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 4/5 resend] ath9x: Fix stack-out-of-bounds Write in ath9k_hif_usb_rx_cb
Date: Sat, 4 Apr 2020 12:18:37 +0800 [thread overview]
Message-ID: <20200404041838.10426-5-hqjagain@gmail.com> (raw)
In-Reply-To: <20200404041838.10426-1-hqjagain@gmail.com>
Add barrier to accessing the stack array skb_pool.
The case reported by syzbot:
https://lore.kernel.org/linux-usb/0000000000003d7c1505a2168418@google.com
BUG: KASAN: stack-out-of-bounds in ath9k_hif_usb_rx_stream
drivers/net/wireless/ath/ath9k/hif_usb.c:626 [inline]
BUG: KASAN: stack-out-of-bounds in ath9k_hif_usb_rx_cb+0xdf6/0xf70
drivers/net/wireless/ath/ath9k/hif_usb.c:666
Write of size 8 at addr ffff8881db309a28 by task swapper/1/0
Call Trace:
ath9k_hif_usb_rx_stream drivers/net/wireless/ath/ath9k/hif_usb.c:626
[inline]
ath9k_hif_usb_rx_cb+0xdf6/0xf70
drivers/net/wireless/ath/ath9k/hif_usb.c:666
__usb_hcd_giveback_urb+0x1f2/0x470 drivers/usb/core/hcd.c:1648
usb_hcd_giveback_urb+0x368/0x420 drivers/usb/core/hcd.c:1713
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+d403396d4df67ad0bd5f@syzkaller.appspotmail.com
Signed-off-by: Qiujun Huang <hqjagain@gmail.com>
---
drivers/net/wireless/ath/ath9k/hif_usb.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/net/wireless/ath/ath9k/hif_usb.c b/drivers/net/wireless/ath/ath9k/hif_usb.c
index f227e19087ff..6049d3766c64 100644
--- a/drivers/net/wireless/ath/ath9k/hif_usb.c
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.c
@@ -612,6 +612,11 @@ static void ath9k_hif_usb_rx_stream(struct hif_device_usb *hif_dev,
hif_dev->remain_skb = nskb;
spin_unlock(&hif_dev->rx_lock);
} else {
+ if (pool_index == MAX_PKT_NUM_IN_TRANSFER) {
+ dev_err(&hif_dev->udev->dev,
+ "ath9k_htc: over RX MAX_PKT_NUM\n");
+ goto err;
+ }
nskb = __dev_alloc_skb(pkt_len + 32, GFP_ATOMIC);
if (!nskb) {
dev_err(&hif_dev->udev->dev,
--
2.17.1
next prev parent reply other threads:[~2020-04-04 4:19 UTC|newest]
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 ` [PATCH 3/5] ath9k: Fix use-after-free Write in ath9k_htc_rx_msg Qiujun Huang
2020-04-04 4:18 ` Qiujun Huang [this message]
2020-04-04 4:18 ` [PATCH 5/5] ath9k: Fix general protection fault in ath9k_hif_usb_rx_cb 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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