Description
In the Linux kernel, the following vulnerability has been resolved: PCI/IOV: Fix race between SR-IOV enable/disable and hotplug Commit 05703271c3cd ("PCI/IOV: Add PCI rescan-remove locking when enabling/disabling SR-IOV") tried to fix a race between the VF removal inside sriov_del_vfs() and concurrent hot unplug by taking the PCI rescan/remove lock in sriov_del_vfs(). Similarly the PCI rescan/remove lock was also taken in sriov_add_vfs() to protect addition of VFs. This approach however causes deadlock on trying to remove PFs with SR-IOV enabled because PFs disable SR-IOV during removal and this removal happens under the PCI rescan/remove lock. So the original fix had to be reverted. Instead of taking the PCI rescan/remove lock in sriov_add_vfs() and sriov_del_vfs(), fix the race that occurs with SR-IOV enable and disable vs hotplug higher up in the callchain by taking the lock in sriov_numvfs_store() before calling into the driver's sriov_configure() callback.
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
18f9e9d150fccfa747875df6f0a9f606740762b3 to < 3cddde484471c602bea04e6f384819d336a1ff84affected18f9e9d150fccfa747875df6f0a9f606740762b3 to < d7673ac466eca37ec3e6b7cc9ccdb06de3304e9baffected18f9e9d150fccfa747875df6f0a9f606740762b3 to < 7c37920c96b85ef4255a7acc795e99e63dd38d59affected18f9e9d150fccfa747875df6f0a9f606740762b3 to < 1047ca2d816994f31e1475e63e0c0b7825599747affected18f9e9d150fccfa747875df6f0a9f606740762b3 to < 97c18f074ff1c12d016a0753072a3afdfa0b9611affected18f9e9d150fccfa747875df6f0a9f606740762b3 to < bea1d373098b22d7142da48750ce5526096425bcaffected18f9e9d150fccfa747875df6f0a9f606740762b3 to < f3015627b6e9ddf85cfeaf42405b3c194dde2c36affected18f9e9d150fccfa747875df6f0a9f606740762b3 to < a5338e365c4559d7b4d7356116b0eb95b12e08d5affected
Linux Linux
Default version status: affected
5.0affected0 to < 5.0unaffected5.10.252 to ≤ 5.10.*unaffected5.15.202 to ≤ 5.15.*unaffected6.1.165 to ≤ 6.1.*unaffected6.6.128 to ≤ 6.6.*unaffected6.12.75 to ≤ 6.12.*unaffected6.18.16 to ≤ 6.18.*unaffected6.19.6 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/3cddde484471c602bea04e6f384819d336a1ff84 ↗
- https://git.kernel.org/stable/c/d7673ac466eca37ec3e6b7cc9ccdb06de3304e9b ↗
- https://git.kernel.org/stable/c/7c37920c96b85ef4255a7acc795e99e63dd38d59 ↗
- https://git.kernel.org/stable/c/1047ca2d816994f31e1475e63e0c0b7825599747 ↗
- https://git.kernel.org/stable/c/97c18f074ff1c12d016a0753072a3afdfa0b9611 ↗
- https://git.kernel.org/stable/c/bea1d373098b22d7142da48750ce5526096425bc ↗
- https://git.kernel.org/stable/c/f3015627b6e9ddf85cfeaf42405b3c194dde2c36 ↗
- https://git.kernel.org/stable/c/a5338e365c4559d7b4d7356116b0eb95b12e08d5 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html ↗