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 --- io_uring/net.h | 79 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) create mode 100644 io_uring/net.h (limited to 'io_uring/net.h') diff --git a/io_uring/net.h b/io_uring/net.h new file mode 100644 index 000000000..51fda715d --- /dev/null +++ b/io_uring/net.h @@ -0,0 +1,79 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include +#include + +struct io_async_msghdr { +#if defined(CONFIG_NET) + struct iou_vec vec; + + struct_group(clear, + int namelen; + struct iovec fast_iov; + __kernel_size_t controllen; + __kernel_size_t payloadlen; + struct sockaddr __user *uaddr; + struct msghdr msg; + struct sockaddr_storage addr; + ); +#else + struct_group(clear); +#endif +}; + +#if defined(CONFIG_NET) + +int io_shutdown_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); +int io_shutdown(struct io_kiocb *req, unsigned int issue_flags); + +void io_sendmsg_recvmsg_cleanup(struct io_kiocb *req); +int io_sendmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); +int io_sendmsg(struct io_kiocb *req, unsigned int issue_flags); + +int io_send(struct io_kiocb *req, unsigned int issue_flags); + +int io_recvmsg_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); +int io_recvmsg(struct io_kiocb *req, unsigned int issue_flags); +int io_recv(struct io_kiocb *req, unsigned int issue_flags); + +void io_sendrecv_fail(struct io_kiocb *req); + +int io_accept_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); +int io_accept(struct io_kiocb *req, unsigned int issue_flags); + +int io_socket_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); +int io_socket(struct io_kiocb *req, unsigned int issue_flags); +void io_socket_bpf_populate(struct io_uring_bpf_ctx *bctx, struct io_kiocb *req); +void io_connect_bpf_populate(struct io_uring_bpf_ctx *bctx, struct io_kiocb *req); + +int io_connect_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); +int io_connect(struct io_kiocb *req, unsigned int issue_flags); + +int io_sendmsg_zc(struct io_kiocb *req, unsigned int issue_flags); +int io_send_zc_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); +void io_send_zc_cleanup(struct io_kiocb *req); + +int io_bind_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); +int io_bind(struct io_kiocb *req, unsigned int issue_flags); + +int io_listen_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe); +int io_listen(struct io_kiocb *req, unsigned int issue_flags); + +void io_netmsg_cache_free(const void *entry); +#else +static inline void io_netmsg_cache_free(const void *entry) +{ +} +static inline void io_socket_bpf_populate(struct io_uring_bpf_ctx *bctx, + struct io_kiocb *req) +{ +} + +static inline void io_connect_bpf_populate(struct io_uring_bpf_ctx *bctx, + struct io_kiocb *req) +{ +} + +#endif -- cgit v1.3.1