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authorPing-Ke Shih2022-05-16 08:52:12 +0800
committerKalle Valo2022-05-17 18:31:59 +0300
commit97df85871a5b187609d30fca6d85b912d9e02f29 (patch)
tree919777c3132530446167d233f0e5f84a48de4ff2 /drivers/net/wireless
parentd3efeee240f8dce123eb8569dc953f6cb3af3f17 (diff)
rtw89: cfo: check mac_id to avoid out-of-bounds
Somehow, hardware reports incorrect mac_id and pollute memory. Check index before we access the array. UBSAN: array-index-out-of-bounds in rtw89/phy.c:2517:23 index 188 is out of range for type 's32 [64]' CPU: 1 PID: 51550 Comm: irq/35-rtw89_pc Tainted: G OE Call Trace: <IRQ> show_stack+0x52/0x58 dump_stack_lvl+0x4c/0x63 dump_stack+0x10/0x12 ubsan_epilogue+0x9/0x45 __ubsan_handle_out_of_bounds.cold+0x44/0x49 ? __alloc_skb+0x92/0x1d0 rtw89_phy_cfo_parse+0x44/0x7f [rtw89_core] rtw89_core_rx+0x261/0x871 [rtw89_core] ? __alloc_skb+0xee/0x1d0 rtw89_pci_napi_poll+0x3fa/0x4ea [rtw89_pci] __napi_poll+0x33/0x1a0 net_rx_action+0x126/0x260 ? __queue_work+0x217/0x4c0 __do_softirq+0xd9/0x315 ? disable_irq_nosync+0x10/0x10 do_softirq.part.0+0x6d/0x90 </IRQ> <TASK> __local_bh_enable_ip+0x62/0x70 rtw89_pci_interrupt_threadfn+0x182/0x1a6 [rtw89_pci] irq_thread_fn+0x28/0x60 irq_thread+0xc8/0x190 ? irq_thread_fn+0x60/0x60 kthread+0x16b/0x190 ? irq_thread_check_affinity+0xe0/0xe0 ? set_kthread_struct+0x50/0x50 ret_from_fork+0x22/0x30 </TASK> Signed-off-by: Ping-Ke Shih <pkshih@realtek.com> Signed-off-by: Kalle Valo <kvalo@kernel.org> Link: https://lore.kernel.org/r/20220516005215.5878-4-pkshih@realtek.com
Diffstat (limited to 'drivers/net/wireless')
-rw-r--r--drivers/net/wireless/realtek/rtw89/phy.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/wireless/realtek/rtw89/phy.c b/drivers/net/wireless/realtek/rtw89/phy.c
index c9a4ae989ac7..79e4c28495c8 100644
--- a/drivers/net/wireless/realtek/rtw89/phy.c
+++ b/drivers/net/wireless/realtek/rtw89/phy.c
@@ -2462,6 +2462,11 @@ void rtw89_phy_cfo_parse(struct rtw89_dev *rtwdev, s16 cfo_val,
struct rtw89_cfo_tracking_info *cfo = &rtwdev->cfo_tracking;
u8 macid = phy_ppdu->mac_id;
+ if (macid >= CFO_TRACK_MAX_USER) {
+ rtw89_warn(rtwdev, "mac_id %d is out of range\n", macid);
+ return;
+ }
+
cfo->cfo_tail[macid] += cfo_val;
cfo->cfo_cnt[macid]++;
cfo->packet_count++;