CVE-2022-50486

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: ti: Fix return type of netcp_ndo_start_xmit() With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed. A proposed warning in clang aims to catch these at compile time, which reveals: drivers/net/ethernet/ti/netcp_core.c:1944:21: error: incompatible function pointer types initializing 'netdev_tx_t (*)(struct sk_buff *, struct net_device *)' (aka 'enum netdev_tx (*)(struct sk_buff *, struct net_device *)') with an expression of type 'int (struct sk_buff *, struct net_device *)' [-Werror,-Wincompatible-function-pointer-types-strict] .ndo_start_xmit = netcp_ndo_start_xmit, ^~~~~~~~~~~~~~~~~~~~ 1 error generated. ->ndo_start_xmit() in 'struct net_device_ops' expects a return type of 'netdev_tx_t', not 'int'. Adjust the return type of netcp_ndo_start_xmit() to match the prototype's to resolve the warning and CFI failure.

• https://git.kernel.org/stable/c/17bb9bdf701f3e811a9f4820b08b9538ade2641cPatch
• https://git.kernel.org/stable/c/1e4953b826e12b31995564a459dbd4e9e4604a35Patch
• https://git.kernel.org/stable/c/5b0b6553bf4ad3a435a57e02c68d6075f384e1bePatch
• https://git.kernel.org/stable/c/63fe6ff674a96cfcfc0fa8df1051a27aa31c70b4Patch
• https://git.kernel.org/stable/c/765636e58ba505cfe4927eda7ee83791b1c6402aPatch
• https://git.kernel.org/stable/c/a413ebb6049edd881c6427cfa25a7efddd6a4f74Patch
• https://git.kernel.org/stable/c/a447479ea2cf35603b5739ea947885024b901222Patch
• https://git.kernel.org/stable/c/d837d74eae077cc3ef9e191ba8535b5f602d4673Patch
• https://git.kernel.org/stable/c/dbe1a6b930ae9647e8ce0b684c903ac67d4398ebPatch

Published

Oct 4, 2025

Last Modified

Jun 17, 2026

Status

Analyzed

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