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CVE-2024-35902

net/rds: fix possible cp null dereference PUBLISHED

Description (CNA)

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

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 786854141057751bc08eb26f1b02e97c1631c8f4 before d275de8ea7be3a453629fddae41d4156762e814c; affected 997efea2bf3a4adb96c306b9ad6a91442237bf5b before bcd46782e2ec3825d10c1552fcb674d491cc09f9; affected 9dfc15a10dfd44f8ff7f27488651cb5be6af83c2 before cfb786b03b03c5ff38882bee38525eb9987e4d14; affected b562ebe21ed9adcf42242797dd6cb75beef12bf0 before d49fac38479bfdaec52b3ea274d290c47a294029; affected 998fd719e6d6468b930ac0c44552ea9ff8b07b80 before cbaac2e5488ed54833897264a5ffb2a341a9f196; affected 2b505d05280739ce31d5708da840f42df827cb85 before 92309bed3c5fbe2ccd4c45056efd42edbd06162d; affected c055fc00c07be1f0df7375ab0036cebd1106ed38 before 6794090c742008c53b344b35b021d4a3093dc50a; affected c055fc00c07be1f0df7375ab0036cebd1106ed38 before 62fc3357e079a07a22465b9b6ef71bb6ea75ee4b; affected 907761307469adecb02461a14120e9a1812a5fb1; affected 4.19.310 before 4.19.312; affected 5.4.272 before 5.4.274; affected 5.10.213 before 5.10.215; affected 5.15.152 before 5.15.154; affected 6.1.82 before 6.1.85; affected 6.6.22 before 6.6.26; affected 6.7.10 before 6.8
Linux / Linuxaffected 6.8; unaffected 0 before 6.8; unaffected 4.19.312 through 4.19.*; unaffected 5.4.274 through 5.4.*; unaffected 5.10.215 through 5.10.*; unaffected 5.15.154 through 5.15.*; unaffected 6.1.85 through 6.1.*; unaffected 6.6.26 through 6.6.*; unaffected 6.8.5 through 6.8.*; unaffected 6.9 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

CVE

No English description supplied.

siemens-SADP

No English description supplied.