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-rw-r--r--test/syscalls/linux/partial_bad_buffer.cc138
1 files changed, 64 insertions, 74 deletions
diff --git a/test/syscalls/linux/partial_bad_buffer.cc b/test/syscalls/linux/partial_bad_buffer.cc
index 33822ee57..df7129acc 100644
--- a/test/syscalls/linux/partial_bad_buffer.cc
+++ b/test/syscalls/linux/partial_bad_buffer.cc
@@ -18,7 +18,9 @@
#include <netinet/tcp.h>
#include <sys/mman.h>
#include <sys/socket.h>
+#include <sys/stat.h>
#include <sys/syscall.h>
+#include <sys/types.h>
#include <sys/uio.h>
#include <unistd.h>
@@ -62,9 +64,9 @@ class PartialBadBufferTest : public ::testing::Test {
// Write some initial data.
size_t size = sizeof(kMessage) - 1;
EXPECT_THAT(WriteFd(fd_, &kMessage, size), SyscallSucceedsWithValue(size));
-
ASSERT_THAT(lseek(fd_, 0, SEEK_SET), SyscallSucceeds());
+ // Map a useable buffer.
addr_ = mmap(0, 2 * kPageSize, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
ASSERT_NE(addr_, MAP_FAILED);
@@ -79,6 +81,15 @@ class PartialBadBufferTest : public ::testing::Test {
bad_buffer_ = buf + kPageSize - 1;
}
+ off_t Size() {
+ struct stat st;
+ int rc = fstat(fd_, &st);
+ if (rc < 0) {
+ return static_cast<off_t>(rc);
+ }
+ return st.st_size;
+ }
+
void TearDown() override {
EXPECT_THAT(munmap(addr_, 2 * kPageSize), SyscallSucceeds()) << addr_;
EXPECT_THAT(close(fd_), SyscallSucceeds());
@@ -165,97 +176,99 @@ TEST_F(PartialBadBufferTest, PreadvSmall) {
}
TEST_F(PartialBadBufferTest, WriteBig) {
- // FIXME(b/24788078): The sentry write syscalls will return immediately
- // if Access returns an error, but Access may not return an error
- // and the sentry will instead perform a partial write.
- SKIP_IF(IsRunningOnGvisor());
+ off_t orig_size = Size();
+ int n;
- EXPECT_THAT(RetryEINTR(write)(fd_, bad_buffer_, kPageSize),
- SyscallFailsWithErrno(EFAULT));
+ ASSERT_THAT(lseek(fd_, orig_size, SEEK_SET), SyscallSucceeds());
+ EXPECT_THAT(
+ (n = RetryEINTR(write)(fd_, bad_buffer_, kPageSize)),
+ AnyOf(SyscallFailsWithErrno(EFAULT), SyscallSucceedsWithValue(1)));
+ EXPECT_EQ(Size(), orig_size + (n >= 0 ? n : 0));
}
TEST_F(PartialBadBufferTest, WriteSmall) {
- // FIXME(b/24788078): The sentry write syscalls will return immediately
- // if Access returns an error, but Access may not return an error
- // and the sentry will instead perform a partial write.
- SKIP_IF(IsRunningOnGvisor());
+ off_t orig_size = Size();
+ int n;
- EXPECT_THAT(RetryEINTR(write)(fd_, bad_buffer_, 10),
- SyscallFailsWithErrno(EFAULT));
+ ASSERT_THAT(lseek(fd_, orig_size, SEEK_SET), SyscallSucceeds());
+ EXPECT_THAT(
+ (n = RetryEINTR(write)(fd_, bad_buffer_, 10)),
+ AnyOf(SyscallFailsWithErrno(EFAULT), SyscallSucceedsWithValue(1)));
+ EXPECT_EQ(Size(), orig_size + (n >= 0 ? n : 0));
}
TEST_F(PartialBadBufferTest, PwriteBig) {
- // FIXME(b/24788078): The sentry write syscalls will return immediately
- // if Access returns an error, but Access may not return an error
- // and the sentry will instead perform a partial write.
- SKIP_IF(IsRunningOnGvisor());
+ off_t orig_size = Size();
+ int n;
- EXPECT_THAT(RetryEINTR(pwrite)(fd_, bad_buffer_, kPageSize, 0),
- SyscallFailsWithErrno(EFAULT));
+ EXPECT_THAT(
+ (n = RetryEINTR(pwrite)(fd_, bad_buffer_, kPageSize, orig_size)),
+ AnyOf(SyscallFailsWithErrno(EFAULT), SyscallSucceedsWithValue(1)));
+ EXPECT_EQ(Size(), orig_size + (n >= 0 ? n : 0));
}
TEST_F(PartialBadBufferTest, PwriteSmall) {
- // FIXME(b/24788078): The sentry write syscalls will return immediately
- // if Access returns an error, but Access may not return an error
- // and the sentry will instead perform a partial write.
- SKIP_IF(IsRunningOnGvisor());
+ off_t orig_size = Size();
+ int n;
- EXPECT_THAT(RetryEINTR(pwrite)(fd_, bad_buffer_, 10, 0),
- SyscallFailsWithErrno(EFAULT));
+ EXPECT_THAT(
+ (n = RetryEINTR(pwrite)(fd_, bad_buffer_, 10, orig_size)),
+ AnyOf(SyscallFailsWithErrno(EFAULT), SyscallSucceedsWithValue(1)));
+ EXPECT_EQ(Size(), orig_size + (n >= 0 ? n : 0));
}
TEST_F(PartialBadBufferTest, WritevBig) {
- // FIXME(b/24788078): The sentry write syscalls will return immediately
- // if Access returns an error, but Access may not return an error
- // and the sentry will instead perform a partial write.
