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/fuse/args.h | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 67 insertions(+) create mode 100644 fs/fuse/args.h (limited to 'fs/fuse/args.h') diff --git a/fs/fuse/args.h b/fs/fuse/args.h new file mode 100644 index 000000000..5173264a1 --- /dev/null +++ b/fs/fuse/args.h @@ -0,0 +1,67 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _FS_FUSE_ARGS_H +#define _FS_FUSE_ARGS_H + +#include + +struct fuse_mount; + +/** One input argument of a request */ +struct fuse_in_arg { + unsigned size; + const void *value; +}; + +/** One output argument of a request */ +struct fuse_arg { + unsigned size; + void *value; +}; + +struct fuse_args { + u64 nodeid; + u32 opcode; + u32 uid; + u32 gid; + u32 pid; + u8 in_numargs; + u8 out_numargs; + u8 ext_idx; + bool force:1; + bool noreply:1; + bool nocreds:1; + bool in_pages:1; + bool out_pages:1; + bool user_pages:1; + bool out_argvar:1; + bool page_zeroing:1; + bool page_replace:1; + bool may_block:1; + bool is_ext:1; + bool is_pinned:1; + bool invalidate_vmap:1; + bool abort_on_kill:1; + /* server requested io-uring zero-copy for this op */ + bool zero_copy:1; + struct fuse_in_arg in_args[4]; + struct fuse_arg out_args[2]; + void (*end)(struct fuse_args *args, int error); + /* Used for kvec iter backed by vmalloc address */ + void *vmap_base; +}; + +/** FUSE folio descriptor */ +struct fuse_folio_desc { + unsigned int length; + unsigned int offset; +}; + +struct fuse_args_pages { + struct fuse_args args; + struct folio **folios; + struct fuse_folio_desc *descs; + unsigned int num_folios; +}; + +#endif /* _FS_FUSE_ARGS_H */ -- cgit v1.3.1