"value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: fix TSO DMA API usage causing oops\n\nCommit 66600fac7a98 (\"net: stmmac: TSO: Fix unbalanced DMA map/unmap\nfor non-paged SKB data\") moved the assignment of tx_skbuff_dma[]'s\nmembers to be later in stmmac_tso_xmit().\n\nThe buf (dma cookie) and len stored in this structure are passed to\ndma_unmap_single() by stmmac_tx_clean(). The DMA API requires that\nthe dma cookie passed to dma_unmap_single() is the same as the value\nreturned from dma_map_single(). However, by moving the assignment\nlater, this is not the case when priv->dma_cap.addr64 > 32 as \"des\"\nis offset by proto_hdr_len.\n\nThis causes problems such as:\n\n dwc-eth-dwmac 2490000.ethernet eth0: Tx DMA map failed\n\nand with DMA_API_DEBUG enabled:\n\n DMA-API: dwc-eth-dwmac 2490000.ethernet: device driver tries to +free DMA memory it has not allocated [device address=0x000000ffffcf65c0] [size=66 bytes]\n\nFix this by maintaining \"des\" as the original DMA cookie, and use\ntso_des to pass the offset DMA cookie to stmmac_tso_allocator().\n\nFull details of the crashes can be found at:\nhttps://lore.kernel.org/all/d8112193-0386-4e14-b516-37c2d838171a@nvidia.com/\nhttps://lore.kernel.org/all/klkzp5yn5kq5efgtrow6wbvnc46bcqfxs65nz3qy77ujr5turc@bwwhelz2l4dw/"
"value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: stmmac: fix TSO DMA API usage burning cause oops Commit 66600fac7a98 (\"net: stmmac: TSO: Fix unbalanced DMA map/unmap for non-paged SKB data\") movi\u00f3 la asignaci\u00f3n de los miembros de tx_skbuff_dma[] para que sea posterior en stmmac_tso_xmit(). El buf (dma cookie) y len almacenados en esta estructura se pasan a dma_unmap_single() por stmmac_tx_clean(). La DMA API requiere que la dma cookie pasada a dma_unmap_single() sea la misma que el valor devuelto desde dma_map_single(). Sin embargo, al mover la asignaci\u00f3n m\u00e1s tarde, este no es el caso cuando priv->dma_cap.addr64 > 32 como \"des\" es desplazado por proto_hdr_len. Esto causa problemas como: dwc-eth-dwmac 2490000.ethernet eth0: el mapa DMA de transmisi\u00f3n fall\u00f3 y con DMA_API_DEBUG habilitado: DMA-API: dwc-eth-dwmac 2490000.ethernet: el controlador del dispositivo intenta +liberar memoria DMA que no ha asignado [direcci\u00f3n del dispositivo=0x000000ffffcf65c0] [tama\u00f1o=66 bytes] Solucione esto manteniendo \"des\" como la cookie DMA original y use tso_des para pasar la cookie DMA de desplazamiento a stmmac_tso_allocator(). Los detalles completos de los fallos se pueden encontrar en: https://lore.kernel.org/all/d8112193-0386-4e14-b516-37c2d838171a@nvidia.com/ https://lore.kernel.org/all/klkzp5yn5kq5efgtrow6wbvnc46bcqfxs65nz3qy77ujr5turc@bwwhelz2l4dw/"
