| 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-2024-49942: drm/xe: Prevent null pointer access in xe_migrate_copy |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/xe: Prevent null pointer access in xe_migrate_copy |
| |
| xe_migrate_copy designed to copy content of TTM resources. When source |
| resource is null, it will trigger a NULL pointer dereference in |
| xe_migrate_copy. To avoid this situation, update lacks source flag to |
| true for this case, the flag will trigger xe_migrate_clear rather than |
| xe_migrate_copy. |
| |
| Issue trace: |
| <7> [317.089847] xe 0000:00:02.0: [drm:xe_migrate_copy [xe]] Pass 14, |
| sizes: 4194304 & 4194304 |
| <7> [317.089945] xe 0000:00:02.0: [drm:xe_migrate_copy [xe]] Pass 15, |
| sizes: 4194304 & 4194304 |
| <1> [317.128055] BUG: kernel NULL pointer dereference, address: |
| 0000000000000010 |
| <1> [317.128064] #PF: supervisor read access in kernel mode |
| <1> [317.128066] #PF: error_code(0x0000) - not-present page |
| <6> [317.128069] PGD 0 P4D 0 |
| <4> [317.128071] Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI |
| <4> [317.128074] CPU: 1 UID: 0 PID: 1440 Comm: kunit_try_catch Tainted: |
| G U N 6.11.0-rc7-xe #1 |
| <4> [317.128078] Tainted: [U]=USER, [N]=TEST |
| <4> [317.128080] Hardware name: Intel Corporation Lunar Lake Client |
| Platform/LNL-M LP5 RVP1, BIOS LNLMFWI1.R00.3221.D80.2407291239 07/29/2024 |
| <4> [317.128082] RIP: 0010:xe_migrate_copy+0x66/0x13e0 [xe] |
| <4> [317.128158] Code: 00 00 48 89 8d e0 fe ff ff 48 8b 40 10 4c 89 85 c8 |
| fe ff ff 44 88 8d bd fe ff ff 65 48 8b 3c 25 28 00 00 00 48 89 7d d0 31 |
| ff <8b> 79 10 48 89 85 a0 fe ff ff 48 8b 00 48 89 b5 d8 fe ff ff 83 ff |
| <4> [317.128162] RSP: 0018:ffffc9000167f9f0 EFLAGS: 00010246 |
| <4> [317.128164] RAX: ffff8881120d8028 RBX: ffff88814d070428 RCX: |
| 0000000000000000 |
| <4> [317.128166] RDX: ffff88813cb99c00 RSI: 0000000004000000 RDI: |
| 0000000000000000 |
| <4> [317.128168] RBP: ffffc9000167fbb8 R08: ffff88814e7b1f08 R09: |
| 0000000000000001 |
| <4> [317.128170] R10: 0000000000000001 R11: 0000000000000001 R12: |
| ffff88814e7b1f08 |
| <4> [317.128172] R13: ffff88814e7b1f08 R14: ffff88813cb99c00 R15: |
| 0000000000000001 |
| <4> [317.128174] FS: 0000000000000000(0000) GS:ffff88846f280000(0000) |
| knlGS:0000000000000000 |
| <4> [317.128176] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 |
| <4> [317.128178] CR2: 0000000000000010 CR3: 000000011f676004 CR4: |
| 0000000000770ef0 |
| <4> [317.128180] DR0: 0000000000000000 DR1: 0000000000000000 DR2: |
| 0000000000000000 |
| <4> [317.128182] DR3: 0000000000000000 DR6: 00000000ffff07f0 DR7: |
| 0000000000000400 |
| <4> [317.128184] PKRU: 55555554 |
| <4> [317.128185] Call Trace: |
| <4> [317.128187] <TASK> |
| <4> [317.128189] ? show_regs+0x67/0x70 |
