Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: nvmet: fix freeing unallocated p2pmem In case p2p device was found but the p2p pool is empty, the nvme target is still trying to free the sgl from the p2p pool instead of the regular sgl pool and causing a crash (BUG() is called). Instead, assign the p2p_dev for the request only if it was allocated from p2p pool. This is the crash that was caused: [Sun May 30 19:13:53 2021] ------------[ cut here ]------------ [Sun May 30 19:13:53 2021] kernel BUG at lib/genalloc.c:518! [Sun May 30 19:13:53 2021] invalid opcode: 0000 [#1] SMP PTI ... [Sun May 30 19:13:53 2021] kernel BUG at lib/genalloc.c:518! ... [Sun May 30 19:13:53 2021] RIP: 0010:gen_pool_free_owner+0xa8/0xb0 ... [Sun May 30 19:13:53 2021] Call Trace: [Sun May 30 19:13:53 2021] ------------[ cut here ]------------ [Sun May 30 19:13:53 2021] pci_free_p2pmem+0x2b/0x70 [Sun May 30 19:13:53 2021] pci_p2pmem_free_sgl+0x4f/0x80 [Sun May 30 19:13:53 2021] nvmet_req_free_sgls+0x1e/0x80 [nvmet] [Sun May 30 19:13:53 2021] kernel BUG at lib/genalloc.c:518! [Sun May 30 19:13:53 2021] nvmet_rdma_release_rsp+0x4e/0x1f0 [nvmet_rdma] [Sun May 30 19:13:53 2021] nvmet_rdma_send_done+0x1c/0x60 [nvmet_rdma]
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.8, < 5.10.43 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/8a452d62e7cea3c8a2676a3b89a9118755a1a271Patch
- https://git.kernel.org/stable/c/bcd9a0797d73eeff659582f23277e7ab6e5f18f3Patch
- https://git.kernel.org/stable/c/c440cd080761b18a52cac20f2a42e5da1e3995afPatch
- https://git.kernel.org/stable/c/8a452d62e7cea3c8a2676a3b89a9118755a1a271Patch
- https://git.kernel.org/stable/c/bcd9a0797d73eeff659582f23277e7ab6e5f18f3Patch
- https://git.kernel.org/stable/c/c440cd080761b18a52cac20f2a42e5da1e3995afPatch
FAQ
What is CVE-2021-47130?
CVE-2021-47130 is a vulnerability with a CVSS score of 4.4 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: nvmet: fix freeing unallocated p2pmem In case p2p device was found but the p2p pool is empty, the nvme target is still trying to f...
How severe is CVE-2021-47130?
CVE-2021-47130 has been rated MEDIUM with a CVSS base score of 4.4/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47130?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.