Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 18f9e9d150fccfa747875df6f0a9f606740762b3 before 3cddde484471c602bea04e6f384819d336a1ff84; affected 18f9e9d150fccfa747875df6f0a9f606740762b3 before d7673ac466eca37ec3e6b7cc9ccdb06de3304e9b; affected 18f9e9d150fccfa747875df6f0a9f606740762b3 before 7c37920c96b85ef4255a7acc795e99e63dd38d59; affected 18f9e9d150fccfa747875df6f0a9f606740762b3 before 1047ca2d816994f31e1475e63e0c0b7825599747; affected 18f9e9d150fccfa747875df6f0a9f606740762b3 before 97c18f074ff1c12d016a0753072a3afdfa0b9611; affected 18f9e9d150fccfa747875df6f0a9f606740762b3 before bea1d373098b22d7142da48750ce5526096425bc; affected 18f9e9d150fccfa747875df6f0a9f606740762b3 before f3015627b6e9ddf85cfeaf42405b3c194dde2c36; affected 18f9e9d150fccfa747875df6f0a9f606740762b3 before a5338e365c4559d7b4d7356116b0eb95b12e08d5 |
| Linux / Linux | affected 5.0; unaffected 0 before 5.0; unaffected 5.10.252 through 5.10.*; unaffected 5.15.202 through 5.15.*; unaffected 6.1.165 through 6.1.*; unaffected 6.6.128 through 6.6.*; unaffected 6.12.75 through 6.12.*; unaffected 6.18.16 through 6.18.*; unaffected 6.19.6 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
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
ADP enrichment
No English description supplied.