From b9d383ab797f54ae5fa8746117770709921dc529 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Philippe=20Mathieu-Daud=C3=A9?= Date: Wed, 15 Dec 2021 19:24:19 +0100 Subject: [PATCH] hw/intc/arm_gicv3: Check for !MEMTX_OK instead of MEMTX_ERROR MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Quoting Peter Maydell: "These MEMTX_* aren't from the memory transaction API functions; they're just being used by gicd_readl() and friends as a way to indicate a success/failure so that the actual MemoryRegionOps read/write fns like gicv3_dist_read() can log a guest error." We are going to introduce more MemTxResult bits, so it is safer to check for !MEMTX_OK rather than MEMTX_ERROR. Reviewed-by: Peter Xu Reviewed-by: David Hildenbrand Reviewed-by: Peter Maydell Reviewed-by: Stefan Hajnoczi Signed-off-by: Philippe Mathieu-DaudÃf© Signed-off-by: Peter Maydell Signed-off-by: Virendra Thakur CVE: CVE-2021-3750 Upstream-Status: Backport [https://git.qemu.org/?p=qemu.git;a=commit;h=b9d383ab797f54ae5fa8746117770709921dc529] --- hw/intc/arm_gicv3_redist.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/intc/arm_gicv3_redist.c b/hw/intc/arm_gicv3_redist.c index c8ff3ec..99b11ca 100644 --- a/hw/intc/arm_gicv3_redist.c +++ b/hw/intc/arm_gicv3_redist.c @@ -462,7 +462,7 @@ MemTxResult gicv3_redist_read(void *opaque, hwaddr offset, uint64_t *data, break; } - if (r == MEMTX_ERROR) { + if (r != MEMTX_OK) { qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid guest read at offset " TARGET_FMT_plx " size %u\n", __func__, offset, size); @@ -521,7 +521,7 @@ MemTxResult gicv3_redist_write(void *opaque, hwaddr offset, uint64_t data, break; } - if (r == MEMTX_ERROR) { + if (r != MEMTX_OK) { qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid guest write at offset " TARGET_FMT_plx " size %u\n", __func__, offset, size); -- 1.8.3.1