| <4> [317.128194] ? __die_body+0x20/0x70 |
| <4> [317.128196] ? __die+0x2b/0x40 |
| <4> [317.128198] ? page_fault_oops+0x15f/0x4e0 |
| <4> [317.128203] ? do_user_addr_fault+0x3fb/0x970 |
| <4> [317.128205] ? lock_acquire+0xc7/0x2e0 |
| <4> [317.128209] ? exc_page_fault+0x87/0x2b0 |
| <4> [317.128212] ? asm_exc_page_fault+0x27/0x30 |
| <4> [317.128216] ? xe_migrate_copy+0x66/0x13e0 [xe] |
| <4> [317.128263] ? __lock_acquire+0xb9d/0x26f0 |
| <4> [317.128265] ? __lock_acquire+0xb9d/0x26f0 |
| <4> [317.128267] ? sg_free_append_table+0x20/0x80 |
| <4> [317.128271] ? lock_acquire+0xc7/0x2e0 |
| <4> [317.128273] ? mark_held_locks+0x4d/0x80 |
| <4> [317.128275] ? trace_hardirqs_on+0x1e/0xd0 |
| <4> [317.128278] ? _raw_spin_unlock_irqrestore+0x31/0x60 |
| <4> [317.128281] ? __pm_runtime_resume+0x60/0xa0 |
| <4> [317.128284] xe_bo_move+0x682/0xc50 [xe] |
| <4> [317.128315] ? lock_is_held_type+0xaa/0x120 |
| <4> [317.128318] ttm_bo_handle_move_mem+0xe5/0x1a0 [ttm] |
| <4> [317.128324] ttm_bo_validate+0xd1/0x1a0 [ttm] |
| <4> [317.128328] shrink_test_run_device+0x721/0xc10 [xe] |
| <4> [317.128360] ? find_held_lock+0x31/0x90 |
| <4> [317.128363] ? lock_release+0xd1/0x2a0 |
| <4> [317.128365] ? __pfx_kunit_generic_run_threadfn_adapter+0x10/0x10 |
| [kunit] |
| <4> [317.128370] xe_bo_shrink_kunit+0x11/0x20 [xe] |
| <4> [317.128397] kunit_try_run_case+0x6e/0x150 [kunit] |
| <4> [317.128400] ? trace_hardirqs_on+0x1e/0xd0 |
| <4> [317.128402] ? _raw_spin_unlock_irqrestore+0x31/0x60 |
| <4> [317.128404] kunit_generic_run_threadfn_adapter+0x1e/0x40 [kunit] |
| <4> [317.128407] kthread+0xf5/0x130 |
| <4> [317.128410] ? __pfx_kthread+0x10/0x10 |
| <4> [317.128412] ret_from_fork+0x39/0x60 |
| <4> [317.128415] ? __pfx_kthread+0x10/0x10 |
| <4> [317.128416] ret_from_fork_asm+0x1a/0x30 |
| <4> [317.128420] </TASK> |
| |
| (cherry picked from commit 59a1c9c7e1d02b43b415ea92627ce095b7c79e47) |
| |
| The Linux kernel CVE team has assigned CVE-2024-49942 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.8 with commit 266c85885263022954928b125d46ab7a78c77a69 and fixed in 6.10.14 with commit 16e0267db156f8a4ea16bfb3ac3f5743c9698df3 |
| Issue introduced in 6.8 with commit 266c85885263022954928b125d46ab7a78c77a69 and fixed in 6.11.3 with commit 8f5199b6971f0717c2d31685953971fa2e1b9e1a |
| Issue introduced in 6.8 with commit 266c85885263022954928b125d46ab7a78c77a69 and fixed in 6.12 with commit 7257d9c9a3c6cfe26c428e9b7ae21d61f2f55a79 |
| |
| 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-2024-49942 |
| 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/xe/xe_bo.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/16e0267db156f8a4ea16bfb3ac3f5743c9698df3 |
| https://git.kernel.org/stable/c/8f5199b6971f0717c2d31685953971fa2e1b9e1a |
| https://git.kernel.org/stable/c/7257d9c9a3c6cfe26c428e9b7ae21d61f2f55a79 |
