CVE-2024-56719: net: stmmac: fix TSO DMA API usage causing oops
First published: Sun Dec 29 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: fix TSO DMA API usage causing oops Commit 66600fac7a98 ("net: stmmac: TSO: Fix unbalanced DMA map/unmap for non-paged SKB data") moved the assignment of tx_skbuff_dma[]'s members to be later in stmmac_tso_xmit(). The buf (dma cookie) and len stored in this structure are passed to dma_unmap_single() by stmmac_tx_clean(). The DMA API requires that the dma cookie passed to dma_unmap_single() is the same as the value returned from dma_map_single(). However, by moving the assignment later, this is not the case when priv->dma_cap.addr64 > 32 as "des" is offset by proto_hdr_len. This causes problems such as: dwc-eth-dwmac 2490000.ethernet eth0: Tx DMA map failed and with DMA_API_DEBUG enabled: DMA-API: dwc-eth-dwmac 2490000.ethernet: device driver tries to +free DMA memory it has not allocated [device address=0x000000ffffcf65c0] [size=66 bytes] Fix this by maintaining "des" as the original DMA cookie, and use tso_des to pass the offset DMA cookie to stmmac_tso_allocator(). Full details of the crashes can be found at: https://lore.kernel.org/all/d8112193-0386-4e14-b516-37c2d838171a@nvidia.com/ https://lore.kernel.org/all/klkzp5yn5kq5efgtrow6wbvnc46bcqfxs65nz3qy77ujr5turc@bwwhelz2l4dw/
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.15.171<5.16 | |
| Linux Kernel | >=6.1.116<6.2 | |
| Linux Kernel | >=6.6.60<6.6.68 | |
| Linux Kernel | >=6.11.7<6.12.7 | |
| Linux Kernel | =6.13-rc1 | |
| Linux Kernel | =6.13-rc2 | |
| debian/linux | <=6.1.129-1<=6.1.128-1 | 5.10.223-1 5.10.234-1 6.12.20-1 6.12.21-1 |
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Reference Links
- https://git.kernel.org/stable/c/db3667c9bbfbbf5de98e6c9542f7e03fb5243286
- https://git.kernel.org/stable/c/9d5dd7ccea1b46a9a7c6b3c2b9e5ed8864e185e2
- https://git.kernel.org/stable/c/4c49f38e20a57f8abaebdf95b369295b153d1f8e
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-56719
- https://nvd.nist.gov/vuln/detail/CVE-2024-56719
- https://launchpad.net/bugs/cve/CVE-2024-56719
- https://security-tracker.debian.org/tracker/CVE-2024-56719
- https://ubuntu.com/security/CVE-2024-56719
- https://git.kernel.org/linus/4c49f38e20a57f8abaebdf95b369295b153d1f8e
Frequently Asked Questions
What is the severity of CVE-2024-56719?
CVE-2024-56719 is classified as a moderate severity vulnerability in the Linux kernel.
How do I fix CVE-2024-56719?
To fix CVE-2024-56719, update your Linux kernel to a version that has addressed this vulnerability.
What software versions are affected by CVE-2024-56719?
CVE-2024-56719 affects various versions of the Linux kernel ranging from 5.15.171 to 6.12.7, including specific release candidates.
What type of vulnerability is CVE-2024-56719?
CVE-2024-56719 involves an issue with the TSO DMA API usage in the Linux kernel, leading to potential system instability.
Is there a known exploit for CVE-2024-56719?
As of now, there are no publicly known exploits specifically targeting CVE-2024-56719.
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