Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c before ccce6b7ef1d7efc59ccba3421e1339c6e63a3d20; affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c before d99622e40aaa910ade681dfd4dc0fa240a011331; affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c before c845e5e05140ea1bc64a5b1107942d93c876034d; affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c before 42fb8aefffff5b458aaa66803364a16e0ea44129; affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c before d7fa2ff72ad1861eac194a4e0075d504ba8c246e; affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c before 5b6cfc6d7ff0959dd9766fdc24286a253b59ca77; affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c before f917707f0de0832b8ab582391b1f64e549995c6c; affected e126ba97dba9edeb6fafa3665b5f8497fc9cdf8c before dec47e4b0fe34afdf38caa72b4408ba95502e5de |
| Linux / Linux | affected 3.11; unaffected 0 before 3.11; unaffected 5.10.270 through 5.10.*; unaffected 5.15.221 through 5.15.*; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.110 through 6.12.*; unaffected 6.18.52 through 6.18.*; unaffected 7.2.6 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
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