CVE-2024-47720 (GCVE-0-2024-47720)

Vulnerability from cvelistv5 – Published: 2024-10-21 11:53 – Updated: 2025-11-03 22:21
VLAI?
Title
drm/amd/display: Add null check for set_output_gamma in dcn30_set_output_transfer_func
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add null check for set_output_gamma in dcn30_set_output_transfer_func This commit adds a null check for the set_output_gamma function pointer in the dcn30_set_output_transfer_func function. Previously, set_output_gamma was being checked for nullity at line 386, but then it was being dereferenced without any nullity check at line 401. This could potentially lead to a null pointer dereference error if set_output_gamma is indeed null. To fix this, we now ensure that set_output_gamma is not null before dereferencing it. We do this by adding a nullity check for set_output_gamma before the call to set_output_gamma at line 401. If set_output_gamma is null, we log an error message and do not call the function. This fix prevents a potential null pointer dereference error. drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn30/dcn30_hwseq.c:401 dcn30_set_output_transfer_func() error: we previously assumed 'mpc->funcs->set_output_gamma' could be null (see line 386) drivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn30/dcn30_hwseq.c 373 bool dcn30_set_output_transfer_func(struct dc *dc, 374 struct pipe_ctx *pipe_ctx, 375 const struct dc_stream_state *stream) 376 { 377 int mpcc_id = pipe_ctx->plane_res.hubp->inst; 378 struct mpc *mpc = pipe_ctx->stream_res.opp->ctx->dc->res_pool->mpc; 379 const struct pwl_params *params = NULL; 380 bool ret = false; 381 382 /* program OGAM or 3DLUT only for the top pipe*/ 383 if (pipe_ctx->top_pipe == NULL) { 384 /*program rmu shaper and 3dlut in MPC*/ 385 ret = dcn30_set_mpc_shaper_3dlut(pipe_ctx, stream); 386 if (ret == false && mpc->funcs->set_output_gamma) { ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ If this is NULL 387 if (stream->out_transfer_func.type == TF_TYPE_HWPWL) 388 params = &stream->out_transfer_func.pwl; 389 else if (pipe_ctx->stream->out_transfer_func.type == 390 TF_TYPE_DISTRIBUTED_POINTS && 391 cm3_helper_translate_curve_to_hw_format( 392 &stream->out_transfer_func, 393 &mpc->blender_params, false)) 394 params = &mpc->blender_params; 395 /* there are no ROM LUTs in OUTGAM */ 396 if (stream->out_transfer_func.type == TF_TYPE_PREDEFINED) 397 BREAK_TO_DEBUGGER(); 398 } 399 } 400 --> 401 mpc->funcs->set_output_gamma(mpc, mpcc_id, params); ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Then it will crash 402 return ret; 403 }
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d99f13878d6f9c286b13860d8bf0b4db9ffb189a , < 44948d3cb943602ba4a0b5ed3c91ae0525838fb1 (git)
Affected: d99f13878d6f9c286b13860d8bf0b4db9ffb189a , < 64886a4e6f1dce843c0889505cf0673b5211e16a (git)
Affected: d99f13878d6f9c286b13860d8bf0b4db9ffb189a , < ddf9ff244d704e1903533f7be377615ed34b83e7 (git)
Affected: d99f13878d6f9c286b13860d8bf0b4db9ffb189a , < 84edd5a3f5fa6aafa4afcaf9f101f46426c620c9 (git)
Affected: d99f13878d6f9c286b13860d8bf0b4db9ffb189a , < 72ee32d0907364104fbcf4f68dd5ae63cd8eae9e (git)
Affected: d99f13878d6f9c286b13860d8bf0b4db9ffb189a , < 08ae395ea22fb3d9b318c8bde28c0dfd2f5fa4d2 (git)
Create a notification for this product.
