Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_hid: move list and spinlock inits from bind to alloc There was an issue when you did the following: - setup and bind an hid gadget - open /dev/hidg0 - use the resulting fd in EPOLL_CTL_ADD - unbind the UDC - bind the UDC - use the fd in EPOLL_CTL_DEL When CONFIG_DEBUG_LIST was enabled, a list_del corruption was reported within remove_wait_queue (via ep_remove_wait_queue). After some debugging I found out that the queues, which f_hid registers via poll_wait were the problem. These were initialized using init_waitqueue_head inside hidg_bind. So effectively, the bind function re-initialized the queues while there were still items in them. The solution is to move the initialization from hidg_bind to hidg_alloc to extend their lifetimes to the lifetime of the function instance. Additionally, I found many other possibly problematic init calls in the bind function, which I moved as well.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected cb382536052fcc7713988869b54a81137069e5a9 before 13440c0db227c5db01da751ed966dde4cdd2ea18; affected cb382536052fcc7713988869b54a81137069e5a9 before de93e0862169b5539e00c2b9980b93fd80c37c0d; affected cb382536052fcc7713988869b54a81137069e5a9 before 81aee4500055876883658b024b6fb61801afe134; affected cb382536052fcc7713988869b54a81137069e5a9 before 8ec6a58586f195a88479edcdb0b8027c39f12d03; affected cb382536052fcc7713988869b54a81137069e5a9 before f7d00ee1c8082c8a134340aaf16d71a27e29c362; affected cb382536052fcc7713988869b54a81137069e5a9 before 5d1bb391ceeebb28327703dd07af8c6324af298f; affected cb382536052fcc7713988869b54a81137069e5a9 before 26a879a41ed960b3fb4ec773ef2788c515c0e488; affected cb382536052fcc7713988869b54a81137069e5a9 before 4e0a88254ad59f6c53a34bf5fa241884ec09e8b2 |
| Linux / Linux | affected 3.19; unaffected 0 before 3.19; unaffected 5.10.253 through 5.10.*; unaffected 5.15.203 through 5.15.*; unaffected 6.1.169 through 6.1.*; unaffected 6.6.135 through 6.6.*; unaffected 6.12.81 through 6.12.*; unaffected 6.18.22 through 6.18.*; unaffected 6.19.12 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/13440c0db227c5db01da751ed966dde4cdd2ea18
- https://git.kernel.org/stable/c/de93e0862169b5539e00c2b9980b93fd80c37c0d
- https://git.kernel.org/stable/c/81aee4500055876883658b024b6fb61801afe134
- https://git.kernel.org/stable/c/8ec6a58586f195a88479edcdb0b8027c39f12d03
- https://git.kernel.org/stable/c/f7d00ee1c8082c8a134340aaf16d71a27e29c362
- https://git.kernel.org/stable/c/5d1bb391ceeebb28327703dd07af8c6324af298f
- https://git.kernel.org/stable/c/26a879a41ed960b3fb4ec773ef2788c515c0e488
- https://git.kernel.org/stable/c/4e0a88254ad59f6c53a34bf5fa241884ec09e8b2