From 7f85c16f40d8be5656fb3476909db5c3a5a9c6ea Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Tue, 17 Aug 2021 16:36:23 +0800 Subject: usb: xhci-mtk: fix use-after-free of mtk->hcd 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 Signed-off-by: Chunfeng Yun Link: https://lore.kernel.org/r/1629189389-18779-3-git-send-email-chunfeng.yun@mediatek.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-mtk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/usb/host/xhci-mtk.c') diff --git a/drivers/usb/host/xhci-mtk.c b/drivers/usb/host/xhci-mtk.c index 2548976bcf05..cb27569186a0 100644 --- a/drivers/usb/host/xhci-mtk.c +++ b/drivers/usb/host/xhci-mtk.c @@ -569,7 +569,7 @@ disable_ldos: xhci_mtk_ldos_disable(mtk); disable_pm: - pm_runtime_put_sync_autosuspend(dev); + pm_runtime_put_noidle(dev); pm_runtime_disable(dev); return ret; } -- cgit v1.2.3