CVE-2022-49167

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> btrfs: do not double complete bio on errors during compressed reads<br /> <br /> I hit some weird panics while fixing up the error handling from<br /> btrfs_lookup_bio_sums(). Turns out the compression path will complete<br /> the bio we use if we set up any of the compression bios and then return<br /> an error, and then btrfs_submit_data_bio() will also call bio_endio() on<br /> the bio.<br /> <br /> Fix this by making btrfs_submit_compressed_read() responsible for<br /> calling bio_endio() on the bio if there are any errors. Currently it<br /> was only doing it if we created the compression bios, otherwise it was<br /> depending on btrfs_submit_data_bio() to do the right thing. This<br /> creates the above problem, so fix up btrfs_submit_compressed_read() to<br /> always call bio_endio() in case of an error, and then simply return from<br /> btrfs_submit_data_bio() if we had to call<br /> btrfs_submit_compressed_read().