CVE-2024-56609
Ping-Ke Shih (2): wifi: mac80211: export ieee80211_purge_tx_queue() for drivers wifi: rtw88: use ieee80211_purge_tx_queue() to purge TX skb
drivers/net/wireless/realtek/rtw88/sdio.c | 6 +++--- drivers/net/wireless/realtek/rtw88/usb.c | 5 +++-- include/net/mac80211.h | 13 +++++++++++++ net/mac80211/ieee80211_i.h | 2 -- net/mac80211/status.c | 1 + 5 files changed, 20 insertions(+), 7 deletions(-)
From: Ping-Ke Shih pkshih@realtek.com
mainline inclusion from mainline-v6.12-rc1 commit 53bc1b73b67836ac9867f93dee7a443986b4a94f category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBEAOM CVE: CVE-2024-56609
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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Drivers need to purge TX SKB when stopping. Using skb_queue_purge() can't report TX status to mac80211, causing ieee80211_free_ack_frame() warns "Have pending ack frames!". Export ieee80211_purge_tx_queue() for drivers to not have to reimplement it.
Signed-off-by: Ping-Ke Shih pkshih@realtek.com Link: https://patch.msgid.link/20240822014255.10211-1-pkshih@realtek.com Signed-off-by: Johannes Berg johannes.berg@intel.com Signed-off-by: Zicheng Qu quzicheng@huawei.com --- include/net/mac80211.h | 13 +++++++++++++ net/mac80211/ieee80211_i.h | 2 -- net/mac80211/status.c | 1 + 3 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/include/net/mac80211.h b/include/net/mac80211.h index 47ade676565d..901fe3ac139e 100644 --- a/include/net/mac80211.h +++ b/include/net/mac80211.h @@ -3039,6 +3039,19 @@ ieee80211_get_alt_retry_rate(const struct ieee80211_hw *hw, */ void ieee80211_free_txskb(struct ieee80211_hw *hw, struct sk_buff *skb);
+/** + * ieee80211_purge_tx_queue - purge TX skb queue + * @hw: the hardware + * @skbs: the skbs + * + * Free a set of transmit skbs. Use this function when device is going to stop + * but some transmit skbs without TX status are still queued. + * This function does not take the list lock and the caller must hold the + * relevant locks to use it. + */ +void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, + struct sk_buff_head *skbs); + /** * DOC: Hardware crypto acceleration * diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h index daea061d0fc1..04c876d78d3b 100644 --- a/net/mac80211/ieee80211_i.h +++ b/net/mac80211/ieee80211_i.h @@ -2057,8 +2057,6 @@ void __ieee80211_subif_start_xmit(struct sk_buff *skb, u32 info_flags, u32 ctrl_flags, u64 *cookie); -void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, - struct sk_buff_head *skbs); struct sk_buff * ieee80211_build_data_template(struct ieee80211_sub_if_data *sdata, struct sk_buff *skb, u32 info_flags); diff --git a/net/mac80211/status.c b/net/mac80211/status.c index 44d83da60aee..9676ed15efec 100644 --- a/net/mac80211/status.c +++ b/net/mac80211/status.c @@ -1270,3 +1270,4 @@ void ieee80211_purge_tx_queue(struct ieee80211_hw *hw, while ((skb = __skb_dequeue(skbs))) ieee80211_free_txskb(hw, skb); } +EXPORT_SYMBOL(ieee80211_purge_tx_queue);
From: Ping-Ke Shih pkshih@realtek.com
mainline inclusion from mainline-6.13-rc1 commit 3e5e4a801aaf4283390cc34959c6c48f910ca5ea category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IBEAOM CVE: CVE-2024-56609
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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When removing kernel modules by: rmmod rtw88_8723cs rtw88_8703b rtw88_8723x rtw88_sdio rtw88_core
Driver uses skb_queue_purge() to purge TX skb, but not report tx status causing "Have pending ack frames!" warning. Use ieee80211_purge_tx_queue() to correct this.
Since ieee80211_purge_tx_queue() doesn't take locks, to prevent racing between TX work and purge TX queue, flush and destroy TX work in advance.
