diff --git a/libmeminfo/libmeminfo_test.cpp b/libmeminfo/libmeminfo_test.cpp
index e689a2679..7d85dd239 100644
--- a/libmeminfo/libmeminfo_test.cpp
+++ b/libmeminfo/libmeminfo_test.cpp
@@ -293,15 +293,6 @@ TEST(TestProcMemInfo, IsSmapsSupportedTest) {
     EXPECT_EQ(supported, IsSmapsRollupSupported(-1));
 }
 
-TEST(TestProcMemInfo, SmapsOrRollupReturn) {
-    // if /proc/<pid>/smaps_rollup file exists, .SmapsRollup() must return true;
-    // false otherwise
-    std::string path = ::android::base::StringPrintf("/proc/%d/smaps_rollup", pid);
-    ProcMemInfo proc_mem(pid);
-    MemUsage stats;
-    EXPECT_EQ(!access(path.c_str(), F_OK), proc_mem.SmapsOrRollup(&stats));
-}
-
 TEST(TestProcMemInfo, SmapsOrRollupTest) {
     std::string rollup =
             R"rollup(12c00000-7fe859e000 ---p 00000000 00:00 0                                [rollup]
diff --git a/libmeminfo/procmeminfo.cpp b/libmeminfo/procmeminfo.cpp
index 347a293a9..d6332a32e 100644
--- a/libmeminfo/procmeminfo.cpp
+++ b/libmeminfo/procmeminfo.cpp
@@ -406,9 +406,10 @@ bool SmapsOrRollupFromFile(const std::string& path, MemUsage* stats) {
         return false;
     }
 
-    char line[1024];
+    char* line = nullptr;
+    size_t line_alloc = 0;
     stats->clear();
-    while (fgets(line, sizeof(line), fp.get()) != nullptr) {
+    while (getline(&line, &line_alloc, fp.get()) > 0) {
         switch (line[0]) {
             case 'P':
                 if (strncmp(line, "Pss:", 4) == 0) {
@@ -441,6 +442,8 @@ bool SmapsOrRollupFromFile(const std::string& path, MemUsage* stats) {
         }
     }
 
+    // free getline() managed buffer
+    free(line);
     return true;
 }
 
@@ -450,14 +453,17 @@ bool SmapsOrRollupPssFromFile(const std::string& path, uint64_t* pss) {
         return false;
     }
     *pss = 0;
-    char line[1024];
-    while (fgets(line, sizeof(line), fp.get()) != nullptr) {
+    char* line = nullptr;
+    size_t line_alloc = 0;
+    while (getline(&line, &line_alloc, fp.get()) > 0) {
         uint64_t v;
         if (sscanf(line, "Pss: %" SCNu64 " kB", &v) == 1) {
             *pss += v;
         }
     }
 
+    // free getline() managed buffer
+    free(line);
     return true;
 }