From: Qiujun Huang <hqjagain@gmail.com>
To: kvalo@codeaurora.org, ath9k-devel@qca.qualcomm.com
Cc: davem@davemloft.net, linux-wireless@vger.kernel.org,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
anenbupt@gmail.com, syzkaller-bugs@googlegroups.com,
Qiujun Huang <hqjagain@gmail.com>
Subject: [PATCH 3/5] ath9k: Fix use-after-free Write in ath9k_htc_rx_msg
Date: Sat, 4 Apr 2020 12:18:36 +0800
Message-ID: <20200404041838.10426-4-hqjagain@gmail.com> (raw)
In-Reply-To: <20200404041838.10426-1-hqjagain@gmail.com>
Write out of slab bounds. We should check epid.
The case reported by syzbot:
https://lore.kernel.org/linux-usb/0000000000006ac55b05a1c05d72@google.com
BUG: KASAN: use-after-free in htc_process_conn_rsp
drivers/net/wireless/ath/ath9k/htc_hst.c:131 [inline]
BUG: KASAN: use-after-free in ath9k_htc_rx_msg+0xa25/0xaf0
drivers/net/wireless/ath/ath9k/htc_hst.c:443
Write of size 2 at addr ffff8881cea291f0 by task swapper/1/0
Call Trace:
htc_process_conn_rsp drivers/net/wireless/ath/ath9k/htc_hst.c:131
[inline]
ath9k_htc_rx_msg+0xa25/0xaf0
drivers/net/wireless/ath/ath9k/htc_hst.c:443
ath9k_hif_usb_reg_in_cb+0x1ba/0x630
drivers/net/wireless/ath/ath9k/hif_usb.c:718
__usb_hcd_giveback_urb+0x29a/0x550 drivers/usb/core/hcd.c:1650
usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1716
dummy_timer+0x1258/0x32ae drivers/usb/gadget/udc/dummy_hcd.c:1966
call_timer_fn+0x195/0x6f0 kernel/time/timer.c:1404
expire_timers kernel/time/timer.c:1449 [inline]
__run_timers kernel/time/timer.c:1773 [inline]
__run_timers kernel/time/timer.c:1740 [inline]
run_timer_softirq+0x5f9/0x1500 kernel/time/timer.c:1786
Reported-and-tested-by: syzbot+b1c61e5f11be5782f192@syzkaller.appspotmail.com
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
---
drivers/net/wireless/ath/ath9k/htc_hst.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/net/wireless/ath/ath9k/htc_hst.c b/drivers/net/wireless/ath/ath9k/htc_hst.c
index 1bf63a4efb4c..d2e062eaf561 100644
--- a/drivers/net/wireless/ath/ath9k/htc_hst.c
+++ b/drivers/net/wireless/ath/ath9k/htc_hst.c
@@ -113,6 +113,9 @@ static void htc_process_conn_rsp(struct htc_target *target,
if (svc_rspmsg->status == HTC_SERVICE_SUCCESS) {
epid = svc_rspmsg->endpoint_id;
+ if (epid < 0 || epid >= ENDPOINT_MAX)
+ return;
+
service_id = be16_to_cpu(svc_rspmsg->service_id);
max_msglen = be16_to_cpu(svc_rspmsg->max_msg_len);
endpoint = &target->endpoint[epid];
--
2.17.1
next prev parent reply index
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-04 4:18 [PATCH 0/5] ath9k: bug fixes Qiujun Huang
2020-04-04 4:18 ` [PATCH 1/5] ath9k: Fix use-after-free Read in htc_connect_service Qiujun Huang
2020-04-07 5:01 ` Kalle Valo
2020-04-07 10:51 ` Dan Carpenter
2020-04-04 4:18 ` [PATCH 2/5] ath9k: Fix use-after-free Read in ath9k_wmi_ctrl_rx Qiujun Huang
2020-04-04 4:18 ` Qiujun Huang [this message]
2020-04-04 4:18 ` [PATCH 4/5 resend] ath9x: Fix stack-out-of-bounds Write in ath9k_hif_usb_rx_cb Qiujun Huang
2020-04-04 4:18 ` [PATCH 5/5] ath9k: Fix general protection fault " Qiujun Huang
2020-04-07 12:50 ` Dan Carpenter
2020-06-20 21:04 ` [BISECTED REGRESSION] " Roman Mamedov
2020-06-22 14:36 ` Kalle Valo
2020-07-01 15:53 ` [PATCH] Revert "ath9k: Fix general protection fault in ath9k_hif_usb_rx_cb" Viktor Jägersküpper
2020-07-01 19:56 ` Roman Mamedov
2020-07-01 21:32 ` [PATCH v2] " Viktor Jägersküpper
2020-07-02 6:43 ` [PATCH] " Kalle Valo
2020-07-09 14:36 ` Viktor Jägersküpper
2020-07-13 14:26 ` Kalle Valo
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