CVE - CVE-2022-48713

CVE-ID
CVE-2022-48713	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/1d9093457b243061a9bba23543c38726e864a643 URL:https://git.kernel.org/stable/c/1d9093457b243061a9bba23543c38726e864a643 MISC:https://git.kernel.org/stable/c/456f041e035913fcedb275aff6f8a71dfebcd394 URL:https://git.kernel.org/stable/c/456f041e035913fcedb275aff6f8a71dfebcd394 MISC:https://git.kernel.org/stable/c/e83d941fd3445f660d2f43647c580a320cc384f6 URL:https://git.kernel.org/stable/c/e83d941fd3445f660d2f43647c580a320cc384f6 MISC:https://git.kernel.org/stable/c/feffb6ae2c80b9a8206450cdef90f5943baced99 URL:https://git.kernel.org/stable/c/feffb6ae2c80b9a8206450cdef90f5943baced99
Assigning CNA
kernel.org
Date Record Created
20240620	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240620)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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