redonkable
/
alistair23-linux
1
0
Fork 0
Code Releases Activity

binder: fix handling of misaligned binder object 

Fixes crash found by syzbot:
kernel BUG at drivers/android/binder_alloc.c:LINE! (2)

Reported-and-tested-by: syzbot+55de1eb4975dec156d8f@syzkaller.appspotmail.com
Signed-off-by: Todd Kjos <tkjos@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
hifive-unleashed-5.1
Todd Kjos 2019-02-14 15:22:57 -08:00 committed by Greg Kroah-Hartman
parent 36f3093792
commit 26528be672
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/android/binder.c
View File

@ -2057,7 +2057,7 @@ static size_t binder_get_object(struct binder_proc *proc,
size_t object_size = 0;
read_size = min_t(size_t, sizeof(*object), buffer->data_size - offset);
if (read_size < sizeof(*hdr))
if (read_size < sizeof(*hdr) || !IS_ALIGNED(offset, sizeof(u32)))
return 0;
binder_alloc_copy_from_buffer(&proc->alloc, object, buffer,
offset, read_size);