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authorThomas Gleixner <tglx@mtd.linutronix.de>2005-11-29 10:57:17 -0500
committerThomas Gleixner <tglx@mtd.linutronix.de>2005-11-29 10:57:17 -0500
commit21eeb7aa116b1f59fc23339521173cbb13e57f1a (patch)
treeaca16132a18dca8c8bf3417d118ad9d98834db32 /fs/jffs2/super.c
parentbc4117f8767203927e78b92e9e5b3ddb71d6a84d (diff)
[JFFS2] Fix the slab cache constructor of 'struct jffs2_inode_info' objects.
JFFS2 initialize f->sem mutex as "locked" in the slab constructor which is a bug. Objects are freed with unlocked f->sem mutex. So, when they allocated again, f->sem is unlocked because the slab cache constructor is not called for them. The constructor is called only once when memory pages are allocated for objects (namely, when the slab layer allocates new slabs). So, sometimes 'struct jffs2_inode_info' are allocated with unlocked f->sem, sometimes with locked. This is a bug. Instead, initialize f->sem as unlocked in the constructor. I.e., in the "constructed" state f->sem must be unlocked. From: Keijiro Yano <keijiro_yano@yahoo.co.jp> Acked-by: Artem B. Bityutskiy <dedekind@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'fs/jffs2/super.c')
-rw-r--r--fs/jffs2/super.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index 9e0b5458d9c0..93883817cbd0 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -51,7 +51,7 @@ static void jffs2_i_init_once(void * foo, kmem_cache_t * cachep, unsigned long f
51 51
52 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == 52 if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
53 SLAB_CTOR_CONSTRUCTOR) { 53 SLAB_CTOR_CONSTRUCTOR) {
54 init_MUTEX_LOCKED(&ei->sem); 54 init_MUTEX(&ei->sem);
55 inode_init_once(&ei->vfs_inode); 55 inode_init_once(&ei->vfs_inode);
56 } 56 }
57} 57}