wlan0: deauthenticating from aa:f5:fd:60:4c:a8 by local choice (Reason: 3=DEAUTH_LEAVING) ------------[ cut here ]------------ Have pending ack frames! WARNING: CPU: 3 PID: 9232 at net/mac80211/main.c:1691 ieee80211_free_ack_frame+0x5c/0x90 [mac80211] CPU: 3 PID: 9232 Comm: rmmod Tainted: G C 6.10.1-200.fc40.aarch64 #1 Hardware name: pine64 Pine64 PinePhone Braveheart (1.1)/Pine64 PinePhone Braveheart (1.1), BIOS 2024.01 01/01/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : ieee80211_free_ack_frame+0x5c/0x90 [mac80211] lr : ieee80211_free_ack_frame+0x5c/0x90 [mac80211] sp : ffff80008c1b37b0 x29: ffff80008c1b37b0 x28: ffff000003be8000 x27: 0000000000000000 x26: 0000000000000000 x25: ffff000003dc14b8 x24: ffff80008c1b37d0 x23: ffff000000ff9f80 x22: 0000000000000000 x21: 000000007fffffff x20: ffff80007c7e93d8 x19: ffff00006e66f400 x18: 0000000000000000 x17: ffff7ffffd2b3000 x16: ffff800083fc0000 x15: 0000000000000000 x14: 0000000000000000 x13: 2173656d61726620 x12: 6b636120676e6964 x11: 0000000000000000 x10: 000000000000005d x9 : ffff8000802af2b0 x8 : ffff80008c1b3430 x7 : 0000000000000001 x6 : 0000000000000001 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff000003be8000 Call trace: ieee80211_free_ack_frame+0x5c/0x90 [mac80211] idr_for_each+0x74/0x110 ieee80211_free_hw+0x44/0xe8 [mac80211] rtw_sdio_remove+0x9c/0xc0 [rtw88_sdio] sdio_bus_remove+0x44/0x180 device_remove+0x54/0x90 device_release_driver_internal+0x1d4/0x238 driver_detach+0x54/0xc0 bus_remove_driver+0x78/0x108 driver_unregister+0x38/0x78 sdio_unregister_driver+0x2c/0x40 rtw_8723cs_driver_exit+0x18/0x1000 [rtw88_8723cs] __do_sys_delete_module.isra.0+0x190/0x338 __arm64_sys_delete_module+0x1c/0x30 invoke_syscall+0x74/0x100 el0_svc_common.constprop.0+0x48/0xf0 do_el0_svc+0x24/0x38 el0_svc+0x3c/0x158 el0t_64_sync_handler+0x120/0x138 el0t_64_sync+0x194/0x198 ---[ end trace 0000000000000000 ]---
Reported-by: Peter Robinson pbrobinson@gmail.com Closes: https://lore.kernel.org/linux-wireless/CALeDE9OAa56KMzgknaCD3quOgYuEHFx9_hcT... Tested-by: Ping-Ke Shih pkshih@realtek.com # 8723DU Signed-off-by: Ping-Ke Shih pkshih@realtek.com Link: https://patch.msgid.link/20240822014255.10211-2-pkshih@realtek.com Signed-off-by: Zicheng Qu quzicheng@huawei.com --- drivers/net/wireless/realtek/rtw88/sdio.c | 6 +++--- drivers/net/wireless/realtek/rtw88/usb.c | 5 +++-- 2 files changed, 6 insertions(+), 5 deletions(-)
diff --git a/drivers/net/wireless/realtek/rtw88/sdio.c b/drivers/net/wireless/realtek/rtw88/sdio.c index 0cae5746f540..5bd1ee81210d 100644 --- a/drivers/net/wireless/realtek/rtw88/sdio.c +++ b/drivers/net/wireless/realtek/rtw88/sdio.c @@ -1295,12 +1295,12 @@ static void rtw_sdio_deinit_tx(struct rtw_dev *rtwdev) struct rtw_sdio *rtwsdio = (struct rtw_sdio *)rtwdev->priv; int i;
- for (i = 0; i < RTK_MAX_TX_QUEUE_NUM; i++) - skb_queue_purge(&rtwsdio->tx_queue[i]); - flush_workqueue(rtwsdio->txwq); destroy_workqueue(rtwsdio->txwq); kfree(rtwsdio->tx_handler_data); + + for (i = 0; i < RTK_MAX_TX_QUEUE_NUM; i++) + ieee80211_purge_tx_queue(rtwdev->hw, &rtwsdio->tx_queue[i]); }
int rtw_sdio_probe(struct sdio_func *sdio_func, diff --git a/drivers/net/wireless/realtek/rtw88/usb.c b/drivers/net/wireless/realtek/rtw88/usb.c index 04a64afcbf8a..8f1d653282b7 100644 --- a/drivers/net/wireless/realtek/rtw88/usb.c +++ b/drivers/net/wireless/realtek/rtw88/usb.c @@ -416,10 +416,11 @@ static void rtw_usb_tx_handler(struct work_struct *work)
static void rtw_usb_tx_queue_purge(struct rtw_usb *rtwusb) { + struct rtw_dev *rtwdev = rtwusb->rtwdev; int i;
for (i = 0; i < ARRAY_SIZE(rtwusb->tx_queue); i++) - skb_queue_purge(&rtwusb->tx_queue[i]); + ieee80211_purge_tx_queue(rtwdev->hw, &rtwusb->tx_queue[i]); }
static void rtw_usb_write_port_complete(struct urb *urb) @@ -801,9 +802,9 @@ static void rtw_usb_deinit_tx(struct rtw_dev *rtwdev) { struct rtw_usb *rtwusb = rtw_get_usb_priv(rtwdev);
- rtw_usb_tx_queue_purge(rtwusb); flush_workqueue(rtwusb->txwq); destroy_workqueue(rtwusb->txwq); + rtw_usb_tx_queue_purge(rtwusb); }
static int rtw_usb_intf_init(struct rtw_dev *rtwdev,
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