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-rw-r--r--linux-user/syscall.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 7a50a57d4b..efcc17a3b0 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -5008,6 +5008,11 @@ static abi_long do_ioctl_dm(const IOCTLEntry *ie, uint8_t *buf_temp, int fd,
host_data = (char*)host_dm + host_dm->data_start;
argptr = lock_user(VERIFY_READ, guest_data, guest_data_size, 1);
+ if (!argptr) {
+ ret = -TARGET_EFAULT;
+ goto out;
+ }
+
switch (ie->host_cmd) {
case DM_REMOVE_ALL:
case DM_LIST_DEVICES:
@@ -11271,6 +11276,10 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
case TARGET_NR_mq_unlink:
p = lock_user_string(arg1 - 1);
+ if (!p) {
+ ret = -TARGET_EFAULT;
+ break;
+ }
ret = get_errno(mq_unlink(p));
unlock_user (p, arg1, 0);
break;