Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d584acdf54f409cb7eae1359ae6c12aaabedeed8 before 25e6146c2812487a88f619d5ff6efbdcd5b2bc31; affected 47846211998a9ffb0fcc08092eb95ac783d2b11a before df82c7901513fd0fc738052a8e6a330d92cc8ec9; affected 5fcd392dae6d6aba7dc64ffdbb838ff191315da3 before ec5430d090d0b6ace8fefa290fc37e88930017d2; affected 3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4 before 9f0e225635475b2285b966271d5e82cba74295b1; affected 3fd2f4bc010cdfbc07dd21018dc65bd9370eb7a4 before 39aaa337449e71a41d4813be0226a722827ba606; affected ed2c66000aa64c0d2621864831f0d04c820a1441; affected 6.1.140 before 6.1.153; affected 6.6.92 before 6.6.107; affected 6.12.30 before 6.12.48; affected 6.14.8 before 6.15 |
| Linux / Linux | affected 6.15; unaffected 0 before 6.15; unaffected 6.1.153 through 6.1.*; unaffected 6.6.107 through 6.6.*; unaffected 6.12.48 through 6.12.*; unaffected 6.16.8 through 6.16.*; unaffected 6.17 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/25e6146c2812487a88f619d5ff6efbdcd5b2bc31
- https://git.kernel.org/stable/c/df82c7901513fd0fc738052a8e6a330d92cc8ec9
- https://git.kernel.org/stable/c/ec5430d090d0b6ace8fefa290fc37e88930017d2
- https://git.kernel.org/stable/c/9f0e225635475b2285b966271d5e82cba74295b1
- https://git.kernel.org/stable/c/39aaa337449e71a41d4813be0226a722827ba606
ADP enrichment
No English description supplied.