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Subject[PATCH RESEND 3/9] usb: xhci-mtk: fix use-after-free of mtk->hcd
Date
 BUG: KASAN: use-after-free in usb_hcd_is_primary_hcd+0x38/0x60
Call trace:
dump_backtrace+0x0/0x3dc
show_stack+0x20/0x2c
dump_stack+0x15c/0x1d4
print_address_description+0x7c/0x510
kasan_report+0x164/0x1ac
__asan_report_load8_noabort+0x44/0x50
usb_hcd_is_primary_hcd+0x38/0x60
xhci_mtk_runtime_suspend+0x68/0x148
pm_generic_runtime_suspend+0x90/0xac
__rpm_callback+0xb8/0x1f4
rpm_callback+0x54/0x1d0
rpm_suspend+0x4e0/0xc84
__pm_runtime_suspend+0xc4/0x114
xhci_mtk_probe+0xa58/0xd00

This may happen when probe fails, needn't suspend it synchronously,
fix it by using pm_runtime_put_noidle().

Reported-by: Pi Hsun <pihsun@google.com>
Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
---
drivers/usb/host/xhci-mtk.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c
index d66b6a8b59ba..f6d161670c4e 100644
--- a/drivers/usb/host/xhci-mtk.c
+++ b/drivers/usb/host/xhci-mtk.c
@@ -573,7 +573,7 @@ static int xhci_mtk_probe(struct platform_device *pdev)
xhci_mtk_ldos_disable(mtk);

disable_pm:
- pm_runtime_put_sync_autosuspend(dev);
+ pm_runtime_put_noidle(dev);
pm_runtime_disable(dev);
return ret;
}
--
2.18.0
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