vhost/vsock: Use kvmalloc/kvfree for larger packets.
Description
In the Linux kernel, the following vulnerability has been resolved:
vhost/vsock: Use kvmalloc/kvfree for larger packets.
When copying a large file over sftp over vsock, data size is usually 32kB, and kmalloc seems to fail to try to allocate 32 32kB regions.
vhost-5837: page allocation failure: order:4, mode:0x24040c0 Call Trace: [] dump_stack+0x97/0xdb [] warn_alloc_failed+0x10f/0x138 [] ? __alloc_pages_direct_compact+0x38/0xc8 [] __alloc_pages_nodemask+0x84c/0x90d [] alloc_kmem_pages+0x17/0x19 [] kmalloc_order_trace+0x2b/0xdb [] __kmalloc+0x177/0x1f7 [] ? copy_from_iter+0x8d/0x31d [] vhost_vsock_handle_tx_kick+0x1fa/0x301 [vhost_vsock] [] vhost_worker+0xf7/0x157 [vhost] [] kthread+0xfd/0x105 [] ? vhost_dev_set_owner+0x22e/0x22e [vhost] [] ? flush_kthread_worker+0xf3/0xf3 [] ret_from_fork+0x4e/0x80 [] ? flush_kthread_worker+0xf3/0xf3
Work around by doing kvmalloc instead.
Affected products
2- Linux/Linuxv5Range: 4.8
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
8- git.kernel.org/stable/c/0d720c3f0a03e97867deab7e480ba3d3e19837bamitre
- git.kernel.org/stable/c/0e3f72931fc47bb81686020cc643cde5d9cd0bb8mitre
- git.kernel.org/stable/c/36c9f340c60413e28f980c0224c4e9d35851526bmitre
- git.kernel.org/stable/c/7aac8c63f604e6a6a46560c0f0188cd0332cf320mitre
- git.kernel.org/stable/c/a99fc6d818161d6f1ff3307de8bf5237f6cc34d8mitre
- git.kernel.org/stable/c/b4a5905fd2ef841cd61e969ea692c213c2e5c1f7mitre
- git.kernel.org/stable/c/e28a4e7f0296824c61a81e7fd54ab48bad3e75admitre
- git.kernel.org/stable/c/e6d0152c95108651f1880c1ddfab47cb9e3e62d0mitre
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