CVE-2022-49065
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49065
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49065.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-49065
- Downstream
- Related
- Published
- 2025-02-26T01:54:33Z
- Modified
- 2025-10-15T18:37:25.233377Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- SUNRPC: Fix the svc_deferred_event trace class
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
SUNRPC: Fix the svcdeferredevent trace class
Fix a NULL deref crash that occurs when an svcrqst is deferred while the sunrpc tracing subsystem is enabled. svcrevisit() sets dr->xprt to NULL, so it can't be relied upon in the tracepoint to provide the remote's address.
Unfortunately we can't revert the "svcdeferredclass" hunk in commit ece200ddd54b ("sunrpc: Save remote presentation address in svc_xprt for trace events") because there is now a specific check of event format specifiers for unsafe dereferences. The warning that check emits is:
event svcdeferrecv has unsafe dereference of argument 1
A "%pISpc" format specifier with a "struct sockaddr *" is indeed flagged by this check.
Instead, take the brute-force approach used by the svcrdmaqperror tracepoint. Convert the dr::addr field into a presentation address in the TPfastassign() arm of the trace event, and store that as a string. This fix can be backported to -stable kernels.
In the meantime, commit c6ced22997ad ("tracing: Update print fmt check to handle new _getsockaddr() macro") is now in v5.18, so this wonky fix can be replaced with __sockaddr() and friends properly during the v5.19 merge window.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/4d5004451ab2218eab94a30e1841462c9316ba19
- https://git.kernel.org/stable/c/726ae7300fcc25fefa46d188cc07eb16dc908f9e
- https://git.kernel.org/stable/c/85ee17ca21cf92989e8c923e3ea4514c291e9d38
- https://git.kernel.org/stable/c/c2456f470eea3bd06574d988bf6089e7c3f4c5cc
Affected packages
Git / 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
-
Introducedece200ddd54b9ce840cfee554fb812560c545c7dFixed85ee17ca21cf92989e8c923e3ea4514c291e9d38
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedece200ddd54b9ce840cfee554fb812560c545c7dFixed726ae7300fcc25fefa46d188cc07eb16dc908f9e
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedece200ddd54b9ce840cfee554fb812560c545c7dFixedc2456f470eea3bd06574d988bf6089e7c3f4c5cc
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedece200ddd54b9ce840cfee554fb812560c545c7dFixed4d5004451ab2218eab94a30e1841462c9316ba19