| 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-2022-49584: ixgbe: Add locking to prevent panic when setting sriov_numvfs to zero |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ixgbe: Add locking to prevent panic when setting sriov_numvfs to zero |
| |
| It is possible to disable VFs while the PF driver is processing requests |
| from the VF driver. This can result in a panic. |
| |
| BUG: unable to handle kernel paging request at 000000000000106c |
| PGD 0 P4D 0 |
| Oops: 0000 [#1] SMP NOPTI |
| CPU: 8 PID: 0 Comm: swapper/8 Kdump: loaded Tainted: G I --------- - |
| Hardware name: Dell Inc. PowerEdge R740/06WXJT, BIOS 2.8.2 08/27/2020 |
| RIP: 0010:ixgbe_msg_task+0x4c8/0x1690 [ixgbe] |
| Code: 00 00 48 8d 04 40 48 c1 e0 05 89 7c 24 24 89 fd 48 89 44 24 10 83 ff |
| 01 0f 84 b8 04 00 00 4c 8b 64 24 10 4d 03 a5 48 22 00 00 <41> 80 7c 24 4c |
| 00 0f 84 8a 03 00 00 0f b7 c7 83 f8 08 0f 84 8f 0a |
| RSP: 0018:ffffb337869f8df8 EFLAGS: 00010002 |
| RAX: 0000000000001020 RBX: 0000000000000000 RCX: 000000000000002b |
| RDX: 0000000000000002 RSI: 0000000000000008 RDI: 0000000000000006 |
| RBP: 0000000000000006 R08: 0000000000000002 R09: 0000000000029780 |
| R10: 00006957d8f42832 R11: 0000000000000000 R12: 0000000000001020 |
| R13: ffff8a00e8978ac0 R14: 000000000000002b R15: ffff8a00e8979c80 |
| FS: 0000000000000000(0000) GS:ffff8a07dfd00000(0000) knlGS:00000000000000 |
| CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 |
| CR2: 000000000000106c CR3: 0000000063e10004 CR4: 00000000007726e0 |
| DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 |
| DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 |
| PKRU: 55555554 |
| Call Trace: |
| <IRQ> |
| ? ttwu_do_wakeup+0x19/0x140 |
| ? try_to_wake_up+0x1cd/0x550 |
| ? ixgbevf_update_xcast_mode+0x71/0xc0 [ixgbevf] |
| ixgbe_msix_other+0x17e/0x310 [ixgbe] |
| __handle_irq_event_percpu+0x40/0x180 |
| handle_irq_event_percpu+0x30/0x80 |
| handle_irq_event+0x36/0x53 |
| handle_edge_irq+0x82/0x190 |
| handle_irq+0x1c/0x30 |
| do_IRQ+0x49/0xd0 |
| common_interrupt+0xf/0xf |
| |
| This can be eventually be reproduced with the following script: |
| |
| while : |
| do |
| echo 63 > /sys/class/net/<devname>/device/sriov_numvfs |
| sleep 1 |
| echo 0 > /sys/class/net/<devname>/device/sriov_numvfs |
| sleep 1 |
| done |
| |
| Add lock when disabling SR-IOV to prevent process VF mailbox communication. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49584 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.6 with commit d773d1310625be3b040b436178ad59a0af8888f1 and fixed in 5.4.208 with commit 031af9e617a6f51075d97e56fc9e712c7dde2508 |
| Issue introduced in 3.6 with commit d773d1310625be3b040b436178ad59a0af8888f1 and fixed in 5.10.134 with commit b82de63f8f817b5735480293dda8e92ba8170c52 |
| Issue introduced in 3.6 with commit d773d1310625be3b040b436178ad59a0af8888f1 and fixed in 5.15.58 with commit 16f929a5e76fd047fd8697e1e568bdd7d771955c |
| Issue introduced in 3.6 with commit d773d1310625be3b040b436178ad59a0af8888f1 and fixed in 5.18.15 with commit 9d925d2dc82cec2bcbd8625457645d8a548ab22e |
| Issue introduced in 3.6 with commit d773d1310625be3b040b436178ad59a0af8888f1 and fixed in 5.19 with commit 1e53834ce541d4fe271cdcca7703e50be0a44f8a |
| |
| 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-2022-49584 |
| 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/ethernet/intel/ixgbe/ixgbe.h |
| drivers/net/ethernet/intel/ixgbe/ixgbe_main.c |
| drivers/net/ethernet/intel/ixgbe/ixgbe_sriov.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/031af9e617a6f51075d97e56fc9e712c7dde2508 |
| https://git.kernel.org/stable/c/b82de63f8f817b5735480293dda8e92ba8170c52 |
| https://git.kernel.org/stable/c/16f929a5e76fd047fd8697e1e568bdd7d771955c |
| https://git.kernel.org/stable/c/9d925d2dc82cec2bcbd8625457645d8a548ab22e |
| https://git.kernel.org/stable/c/1e53834ce541d4fe271cdcca7703e50be0a44f8a |
