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/netfs/stats.c | 103 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 103 insertions(+) create mode 100644 fs/netfs/stats.c (limited to 'fs/netfs/stats.c') diff --git a/fs/netfs/stats.c b/fs/netfs/stats.c new file mode 100644 index 000000000..ab6b916ad --- /dev/null +++ b/fs/netfs/stats.c @@ -0,0 +1,103 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* Netfs support statistics + * + * Copyright (C) 2021 Red Hat, Inc. All Rights Reserved. + * Written by David Howells (dhowells@redhat.com) + */ + +#include +#include +#include "internal.h" + +atomic_t netfs_n_rh_dio_read; +atomic_t netfs_n_rh_readahead; +atomic_t netfs_n_rh_read_folio; +atomic_t netfs_n_rh_read_single; +atomic_t netfs_n_rh_rreq; +atomic_t netfs_n_rh_sreq; +atomic_t netfs_n_rh_download; +atomic_t netfs_n_rh_download_done; +atomic_t netfs_n_rh_download_failed; +atomic_t netfs_n_rh_download_instead; +atomic_t netfs_n_rh_read; +atomic_t netfs_n_rh_read_done; +atomic_t netfs_n_rh_read_failed; +atomic_t netfs_n_rh_zero; +atomic_t netfs_n_rh_short_read; +atomic_t netfs_n_rh_write; +atomic_t netfs_n_rh_write_begin; +atomic_t netfs_n_rh_write_done; +atomic_t netfs_n_rh_write_failed; +atomic_t netfs_n_rh_write_zskip; +atomic_t netfs_n_rh_retry_read_req; +atomic_t netfs_n_rh_retry_read_subreq; +atomic_t netfs_n_wh_buffered_write; +atomic_t netfs_n_wh_writethrough; +atomic_t netfs_n_wh_dio_write; +atomic_t netfs_n_wh_writepages; +atomic_t netfs_n_wh_copy_to_cache; +atomic_t netfs_n_wh_wstream_conflict; +atomic_t netfs_n_wh_upload; +atomic_t netfs_n_wh_upload_done; +atomic_t netfs_n_wh_upload_failed; +atomic_t netfs_n_wh_write; +atomic_t netfs_n_wh_write_done; +atomic_t netfs_n_wh_write_failed; +atomic_t netfs_n_wh_retry_write_req; +atomic_t netfs_n_wh_retry_write_subreq; +atomic_t netfs_n_wb_lock_skip; +atomic_t netfs_n_wb_lock_wait; +atomic_t netfs_n_folioq; + +int netfs_stats_show(struct seq_file *m, void *v) +{ + seq_printf(m, "Reads : DR=%u RA=%u RF=%u RS=%u WB=%u WBZ=%u\n", + atomic_read(&netfs_n_rh_dio_read), + atomic_read(&netfs_n_rh_readahead), + atomic_read(&netfs_n_rh_read_folio), + atomic_read(&netfs_n_rh_read_single), + atomic_read(&netfs_n_rh_write_begin), + atomic_read(&netfs_n_rh_write_zskip)); + seq_printf(m, "Writes : BW=%u WT=%u DW=%u WP=%u 2C=%u\n", + atomic_read(&netfs_n_wh_buffered_write), + atomic_read(&netfs_n_wh_writethrough), + atomic_read(&netfs_n_wh_dio_write), + atomic_read(&netfs_n_wh_writepages), + atomic_read(&netfs_n_wh_copy_to_cache)); + seq_printf(m, "ZeroOps: ZR=%u sh=%u sk=%u\n", + atomic_read(&netfs_n_rh_zero), + atomic_read(&netfs_n_rh_short_read), + atomic_read(&netfs_n_rh_write_zskip)); + seq_printf(m, "DownOps: DL=%u ds=%u df=%u di=%u\n", + atomic_read(&netfs_n_rh_download), + atomic_read(&netfs_n_rh_download_done), + atomic_read(&netfs_n_rh_download_failed), + atomic_read(&netfs_n_rh_download_instead)); + seq_printf(m, "CaRdOps: RD=%u rs=%u rf=%u\n", + atomic_read(&netfs_n_rh_read), + atomic_read(&netfs_n_rh_read_done), + atomic_read(&netfs_n_rh_read_failed)); + seq_printf(m, "UpldOps: UL=%u us=%u uf=%u\n", + atomic_read(&netfs_n_wh_upload), + atomic_read(&netfs_n_wh_upload_done), + atomic_read(&netfs_n_wh_upload_failed)); + seq_printf(m, "CaWrOps: WR=%u ws=%u wf=%u\n", + atomic_read(&netfs_n_wh_write), + atomic_read(&netfs_n_wh_write_done), + atomic_read(&netfs_n_wh_write_failed)); + seq_printf(m, "Retries: rq=%u rs=%u wq=%u ws=%u\n", + atomic_read(&netfs_n_rh_retry_read_req), + atomic_read(&netfs_n_rh_retry_read_subreq), + atomic_read(&netfs_n_wh_retry_write_req), + atomic_read(&netfs_n_wh_retry_write_subreq)); + seq_printf(m, "Objs : rr=%u sr=%u foq=%u wsc=%u\n", + atomic_read(&netfs_n_rh_rreq), + atomic_read(&netfs_n_rh_sreq), + atomic_read(&netfs_n_folioq), + atomic_read(&netfs_n_wh_wstream_conflict)); + seq_printf(m, "WbLock : skip=%u wait=%u\n", + atomic_read(&netfs_n_wb_lock_skip), + atomic_read(&netfs_n_wb_lock_wait)); + return fscache_stats_show(m); +} +EXPORT_SYMBOL(netfs_stats_show); -- cgit v1.3.1