diff options
| author | Sabyrzhan Tasbolatov <snovitoll@gmail.com> | 2021-02-09 13:26:12 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-09 14:22:32 +0300 |
| commit | 2fd10bcf0310b9525b2af9e1f7aa9ddd87c3772e (patch) | |
| tree | 0222c339dbb528ce09716b557a0f185d7929436c /lib/scatterlist.c | |
| parent | b2c852f490e086e0683d929d8eb75ccae068bd7b (diff) | |
| download | linux-2fd10bcf0310b9525b2af9e1f7aa9ddd87c3772e.tar.xz | |
drivers/misc/vmw_vmci: restrict too big queue size in qp_host_alloc_queue
syzbot found WARNING in qp_broker_alloc[1] in qp_host_alloc_queue()
when num_pages is 0x100001, giving queue_size + queue_page_size
bigger than KMALLOC_MAX_SIZE for kzalloc(), resulting order >= MAX_ORDER
condition.
queue_size + queue_page_size=0x8000d8, where KMALLOC_MAX_SIZE=0x400000.
[1]
Call Trace:
alloc_pages include/linux/gfp.h:547 [inline]
kmalloc_order+0x40/0x130 mm/slab_common.c:837
kmalloc_order_trace+0x15/0x70 mm/slab_common.c:853
kmalloc_large include/linux/slab.h:481 [inline]
__kmalloc+0x257/0x330 mm/slub.c:3959
kmalloc include/linux/slab.h:557 [inline]
kzalloc include/linux/slab.h:682 [inline]
qp_host_alloc_queue drivers/misc/vmw_vmci/vmci_queue_pair.c:540 [inline]
qp_broker_create drivers/misc/vmw_vmci/vmci_queue_pair.c:1351 [inline]
qp_broker_alloc+0x936/0x2740 drivers/misc/vmw_vmci/vmci_queue_pair.c:1739
Reported-by: syzbot+15ec7391f3d6a1a7cc7d@syzkaller.appspotmail.com
Signed-off-by: Sabyrzhan Tasbolatov <snovitoll@gmail.com>
Link: https://lore.kernel.org/r/20210209102612.2112247-1-snovitoll@gmail.com
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'lib/scatterlist.c')
0 files changed, 0 insertions, 0 deletions