CVE-2024-47705
block: fix potential invalid pointer dereference in blk_add_partition
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block: fix potential invalid pointer dereference in blk_add_partition
In the Linux kernel, the following vulnerability has been resolved: block: fix potential invalid pointer dereference in blk_add_partition The blk_add_partition() function initially used a single if-condition (IS_ERR(part)) to check for errors when adding a partition. This was modified to handle the specific case of -ENXIO separately, allowing the function to proceed without logging the error in this case. However, this change unintentionally left a path where md_autodetect_dev() could be called without confirming that part is a valid pointer. This commit separates the error handling logic by splitting the initial if-condition, improving code readability and handling specific error scenarios explicitly. The function now distinguishes the general error case from -ENXIO without altering the existing behavior of md_autodetect_dev() calls.
Reserved 2024-09-30 | Published 2024-10-21 | Updated 2025-05-04 | Assigner Linuxgit.kernel.org/...c/4bc4272e2506941c3f3d4fb8b0c659ee814dcf6f
git.kernel.org/...c/cc4d21d9492db4e534d3e01253cf885c90dd2a8b
git.kernel.org/...c/64cf2a39202ca2d9df5ee70eb310b6141ce2b8ed
git.kernel.org/...c/80f5bfbb80ea1615290dbc24f49d3d8c86db58fe
git.kernel.org/...c/652039ba477c9a4ab43740cf2cb0d068d53508c2
git.kernel.org/...c/afe53ea9b378c376101d99d216f13b6256f75189
git.kernel.org/...c/26e197b7f9240a4ac301dd0ad520c0c697c2ea7d
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