Description
In the Linux kernel, the following vulnerability has been resolved: nfc: nci: fix circular locking dependency in nci_close_device nci_close_device() flushes rx_wq and tx_wq while holding req_lock. This causes a circular locking dependency because nci_rx_work() running on rx_wq can end up taking req_lock too: nci_rx_work -> nci_rx_data_packet -> nci_data_exchange_complete -> __sk_destruct -> rawsock_destruct -> nfc_deactivate_target -> nci_deactivate_target -> nci_request -> mutex_lock(&ndev->req_lock) Move the flush of rx_wq after req_lock has been released. This should safe (I think) because NCI_UP has already been cleared and the transport is closed, so the work will see it and return -ENETDOWN. NIPA has been hitting this running the nci selftest with a debug kernel on roughly 4% of the runs.
Product status
6a2968aaf50c7a22fced77a5e24aa636281efca8 (git) before 7ed00a3edc8597fe2333f524401e2889aa1b5edf
6a2968aaf50c7a22fced77a5e24aa636281efca8 (git) before 5eef9ebec7f5738f12cadede3545c05b34bf5ac3
6a2968aaf50c7a22fced77a5e24aa636281efca8 (git) before ca54e904a071aa65ef3ad46ba42d51aaac6b73b4
6a2968aaf50c7a22fced77a5e24aa636281efca8 (git) before eb435d150ca74b4d40f77f1a2266f3636ed64a79
6a2968aaf50c7a22fced77a5e24aa636281efca8 (git) before 1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289
6a2968aaf50c7a22fced77a5e24aa636281efca8 (git) before d89b74bf08f067b55c03d7f999ba0a0e73177eb3
6a2968aaf50c7a22fced77a5e24aa636281efca8 (git) before 09143c0e8f3b03517e6233aad42f45c794d8df8e
6a2968aaf50c7a22fced77a5e24aa636281efca8 (git) before 4527025d440ce84bf56e75ce1df2e84cb8178616
3.2
Any version before 3.2
5.10.253 (semver)
5.15.203 (semver)
6.1.168 (semver)
6.6.131 (semver)
6.12.80 (semver)
6.18.21 (semver)
6.19.11 (semver)
7.0 (original_commit_for_fix)
References
git.kernel.org/...c/7ed00a3edc8597fe2333f524401e2889aa1b5edf
git.kernel.org/...c/5eef9ebec7f5738f12cadede3545c05b34bf5ac3
git.kernel.org/...c/ca54e904a071aa65ef3ad46ba42d51aaac6b73b4
git.kernel.org/...c/eb435d150ca74b4d40f77f1a2266f3636ed64a79
git.kernel.org/...c/1edc12d2bbcb7a8d0f1088e6fccb9d8c01bb1289
git.kernel.org/...c/d89b74bf08f067b55c03d7f999ba0a0e73177eb3
git.kernel.org/...c/09143c0e8f3b03517e6233aad42f45c794d8df8e
git.kernel.org/...c/4527025d440ce84bf56e75ce1df2e84cb8178616