Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix integer overflow of user QP buffer size set_user_buf_size() computes the QP buffer size by left-shifting the user-supplied rq.wqe_cnt and rq.wqe_shift values as signed integers. A sufficiently large rq.wqe_cnt causes signed integer overflow, which is undefined behavior, and yields a small or negative buf_size, causing ib_umem_get() to map a buffer smaller than the hardware will actually write into. Replace the shifts and addition with check_shl_overflow() and check_add_overflow(), rejecting invalid user inputs. Moreover, guard the identical shift computing qp->sq.offset in _create_user_qp() before set_user_buf_size() is reached.
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
e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to < ccce6b7ef1d7efc59ccba3421e1339c6e63a3d20affectede126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to < d99622e40aaa910ade681dfd4dc0fa240a011331affectede126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to < c845e5e05140ea1bc64a5b1107942d93c876034daffectede126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to < 42fb8aefffff5b458aaa66803364a16e0ea44129affectede126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to < d7fa2ff72ad1861eac194a4e0075d504ba8c246eaffectede126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to < 5b6cfc6d7ff0959dd9766fdc24286a253b59ca77affectede126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to < f917707f0de0832b8ab582391b1f64e549995c6caffectede126ba97dba9edeb6fafa3665b5f8497fc9cdf8c to < dec47e4b0fe34afdf38caa72b4408ba95502e5deaffected
Linux Linux
Default version status: affected
3.11affected0 to < 3.11unaffected5.10.270 to ≤ 5.10.*unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.110 to ≤ 6.12.*unaffected6.18.52 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/ccce6b7ef1d7efc59ccba3421e1339c6e63a3d20 ↗
- https://git.kernel.org/stable/c/d99622e40aaa910ade681dfd4dc0fa240a011331 ↗
- https://git.kernel.org/stable/c/c845e5e05140ea1bc64a5b1107942d93c876034d ↗
- https://git.kernel.org/stable/c/42fb8aefffff5b458aaa66803364a16e0ea44129 ↗
- https://git.kernel.org/stable/c/d7fa2ff72ad1861eac194a4e0075d504ba8c246e ↗
- https://git.kernel.org/stable/c/5b6cfc6d7ff0959dd9766fdc24286a253b59ca77 ↗
- https://git.kernel.org/stable/c/f917707f0de0832b8ab582391b1f64e549995c6c ↗
- https://git.kernel.org/stable/c/dec47e4b0fe34afdf38caa72b4408ba95502e5de ↗