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| author | Keith Mok <keithmok@google.com> | 2023-10-27 20:11:02 +0000 |
|---|---|---|
| committer | Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com> | 2023-10-27 20:11:02 +0000 |
| commit | c555aa2f9596bead19b44a458f8117e2c92bb32d (patch) | |
| tree | ad0722cb134fc00c7ab4ac7bbab93a98428ba67a | |
| parent | 6f0810ee9f861bdca56fa08ceae56ad89b55fbba (diff) | |
| parent | c23f1b73bcf2e25b19781b565c890bae7f005d28 (diff) | |
| download | native-c555aa2f9596bead19b44a458f8117e2c92bb32d.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: I8e1c1c8577936533c67e4a3290285d62a0656de8
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 |