From 50475f1511964775ff73c2b07239c3ff571f75cd Mon Sep 17 00:00:00 2001 From: Jeuk Kim Date: Tue, 9 Jul 2024 20:53:49 +0900 Subject: hw/ufs: Fix mcq register range check logic The function ufs_is_mcq_reg() and ufs_is_mcq_op_reg() only evaluated the range of the mcq_reg and mcq_op_reg offset, which is defined as a constant. Therefore, it was possible for them to return true even though the ufs device is configured to not support the mcq. This could cause ufs_mmio_read()/ufs_mmio_write() to result in Null-pointer-dereference. So fix it. Resolves: #2428 Fixes: 5c079578d2e4 ("hw/ufs: Add support MCQ of UFSHCI 4.0") Reported-by: Zheyu Ma Signed-off-by: Jeuk Kim Reviewed-by: Minwoo Im --- hw/ufs/ufs.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/hw/ufs/ufs.c b/hw/ufs/ufs.c index 683fff5840..945a0ea127 100644 --- a/hw/ufs/ufs.c +++ b/hw/ufs/ufs.c @@ -57,14 +57,26 @@ static inline uint64_t ufs_reg_size(UfsHc *u) static inline bool ufs_is_mcq_reg(UfsHc *u, uint64_t addr, unsigned size) { - uint64_t mcq_reg_addr = ufs_mcq_reg_addr(u, 0); + uint64_t mcq_reg_addr; + + if (!u->params.mcq) { + return false; + } + + mcq_reg_addr = ufs_mcq_reg_addr(u, 0); return (addr >= mcq_reg_addr && addr + size <= mcq_reg_addr + sizeof(u->mcq_reg)); } static inline bool ufs_is_mcq_op_reg(UfsHc *u, uint64_t addr, unsigned size) { - uint64_t mcq_op_reg_addr = ufs_mcq_op_reg_addr(u, 0); + uint64_t mcq_op_reg_addr; + + if (!u->params.mcq) { + return false; + } + + mcq_op_reg_addr = ufs_mcq_op_reg_addr(u, 0); return (addr >= mcq_op_reg_addr && addr + size <= mcq_op_reg_addr + sizeof(u->mcq_op_reg)); } -- cgit v1.2.3