Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: Do not WARN on remotely-controlled oversized SGL allocations When fuzzing the nvme target code, I tripped a kernel warning in nvmet_tcp_map_data() because the length passed into the allocator is controlled by the remote initiator. A remote initiator that sends a command with an SGL claiming a huge number, can create a scatterlist and iovec allocation of over 1 million entries, which causes the backing kmalloc call to exceed MAX_PAGE_ORDER and then the page allocator will trip on a WARN_ON_ONCE_GFP() message: WARNING: mm/page_alloc.c:5280 __alloc_frozen_pages_noprof Workqueue: nvmet_tcp_wq nvmet_tcp_io_work ... sgl_alloc_order nvmet_tcp_map_data nvmet_tcp_try_recv_pdu As it's never good to trip a kernel warning remotely due to many systems having panic-on-warn enabled, let's silence it by just add GFP_NOWARN to the allocation flags.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before 8d01f0d0e96485e39ad89b859ef85e1dc3020465; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before 7b6a54d4e7b0da423c2b53ed293fd36b16c0b19e; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before e7077e6c45423dd2bb7de7b5fc4b018a8e6c4741; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before 86cc450022473c4a29b43a09f3ec22a9ef566dac; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before c509f20be1cabda3087810bb2d658d66b3f31f35; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before 9c95f7e66c62ee6c6abedcf1c04311f430ff5833; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before 7fd6da0f28932442b51658bac4ff55565ca9b377; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before 9b770e40bc00381e5ebf53653de5776773415be3; affected 872d26a391da92ed8f0c0f5cb5fef428067b7f30 before 737a3b535247226f6e1a7988fd9d6e63e7d6fc71 |
| Linux / Linux | affected 5.0; unaffected 0 before 5.0; unaffected 5.10.267 through 5.10.*; unaffected 5.15.218 through 5.15.*; unaffected 6.1.185 through 6.1.*; unaffected 6.6.154 through 6.6.*; unaffected 6.12.106 through 6.12.*; unaffected 6.18.47 through 6.18.*; unaffected 7.1.11 through 7.1.*; unaffected 7.2.1 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/8d01f0d0e96485e39ad89b859ef85e1dc3020465
- https://git.kernel.org/stable/c/7b6a54d4e7b0da423c2b53ed293fd36b16c0b19e
- https://git.kernel.org/stable/c/e7077e6c45423dd2bb7de7b5fc4b018a8e6c4741
- https://git.kernel.org/stable/c/86cc450022473c4a29b43a09f3ec22a9ef566dac
- https://git.kernel.org/stable/c/c509f20be1cabda3087810bb2d658d66b3f31f35
- https://git.kernel.org/stable/c/9c95f7e66c62ee6c6abedcf1c04311f430ff5833
- https://git.kernel.org/stable/c/7fd6da0f28932442b51658bac4ff55565ca9b377
- https://git.kernel.org/stable/c/9b770e40bc00381e5ebf53653de5776773415be3
- https://git.kernel.org/stable/c/737a3b535247226f6e1a7988fd9d6e63e7d6fc71