cve-2021-47535
Vulnerability from cvelistv5
Published
2024-05-24 15:09
Modified
2024-12-19 07:44
Severity ?
6.2 (Medium) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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 a6xx_get_gmu_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 _a6xx_get_gmu_registers+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: dump_backtrace+0x0/0x248 show_stack+0x20/0x2c dump_stack+0x128/0x1ec print_address_description+0x88/0x4a0 __kasan_report+0xfc/0x120 kasan_report+0x10/0x18 __asan_report_store8_noabort+0x1c/0x24 _a6xx_get_gmu_registers+0x144/0x430 a6xx_gpu_state_get+0x330/0x25d4 msm_gpu_crashstate_capture+0xa0/0x84c recover_worker+0x328/0x838 kthread_worker_fn+0x32c/0x574 kthread+0x2dc/0x39c ret_from_fork+0x10/0x18 Allocated by task 209: __kasan_kmalloc+0xfc/0x1c4 kasan_kmalloc+0xc/0x14 kmem_cache_alloc_trace+0x1f0/0x2a0 a6xx_gpu_state_get+0x164/0x25d4 msm_gpu_crashstate_capture+0xa0/0x84c recover_worker+0x328/0x838 kthread_worker_fn+0x32c/0x574 kthread+0x2dc/0x39c ret_from_fork+0x10/0x18
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/83e54fcf0b14ca2d869dd37abe1bb6542805f538
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b4d25abf9720b69a03465b09d0d62d1998ed6708
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d646856a600e8635ba498f20b194219b158626e8
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/83e54fcf0b14ca2d869dd37abe1bb6542805f538
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b4d25abf9720b69a03465b09d0d62d1998ed6708
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d646856a600e8635ba498f20b194219b158626e8
Impacted products
Vendor Product Version
Linux Linux Version: 142639a52a01e90c512a9a8d2156997e02a65b53
Version: 142639a52a01e90c512a9a8d2156997e02a65b53
Version: 142639a52a01e90c512a9a8d2156997e02a65b53
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   Linux Linux Version: 5.9
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      datePublished: "2024-05-24T15:09:43.994Z",
      dateReserved: "2024-05-24T15:02:54.826Z",
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         containers: "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/d646856a600e8635ba498f20b194219b158626e8\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/83e54fcf0b14ca2d869dd37abe1bb6542805f538\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/b4d25abf9720b69a03465b09d0d62d1998ed6708\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-04T05:39:59.827Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 6.2, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2021-47535\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-17T17:34:34.685290Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-787\", \"description\": \"CWE-787 Out-of-bounds Write\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-17T17:34:35.689Z\"}}], \"cna\": {\"title\": \"drm/msm/a6xx: Allocate enough space for GMU registers\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"142639a52a01\", \"lessThan\": \"d646856a600e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"142639a52a01\", \"lessThan\": \"83e54fcf0b14\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"142639a52a01\", \"lessThan\": \"b4d25abf9720\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.9\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.9\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.84\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/gpu/drm/msm/adreno/a6xx_gpu_state.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/d646856a600e8635ba498f20b194219b158626e8\"}, {\"url\": \"https://git.kernel.org/stable/c/83e54fcf0b14ca2d869dd37abe1bb6542805f538\"}, {\"url\": \"https://git.kernel.org/stable/c/b4d25abf9720b69a03465b09d0d62d1998ed6708\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/msm/a6xx: Allocate enough space for GMU registers\\n\\nIn commit 142639a52a01 (\\\"drm/msm/a6xx: fix crashstate capture for\\nA650\\\") we changed a6xx_get_gmu_registers() to read 3 sets of\\nregisters. Unfortunately, we didn't change the memory allocation for\\nthe array. That leads to a KASAN warning (this was on the chromeos-5.4\\nkernel, which has the problematic commit backported to it):\\n\\n  BUG: KASAN: slab-out-of-bounds in _a6xx_get_gmu_registers+0x144/0x430\\n  Write of size 8 at addr ffffff80c89432b0 by task A618-worker/209\\n  CPU: 5 PID: 209 Comm: A618-worker Tainted: G        W         5.4.156-lockdep #22\\n  Hardware name: Google Lazor Limozeen without Touchscreen (rev5 - rev8) (DT)\\n  Call trace:\\n   dump_backtrace+0x0/0x248\\n   show_stack+0x20/0x2c\\n   dump_stack+0x128/0x1ec\\n   print_address_description+0x88/0x4a0\\n   __kasan_report+0xfc/0x120\\n   kasan_report+0x10/0x18\\n   __asan_report_store8_noabort+0x1c/0x24\\n   _a6xx_get_gmu_registers+0x144/0x430\\n   a6xx_gpu_state_get+0x330/0x25d4\\n   msm_gpu_crashstate_capture+0xa0/0x84c\\n   recover_worker+0x328/0x838\\n   kthread_worker_fn+0x32c/0x574\\n   kthread+0x2dc/0x39c\\n   ret_from_fork+0x10/0x18\\n\\n  Allocated by task 209:\\n   __kasan_kmalloc+0xfc/0x1c4\\n   kasan_kmalloc+0xc/0x14\\n   kmem_cache_alloc_trace+0x1f0/0x2a0\\n   a6xx_gpu_state_get+0x164/0x25d4\\n   msm_gpu_crashstate_capture+0xa0/0x84c\\n   recover_worker+0x328/0x838\\n   kthread_worker_fn+0x32c/0x574\\n   kthread+0x2dc/0x39c\\n   ret_from_fork+0x10/0x18\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-04T12:07:48.679Z\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2021-47535\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-04T18:09:25.843Z\", \"dateReserved\": \"2024-05-24T15:02:54.826Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-24T15:09:43.994Z\", \"assignerShortName\": \"Linux\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


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