In the Linux kernel, the following vulnerability has been resolved:
net/rds: fix possible cp null dereference
cp might be null, calling cp->cp_conn would produce null dereference
[Simon Horman adds:]
Analysis:
* cp is a parameter of __rds_rdma_map and is not reassigned.
* The following call-sites pass a NULL cp argument to __rds_rdma_map()
- rds_get_mr()
- rds_get_mr_for_dest
* Prior to the code above, the following assumes that cp may be NULL
(which is indicative, but could itself be unnecessary)
trans_private = rs->rs_transport->get_mr(
sg, nents, rs, &mr->r_key, cp ? cp->cp_conn : NULL,
args->vec.addr, args->vec.bytes,
need_odp ? ODP_ZEROBASED : ODP_NOT_NEEDED);
* The code modified by this patch is guarded by IS_ERR(trans_private),
where trans_private is assigned as per the previous point in this analysis.
The only implementation of get_mr that I could locate is rds_ib_get_mr()
which can return an ERR_PTR if the conn (4th) argument is NULL.
* ret is set to PTR_ERR(trans_private).
rds_ib_get_mr can return ERR_PTR(-ENODEV) if the conn (4th) argument is NULL.
Thus ret may be -ENODEV in which case the code in question will execute.
Conclusion:
* cp may be NULL at the point where this patch adds a check;
this patch does seem to address a possible bug
Metrics
Affected Vendors & Products
References
History
Mon, 30 Dec 2024 20:15:00 +0000
Type | Values Removed | Values Added |
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First Time appeared |
Debian
Debian debian Linux Linux Linux linux Kernel |
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Weaknesses | CWE-476 | |
CPEs | cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.9:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.9:rc2:*:*:*:*:*:* |
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Vendors & Products |
Debian
Debian debian Linux Linux Linux linux Kernel |
Fri, 22 Nov 2024 12:00:00 +0000
Type | Values Removed | Values Added |
---|---|---|
References |
|
Tue, 05 Nov 2024 10:45:00 +0000
Type | Values Removed | Values Added |
---|---|---|
References |
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MITRE
Status: PUBLISHED
Assigner: Linux
Published: 2024-05-19T08:34:55.692Z
Updated: 2024-12-19T08:57:54.552Z
Reserved: 2024-05-17T13:50:33.114Z
Link: CVE-2024-35902
Vulnrichment
Updated: 2024-08-02T03:21:48.670Z
NVD
Status : Analyzed
Published: 2024-05-19T09:15:11.037
Modified: 2024-12-30T19:47:46.853
Link: CVE-2024-35902
Redhat