- SKIP_IF(IsRunningOnGvisor());
-
struct iovec vec;
vec.iov_base = bad_buffer_;
vec.iov_len = kPageSize;
+ off_t orig_size = Size();
+ int n;
- EXPECT_THAT(RetryEINTR(writev)(fd_, &vec, 1), SyscallFailsWithErrno(EFAULT));
+ ASSERT_THAT(lseek(fd_, orig_size, SEEK_SET), SyscallSucceeds());
+ EXPECT_THAT(
+ (n = RetryEINTR(writev)(fd_, &vec, 1)),
+ AnyOf(SyscallFailsWithErrno(EFAULT), SyscallSucceedsWithValue(1)));
+ EXPECT_EQ(Size(), orig_size + (n >= 0 ? n : 0));
}
TEST_F(PartialBadBufferTest, WritevSmall) {
- // FIXME(b/24788078): The sentry write syscalls will return immediately
- // if Access returns an error, but Access may not return an error
- // and the sentry will instead perform a partial write.
- SKIP_IF(IsRunningOnGvisor());
-
struct iovec vec;
vec.iov_base = bad_buffer_;
vec.iov_len = 10;
+ off_t orig_size = Size();
+ int n;
- EXPECT_THAT(RetryEINTR(writev)(fd_, &vec, 1), SyscallFailsWithErrno(EFAULT));
+ ASSERT_THAT(lseek(fd_, orig_size, SEEK_SET), SyscallSucceeds());
+ EXPECT_THAT(
+ (n = RetryEINTR(writev)(fd_, &vec, 1)),
+ AnyOf(SyscallFailsWithErrno(EFAULT), SyscallSucceedsWithValue(1)));
+ EXPECT_EQ(Size(), orig_size + (n >= 0 ? n : 0));
}
TEST_F(PartialBadBufferTest, PwritevBig) {
- // FIXME(b/24788078): The sentry write syscalls will return immediately
- // if Access returns an error, but Access may not return an error
- // and the sentry will instead perform a partial write.
- SKIP_IF(IsRunningOnGvisor());
-
struct iovec vec;
vec.iov_base = bad_buffer_;
vec.iov_len = kPageSize;
+ off_t orig_size = Size();
+ int n;
- EXPECT_THAT(RetryEINTR(pwritev)(fd_, &vec, 1, 0),
- SyscallFailsWithErrno(EFAULT));
+ EXPECT_THAT(
+ (n = RetryEINTR(pwritev)(fd_, &vec, 1, orig_size)),
+ AnyOf(SyscallFailsWithErrno(EFAULT), SyscallSucceedsWithValue(1)));
+ EXPECT_EQ(Size(), orig_size + (n >= 0 ? n : 0));
}
TEST_F(PartialBadBufferTest, PwritevSmall) {
- // FIXME(b/24788078): The sentry write syscalls will return immediately
- // if Access returns an error, but Access may not return an error
- // and the sentry will instead perform a partial write.
- SKIP_IF(IsRunningOnGvisor());
-
struct iovec vec;
vec.iov_base = bad_buffer_;
vec.iov_len = 10;
+ off_t orig_size = Size();
+ int n;
- EXPECT_THAT(RetryEINTR(pwritev)(fd_, &vec, 1, 0),
- SyscallFailsWithErrno(EFAULT));
+ EXPECT_THAT(
+ (n = RetryEINTR(pwritev)(fd_, &vec, 1, orig_size)),
+ AnyOf(SyscallFailsWithErrno(EFAULT), SyscallSucceedsWithValue(1)));
+ EXPECT_EQ(Size(), orig_size + (n >= 0 ? n : 0));
}
// getdents returns EFAULT when the you claim the buffer is large enough, but
@@ -283,29 +296,6 @@ TEST_F(PartialBadBufferTest, GetdentsOneEntry) {
SyscallSucceedsWithValue(Gt(0)));
}
-// Verify that when write returns EFAULT the kernel hasn't silently written
-// the initial valid bytes.
-TEST_F(PartialBadBufferTest, WriteEfaultIsntPartial) {
- // FIXME(b/24788078): The sentry write syscalls will return immediately
- // if Access returns an error, but Access may not return an error
- // and the sentry will instead perform a partial write.
- SKIP_IF(IsRunningOnGvisor());
-
- bad_buffer_[0] = 'A';
- EXPECT_THAT(RetryEINTR(write)(fd_, bad_buffer_, 10),
- SyscallFailsWithErrno(EFAULT));
-
- size_t size = 255;
- char buf[255];
- memset(buf, 0, size);
-
- EXPECT_THAT(RetryEINTR(pread)(fd_, buf, size, 0),
- SyscallSucceedsWithValue(sizeof(kMessage) - 1));
-
- // 'A' has not been written.
- EXPECT_STREQ(buf, kMessage);
-}
-
PosixErrorOr<sockaddr_storage> InetLoopbackAddr(int family) {
struct sockaddr_storage addr;
memset(&addr, 0, sizeof(addr));
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-24 06:49:17 +0000