various fixes (#49)

* libs: libc: math: Fix tanh() math functions
* drivers: mtd: smart: Fix trivial debug message in smartfs
* binfmt: libelf: Fix fd not closed on error
* binfmt: Fix stack memory leak on error
* fs: romfs: Fix private data not free on error
* sched: group: Fix reference after free memory
* sched: clock: Fix clock sync

Fix clock sync when CONFIG_RTC_HIRES is enabled

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;
     }
 

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;
     }
 

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)
     {

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;
     }
 

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

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));
 }

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

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;

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;
     }