c
@@ -647,6 +647,9 @@ ssize_t lirc_dev_fop_read(struct file *file,
return -ENODEV;
}
+ if (!LIRC_CAN_REC(ir->d.features))
+ return -EINVAL;
+
dev_dbg(ir->d.dev, LOGHEAD "read called\n", ir->d.name, ir->d.minor);
buf = kzalloc(ir->chunk_size, GFP_KERNEL);
--
2.9.3
--
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