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CVE PROGRAM SOURCE RECORDUnscored

CVE-2024-35902

net/rds: fix possible cp null dereference

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Status
Published
Published
Updated
Assigning organization
Linux

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

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 786854141057751bc08eb26f1b02e97c1631c8f4 to < d275de8ea7be3a453629fddae41d4156762e814caffected
  • 997efea2bf3a4adb96c306b9ad6a91442237bf5b to < bcd46782e2ec3825d10c1552fcb674d491cc09f9affected
  • 9dfc15a10dfd44f8ff7f27488651cb5be6af83c2 to < cfb786b03b03c5ff38882bee38525eb9987e4d14affected
  • b562ebe21ed9adcf42242797dd6cb75beef12bf0 to < d49fac38479bfdaec52b3ea274d290c47a294029affected
  • 998fd719e6d6468b930ac0c44552ea9ff8b07b80 to < cbaac2e5488ed54833897264a5ffb2a341a9f196affected
  • 2b505d05280739ce31d5708da840f42df827cb85 to < 92309bed3c5fbe2ccd4c45056efd42edbd06162daffected
  • c055fc00c07be1f0df7375ab0036cebd1106ed38 to < 6794090c742008c53b344b35b021d4a3093dc50aaffected
  • c055fc00c07be1f0df7375ab0036cebd1106ed38 to < 62fc3357e079a07a22465b9b6ef71bb6ea75ee4baffected
  • 907761307469adecb02461a14120e9a1812a5fb1affected
  • 4.19.310 to < 4.19.312affected
  • 5.4.272 to < 5.4.274affected
  • 5.10.213 to < 5.10.215affected
  • 5.15.152 to < 5.15.154affected
  • 6.1.82 to < 6.1.85affected
  • 6.6.22 to < 6.6.26affected
  • 6.7.10 to < 6.8affected

Linux Linux

Default version status: affected

  • 6.8affected
  • 0 to < 6.8unaffected
  • 4.19.312 to ≤ 4.19.*unaffected
  • 5.4.274 to ≤ 5.4.*unaffected
  • 5.10.215 to ≤ 5.10.*unaffected
  • 5.15.154 to ≤ 5.15.*unaffected
  • 6.1.85 to ≤ 6.1.*unaffected
  • 6.6.26 to ≤ 6.6.*unaffected
  • 6.8.5 to ≤ 6.8.*unaffected
  • 6.9 to ≤ *unaffected

References