From: Jarek Poplawski - numeric string size replaced with constant in print_lock_name and print_lockdep_cache, - return on null pointer in print_lock_dependencies, - one more lockdep return with 0 with unlocking fix in mark_lock. Signed-off-by: Jarek Poplawski Cc: Ingo Molnar Signed-off-by: Andrew Morton --- kernel/lockdep.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff -puN kernel/lockdep.c~lockdep-misc-fixes-in-lockdepc kernel/lockdep.c --- a/kernel/lockdep.c~lockdep-misc-fixes-in-lockdepc +++ a/kernel/lockdep.c @@ -359,7 +359,7 @@ get_usage_chars(struct lock_class *class static void print_lock_name(struct lock_class *class) { - char str[128], c1, c2, c3, c4; + char str[KSYM_NAME_LEN + 1], c1, c2, c3, c4; const char *name; get_usage_chars(class, &c1, &c2, &c3, &c4); @@ -381,7 +381,7 @@ static void print_lock_name(struct lock_ static void print_lockdep_cache(struct lockdep_map *lock) { const char *name; - char str[128]; + char str[KSYM_NAME_LEN + 1]; name = lock->name; if (!name) @@ -451,7 +451,9 @@ static void print_lock_dependencies(stru print_lock_class_header(class, depth); list_for_each_entry(entry, &class->locks_after, entry) { - DEBUG_LOCKS_WARN_ON(!entry->class); + if (DEBUG_LOCKS_WARN_ON(!entry->class)) + return; + print_lock_dependencies(entry->class, depth + 1); printk("%*s ... acquired at:\n",depth,""); @@ -1733,6 +1735,7 @@ static int mark_lock(struct task_struct debug_atomic_dec(&nr_unused_locks); break; default: + __raw_spin_unlock(&hash_lock); debug_locks_off(); WARN_ON(1); return 0; _