| 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-2022-49261: drm/i915/gem: add missing boundary check in vm_access |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drm/i915/gem: add missing boundary check in vm_access |
| |
| A missing bounds check in vm_access() can lead to an out-of-bounds read |
| or write in the adjacent memory area, since the len attribute is not |
| validated before the memcpy later in the function, potentially hitting: |
| |
| [ 183.637831] BUG: unable to handle page fault for address: ffffc90000c86000 |
| [ 183.637934] #PF: supervisor read access in kernel mode |
| [ 183.637997] #PF: error_code(0x0000) - not-present page |
| [ 183.638059] PGD 100000067 P4D 100000067 PUD 100258067 PMD 106341067 PTE 0 |
| [ 183.638144] Oops: 0000 [#2] PREEMPT SMP NOPTI |
| [ 183.638201] CPU: 3 PID: 1790 Comm: poc Tainted: G D 5.17.0-rc6-ci-drm-11296+ #1 |
| [ 183.638298] Hardware name: Intel Corporation CoffeeLake Client Platform/CoffeeLake H DDR4 RVP, BIOS CNLSFWR1.R00.X208.B00.1905301319 05/30/2019 |
| [ 183.638430] RIP: 0010:memcpy_erms+0x6/0x10 |
| [ 183.640213] RSP: 0018:ffffc90001763d48 EFLAGS: 00010246 |
| [ 183.641117] RAX: ffff888109c14000 RBX: ffff888111bece40 RCX: 0000000000000ffc |
| [ 183.642029] RDX: 0000000000001000 RSI: ffffc90000c86000 RDI: ffff888109c14004 |
| [ 183.642946] RBP: 0000000000000ffc R08: 800000000000016b R09: 0000000000000000 |
| [ 183.643848] R10: ffffc90000c85000 R11: 0000000000000048 R12: 0000000000001000 |
| [ 183.644742] R13: ffff888111bed190 R14: ffff888109c14000 R15: 0000000000001000 |
| [ 183.645653] FS: 00007fe5ef807540(0000) GS:ffff88845b380000(0000) knlGS:0000000000000000 |
| [ 183.646570] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 |
| [ 183.647481] CR2: ffffc90000c86000 CR3: 000000010ff02006 CR4: 00000000003706e0 |
| [ 183.648384] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 |
| [ 183.649271] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 |
| [ 183.650142] Call Trace: |
| [ 183.650988] <TASK> |
| [ 183.651793] vm_access+0x1f0/0x2a0 [i915] |
| [ 183.652726] __access_remote_vm+0x224/0x380 |
| [ 183.653561] mem_rw.isra.0+0xf9/0x190 |
| [ 183.654402] vfs_read+0x9d/0x1b0 |
| [ 183.655238] ksys_read+0x63/0xe0 |
| [ 183.656065] do_syscall_64+0x38/0xc0 |
| [ 183.656882] entry_SYSCALL_64_after_hwframe+0x44/0xae |
| [ 183.657663] RIP: 0033:0x7fe5ef725142 |
| [ 183.659351] RSP: 002b:00007ffe1e81c7e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 |
| [ 183.660227] RAX: ffffffffffffffda RBX: 0000557055dfb780 RCX: 00007fe5ef725142 |
| [ 183.661104] RDX: 0000000000001000 RSI: 00007ffe1e81d880 RDI: 0000000000000005 |
| [ 183.661972] RBP: 00007ffe1e81e890 R08: 0000000000000030 R09: 0000000000000046 |
| [ 183.662832] R10: 0000557055dfc2e0 R11: 0000000000000246 R12: 0000557055dfb1c0 |
| [ 183.663691] R13: 00007ffe1e81e980 R14: 0000000000000000 R15: 0000000000000000 |
| |
| Changes since v1: |
| - Updated if condition with range_overflows_t [Chris Wilson] |
| |
| [mauld: tidy up the commit message and add Cc: stable] |
| (cherry picked from commit 661412e301e2ca86799aa4f400d1cf0bd38c57c6) |
| |
| The Linux kernel CVE team has assigned CVE-2022-49261 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.8 with commit 9f909e215fea0652023b9ed09d3d7bfe10386423 and fixed in 5.10.110 with commit 89ddcc81914ab58cc203acc844f27d55ada8ec0e |
| Issue introduced in 5.8 with commit 9f909e215fea0652023b9ed09d3d7bfe10386423 and fixed in 5.15.33 with commit 312d3d4f49e12f97260bcf972c848c3562126a18 |
| Issue introduced in 5.8 with commit 9f909e215fea0652023b9ed09d3d7bfe10386423 and fixed in 5.16.19 with commit 5f6e560e3e86ac053447524224e411034f41f5c7 |
| Issue introduced in 5.8 with commit 9f909e215fea0652023b9ed09d3d7bfe10386423 and fixed in 5.17.2 with commit 8f0ebea8f6e8c474264ed97d7a64c9c09ed4f5aa |
| Issue introduced in 5.8 with commit 9f909e215fea0652023b9ed09d3d7bfe10386423 and fixed in 5.18 with commit 3886a86e7e6cc6ce2ce93c440fecd8f42aed0ce7 |
| |
| 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-2022-49261 |
| 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/i915/gem/i915_gem_mman.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/89ddcc81914ab58cc203acc844f27d55ada8ec0e |
| https://git.kernel.org/stable/c/312d3d4f49e12f97260bcf972c848c3562126a18 |
| https://git.kernel.org/stable/c/5f6e560e3e86ac053447524224e411034f41f5c7 |
| https://git.kernel.org/stable/c/8f0ebea8f6e8c474264ed97d7a64c9c09ed4f5aa |
| https://git.kernel.org/stable/c/3886a86e7e6cc6ce2ce93c440fecd8f42aed0ce7 |
