Description
In the Linux kernel, the following vulnerability has been resolved: mlxsw: fix refcount leak in mlxsw_sp_vrs_lpm_tree_replace() When mlxsw_sp_vrs_lpm_tree_replace() fails after replacing some VRs, the error rollback loop does not correctly revert the preceding replacements. The loop decrements the index but fails to update the vr pointer, which still points to the VR that caused the failure. As a result, the condition and the rollback call always operate on the same VR, potentially calling mlxsw_sp_vr_lpm_tree_replace() multiple times on it while never rolling back the earlier VRs. Those VRs continue to hold a reference to new_tree acquired via mlxsw_sp_lpm_tree_hold(), leaking the reference count of new_tree. Fix by reinitializing vr inside the error loop with the updated index: vr = &mlxsw_sp->router->vrs[i]; so that the loop correctly iterates over all VRs that were actually replaced.
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
fc922bb0dd9406dd9897fd47df958789891c380e to < c2c75c45b54f3b12eafb28a4eb47f8821512c1aaaffectedfc922bb0dd9406dd9897fd47df958789891c380e to < 7203ac71d3895fa5948b319dd724f0e1cffbc4a1affectedfc922bb0dd9406dd9897fd47df958789891c380e to < f6454a5fbf2224ad30ec70e686a6c592561da1f2affectedfc922bb0dd9406dd9897fd47df958789891c380e to < 220d41bdce41fe5a39a7f419faab1e907b4093c2affectedfc922bb0dd9406dd9897fd47df958789891c380e to < 9e4a6185679922305ea1df68403f00ccc512656baffectedfc922bb0dd9406dd9897fd47df958789891c380e to < 3a2b47d1b4b3de54d030a7fdb6a322c970513ee3affectedfc922bb0dd9406dd9897fd47df958789891c380e to < 8adebf07b46df79a0e49a6d4ae384f0db7c91db6affectedfc922bb0dd9406dd9897fd47df958789891c380e to < 21cf8dc478a49e8de039c2739b1646a774cb1944affected
Linux Linux
Default version status: affected
4.14affected0 to < 4.14unaffected5.10.261 to ≤ 5.10.*unaffected5.15.212 to ≤ 5.15.*unaffected6.1.178 to ≤ 6.1.*unaffected6.6.145 to ≤ 6.6.*unaffected6.12.97 to ≤ 6.12.*unaffected6.18.40 to ≤ 6.18.*unaffected7.1.5 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/c2c75c45b54f3b12eafb28a4eb47f8821512c1aa ↗
- https://git.kernel.org/stable/c/7203ac71d3895fa5948b319dd724f0e1cffbc4a1 ↗
- https://git.kernel.org/stable/c/f6454a5fbf2224ad30ec70e686a6c592561da1f2 ↗
- https://git.kernel.org/stable/c/220d41bdce41fe5a39a7f419faab1e907b4093c2 ↗
- https://git.kernel.org/stable/c/9e4a6185679922305ea1df68403f00ccc512656b ↗
- https://git.kernel.org/stable/c/3a2b47d1b4b3de54d030a7fdb6a322c970513ee3 ↗
- https://git.kernel.org/stable/c/8adebf07b46df79a0e49a6d4ae384f0db7c91db6 ↗
- https://git.kernel.org/stable/c/21cf8dc478a49e8de039c2739b1646a774cb1944 ↗