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| author | Tristan Madani <tristan@talencesecurity.com> | 2026-04-21 11:14:34 +0000 |
|---|---|---|
| committer | Ping-Ke Shih <pkshih@realtek.com> | 2026-04-29 13:27:45 +0800 |
| commit | 6e76e9ed273dfb4b3333a5ebbb94958cc5752ab6 (patch) | |
| tree | 605fae78f6549c1610a11ef799838fc44d4b63ed /tools/perf/scripts/python | |
| parent | b465bc7e18a7a2308db3658b1a4f7f55bad0fd3e (diff) | |
wifi: rtw88: fix OOB read from firmware RX descriptor exceeding DMA buffer
In rtw_pci_rx_napi(), new_len is computed as the sum of pkt_len (14-bit
descriptor field, max 16383) and pkt_offset (drv_info_sz + shift, both
firmware-controlled). The result can exceed RTK_PCI_RX_BUF_SIZE (11478),
causing an out-of-bounds read from the pre-allocated DMA buffer when
skb_put_data copies new_len bytes. The USB transport already validates
this (rtw_usb_rx_data_put checks against RTW_USB_MAX_RECVBUF_SZ); the
PCIe path does not.
Add a check that new_len does not exceed the DMA buffer size.
Fixes: e3037485c68e ("rtw88: new Realtek 802.11ac driver")
Signed-off-by: Tristan Madani <tristan@talencesecurity.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20260421111434.3389674-1-tristmd@gmail.com
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions