Description
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
Details
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| linux | — | 6.8.0-38.38 |
| linux-allwinner-5.19 | — | — |
| linux-aws | — | 6.8.0-1011.12 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | — |
| linux-aws-5.15 | — | 5.15.0-1065.71~20.04.1 |
| linux-aws-5.19 | — | — |
| linux-aws-5.3 | — | — |
| linux-aws-5.8 | — | — |
| linux-aws-6.2 | — | — |
| linux-aws-6.8 | — | 6.8.0-1011.12~22.04.1 |
| linux-aws-fips | — | 5.15.0-1065.71+fips1 |
| linux-azure | — | 6.8.0-1010.10 |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | — |
| linux-azure-5.15 | — | 5.15.0-1068.77~20.04.1 |
| linux-azure-5.19 | — | — |
| linux-azure-5.3 | — | — |
| linux-azure-5.8 | — | — |
| linux-azure-6.2 | — | — |
| linux-azure-6.8 | — | 6.8.0-1010.10~22.04.1 |
| linux-azure-edge | — | — |
| linux-azure-fde | — | 5.15.0-1068.77.1 |
| linux-azure-fde-5.15 | — | 5.15.0-1068.77~20.04.1.1 |
| linux-azure-fde-5.19 | — | — |
| linux-azure-fde-6.2 | — | — |
| linux-azure-fips | — | 5.15.0-1068.77+fips1 |
| linux-bluefield | — | 5.15.0-1047.49 |
| linux-fips | — | 5.15.0-115.125+fips1 |
| linux-gcp | — | 6.8.0-1010.11 |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | — |
| linux-gcp-5.15 | — | 5.15.0-1065.73~20.04.1 |
| linux-gcp-5.19 | — | — |
| linux-gcp-5.3 | — | — |
| linux-gcp-5.8 | — | — |
| linux-gcp-6.2 | — | — |
| linux-gcp-fips | — | 5.15.0-1064.72+fips1 |
| linux-gke | — | 6.8.0-1006.9 |
| linux-gke-4.15 | — | — |
| linux-gke-5.15 | — | — |
| linux-gke-5.4 | — | — |
| linux-gkeop | — | 5.15.0-1048.55 |
| linux-gkeop-5.15 | — | 5.15.0-1048.55~20.04.1 |
| linux-gkeop-5.4 | — | — |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | — |
| linux-hwe-5.15 | — | 5.15.0-116.126~20.04.1 |
| linux-hwe-5.19 | — | — |
| linux-hwe-5.8 | — | — |
| linux-hwe-6.2 | — | — |
| linux-hwe-edge | — | — |
| linux-ibm | — | 6.8.0-1008.8 |
| linux-ibm-5.15 | — | 5.15.0-1058.61~20.04.1 |
| linux-intel | — | 6.8.0-1007.14 |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | 5.15.0-1058.60 |
| linux-intel-iotg | — | 5.15.0-1060.66 |
| linux-intel-iotg-5.15 | — | 5.15.0-1060.66~20.04.1 |
| linux-kvm | — | 5.15.0-1062.67 |
| linux-lowlatency | — | 6.8.0-38.38.1 |
| linux-lowlatency-hwe-5.15 | — | 5.15.0-116.126~20.04.1 |
| linux-lowlatency-hwe-5.19 | — | — |
| linux-lowlatency-hwe-6.2 | — | — |
| linux-nvidia | — | 6.8.0-1009.9 |
| linux-nvidia-6.2 | — | — |
| linux-nvidia-6.8 | — | 6.8.0-1009.9~22.04.1 |
| linux-oem | — | — |
| linux-oem-5.10 | — | — |
| linux-oem-5.13 | — | — |
| linux-oem-5.14 | — | — |
| linux-oem-5.17 | — | — |
| linux-oem-5.6 | — | — |
| linux-oem-6.0 | — | — |
| linux-oem-6.1 | — | — |
| linux-oem-6.8 | — | 6.8.0-1008.8 |
| linux-oracle | — | 6.8.0-1008.8 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | — |
| linux-oracle-5.15 | — | 5.15.0-1063.69~20.04.1 |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.8 | — | — |
| linux-oracle-6.8 | — | 6.8.0-1008.8~22.04.1 |
| linux-raspi | — | 6.8.0-1007.7 |
| linux-raspi-realtime | — | 6.8.0-2006.6 |
| linux-raspi2 | — | — |
| linux-realtime | — | 6.8.1-1004.4 |
| linux-riscv | — | 6.8.0-38.38.1 |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.15 | — | 5.15.0-1061.65~20.04.1 |
| linux-riscv-5.19 | — | — |
| linux-riscv-5.8 | — | — |
| linux-starfive-5.19 | — | — |
| linux-starfive-6.2 | — | — |
| linux-xilinx-zynqmp | — | 5.15.0-1035.39 |
References
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