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android: binder: fixup crash introduced by moving buffer hdr

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Fix crash introduced by 74310e06be
(android: binder: Move buffer out of area shared with user space)
when close is called after open without mmap in between.

Reported-by: kernel test robot <fengguang.wu@intel.com>
Fixes: 74310e06be ("android: binder: Move buffer out of area shared with user space")
Signed-off-by: Sherry Yang <sherryy@android.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sherry Yang 2017-08-31 10:26:06 -07:00 committed by Greg Kroah-Hartman
parent a97db8818c
commit 957ccc2bc8
1 changed files with 1 additions and 1 deletions
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2
drivers/android/binder_alloc.c
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@ -713,7 +713,6 @@ int binder_alloc_mmap_handler(struct binder_alloc *alloc,
}
buffer->data = alloc->buffer;
INIT_LIST_HEAD(&alloc->buffers);
list_add(&buffer->entry, &alloc->buffers);
buffer->free = 1;
binder_insert_free_buffer(alloc, buffer);
@ -972,6 +971,7 @@ void binder_alloc_init(struct binder_alloc *alloc)
alloc->tsk = current->group_leader;
alloc->pid = current->group_leader->pid;
mutex_init(&alloc->mutex);
INIT_LIST_HEAD(&alloc->buffers);
}
void binder_alloc_shrinker_init(void)