| Summary: |
VUL-0: CVE-2022-48713: kernel: perf/x86/intel/pt: Fix crash with stop filters in single-range mode |
| Product: |
[Novell Products] SUSE Security Incidents
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Reporter: |
SMASH SMASH <smash_bz> |
| Component: |
Incidents | Assignee: |
Security Team bot <security-team> |
| Status: |
NEW
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QA Contact: |
Security Team bot <security-team> |
| Severity: |
Normal
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| Priority: |
P3 - Medium
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CC: |
gianluca.gabrielli, mkoutny
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| Version: |
unspecified | |
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| Target Milestone: |
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| Hardware: |
Other | |
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| OS: |
Other | |
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| URL: |
https://smash.suse.de/issue/411547/
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| Whiteboard: |
CVSSv3.1:SUSE:CVE-2022-48713:4.4:(AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H) |
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Found By:
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Security Response Team
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Services Priority:
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Business Priority:
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Blocker:
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Marketing QA Status:
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IT Deployment:
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In the Linux kernel, the following vulnerability has been resolved: perf/x86/intel/pt: Fix crash with stop filters in single-range mode Add a check for !buf->single before calling pt_buffer_region_size in a place where a missing check can cause a kernel crash. Fixes a bug introduced by commit 670638477aed ("perf/x86/intel/pt: Opportunistically use single range output mode"), which added a support for PT single-range output mode. Since that commit if a PT stop filter range is hit while tracing, the kernel will crash because of a null pointer dereference in pt_handle_status due to calling pt_buffer_region_size without a ToPA configured. The commit which introduced single-range mode guarded almost all uses of the ToPA buffer variables with checks of the buf->single variable, but missed the case where tracing was stopped by the PT hardware, which happens when execution hits a configured stop filter. Tested that hitting a stop filter while PT recording successfully records a trace with this patch but crashes without this patch. References: http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2022-48713 https://www.cve.org/CVERecord?id=CVE-2022-48713 https://git.kernel.org/stable/c/1d9093457b243061a9bba23543c38726e864a643 https://git.kernel.org/stable/c/456f041e035913fcedb275aff6f8a71dfebcd394 https://git.kernel.org/stable/c/e83d941fd3445f660d2f43647c580a320cc384f6 https://git.kernel.org/stable/c/feffb6ae2c80b9a8206450cdef90f5943baced99 https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2022/CVE-2022-48713.mbox https://bugzilla.redhat.com/show_bug.cgi?id=2293289