Commit-ID: 95bfdf23e4d59099340c01064f39e7f6875c02bc
Gitweb: http://git.kernel.org/tip/95bfdf23e4d59099340c01064f39e7f6875c02bc
Author: Kirill Smelkov <kirr@xxxxxxxxxx>
AuthorDate: Mon, 8 Dec 2014 14:07:59 +0300
Committer: Sasha Levin <sasha.levin@xxxxxxxxxx>
CommitDate: Fri, 19 Dec 2014 15:50:55 -0500
tools/liblockdep: Fix debug_check thinko in mutex destroy
In mutex destroy code currently we pass to debug_check_no_locks_freed()
[mem_from, mem_end)
address region. But debug_check_no_locks_freed() accepts
mem_from, mem_*len*
i.e. second parameter is region length, not end address. And it was
always so, starting from 2006 (fbb9ce95 "lockdep: core").
Fix it, or else on a mutex destroy we wrongly check
much-wider-than-mutex region and can find not-yet-released other locks
there and wrongly report BUGs on them.
Signed-off-by: Kirill Smelkov <kirr@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
---
tools/lib/lockdep/preload.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/tools/lib/lockdep/preload.c b/tools/lib/lockdep/preload.c
index 6f80360..0b0112c 100644
--- a/tools/lib/lockdep/preload.c
+++ b/tools/lib/lockdep/preload.c
@@ -317,7 +317,7 @@ int pthread_mutex_destroy(pthread_mutex_t *mutex)
*
* TODO: Hook into free() and add that check there as well.
*/
- debug_check_no_locks_freed(mutex, mutex + sizeof(*mutex));
+ debug_check_no_locks_freed(mutex, sizeof(*mutex));
__del_lock(__get_lock(mutex));
return ll_pthread_mutex_destroy(mutex);
}
@@ -341,7 +341,7 @@ int pthread_rwlock_destroy(pthread_rwlock_t *rwlock)
{
try_init_preload();
- debug_check_no_locks_freed(rwlock, rwlock + sizeof(*rwlock));
+ debug_check_no_locks_freed(rwlock, sizeof(*rwlock));
__del_lock(__get_lock(rwlock));
return ll_pthread_rwlock_destroy(rwlock);
}
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