Description
In the Linux kernel, the following vulnerability has been resolved: soc: fsl: qbman: fix race condition in qman_destroy_fq When QMAN_FQ_FLAG_DYNAMIC_FQID is set, there's a race condition between fq_table[fq->idx] state and freeing/allocating from the pool and WARN_ON(fq_table[fq->idx]) in qman_create_fq() gets triggered. Indeed, we can have: Thread A Thread B qman_destroy_fq() qman_create_fq() qman_release_fqid() qman_shutdown_fq() gen_pool_free() -- At this point, the fqid is available again -- qman_alloc_fqid() -- so, we can get the just-freed fqid in thread B -- fq->fqid = fqid; fq->idx = fqid * 2; WARN_ON(fq_table[fq->idx]); fq_table[fq->idx] = fq; fq_table[fq->idx] = NULL; And adding some logs between qman_release_fqid() and fq_table[fq->idx] = NULL makes the WARN_ON() trigger a lot more. To prevent that, ensure that fq_table[fq->idx] is set to NULL before gen_pool_free() is called by using smp_wmb().
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
c535e923bb97a4b361e89a6383693482057f8b0c to < 66442cf9989bd4489fa80d9f37637d58ab016835affectedc535e923bb97a4b361e89a6383693482057f8b0c to < d288fbe652ef43b7128e4bc0c0c2ef6bd03a2210affectedc535e923bb97a4b361e89a6383693482057f8b0c to < 9e3d47904b8153c8c3ad2f9b66d5008aad677aa8affectedc535e923bb97a4b361e89a6383693482057f8b0c to < d21923a8059fa896bfef016f55dd769299335cb4affectedc535e923bb97a4b361e89a6383693482057f8b0c to < 751f60bd48edaf03f9d84ab09e5ce6705757d50faffectedc535e923bb97a4b361e89a6383693482057f8b0c to < 85dbbf7dc88b0a54f2e334daedf6f3f31fd004faaffectedc535e923bb97a4b361e89a6383693482057f8b0c to < 265e56714635c5dd1e5964bfd97fa6e73f62cde5affectedc535e923bb97a4b361e89a6383693482057f8b0c to < 014077044e874e270ec480515edbc1cadb976cf2affected
Linux Linux
Default version status: affected
4.9affected0 to < 4.9unaffected5.10.253 to ≤ 5.10.*unaffected5.15.203 to ≤ 5.15.*unaffected6.1.167 to ≤ 6.1.*unaffected6.6.130 to ≤ 6.6.*unaffected6.12.78 to ≤ 6.12.*unaffected6.18.20 to ≤ 6.18.*unaffected6.19.10 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/66442cf9989bd4489fa80d9f37637d58ab016835 ↗
- https://git.kernel.org/stable/c/d288fbe652ef43b7128e4bc0c0c2ef6bd03a2210 ↗
- https://git.kernel.org/stable/c/9e3d47904b8153c8c3ad2f9b66d5008aad677aa8 ↗
- https://git.kernel.org/stable/c/d21923a8059fa896bfef016f55dd769299335cb4 ↗
- https://git.kernel.org/stable/c/751f60bd48edaf03f9d84ab09e5ce6705757d50f ↗
- https://git.kernel.org/stable/c/85dbbf7dc88b0a54f2e334daedf6f3f31fd004fa ↗
- https://git.kernel.org/stable/c/265e56714635c5dd1e5964bfd97fa6e73f62cde5 ↗
- https://git.kernel.org/stable/c/014077044e874e270ec480515edbc1cadb976cf2 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html ↗