{"id":"CVE-2023-52797","summary":"drivers: perf: Check find_first_bit() return value","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: perf: Check find_first_bit() return value\n\nWe must check the return value of find_first_bit() before using the\nreturn value as an index array since it happens to overflow the array\nand then panic:\n\n[  107.318430] Kernel BUG [#1]\n[  107.319434] CPU: 3 PID: 1238 Comm: kill Tainted: G            E      6.6.0-rc6ubuntu-defconfig #2\n[  107.319465] Hardware name: riscv-virtio,qemu (DT)\n[  107.319551] epc : pmu_sbi_ovf_handler+0x3a4/0x3ae\n[  107.319840]  ra : pmu_sbi_ovf_handler+0x52/0x3ae\n[  107.319868] epc : ffffffff80a0a77c ra : ffffffff80a0a42a sp : ffffaf83fecda350\n[  107.319884]  gp : ffffffff823961a8 tp : ffffaf8083db1dc0 t0 : ffffaf83fecda480\n[  107.319899]  t1 : ffffffff80cafe62 t2 : 000000000000ff00 s0 : ffffaf83fecda520\n[  107.319921]  s1 : ffffaf83fecda380 a0 : 00000018fca29df0 a1 : ffffffffffffffff\n[  107.319936]  a2 : 0000000001073734 a3 : 0000000000000004 a4 : 0000000000000000\n[  107.319951]  a5 : 0000000000000040 a6 : 000000001d1c8774 a7 : 0000000000504d55\n[  107.319965]  s2 : ffffffff82451f10 s3 : ffffffff82724e70 s4 : 000000000000003f\n[  107.319980]  s5 : 0000000000000011 s6 : ffffaf8083db27c0 s7 : 0000000000000000\n[  107.319995]  s8 : 0000000000000001 s9 : 00007fffb45d6558 s10: 00007fffb45d81a0\n[  107.320009]  s11: ffffaf7ffff60000 t3 : 0000000000000004 t4 : 0000000000000000\n[  107.320023]  t5 : ffffaf7f80000000 t6 : ffffaf8000000000\n[  107.320037] status: 0000000200000100 badaddr: 0000000000000000 cause: 0000000000000003\n[  107.320081] [\u003cffffffff80a0a77c\u003e] pmu_sbi_ovf_handler+0x3a4/0x3ae\n[  107.320112] [\u003cffffffff800b42d0\u003e] handle_percpu_devid_irq+0x9e/0x1a0\n[  107.320131] [\u003cffffffff800ad92c\u003e] generic_handle_domain_irq+0x28/0x36\n[  107.320148] [\u003cffffffff8065f9f8\u003e] riscv_intc_irq+0x36/0x4e\n[  107.320166] [\u003cffffffff80caf4a0\u003e] handle_riscv_irq+0x54/0x86\n[  107.320189] [\u003cffffffff80cb0036\u003e] do_irq+0x64/0x96\n[  107.320271] Code: 85a6 855e b097 ff7f 80e7 9220 b709 9002 4501 bbd9 (9002) 6097\n[  107.320585] ---[ end trace 0000000000000000 ]---\n[  107.320704] Kernel panic - not syncing: Fatal exception in interrupt\n[  107.320775] SMP: stopping secondary CPUs\n[  107.321219] Kernel Offset: 0x0 from 0xffffffff80000000\n[  107.333051] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]---","modified":"2026-04-02T09:43:20.904999Z","published":"2024-05-21T15:31:10.952Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52797.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2c86b24095fcf72cf51bc72d12e4350163b4e11d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/45a0de41ec383c8b7c6d442734ba3852dd2fc4a7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c6e316ac05532febb0c966fa9b55f5258ed037be"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/52xxx/CVE-2023-52797.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-52797"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98"},{"fixed":"2c86b24095fcf72cf51bc72d12e4350163b4e11d"},{"fixed":"45a0de41ec383c8b7c6d442734ba3852dd2fc4a7"},{"fixed":"c6e316ac05532febb0c966fa9b55f5258ed037be"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2023-52797.json"}}],"schema_version":"1.7.5"}