| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2023-52797: drivers: perf: Check find_first_bit() return value |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drivers: perf: Check find_first_bit() return value |
| |
| We must check the return value of find_first_bit() before using the |
| return value as an index array since it happens to overflow the array |
| and then panic: |
| |
| [ 107.318430] Kernel BUG [#1] |
| [ 107.319434] CPU: 3 PID: 1238 Comm: kill Tainted: G E 6.6.0-rc6ubuntu-defconfig #2 |
| [ 107.319465] Hardware name: riscv-virtio,qemu (DT) |
| [ 107.319551] epc : pmu_sbi_ovf_handler+0x3a4/0x3ae |
| [ 107.319840] ra : pmu_sbi_ovf_handler+0x52/0x3ae |
| [ 107.319868] epc : ffffffff80a0a77c ra : ffffffff80a0a42a sp : ffffaf83fecda350 |
| [ 107.319884] gp : ffffffff823961a8 tp : ffffaf8083db1dc0 t0 : ffffaf83fecda480 |
| [ 107.319899] t1 : ffffffff80cafe62 t2 : 000000000000ff00 s0 : ffffaf83fecda520 |
| [ 107.319921] s1 : ffffaf83fecda380 a0 : 00000018fca29df0 a1 : ffffffffffffffff |
| [ 107.319936] a2 : 0000000001073734 a3 : 0000000000000004 a4 : 0000000000000000 |
| [ 107.319951] a5 : 0000000000000040 a6 : 000000001d1c8774 a7 : 0000000000504d55 |
| [ 107.319965] s2 : ffffffff82451f10 s3 : ffffffff82724e70 s4 : 000000000000003f |
| [ 107.319980] s5 : 0000000000000011 s6 : ffffaf8083db27c0 s7 : 0000000000000000 |
| [ 107.319995] s8 : 0000000000000001 s9 : 00007fffb45d6558 s10: 00007fffb45d81a0 |
| [ 107.320009] s11: ffffaf7ffff60000 t3 : 0000000000000004 t4 : 0000000000000000 |
| [ 107.320023] t5 : ffffaf7f80000000 t6 : ffffaf8000000000 |
| [ 107.320037] status: 0000000200000100 badaddr: 0000000000000000 cause: 0000000000000003 |
| [ 107.320081] [<ffffffff80a0a77c>] pmu_sbi_ovf_handler+0x3a4/0x3ae |
| [ 107.320112] [<ffffffff800b42d0>] handle_percpu_devid_irq+0x9e/0x1a0 |
| [ 107.320131] [<ffffffff800ad92c>] generic_handle_domain_irq+0x28/0x36 |
| [ 107.320148] [<ffffffff8065f9f8>] riscv_intc_irq+0x36/0x4e |
| [ 107.320166] [<ffffffff80caf4a0>] handle_riscv_irq+0x54/0x86 |
| [ 107.320189] [<ffffffff80cb0036>] do_irq+0x64/0x96 |
| [ 107.320271] Code: 85a6 855e b097 ff7f 80e7 9220 b709 9002 4501 bbd9 (9002) 6097 |
| [ 107.320585] ---[ end trace 0000000000000000 ]--- |
| [ 107.320704] Kernel panic - not syncing: Fatal exception in interrupt |
| [ 107.320775] SMP: stopping secondary CPUs |
| [ 107.321219] Kernel Offset: 0x0 from 0xffffffff80000000 |
| [ 107.333051] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]--- |
| |
| The Linux kernel CVE team has assigned CVE-2023-52797 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.18 with commit 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 and fixed in 6.5.13 with commit 2c86b24095fcf72cf51bc72d12e4350163b4e11d |
| Issue introduced in 5.18 with commit 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 and fixed in 6.6.3 with commit 45a0de41ec383c8b7c6d442734ba3852dd2fc4a7 |
| Issue introduced in 5.18 with commit 4905ec2fb7e6421c14c9fb7276f5aa92f60f2b98 and fixed in 6.7 with commit c6e316ac05532febb0c966fa9b55f5258ed037be |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2023-52797 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/perf/riscv_pmu_sbi.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/2c86b24095fcf72cf51bc72d12e4350163b4e11d |
| https://git.kernel.org/stable/c/45a0de41ec383c8b7c6d442734ba3852dd2fc4a7 |
| https://git.kernel.org/stable/c/c6e316ac05532febb0c966fa9b55f5258ed037be |
