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CVE PROGRAM SOURCE RECORD10.0 Critical

CVE-2024-56719

net: stmmac: fix TSO DMA API usage causing oops

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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/

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

  • ece593fc9c00741b682869d3f3dc584d37b7c9df to < 05968b6dd0ffc65d7386608b11a11fb4fdfc9f36affected
  • a3ff23f7c3f0e13f718900803e090fd3997d6bc9 to < 6abcdc9a73274052a9e96a1926994ecf9aedad82affected
  • 07c9c26e37542486e34d767505e842f48f29c3f6 to < db3667c9bbfbbf5de98e6c9542f7e03fb5243286affected
  • 66600fac7a984dea4ae095411f644770b2561ede to < 9d5dd7ccea1b46a9a7c6b3c2b9e5ed8864e185e2affected
  • 66600fac7a984dea4ae095411f644770b2561ede to < 4c49f38e20a57f8abaebdf95b369295b153d1f8eaffected
  • 58d23d835eb498336716cca55b5714191a309286affected
  • 5.15.171 to < 5.15.209affected
  • 6.1.116 to < 6.1.167affected
  • 6.6.60 to < 6.6.68affected
  • 6.11.7 to < 6.12affected

Linux Linux

Default version status: affected

  • 6.12affected
  • 0 to < 6.12unaffected
  • 5.15.209 to ≤ 5.15.*unaffected
  • 6.1.167 to ≤ 6.1.*unaffected
  • 6.6.68 to ≤ 6.6.*unaffected
  • 6.12.7 to ≤ 6.12.*unaffected
  • 6.13 to ≤ *unaffected

References