| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-26587: net: netdevsim: don't try to destroy PHC on VFs |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: netdevsim: don't try to destroy PHC on VFs |
| |
| PHC gets initialized in nsim_init_netdevsim(), which |
| is only called if (nsim_dev_port_is_pf()). |
| |
| Create a counterpart of nsim_init_netdevsim() and |
| move the mock_phc_destroy() there. |
| |
| This fixes a crash trying to destroy netdevsim with |
| VFs instantiated, as caught by running the devlink.sh test: |
| |
| BUG: kernel NULL pointer dereference, address: 00000000000000b8 |
| RIP: 0010:mock_phc_destroy+0xd/0x30 |
| Call Trace: |
| <TASK> |
| nsim_destroy+0x4a/0x70 [netdevsim] |
| __nsim_dev_port_del+0x47/0x70 [netdevsim] |
| nsim_dev_reload_destroy+0x105/0x120 [netdevsim] |
| nsim_drv_remove+0x2f/0xb0 [netdevsim] |
| device_release_driver_internal+0x1a1/0x210 |
| bus_remove_device+0xd5/0x120 |
| device_del+0x159/0x490 |
| device_unregister+0x12/0x30 |
| del_device_store+0x11a/0x1a0 [netdevsim] |
| kernfs_fop_write_iter+0x130/0x1d0 |
| vfs_write+0x30b/0x4b0 |
| ksys_write+0x69/0xf0 |
| do_syscall_64+0xcc/0x1e0 |
| entry_SYSCALL_64_after_hwframe+0x6f/0x77 |
| |
| The Linux kernel CVE team has assigned CVE-2024-26587 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.6 with commit b63e78fca889e07931ec8f259701718a24e5052e and fixed in 6.6.14 with commit 08aca65997fb6f233066883b1f1e653bcb1f26ca |
| Issue introduced in 6.6 with commit b63e78fca889e07931ec8f259701718a24e5052e and fixed in 6.7.2 with commit c5068e442eed063d2f1658e6b6d3c1c6fcf1e588 |
| Issue introduced in 6.6 with commit b63e78fca889e07931ec8f259701718a24e5052e and fixed in 6.8 with commit ea937f77208323d35ffe2f8d8fc81b00118bfcda |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-26587 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/net/netdevsim/netdev.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/08aca65997fb6f233066883b1f1e653bcb1f26ca |
| https://git.kernel.org/stable/c/c5068e442eed063d2f1658e6b6d3c1c6fcf1e588 |
| https://git.kernel.org/stable/c/ea937f77208323d35ffe2f8d8fc81b00118bfcda |
