Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix error path fall-through in mlx5_ib_dev_res_srq_init() mlx5_ib_dev_res_srq_init() allocates two SRQs, s0 and s1. When ib_create_srq() fails for s1, the error branch destroys s0 but falls through and unconditionally assigns the freed s0 and the ERR_PTR s1 to devr->s0 and devr->s1. This leads to several problems: the lock-free fast path checks "if (devr->s1) return 0;" and treats the ERR_PTR as already initialised; users in mlx5_ib_create_qp() dereference the freed SRQ or ERR_PTR via to_msrq(devr->s0)->msrq.srqn; and mlx5_ib_dev_res_cleanup() dereferences the ERR_PTR and double-frees s0 on teardown. Fix by adding the same `goto unlock` in the s1 failure path.
Product status
b6334d2356fc0922ed01457960f74923058a353a (git) before a13c2ac4d480b734342c6fbf8249fc48afd675f3
5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 (git) before bc2cf5935b4665172235341163315905197ae91d
5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 (git) before b087913ae88256df66620f7ba0a9776716aeef7e
5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 (git) before 6fd93142dd1d09000c3750af08270f5792523fe9
5895e70f2e6e8dc67b551ca554d6fcde0a7f0467 (git) before c488df06bd552bb8b6e14fa0cfd5ad986c6e9525
6.6.64 (semver) before 6.6.140
6.11
Any version before 6.11
6.6.140 (semver)
6.12.88 (semver)
6.18.30 (semver)
7.0.7 (semver)
7.1-rc3 (original_commit_for_fix)
References
git.kernel.org/...c/a13c2ac4d480b734342c6fbf8249fc48afd675f3
git.kernel.org/...c/bc2cf5935b4665172235341163315905197ae91d
git.kernel.org/...c/b087913ae88256df66620f7ba0a9776716aeef7e
git.kernel.org/...c/6fd93142dd1d09000c3750af08270f5792523fe9
git.kernel.org/...c/c488df06bd552bb8b6e14fa0cfd5ad986c6e9525