Bug 1225115 (CVE-2023-52797)

Summary: VUL-0: CVE-2023-52797: kernel: drivers: perf: Check find_first_bit() return value
Product: [Novell Products] SUSE Security Incidents Reporter: SMASH SMASH <smash_bz>
Component: IncidentsAssignee: Security Team bot <security-team>
Status: RESOLVED INVALID QA Contact: Security Team bot <security-team>
Severity: Normal    
Priority: P3 - Medium CC: carlos.lopez, gabriel.bertazi, tiwai
Version: unspecified   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/407083/
Whiteboard: CVSSv3.1:SUSE:CVE-2023-52797:6.1:(AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H)
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description SMASH SMASH 2024-05-23 11:13:14 UTC 
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 ]---

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2023-52797
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2023/CVE-2023-52797.mbox
https://git.kernel.org/stable/c/2c86b24095fcf72cf51bc72d12e4350163b4e11d
https://git.kernel.org/stable/c/45a0de41ec383c8b7c6d442734ba3852dd2fc4a7
https://git.kernel.org/stable/c/c6e316ac05532febb0c966fa9b55f5258ed037be
https://www.cve.org/CVERecord?id=CVE-2023-52797
Comment 1 Gabriel Krisman Bertazi 2024-05-24 20:07:25 UTC 
This is RISC-V specific, which we don't build, so I consider it a NOP.  CC'ing Takashi for awareness and returning to security team.

For the record:

[0:krisman@cartola kernel-source]$ ../scripts/scripts/check-kernel-fix -r -s 6.1 CVE-2023-52797
c6e316ac0553 ("drivers: perf: Check find_first_bit() return value") merged v6.7-rc1~21^2~3
Fixes: 4905ec2fb7e6 ("RISC-V: Add sscofpmf extension support") merged v5.18-rc1~121^2~1^2~2
Security fix for CVE-2023-52797 bsc#1225115 with CVSS 6.1
Experts candidates: tiwai@suse.de
..............................
ACTION NEEDED!
SLE15-SP6: MANUAL: backport c6e316ac05532febb0c966fa9b55f5258ed037be (Fixes 4905ec2fb7e6)
Comment 2 Carlos López 2024-05-27 09:50:50 UTC 
Nothing to do, closing.