CVE-2021-47535

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Source
https://cve.org/CVERecord?id=CVE-2021-47535
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47535.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2021-47535
Downstream
Related
Published
2024-05-24T15:15:17.120Z
Modified
2026-03-13T05:19:27.259322Z
Severity
  • 6.2 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

drm/msm/a6xx: Allocate enough space for GMU registers

In commit 142639a52a01 ("drm/msm/a6xx: fix crashstate capture for A650") we changed a6xxgetgmu_registers() to read 3 sets of registers. Unfortunately, we didn't change the memory allocation for the array. That leads to a KASAN warning (this was on the chromeos-5.4 kernel, which has the problematic commit backported to it):

BUG: KASAN: slab-out-of-bounds in a6xxgetgmuregisters+0x144/0x430 Write of size 8 at addr ffffff80c89432b0 by task A618-worker/209 CPU: 5 PID: 209 Comm: A618-worker Tainted: G W 5.4.156-lockdep #22 Hardware name: Google Lazor Limozeen without Touchscreen (rev5 - rev8) (DT) Call trace: dumpbacktrace+0x0/0x248 showstack+0x20/0x2c dumpstack+0x128/0x1ec printaddress_description+0x88/0x4a0 __kasanreport+0xfc/0x120 kasanreport+0x10/0x18 __asanreportstore8noabort+0x1c/0x24 a6xxgetgmuregisters+0x144/0x430 a6xxgpustateget+0x330/0x25d4 msmgpucrashstatecapture+0xa0/0x84c recoverworker+0x328/0x838 kthreadworkerfn+0x32c/0x574 kthread+0x2dc/0x39c retfromfork+0x10/0x18

Allocated by task 209: __kasankmalloc+0xfc/0x1c4 kasankmalloc+0xc/0x14 kmemcachealloctrace+0x1f0/0x2a0 a6xxgpustateget+0x164/0x25d4 msmgpucrashstatecapture+0xa0/0x84c recoverworker+0x328/0x838 kthreadworkerfn+0x32c/0x574 kthread+0x2dc/0x39c retfromfork+0x10/0x18

References

Affected packages

Git /

Affected ranges

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47535.json"
unresolved_ranges 
[
    {
        "events": [
            {
                "introduced": "5.9"
            },
            {
                "fixed": "5.10.84"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "5.11"
            },
            {
                "fixed": "5.15.7"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "5.16-rc1"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "5.16-rc2"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "5.16-rc3"
            }
        ]
    }
]