Description
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix error path in multi-packet WQE transmit Remove the erroneous unmap in case no DMA mapping was established The multi-packet WQE transmit code attempts to obtain a DMA mapping for the skb. This could fail, e.g. under memory pressure, when the IOMMU driver just can't allocate more memory for page tables. While the code tries to handle this in the path below the err_unmap label it erroneously unmaps one entry from the sq's FIFO list of active mappings. Since the current map attempt failed this unmap is removing some random DMA mapping that might still be required. If the PCI function now presents that IOVA, the IOMMU may assumes a rogue DMA access and e.g. on s390 puts the PCI function in error state. The erroneous behavior was seen in a stress-test environment that created memory pressure.
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
5af75c747e2a868abbf8611494b50ed5e076fca7 to < ca36d6c1a49b6965c86dd528a73f38bc62d9c625affected5af75c747e2a868abbf8611494b50ed5e076fca7 to < ce828b347cf1b3c1b12b091d02463c35ce5097f5affected5af75c747e2a868abbf8611494b50ed5e076fca7 to < fc357e78176945ca7bcacf92ab794b9ccd41b4f4affected5af75c747e2a868abbf8611494b50ed5e076fca7 to < 26fad69b34fcba80d5c7d9e651f628e6ac927754affected5af75c747e2a868abbf8611494b50ed5e076fca7 to < ecf310aaf256acbc8182189fe0aa1021c3ddef72affected5af75c747e2a868abbf8611494b50ed5e076fca7 to < 8bb8c12fb5e2b1f03d603d493c92941676f109b5affected5af75c747e2a868abbf8611494b50ed5e076fca7 to < 2bcae12c795f32ddfbf8c80d1b5f1d3286341c32affected
Linux Linux
Default version status: affected
5.10affected0 to < 5.10unaffected5.10.227 to ≤ 5.10.*unaffected5.15.168 to ≤ 5.15.*unaffected6.1.113 to ≤ 6.1.*unaffected6.6.55 to ≤ 6.6.*unaffected6.10.14 to ≤ 6.10.*unaffected6.11.3 to ≤ 6.11.*unaffected6.12 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/ca36d6c1a49b6965c86dd528a73f38bc62d9c625 ↗
- https://git.kernel.org/stable/c/ce828b347cf1b3c1b12b091d02463c35ce5097f5 ↗
- https://git.kernel.org/stable/c/fc357e78176945ca7bcacf92ab794b9ccd41b4f4 ↗
- https://git.kernel.org/stable/c/26fad69b34fcba80d5c7d9e651f628e6ac927754 ↗
- https://git.kernel.org/stable/c/ecf310aaf256acbc8182189fe0aa1021c3ddef72 ↗
- https://git.kernel.org/stable/c/8bb8c12fb5e2b1f03d603d493c92941676f109b5 ↗
- https://git.kernel.org/stable/c/2bcae12c795f32ddfbf8c80d1b5f1d3286341c32 ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html ↗