From ff917923f4fb9c83717ba135ee47d7e4c1567bb7 Mon Sep 17 00:00:00 2001 From: Muhammad Bilal Date: Tue, 28 Jul 2026 17:54:55 +0500 Subject: staging: rtl8723bs: fix OOB read in rtw_action_frame_parse() rtw_action_frame_parse() takes a frame_len parameter but never actually checks it before indexing into the frame body: const u8 *frame_body = frame + sizeof(struct ieee80211_hdr_3addr); ... c = frame_body[0]; ... a = frame_body[1]; frame_body already points 24 bytes (sizeof(struct ieee80211_hdr_3addr)) into frame, so reading frame_body[0] and frame_body[1] requires frame_len >= 26. A management action frame shorter than that (e.g. exactly 24 bytes, the minimum a malicious peer can send) causes a 1-2 byte out-of-bounds read. This is reachable from rtw_cfg80211_monitor_if_xmit_entry() and cfg80211_rtw_mgmt_tx() in ioctl_cfg80211.c, both of which pass attacker/user-influenced frame buffers and lengths straight through. Add the missing length check before frame_body is dereferenced. Fixes: 554c0a3abf216 ("staging: Add rtl8723bs sdio wifi driver") Cc: stable@vger.kernel.org Signed-off-by: Muhammad Bilal Link: https://patch.msgid.link/20260728125456.32359-3-meatuni001@gmail.com Signed-off-by: Greg Kroah-Hartman --- include/drm/intel/intel-gtt.h | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 include/drm/intel/intel-gtt.h (limited to 'include/drm/intel/intel-gtt.h') diff --git a/include/drm/intel/intel-gtt.h b/include/drm/intel/intel-gtt.h new file mode 100644 index 000000000..f53bcff01 --- /dev/null +++ b/include/drm/intel/intel-gtt.h @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Common header for intel-gtt.ko and i915.ko */ + +#ifndef _DRM_INTEL_GTT_H +#define _DRM_INTEL_GTT_H + +#include + +struct agp_bridge_data; +struct pci_dev; +struct sg_table; + +void intel_gmch_gtt_get(u64 *gtt_total, + phys_addr_t *mappable_base, + resource_size_t *mappable_end); + +int intel_gmch_probe(struct pci_dev *bridge_pdev, struct pci_dev *gpu_pdev, + struct agp_bridge_data *bridge); +void intel_gmch_remove(void); + +bool intel_gmch_enable_gtt(void); + +void intel_gmch_gtt_flush(void); +void intel_gmch_gtt_insert_page(dma_addr_t addr, + unsigned int pg, + unsigned int flags); +void intel_gmch_gtt_insert_sg_entries(struct sg_table *st, + unsigned int pg_start, + unsigned int flags); +void intel_gmch_gtt_clear_range(unsigned int first_entry, unsigned int num_entries); +dma_addr_t intel_gmch_gtt_read_entry(unsigned int pg, + bool *is_present, bool *is_local); + +/* Special gtt memory types */ +#define AGP_DCACHE_MEMORY 1 +#define AGP_PHYS_MEMORY 2 + +/* flag for GFDT type */ +#define AGP_USER_CACHED_MEMORY_GFDT (1 << 3) + +#endif -- cgit v1.3.1