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La funci\u00f3n msm_disp_state_print_regs() _s\u00ed_ tiene c\u00f3digo para intentar manejarlo con: if (*reg) dump_addr = *reg; ...pero como \"dump_addr\" se inicializa a NULL, lo anterior es en realidad un noop. Luego, el c\u00f3digo contin\u00faa para desreferenciar `dump_addr`. Haga que la funci\u00f3n imprima \"Registros no almacenados\" cuando vea un NULL para resolver esto. Ya que estamos tocando el c\u00f3digo, arregle msm_disp_state_print_regs() para que no tome un puntero doble sin sentido y marque correctamente el puntero como `const`. 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{"bugzilla": {"description": "kernel: drm/msm: Avoid NULL dereference in msm_disp_state_print_regs()", "id": "2324417", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2324417"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/msm: Avoid NULL dereference in msm_disp_state_print_regs()\nIf the allocation in msm_disp_state_dump_regs() failed then\n`block->state` can be NULL. The msm_disp_state_print_regs() function\n_does_ have code to try to handle it with:\nif (*reg)\ndump_addr = *reg;\n...but since \"dump_addr\" is initialized to NULL the above is actually\na noop. The code then goes on to dereference `dump_addr`.\nMake the function print \"Registers not stored\" when it sees a NULL to\nsolve this. Since we're touching the code, fix\nmsm_disp_state_print_regs() not to pointlessly take a double-pointer\nand properly mark the pointer as `const`.\nPatchwork: https://patchwork.freedesktop.org/patch/619657/"], "name": "CVE-2024-50156", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-11-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50156\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50156\nhttps://lore.kernel.org/linux-cve-announce/2024110746-CVE-2024-50156-6878@gregkh/T"], "threat_severity": "Moderate"}