Description
In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Fix double free in idxd_setup_wqs() The clean up in idxd_setup_wqs() has had a couple bugs because the error handling is a bit subtle. It's simpler to just re-write it in a cleaner way. The issues here are: 1) If "idxd->max_wqs" is <= 0 then we call put_device(conf_dev) when "conf_dev" hasn't been initialized. 2) If kzalloc_node() fails then again "conf_dev" is invalid. It's either uninitialized or it points to the "conf_dev" from the previous iteration so it leads to a double free. It's better to free partial loop iterations within the loop and then the unwinding at the end can handle whole loop iterations. I also renamed the labels to describe what the goto does and not where the goto was located.
Product status
d584acdf54f409cb7eae1359ae6c12aaabedeed8 (git) before 25e6146c2812487a88f619d5ff6efbdcd5b2bc31
47846211998a9ffb0fcc08092eb95ac783d2b11a (git) before df82c7901513fd0fc738052a8e6a330d92cc8ec9
5fcd392dae6d6aba7dc64ffdbb838ff191315da3 (git) before ec5430d090d0b6ace8fefa290fc37e88930017d2
3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4 (git) before 9f0e225635475b2285b966271d5e82cba74295b1
3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4 (git) before 39aaa337449e71a41d4813be0226a722827ba606
ed2c66000aa64c0d2621864831f0d04c820a1441 (git)
6.15
Any version before 6.15
6.1.153 (semver)
6.6.107 (semver)
6.12.48 (semver)
6.16.8 (semver)
6.17 (original_commit_for_fix)
References
lists.debian.org/debian-lts-announce/2025/10/msg00008.html
git.kernel.org/...c/25e6146c2812487a88f619d5ff6efbdcd5b2bc31
git.kernel.org/...c/df82c7901513fd0fc738052a8e6a330d92cc8ec9
git.kernel.org/...c/ec5430d090d0b6ace8fefa290fc37e88930017d2
git.kernel.org/...c/9f0e225635475b2285b966271d5e82cba74295b1
git.kernel.org/...c/39aaa337449e71a41d4813be0226a722827ba606
