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 --- fs/ntfs/ntfs_codec.h | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 fs/ntfs/ntfs_codec.h (limited to 'fs/ntfs/ntfs_codec.h') diff --git a/fs/ntfs/ntfs_codec.h b/fs/ntfs/ntfs_codec.h new file mode 100644 index 000000000..6030055fb --- /dev/null +++ b/fs/ntfs/ntfs_codec.h @@ -0,0 +1,54 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Transparent compression codec interface. + * + * Copyright (c) 2026 LG Electronics Co., Ltd. + */ + +#ifndef _NTFS_CODEC_H +#define _NTFS_CODEC_H + +#include +#include +#include + +struct compress_context; + +enum ntfs_codec_id { + NTFS_CODEC_LZNT1, +#ifdef CONFIG_NTFS_FS_WOF_COMPRESSION + NTFS_CODEC_XPRESS4K, + NTFS_CODEC_XPRESS8K, + NTFS_CODEC_XPRESS16K, + NTFS_CODEC_LZX32K, +#endif +}; + +struct ntfs_codec_ops { + enum ntfs_codec_id id; + const char *name; + size_t (*scratch_size)(u32 chunk_size); + int (*decompress_chunk)(void *scratch, + const void *src, size_t src_len, + void *dst, size_t dst_len, + u32 chunk_size); + int (*decompress_pages)(struct page *dest_pages[], + int completed_pages[], + int *dest_index, int *dest_ofs, + int dest_max_index, int dest_max_ofs, + int xpage, char *xpage_done, + u8 *cb_start, u32 cb_size, + loff_t i_size, s64 initialized_size); + int (*compress_subblock)(struct compress_context *pctx, + const char *inbuf, int bufsize, char *outbuf); +}; + +extern const struct ntfs_codec_ops ntfs_lznt1_codec_ops; +#ifdef CONFIG_NTFS_FS_WOF_COMPRESSION +extern const struct ntfs_codec_ops ntfs_xpress4k_codec_ops; +extern const struct ntfs_codec_ops ntfs_xpress8k_codec_ops; +extern const struct ntfs_codec_ops ntfs_xpress16k_codec_ops; +extern const struct ntfs_codec_ops ntfs_lzx32k_codec_ops; +#endif + +#endif /* _NTFS_CODEC_H */ -- cgit v1.3.1