cve-2024-40976
Vulnerability from cvelistv5
Published
2024-07-12 12:32
Modified
2024-12-19 09:09
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: drm/lima: mask irqs in timeout path before hard reset There is a race condition in which a rendering job might take just long enough to trigger the drm sched job timeout handler but also still complete before the hard reset is done by the timeout handler. This runs into race conditions not expected by the timeout handler. In some very specific cases it currently may result in a refcount imbalance on lima_pm_idle, with a stack dump such as: [10136.669170] WARNING: CPU: 0 PID: 0 at drivers/gpu/drm/lima/lima_devfreq.c:205 lima_devfreq_record_idle+0xa0/0xb0 ... [10136.669459] pc : lima_devfreq_record_idle+0xa0/0xb0 ... [10136.669628] Call trace: [10136.669634] lima_devfreq_record_idle+0xa0/0xb0 [10136.669646] lima_sched_pipe_task_done+0x5c/0xb0 [10136.669656] lima_gp_irq_handler+0xa8/0x120 [10136.669666] __handle_irq_event_percpu+0x48/0x160 [10136.669679] handle_irq_event+0x4c/0xc0 We can prevent that race condition entirely by masking the irqs at the beginning of the timeout handler, at which point we give up on waiting for that job entirely. The irqs will be enabled again at the next hard reset which is already done as a recovery by the timeout handler.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/03e7b2f7ae4c0ae5fb8e4e2454ba4008877f196a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/58bfd311c93d66d8282bf21ebbf35cc3bb8ad9db
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/70aa1f2dec46b6fdb5f6b9f37b6bfa4a4dee0d3a
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9fd8ddd23793a50dbcd11c6ba51f437f1ea7d344
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a421cc7a6a001b70415aa4f66024fa6178885a14
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bdbc4ca77f5eaac15de7230814253cddfed273b1
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/03e7b2f7ae4c0ae5fb8e4e2454ba4008877f196a
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/58bfd311c93d66d8282bf21ebbf35cc3bb8ad9db
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/70aa1f2dec46b6fdb5f6b9f37b6bfa4a4dee0d3a
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9fd8ddd23793a50dbcd11c6ba51f437f1ea7d344
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a421cc7a6a001b70415aa4f66024fa6178885a14
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/bdbc4ca77f5eaac15de7230814253cddfed273b1
Impacted products
Vendor Product Version
Linux Linux Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
Version: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
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\"70aa1f2dec46b6fdb5f6b9f37b6bfa4a4dee0d3a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"9fd8ddd23793a50dbcd11c6ba51f437f1ea7d344\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"bdbc4ca77f5eaac15de7230814253cddfed273b1\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"58bfd311c93d66d8282bf21ebbf35cc3bb8ad9db\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\", \"lessThan\": \"a421cc7a6a001b70415aa4f66024fa6178885a14\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/gpu/drm/lima/lima_sched.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"unaffected\", \"version\": \"5.10.221\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.162\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.96\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.36\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/gpu/drm/lima/lima_sched.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/03e7b2f7ae4c0ae5fb8e4e2454ba4008877f196a\"}, {\"url\": \"https://git.kernel.org/stable/c/70aa1f2dec46b6fdb5f6b9f37b6bfa4a4dee0d3a\"}, {\"url\": \"https://git.kernel.org/stable/c/9fd8ddd23793a50dbcd11c6ba51f437f1ea7d344\"}, {\"url\": \"https://git.kernel.org/stable/c/bdbc4ca77f5eaac15de7230814253cddfed273b1\"}, {\"url\": \"https://git.kernel.org/stable/c/58bfd311c93d66d8282bf21ebbf35cc3bb8ad9db\"}, {\"url\": \"https://git.kernel.org/stable/c/a421cc7a6a001b70415aa4f66024fa6178885a14\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm/lima: mask irqs in timeout path before hard reset\\n\\nThere is a race condition in which a rendering job might take just long\\nenough to trigger the drm sched job timeout handler but also still\\ncomplete before the hard reset is done by the timeout handler.\\nThis runs into race conditions not expected by the timeout handler.\\nIn some very specific cases it currently may result in a refcount\\nimbalance on lima_pm_idle, with a stack dump such as:\\n\\n[10136.669170] WARNING: CPU: 0 PID: 0 at drivers/gpu/drm/lima/lima_devfreq.c:205 lima_devfreq_record_idle+0xa0/0xb0\\n...\\n[10136.669459] pc : lima_devfreq_record_idle+0xa0/0xb0\\n...\\n[10136.669628] Call trace:\\n[10136.669634]  lima_devfreq_record_idle+0xa0/0xb0\\n[10136.669646]  lima_sched_pipe_task_done+0x5c/0xb0\\n[10136.669656]  lima_gp_irq_handler+0xa8/0x120\\n[10136.669666]  __handle_irq_event_percpu+0x48/0x160\\n[10136.669679]  handle_irq_event+0x4c/0xc0\\n\\nWe can prevent that race condition entirely by masking the irqs at the\\nbeginning of the timeout handler, at which point we give up on waiting\\nfor that job entirely.\\nThe irqs will be enabled again at the next hard reset which is already\\ndone as a recovery by the timeout handler.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T09:09:17.961Z\"}}}",
         cveMetadata: "{\"cveId\": \"CVE-2024-40976\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T09:09:17.961Z\", \"dateReserved\": \"2024-07-12T12:17:45.603Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-12T12:32:12.782Z\", \"assignerShortName\": \"Linux\"}",
         dataType: "CVE_RECORD",
         dataVersion: "5.1",
      },
   },
}


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