CVE-2024-47705

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> block: fix potential invalid pointer dereference in blk_add_partition<br /> <br /> The blk_add_partition() function initially used a single if-condition<br /> (IS_ERR(part)) to check for errors when adding a partition. This was<br /> modified to handle the specific case of -ENXIO separately, allowing the<br /> function to proceed without logging the error in this case. However,<br /> this change unintentionally left a path where md_autodetect_dev()<br /> could be called without confirming that part is a valid pointer.<br /> <br /> This commit separates the error handling logic by splitting the<br /> initial if-condition, improving code readability and handling specific<br /> error scenarios explicitly. The function now distinguishes the general<br /> error case from -ENXIO without altering the existing behavior of<br /> md_autodetect_dev() calls.