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Test your applicationsUpgrade SLES:15.6
kernel-syms-azure
to version 6.4.0-150600.8.11.1 or higher.
Note: Versions mentioned in the description apply only to the upstream kernel-syms-azure
package and not the kernel-syms-azure
package as distributed by SLES
.
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for SLES:15.6
relevant fixed versions and status.
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()
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: