diff --git a/binfmt/binfmt_execmodule.c b/binfmt/binfmt_execmodule.c
index b091b20a98b..6ccd9f722a8 100644
--- a/binfmt/binfmt_execmodule.c
+++ b/binfmt/binfmt_execmodule.c
@@ -186,6 +186,7 @@ int exec_module(FAR const struct binary_s *binp)
     {
       ret = -get_errno();
       berr("task_init() failed: %d\n", ret);
+      kumm_free(stack);
       goto errout_with_addrenv;
     }
 
diff --git a/binfmt/libelf/libelf_init.c b/binfmt/libelf/libelf_init.c
index 97be242197f..11223f75e36 100644
--- a/binfmt/libelf/libelf_init.c
+++ b/binfmt/libelf/libelf_init.c
@@ -176,6 +176,7 @@ int elf_init(FAR const char *filename, FAR struct elf_loadinfo_s *loadinfo)
   if (ret < 0)
     {
       berr("Failed to read ELF header: %d\n", ret);
+      close(loadinfo->filfd);
       return ret;
     }
 
@@ -194,6 +195,7 @@ int elf_init(FAR const char *filename, FAR struct elf_loadinfo_s *loadinfo)
        */
 
       berr("Bad ELF header: %d\n", ret);
+      close(loadinfo->filfd);
       return ret;
     }
 
diff --git a/drivers/mtd/smart.c b/drivers/mtd/smart.c
index 68debd681e3..ecd8a1a8f5b 100644
--- a/drivers/mtd/smart.c
+++ b/drivers/mtd/smart.c
@@ -4988,7 +4988,7 @@ static inline int smart_allocsector(FAR struct smart_struct_s *dev,
   physicalsector = smart_findfreephyssector(dev, FALSE);
   finfo("Alloc: log=%d, phys=%d, erase block=%d, free=%d, released=%d\n",
           logsector, physicalsector, physicalsector /
-          dev->sectorsPerBlk, dev->freesectors, dev->releasecount);
+          dev->sectorsPerBlk, dev->freesectors, dev->releasesectors);
 
   if (physicalsector == 0xffff)
     {
diff --git a/fs/romfs/fs_romfs.c b/fs/romfs/fs_romfs.c
index 81c8630abe4..b805d0757ef 100644
--- a/fs/romfs/fs_romfs.c
+++ b/fs/romfs/fs_romfs.c
@@ -268,6 +268,7 @@ static int romfs_open(FAR struct file *filep, FAR const char *relpath,
   if (ret < 0)
     {
       ferr("ERROR: Failed to locate start of file data: %d\n", ret);
+      kmm_free(rf);
       goto errout_with_semaphore;
     }
 
@@ -277,6 +278,7 @@ static int romfs_open(FAR struct file *filep, FAR const char *relpath,
   if (ret < 0)
     {
       ferr("ERROR: Failed configure buffering: %d\n", ret);
+      kmm_free(rf);
       goto errout_with_semaphore;
     }
 
diff --git a/libs/libc/math/lib_tanh.c b/libs/libc/math/lib_tanh.c
index 4cbaf3d7d50..85dce6df5f6 100644
--- a/libs/libc/math/lib_tanh.c
+++ b/libs/libc/math/lib_tanh.c
@@ -44,6 +44,6 @@ double tanh(double x)
   double x0 = exp(x);
   double x1 = 1.0 / x0;
 
-  return ((x0 + x1) / (x0 - x1));
+  return ((x0 - x1) / (x0 + x1));
 }
 #endif
diff --git a/libs/libc/math/lib_tanhf.c b/libs/libc/math/lib_tanhf.c
index e3df3774b7e..8db236abf8f 100644
--- a/libs/libc/math/lib_tanhf.c
+++ b/libs/libc/math/lib_tanhf.c
@@ -40,5 +40,5 @@ float tanhf(float x)
   float x0 = expf(x);
   float x1 = 1.0F / x0;
 
-  return ((x0 + x1) / (x0 - x1));
+  return ((x0 - x1) / (x0 + x1));
 }
diff --git a/libs/libc/math/lib_tanhl.c b/libs/libc/math/lib_tanhl.c
index 4303ea178e8..a03c000ef7d 100644
--- a/libs/libc/math/lib_tanhl.c
+++ b/libs/libc/math/lib_tanhl.c
@@ -44,6 +44,6 @@ long double tanhl(long double x)
   long double x0 = exp(x);
   long double x1 = 1.0 / x0;
 
-  return ((x0 + x1) / (x0 - x1));
+  return ((x0 - x1) / (x0 + x1));
 }
 #endif
diff --git a/sched/clock/clock_initialize.c b/sched/clock/clock_initialize.c
index 011f514f47f..116b0bc877c 100644
--- a/sched/clock/clock_initialize.c
+++ b/sched/clock/clock_initialize.c
@@ -175,9 +175,7 @@ static void clock_inittime(void)
   /* (Re-)initialize the time value to match the RTC */
 
 #ifndef CONFIG_CLOCK_TIMEKEEPING
-#ifndef CONFIG_RTC_HIRES
   clock_basetime(&g_basetime);
-#endif
 
 #ifndef CONFIG_SCHED_TICKLESS
   g_system_timer = INITIAL_SYSTEM_TIMER_TICKS;
diff --git a/sched/group/group_create.c b/sched/group/group_create.c
index 6f6afaacc19..67eb186ff2b 100644
--- a/sched/group/group_create.c
+++ b/sched/group/group_create.c
@@ -343,6 +343,7 @@ int group_initialize(FAR struct task_tcb_s *tcb)
   if (!group->tg_members)
     {
       kmm_free(group);
+      tcb->cmn.group = NULL;
       return -ENOMEM;
     }