diff options
Diffstat (limited to 'linux-user/syscall.c')
| -rw-r--r-- | linux-user/syscall.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 8b2d39fe73..ad06ec7bd5 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -8679,16 +8679,21 @@ static abi_long do_syscall1(CPUArchState *cpu_env, int num, abi_long arg1, #if defined(__NR_pidfd_send_signal) && defined(TARGET_NR_pidfd_send_signal) case TARGET_NR_pidfd_send_signal: { - siginfo_t uinfo; + siginfo_t uinfo, *puinfo; - p = lock_user(VERIFY_READ, arg3, sizeof(target_siginfo_t), 1); - if (!p) { - return -TARGET_EFAULT; + if (arg3) { + p = lock_user(VERIFY_READ, arg3, sizeof(target_siginfo_t), 1); + if (!p) { + return -TARGET_EFAULT; + } + target_to_host_siginfo(&uinfo, p); + unlock_user(p, arg3, 0); + puinfo = &uinfo; + } else { + puinfo = NULL; } - target_to_host_siginfo(&uinfo, p); - unlock_user(p, arg3, 0); ret = get_errno(pidfd_send_signal(arg1, target_to_host_signal(arg2), - &uinfo, arg4)); + puinfo, arg4)); } return ret; #endif |