From 813b59e8b8ab5d284672e0bbd79173df2e25e01d Mon Sep 17 00:00:00 2001 From: Zheyu Ma Date: Tue, 18 Jun 2024 15:56:10 +0200 Subject: hw/usb/hcd-dwc2: Handle invalid address access in read and write functions This commit modifies the dwc2_hsotg_read() and dwc2_hsotg_write() functions to handle invalid address access gracefully. Instead of using g_assert_not_reached(), which causes the program to abort, the functions now log an error message and return a default value for reads or do nothing for writes. This change prevents the program from aborting and provides clear log messages indicating when an invalid memory address is accessed. Reproducer: cat << EOF | qemu-system-aarch64 -display none \ -machine accel=qtest, -m 512M -machine raspi2b -m 1G -nodefaults \ -usb -drive file=null-co://,if=none,format=raw,id=disk0 -device \ usb-storage,port=1,drive=disk0 -qtest stdio readl 0x3f980dfb EOF Signed-off-by: Zheyu Ma Reviewed-by: Paul Zimmerman Message-id: 20240618135610.3109175-1-zheyuma97@gmail.com Signed-off-by: Peter Maydell --- hw/usb/hcd-dwc2.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'hw') diff --git a/hw/usb/hcd-dwc2.c b/hw/usb/hcd-dwc2.c index 8cac9c0a06..b4f0652c7d 100644 --- a/hw/usb/hcd-dwc2.c +++ b/hw/usb/hcd-dwc2.c @@ -1128,7 +1128,10 @@ static uint64_t dwc2_hsotg_read(void *ptr, hwaddr addr, unsigned size) val = dwc2_pcgreg_read(ptr, addr, (addr - HSOTG_REG(0xe00)) >> 2, size); break; default: - g_assert_not_reached(); + qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%"HWADDR_PRIx"\n", + __func__, addr); + val = 0; + break; } return val; @@ -1160,7 +1163,9 @@ static void dwc2_hsotg_write(void *ptr, hwaddr addr, uint64_t val, dwc2_pcgreg_write(ptr, addr, (addr - HSOTG_REG(0xe00)) >> 2, val, size); break; default: - g_assert_not_reached(); + qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad offset 0x%"HWADDR_PRIx"\n", + __func__, addr); + break; } } -- cgit v1.2.3