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[msan] Allow uninitialized padding in struct msghdr. 

llvm-svn: 273204
This commit is contained in:
Evgeniy Stepanov 2016-06-20 21:44:14 +00:00
parent 8b65e86661
commit 843b651398
2 changed files with 13 additions and 2 deletions
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11
compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
View File

@ -2501,7 +2501,16 @@ INTERCEPTOR(SSIZE_T, recvmsg, int fd, struct __sanitizer_msghdr *msg,
#if SANITIZER_INTERCEPT_SENDMSG
static void read_msghdr(void *ctx, struct __sanitizer_msghdr *msg,
SSIZE_T maxlen) {
COMMON_INTERCEPTOR_READ_RANGE(ctx, msg, sizeof(*msg));
#define R(f) \
COMMON_INTERCEPTOR_READ_RANGE(ctx, &msg->msg_##f, sizeof(msg->msg_##f))
R(name);
R(namelen);
R(iov);
R(iovlen);
R(control);
R(controllen);
R(flags);
#undef R
if (msg->msg_name && msg->msg_namelen)
COMMON_INTERCEPTOR_READ_RANGE(ctx, msg->msg_name, msg->msg_namelen);
if (msg->msg_iov && msg->msg_iovlen)

4
compiler-rt/test/msan/Linux/sendmsg.cc
View File

@ -59,11 +59,13 @@ int main() {
#if defined(SENDMSG)
struct iovec iov[2] = {{buf, 5}, {buf + 5, 5}};
struct msghdr msg;
memset(&msg, 0, sizeof(msg));
msg.msg_name = &serveraddr;
msg.msg_namelen = addrlen;
msg.msg_iov = iov;
msg.msg_iovlen = 2;
msg.msg_control = 0;
msg.msg_controllen = 0;
msg.msg_flags = 0;
#endif
#if defined(SEND)