diff options
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 3e88dd129c..c1d6f76814 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -11583,17 +11583,22 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, case TARGET_NR_mq_open: { struct mq_attr posix_mq_attr; + struct mq_attr *pposix_mq_attr; int host_flags; host_flags = target_to_host_bitmask(arg2, fcntl_flags_tbl); - if (copy_from_user_mq_attr(&posix_mq_attr, arg4) != 0) { - goto efault; + pposix_mq_attr = NULL; + if (arg4) { + if (copy_from_user_mq_attr(&posix_mq_attr, arg4) != 0) { + goto efault; + } + pposix_mq_attr = &posix_mq_attr; } p = lock_user_string(arg1 - 1); if (!p) { goto efault; } - ret = get_errno(mq_open(p, host_flags, arg3, &posix_mq_attr)); + ret = get_errno(mq_open(p, host_flags, arg3, pposix_mq_attr)); unlock_user (p, arg1, 0); } break; |