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 --- drivers/clocksource/timer-versatile.c | 40 +++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 drivers/clocksource/timer-versatile.c (limited to 'drivers/clocksource/timer-versatile.c') diff --git a/drivers/clocksource/timer-versatile.c b/drivers/clocksource/timer-versatile.c new file mode 100644 index 000000000..f5d017b31 --- /dev/null +++ b/drivers/clocksource/timer-versatile.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * + * Copyright (C) 2014 ARM Limited + */ + +#include +#include +#include +#include +#include + +#define SYS_24MHZ 0x05c + +static void __iomem *versatile_sys_24mhz; + +static u64 notrace versatile_sys_24mhz_read(void) +{ + return readl(versatile_sys_24mhz); +} + +static int __init versatile_sched_clock_init(struct device_node *node) +{ + void __iomem *base = of_iomap(node, 0); + + of_node_clear_flag(node, OF_POPULATED); + + if (!base) + return -ENXIO; + + versatile_sys_24mhz = base + SYS_24MHZ; + + sched_clock_register(versatile_sys_24mhz_read, 32, 24000000); + + return 0; +} +TIMER_OF_DECLARE(vexpress, "arm,vexpress-sysreg", + versatile_sched_clock_init); +TIMER_OF_DECLARE(versatile, "arm,versatile-sysreg", + versatile_sched_clock_init); -- cgit v1.3.1