    Linux Linux Affected: 5.9
Unaffected: 0 , < 5.9 (semver)
Unaffected: 5.15.168 , ≤ 5.15.* (semver)
Unaffected: 6.1.113 , ≤ 6.1.* (semver)
Unaffected: 6.6.54 , ≤ 6.6.* (semver)
Unaffected: 6.10.13 , ≤ 6.10.* (semver)
Unaffected: 6.11.2 , ≤ 6.11.* (semver)
Unaffected: 6.12 , ≤ * (original_commit_for_fix)
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      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-47720\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-10-21T13:02:07.747616Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-21T13:02:10.851Z\"}}], \"cna\": {\"title\": \"drm/amd/display: Add null check for set_output_gamma in dcn30_set_output_transfer_func\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"d99f13878d6f9c286b13860d8bf0b4db9ffb189a\", \"lessThan\": \"44948d3cb943602ba4a0b5ed3c91ae0525838fb1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d99f13878d6f9c286b13860d8bf0b4db9ffb189a\", \"lessThan\": \"64886a4e6f1dce843c0889505cf0673b5211e16a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d99f13878d6f9c286b13860d8bf0b4db9ffb189a\", \"lessThan\": \"ddf9ff244d704e1903533f7be377615ed34b83e7\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d99f13878d6f9c286b13860d8bf0b4db9ffb189a\", \"lessThan\": \"84edd5a3f5fa6aafa4afcaf9f101f46426c620c9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d99f13878d6f9c286b13860d8bf0b4db9ffb189a\", \"lessThan\": \"72ee32d0907364104fbcf4f68dd5ae63cd8eae9e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d99f13878d6f9c286b13860d8bf0b4db9ffb189a\", \"lessThan\": \"08ae395ea22fb3d9b318c8bde28c0dfd2f5fa4d2\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/gpu/drm/amd/display/dc/hwss/dcn30/dcn30_hwseq.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\": \"5.15.168\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.113\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.54\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/gpu/drm/amd/display/dc/hwss/dcn30/dcn30_hwseq.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/44948d3cb943602ba4a0b5ed3c91ae0525838fb1\"}, {\"url\": \"https://git.kernel.org/stable/c/64886a4e6f1dce843c0889505cf0673b5211e16a\"}, {\"url\": \"https://git.kernel.org/stable/c/ddf9ff244d704e1903533f7be377615ed34b83e7\"}, {\"url\": \"https://git.kernel.org/stable/c/84edd5a3f5fa6aafa4afcaf9f101f46426c620c9\"}, {\"url\": \"https://git.kernel.org/stable/c/72ee32d0907364104fbcf4f68dd5ae63cd8eae9e\"}, {\"url\": \"https://git.kernel.org/stable/c/08ae395ea22fb3d9b318c8bde28c0dfd2f5fa4d2\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/amd/display: Add null check for set_output_gamma in dcn30_set_output_transfer_func\\n\\nThis commit adds a null check for the set_output_gamma function pointer\\nin the  dcn30_set_output_transfer_func function. Previously,\\nset_output_gamma was being checked for nullity at line 386, but then it\\nwas being dereferenced without any nullity check at line 401. This\\ncould potentially lead to a null pointer dereference error if\\nset_output_gamma is indeed null.\\n\\nTo fix this, we now ensure that set_output_gamma is not null before\\ndereferencing it. We do this by adding a nullity check for\\nset_output_gamma before the call to set_output_gamma at line 401. If\\nset_output_gamma is null, we log an error message and do not call the\\nfunction.\\n\\nThis fix prevents a potential null pointer dereference error.\\n\\ndrivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn30/dcn30_hwseq.c:401 dcn30_set_output_transfer_func()\\nerror: we previously assumed \u0027mpc-\u003efuncs-\u003eset_output_gamma\u0027 could be null (see line 386)\\n\\ndrivers/gpu/drm/amd/amdgpu/../display/dc/hwss/dcn30/dcn30_hwseq.c\\n    373 bool dcn30_set_output_transfer_func(struct dc *dc,\\n    374                                 struct pipe_ctx *pipe_ctx,\\n    375                                 const struct dc_stream_state *stream)\\n    376 {\\n    377         int mpcc_id = pipe_ctx-\u003eplane_res.hubp-\u003einst;\\n    378         struct mpc *mpc = pipe_ctx-\u003estream_res.opp-\u003ectx-\u003edc-\u003eres_pool-\u003empc;\\n    379         const struct pwl_params *params = NULL;\\n    380         bool ret = false;\\n    381\\n    382         /* program OGAM or 3DLUT only for the top pipe*/\\n    383         if (pipe_ctx-\u003etop_pipe == NULL) {\\n    384                 /*program rmu shaper and 3dlut in MPC*/\\n    385                 ret = dcn30_set_mpc_shaper_3dlut(pipe_ctx, stream);\\n    386                 if (ret == false \u0026\u0026 mpc-\u003efuncs-\u003eset_output_gamma) {\\n                                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ If this is NULL\\n\\n    387                         if (stream-\u003eout_transfer_func.type == TF_TYPE_HWPWL)\\n    388                                 params = \u0026stream-\u003eout_transfer_func.pwl;\\n    389                         else if (pipe_ctx-\u003estream-\u003eout_transfer_func.type ==\\n    390                                         TF_TYPE_DISTRIBUTED_POINTS \u0026\u0026\\n    391                                         cm3_helper_translate_curve_to_hw_format(\\n    392                                         \u0026stream-\u003eout_transfer_func,\\n    393                                         \u0026mpc-\u003eblender_params, false))\\n    394                                 params = \u0026mpc-\u003eblender_params;\\n    395                          /* there are no ROM LUTs in OUTGAM */\\n    396                         if (stream-\u003eout_transfer_func.type == TF_TYPE_PREDEFINED)\\n    397                                 BREAK_TO_DEBUGGER();\\n    398                 }\\n    399         }\\n    400\\n--\u003e 401         mpc-\u003efuncs-\u003eset_output_gamma(mpc, mpcc_id, params);\\n                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Then it will crash\\n\\n    402         return ret;\\n    403 }\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.168\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.113\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.54\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10.13\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.11.2\", \"versionStartIncluding\": \"5.9\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12\", \"versionStartIncluding\": \"5.9\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T09:38:15.217Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-47720\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-05-04T09:38:15.217Z\", \"dateReserved\": \"2024-09-30T16:00:12.950Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T11:53:50.178Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.