| 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-2024-45012: nouveau/firmware: use dma non-coherent allocator |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| nouveau/firmware: use dma non-coherent allocator |
| |
| Currently, enabling SG_DEBUG in the kernel will cause nouveau to hit a |
| BUG() on startup, when the iommu is enabled: |
| |
| kernel BUG at include/linux/scatterlist.h:187! |
| invalid opcode: 0000 [#1] PREEMPT SMP NOPTI |
| CPU: 7 PID: 930 Comm: (udev-worker) Not tainted 6.9.0-rc3Lyude-Test+ #30 |
| Hardware name: MSI MS-7A39/A320M GAMING PRO (MS-7A39), BIOS 1.I0 01/22/2019 |
| RIP: 0010:sg_init_one+0x85/0xa0 |
| Code: 69 88 32 01 83 e1 03 f6 c3 03 75 20 a8 01 75 1e 48 09 cb 41 89 54 |
| 24 08 49 89 1c 24 41 89 6c 24 0c 5b 5d 41 5c e9 7b b9 88 00 <0f> 0b 0f 0b |
| 0f 0b 48 8b 05 5e 46 9a 01 eb b2 66 66 2e 0f 1f 84 00 |
| RSP: 0018:ffffa776017bf6a0 EFLAGS: 00010246 |
| RAX: 0000000000000000 RBX: ffffa77600d87000 RCX: 000000000000002b |
| RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffffa77680d87000 |
| RBP: 000000000000e000 R08: 0000000000000000 R09: 0000000000000000 |
| R10: ffff98f4c46aa508 R11: 0000000000000000 R12: ffff98f4c46aa508 |
| R13: ffff98f4c46aa008 R14: ffffa77600d4a000 R15: ffffa77600d4a018 |
| FS: 00007feeb5aae980(0000) GS:ffff98f5c4dc0000(0000) knlGS:0000000000000000 |
| CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 |
| CR2: 00007f22cb9a4520 CR3: 00000001043ba000 CR4: 00000000003506f0 |
| Call Trace: |
| <TASK> |
| ? die+0x36/0x90 |
| ? do_trap+0xdd/0x100 |
| ? sg_init_one+0x85/0xa0 |
| ? do_error_trap+0x65/0x80 |
| ? sg_init_one+0x85/0xa0 |
| ? exc_invalid_op+0x50/0x70 |
| ? sg_init_one+0x85/0xa0 |
| ? asm_exc_invalid_op+0x1a/0x20 |
| ? sg_init_one+0x85/0xa0 |
| nvkm_firmware_ctor+0x14a/0x250 [nouveau] |
| nvkm_falcon_fw_ctor+0x42/0x70 [nouveau] |
| ga102_gsp_booter_ctor+0xb4/0x1a0 [nouveau] |
| r535_gsp_oneinit+0xb3/0x15f0 [nouveau] |
| ? srso_return_thunk+0x5/0x5f |
| ? srso_return_thunk+0x5/0x5f |
| ? nvkm_udevice_new+0x95/0x140 [nouveau] |
| ? srso_return_thunk+0x5/0x5f |
| ? srso_return_thunk+0x5/0x5f |
| ? ktime_get+0x47/0xb0 |
| |
| Fix this by using the non-coherent allocator instead, I think there |
| might be a better answer to this, but it involve ripping up some of |
| APIs using sg lists. |
| |
| The Linux kernel CVE team has assigned CVE-2024-45012 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.2 with commit 2541626cfb794e57ba0575a6920826f591f7ced0 and fixed in 6.6.48 with commit cc29c5546c6a373648363ac49781f1d74b530707 |
| Issue introduced in 6.2 with commit 2541626cfb794e57ba0575a6920826f591f7ced0 and fixed in 6.10.7 with commit 57ca481fca97ca4553e8c85d6a94baf4cb40c40e |
| Issue introduced in 6.2 with commit 2541626cfb794e57ba0575a6920826f591f7ced0 and fixed in 6.11 with commit 9b340aeb26d50e9a9ec99599e2a39b035fac978e |
| |
| 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-2024-45012 |
| 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/gpu/drm/nouveau/nvkm/core/firmware.c |
| drivers/gpu/drm/nouveau/nvkm/falcon/fw.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/cc29c5546c6a373648363ac49781f1d74b530707 |
| https://git.kernel.org/stable/c/57ca481fca97ca4553e8c85d6a94baf4cb40c40e |
| https://git.kernel.org/stable/c/9b340aeb26d50e9a9ec99599e2a39b035fac978e |
