Description

In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: add bounds check for if_id in IRQ handler The IRQ handler extracts if_id from the upper 16 bits of the hardware status register and uses it to index into ethsw->ports[] without validation. Since if_id can be any 16-bit value (0-65535) but the ports array is only allocated with sw_attr.num_ifs elements, this can lead to an out-of-bounds read potentially. Add a bounds check before accessing the array, consistent with the existing validation in dpaa2_switch_rx().

References 6

• git.kernel.org https://git.kernel.org/stable/c/1b381a638e1851d8cfdfe08ed9cdbec5295b18c9
• git.kernel.org https://git.kernel.org/stable/c/2447edc367800ba914acf7ddd5d250416b45fb31
• git.kernel.org https://git.kernel.org/stable/c/31a7a0bbeb006bac2d9c81a2874825025214b6d8
• git.kernel.org https://git.kernel.org/stable/c/34b56c16efd61325d80bf1d780d0e176be662f59
• git.kernel.org https://git.kernel.org/stable/c/77611cab5bdfff7a070ae574bbfba20a1de99d1b
• git.kernel.org https://git.kernel.org/stable/c/f89e33c9c37f0001b730e23b3b05ab7b1ecface2

Remediation