CVE-2022-50271

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> vhost/vsock: Use kvmalloc/kvfree for larger packets.<br /> <br /> When copying a large file over sftp over vsock, data size is usually 32kB,<br /> and kmalloc seems to fail to try to allocate 32 32kB regions.<br /> <br /> vhost-5837: page allocation failure: order:4, mode:0x24040c0<br /> Call Trace:<br /> [] dump_stack+0x97/0xdb<br /> [] warn_alloc_failed+0x10f/0x138<br /> [] ? __alloc_pages_direct_compact+0x38/0xc8<br /> [] __alloc_pages_nodemask+0x84c/0x90d<br /> [] alloc_kmem_pages+0x17/0x19<br /> [] kmalloc_order_trace+0x2b/0xdb<br /> [] __kmalloc+0x177/0x1f7<br /> [] ? copy_from_iter+0x8d/0x31d<br /> [] vhost_vsock_handle_tx_kick+0x1fa/0x301 [vhost_vsock]<br /> [] vhost_worker+0xf7/0x157 [vhost]<br /> [] kthread+0xfd/0x105<br /> [] ? vhost_dev_set_owner+0x22e/0x22e [vhost]<br /> [] ? flush_kthread_worker+0xf3/0xf3<br /> [] ret_from_fork+0x4e/0x80<br /> [] ? flush_kthread_worker+0xf3/0xf3<br /> <br /> Work around by doing kvmalloc instead.