Description
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: initialize SDIO data work before cleanup brcmf_sdio_probe() stores the newly allocated bus in sdiodev->bus before allocating the ordered workqueue. If that allocation fails, the function jumps to fail and calls brcmf_sdio_remove(). brcmf_sdio_remove() unconditionally cancels bus->datawork. Initialize the work item before the first failure path that can reach brcmf_sdio_remove(), so the cleanup path always observes a valid work object. This issue was found by our static analysis tool and then confirmed by manual review of the probe error path and the remove-time work drain. The problem pattern is an early setup failure that reaches a cleanup helper which cancels an embedded work item before its initializer has run. A QEMU PoC forced alloc_ordered_workqueue() to fail at the same point in brcmf_sdio_probe(), before INIT_WORK(&bus->datawork) is reached. The resulting fail path calls brcmf_sdio_remove(), and DEBUG_OBJECTS reports the invalid work drain with brcmf_sdio_probe() and brcmf_sdio_remove() in the stack.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
9982464379e81ece51ced03ebecbbcd34ea367a6 to < 860887d22890417d43ef8298f0cc4865e29b54deaffected9982464379e81ece51ced03ebecbbcd34ea367a6 to < 9a4be91e5bb032b34cb3c962f6d4f82e7ef09364affected9982464379e81ece51ced03ebecbbcd34ea367a6 to < fb12c87ae855346321af72e57a93c146205f1090affected9982464379e81ece51ced03ebecbbcd34ea367a6 to < f50a2b9e57a751e70ae9a272875d80d39eaccd6aaffected9982464379e81ece51ced03ebecbbcd34ea367a6 to < 6bd21ec8549a5854dd64204a66289952917a924caffected9982464379e81ece51ced03ebecbbcd34ea367a6 to < 5c342437ea44bb829680ca9e4f683dd5b325b219affected9982464379e81ece51ced03ebecbbcd34ea367a6 to < c73c3fc1c7ca5a927639f0884624cb244ba791e4affected9982464379e81ece51ced03ebecbbcd34ea367a6 to < 2a665946e0407a05a3f81bd56a08553c446498e0affected
Linux Linux
Default version status: affected
4.1affected0 to < 4.1unaffected5.10.265 to ≤ 5.10.*unaffected5.15.216 to ≤ 5.15.*unaffected6.1.183 to ≤ 6.1.*unaffected6.6.148 to ≤ 6.6.*unaffected6.12.101 to ≤ 6.12.*unaffected6.18.42 to ≤ 6.18.*unaffected7.1.6 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/860887d22890417d43ef8298f0cc4865e29b54de ↗
- https://git.kernel.org/stable/c/9a4be91e5bb032b34cb3c962f6d4f82e7ef09364 ↗
- https://git.kernel.org/stable/c/fb12c87ae855346321af72e57a93c146205f1090 ↗
- https://git.kernel.org/stable/c/f50a2b9e57a751e70ae9a272875d80d39eaccd6a ↗
- https://git.kernel.org/stable/c/6bd21ec8549a5854dd64204a66289952917a924c ↗
- https://git.kernel.org/stable/c/5c342437ea44bb829680ca9e4f683dd5b325b219 ↗
- https://git.kernel.org/stable/c/c73c3fc1c7ca5a927639f0884624cb244ba791e4 ↗
- https://git.kernel.org/stable/c/2a665946e0407a05a3f81bd56a08553c446498e0 ↗