cve-2021-47413
Vulnerability from cvelistv5
Published
2024-05-21 15:04
Modified
2024-12-19 07:41
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: usb: chipidea: ci_hdrc_imx: Also search for 'phys' phandle When passing 'phys' in the devicetree to describe the USB PHY phandle (which is the recommended way according to Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt) the following NULL pointer dereference is observed on i.MX7 and i.MX8MM: [ 1.489344] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000098 [ 1.498170] Mem abort info: [ 1.500966] ESR = 0x96000044 [ 1.504030] EC = 0x25: DABT (current EL), IL = 32 bits [ 1.509356] SET = 0, FnV = 0 [ 1.512416] EA = 0, S1PTW = 0 [ 1.515569] FSC = 0x04: level 0 translation fault [ 1.520458] Data abort info: [ 1.523349] ISV = 0, ISS = 0x00000044 [ 1.527196] CM = 0, WnR = 1 [ 1.530176] [0000000000000098] user address but active_mm is swapper [ 1.536544] Internal error: Oops: 96000044 [#1] PREEMPT SMP [ 1.542125] Modules linked in: [ 1.545190] CPU: 3 PID: 7 Comm: kworker/u8:0 Not tainted 5.14.0-dirty #3 [ 1.551901] Hardware name: Kontron i.MX8MM N801X S (DT) [ 1.557133] Workqueue: events_unbound deferred_probe_work_func [ 1.562984] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--) [ 1.568998] pc : imx7d_charger_detection+0x3f0/0x510 [ 1.573973] lr : imx7d_charger_detection+0x22c/0x510 This happens because the charger functions check for the phy presence inside the imx_usbmisc_data structure (data->usb_phy), but the chipidea core populates the usb_phy passed via 'phys' inside 'struct ci_hdrc' (ci->usb_phy) instead. This causes the NULL pointer dereference inside imx7d_charger_detection(). Fix it by also searching for 'phys' in case 'fsl,usbphy' is not found. Tested on a imx7s-warp board.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/66dd03b10e1c0b2fae006c6e34c18ea8ee033e7bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8253a34bfae3278baca52fc1209b7c29270486caPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b3265b88e83b16c7be762fa5fb7e0632bce0002cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/66dd03b10e1c0b2fae006c6e34c18ea8ee033e7bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8253a34bfae3278baca52fc1209b7c29270486caPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b3265b88e83b16c7be762fa5fb7e0632bce0002cPatch
Impacted products
Vendor Product Version
Linux Linux Version: 746f316b753a83e366bfc5f936cbf0d72d1c2d1d
Version: 746f316b753a83e366bfc5f936cbf0d72d1c2d1d
Version: 746f316b753a83e366bfc5f936cbf0d72d1c2d1d
 Create a notification for this product.
   Linux Linux Version: 5.8
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                        id: "CVE-2021-47413",
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      dateReserved: "2024-05-21T14:58:30.818Z",
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Esto provoca la desreferencia del puntero NULL dentro de imx7d_charger_detection(). Solucione el problema buscando también 'phys' en caso de que no se encuentre 'fsl,usbphy'. Probado en una placa imx7s-warp.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.8\",\"versionEndExcluding\":\"5.10.73\",\"matchCriteriaId\":\"CF25CE87-2A22-42E7-B959-33757194C123\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.14.12\",\"matchCriteriaId\":\"20EB962C-32DC-448F-A900-BCF9A726F9EB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E46C74C6-B76B-4C94-A6A4-FD2FFF62D644\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"60134C3A-06E4-48C1-B04F-2903732A4E56\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"0460DA88-8FE1-46A2-9DDA-1F1ABA552E71\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"AF55383D-4DF2-45DC-93F7-571F4F978EAB\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/66dd03b10e1c0b2fae006c6e34c18ea8ee033e7b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8253a34bfae3278baca52fc1209b7c29270486ca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b3265b88e83b16c7be762fa5fb7e0632bce0002c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/66dd03b10e1c0b2fae006c6e34c18ea8ee033e7b\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8253a34bfae3278baca52fc1209b7c29270486ca\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b3265b88e83b16c7be762fa5fb7e0632bce0002c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]}]}}",
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\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.8\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.8\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.73\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.14.12\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.14.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/usb/chipidea/ci_hdrc_imx.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/b3265b88e83b16c7be762fa5fb7e0632bce0002c\"}, {\"url\": \"https://git.kernel.org/stable/c/66dd03b10e1c0b2fae006c6e34c18ea8ee033e7b\"}, {\"url\": \"https://git.kernel.org/stable/c/8253a34bfae3278baca52fc1209b7c29270486ca\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nusb: chipidea: ci_hdrc_imx: Also search for 'phys' phandle\\n\\nWhen passing 'phys' in the devicetree to describe the USB PHY phandle\\n(which is the recommended way according to\\nDocumentation/devicetree/bindings/usb/ci-hdrc-usb2.txt) the\\nfollowing NULL pointer dereference is observed on i.MX7 and i.MX8MM:\\n\\n[    1.489344] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000098\\n[    1.498170] Mem abort info:\\n[    1.500966]   ESR = 0x96000044\\n[    1.504030]   EC = 0x25: DABT (current EL), IL = 32 bits\\n[    1.509356]   SET = 0, FnV = 0\\n[    1.512416]   EA = 0, S1PTW = 0\\n[    1.515569]   FSC = 0x04: level 0 translation fault\\n[    1.520458] Data abort info:\\n[    1.523349]   ISV = 0, ISS = 0x00000044\\n[    1.527196]   CM = 0, WnR = 1\\n[    1.530176] [0000000000000098] user address but active_mm is swapper\\n[    1.536544] Internal error: Oops: 96000044 [#1] PREEMPT SMP\\n[    1.542125] Modules linked in:\\n[    1.545190] CPU: 3 PID: 7 Comm: kworker/u8:0 Not tainted 5.14.0-dirty #3\\n[    1.551901] Hardware name: Kontron i.MX8MM N801X S (DT)\\n[    1.557133] Workqueue: events_unbound deferred_probe_work_func\\n[    1.562984] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO BTYPE=--)\\n[    1.568998] pc : imx7d_charger_detection+0x3f0/0x510\\n[    1.573973] lr : imx7d_charger_detection+0x22c/0x510\\n\\nThis happens because the charger functions check for the phy presence\\ninside the imx_usbmisc_data structure (data->usb_phy), but the chipidea\\ncore populates the usb_phy passed via 'phys' inside 'struct ci_hdrc'\\n(ci->usb_phy) instead.\\n\\nThis causes the NULL pointer dereference inside imx7d_charger_detection().\\n\\nFix it by also searching for 'phys' in case 'fsl,usbphy' is not found.\\n\\nTested on a imx7s-warp board.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T07:41:30.695Z\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2021-47413\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T07:41:30.695Z\", \"dateReserved\": \"2024-05-21T14:58:30.818Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T15:04:04.060Z\", \"assignerShortName\": \"Linux\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


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