diff options
author | Keith Mok <keithmok@google.com> | 2023-10-27 20:10:52 +0000 |
---|---|---|
committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | 2023-10-27 20:10:52 +0000 |
commit | 99785d0473407e38e18084e2bbf040d12e57beee (patch) | |
tree | d17dfd45cb0ad59e6a395cb7bb3d0b33a4cafecb | |
parent | 35388a2d763833c86682850c15f63a0917e78c6d (diff) | |
parent | c23f1b73bcf2e25b19781b565c890bae7f005d28 (diff) | |
download | native-99785d0473407e38e18084e2bbf040d12e57beee.tar.gz |
Merge "File size seal for memory mapped region" into tm-dev am: c23f1b73bc
Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/24776199
Change-Id: I8760992075ba6aa04024590f1eaf08434539a853
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
-rw-r--r-- | libs/binder/MemoryHeapBase.cpp | 4 | ||||
-rw-r--r-- | libs/binder/tests/binderMemoryHeapBaseUnitTest.cpp | 13 |
2 files changed, 11 insertions, 6 deletions
diff --git a/libs/binder/MemoryHeapBase.cpp b/libs/binder/MemoryHeapBase.cpp index 8132d46940..0968b89eae 100644 --- a/libs/binder/MemoryHeapBase.cpp +++ b/libs/binder/MemoryHeapBase.cpp @@ -73,8 +73,8 @@ MemoryHeapBase::MemoryHeapBase(size_t size, uint32_t flags, char const * name) ALOGV("MemoryHeapBase: Attempting to force MemFD"); fd = memfd_create_region(name ? name : "MemoryHeapBase", size); if (fd < 0 || (mapfd(fd, true, size) != NO_ERROR)) return; - const int SEAL_FLAGS = ((mFlags & READ_ONLY) ? F_SEAL_FUTURE_WRITE : 0) | - ((mFlags & MEMFD_ALLOW_SEALING) ? 0 : F_SEAL_SEAL); + const int SEAL_FLAGS = ((mFlags & READ_ONLY) ? F_SEAL_FUTURE_WRITE : 0) | F_SEAL_GROW | + F_SEAL_SHRINK | ((mFlags & MEMFD_ALLOW_SEALING) ? 0 : F_SEAL_SEAL); if (SEAL_FLAGS && (fcntl(fd, F_ADD_SEALS, SEAL_FLAGS) == -1)) { ALOGE("MemoryHeapBase: MemFD %s sealing with flags %x failed with error %s", name, SEAL_FLAGS, strerror(errno)); diff --git a/libs/binder/tests/binderMemoryHeapBaseUnitTest.cpp b/libs/binder/tests/binderMemoryHeapBaseUnitTest.cpp index 21cb70be17..7d19fd4cff 100644 --- a/libs/binder/tests/binderMemoryHeapBaseUnitTest.cpp +++ b/libs/binder/tests/binderMemoryHeapBaseUnitTest.cpp @@ -35,7 +35,8 @@ TEST(MemoryHeapBase, MemfdSealed) { "Test mapping"); int fd = mHeap->getHeapID(); EXPECT_NE(fd, -1); - EXPECT_EQ(fcntl(fd, F_GET_SEALS), F_SEAL_SEAL); + EXPECT_EQ(fcntl(fd, F_GET_SEALS), F_SEAL_GROW | F_SEAL_SHRINK | F_SEAL_SEAL); + EXPECT_EQ(ftruncate(fd, 4096), -1); } TEST(MemoryHeapBase, MemfdUnsealed) { @@ -45,7 +46,8 @@ TEST(MemoryHeapBase, MemfdUnsealed) { "Test mapping"); int fd = mHeap->getHeapID(); EXPECT_NE(fd, -1); - EXPECT_EQ(fcntl(fd, F_GET_SEALS), 0); + EXPECT_EQ(fcntl(fd, F_GET_SEALS), F_SEAL_GROW | F_SEAL_SHRINK); + EXPECT_EQ(ftruncate(fd, 4096), -1); } TEST(MemoryHeapBase, MemfdSealedProtected) { @@ -55,7 +57,9 @@ TEST(MemoryHeapBase, MemfdSealedProtected) { "Test mapping"); int fd = mHeap->getHeapID(); EXPECT_NE(fd, -1); - EXPECT_EQ(fcntl(fd, F_GET_SEALS), F_SEAL_SEAL | F_SEAL_FUTURE_WRITE); + EXPECT_EQ(fcntl(fd, F_GET_SEALS), + F_SEAL_GROW | F_SEAL_SHRINK | F_SEAL_SEAL | F_SEAL_FUTURE_WRITE); + EXPECT_EQ(ftruncate(fd, 4096), -1); } TEST(MemoryHeapBase, MemfdUnsealedProtected) { @@ -66,7 +70,8 @@ TEST(MemoryHeapBase, MemfdUnsealedProtected) { "Test mapping"); int fd = mHeap->getHeapID(); EXPECT_NE(fd, -1); - EXPECT_EQ(fcntl(fd, F_GET_SEALS), F_SEAL_FUTURE_WRITE); + EXPECT_EQ(fcntl(fd, F_GET_SEALS), F_SEAL_GROW | F_SEAL_SHRINK | F_SEAL_FUTURE_WRITE); + EXPECT_EQ(ftruncate(fd, 4096), -1); } #else |