net: stmmac: fix TSO DMA API usage causing oops
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 5.15.209, 6.1.167, 6.6.68, 6.12, 6.12.7
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
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/
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
From ece593fc9c00741b682869d3f3dc584d37b7c9df · fixed in 05968b6dd0ffc65d7386608b11a11fb4fdfc9f36; From a3ff23f7c3f0e13f718900803e090fd3997d6bc9 · fixed in 6abcdc9a73274052a9e96a1926994ecf9aedad82; From 07c9c26e37542486e34d767505e842f48f29c3f6 · fixed in db3667c9bbfbbf5de98e6c9542f7e03fb5243286; From 66600fac7a984dea4ae095411f644770b2561ede · fixed in 9d5dd7ccea1b46a9a7c6b3c2b9e5ed8864e185e2; From 66600fac7a984dea4ae095411f644770b2561ede · fixed in 4c49f38e20a57f8abaebdf95b369295b153d1f8e; From 5.15.171 · fixed in 5.15.209; From 6.1.116 · fixed in 6.1.167; From 6.6.60 · fixed in 6.6.68; From 6.11.7 · fixed in 6.12
- Linux Linux
6.12
- KernelLinux
fixed in 5.15.209; From 5.16.0 · fixed in 6.1.167; From 6.2.0 · fixed in 6.6.68; From 6.7.0 · fixed in 6.12.7