Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
872d26a391da92ed8f0c0f5cb5fef428067b7f30 to < 8d01f0d0e96485e39ad89b859ef85e1dc3020465affected872d26a391da92ed8f0c0f5cb5fef428067b7f30 to < 7b6a54d4e7b0da423c2b53ed293fd36b16c0b19eaffected872d26a391da92ed8f0c0f5cb5fef428067b7f30 to < e7077e6c45423dd2bb7de7b5fc4b018a8e6c4741affected872d26a391da92ed8f0c0f5cb5fef428067b7f30 to < 86cc450022473c4a29b43a09f3ec22a9ef566dacaffected872d26a391da92ed8f0c0f5cb5fef428067b7f30 to < c509f20be1cabda3087810bb2d658d66b3f31f35affected872d26a391da92ed8f0c0f5cb5fef428067b7f30 to < 9c95f7e66c62ee6c6abedcf1c04311f430ff5833affected872d26a391da92ed8f0c0f5cb5fef428067b7f30 to < 7fd6da0f28932442b51658bac4ff55565ca9b377affected872d26a391da92ed8f0c0f5cb5fef428067b7f30 to < 9b770e40bc00381e5ebf53653de5776773415be3affected872d26a391da92ed8f0c0f5cb5fef428067b7f30 to < 737a3b535247226f6e1a7988fd9d6e63e7d6fc71affected
Linux Linux
Default version status: affected
5.0affected0 to < 5.0unaffected5.10.267 to ≤ 5.10.*unaffected5.15.218 to ≤ 5.15.*unaffected6.1.185 to ≤ 6.1.*unaffected6.6.154 to ≤ 6.6.*unaffected6.12.106 to ≤ 6.12.*unaffected6.18.47 to ≤ 6.18.*unaffected7.1.11 to ≤ 7.1.*unaffected7.2.1 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
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 ↗