In the Linux kernel, the following vulnerability has been resolved:

sfc: fix kernel panic when creating VF

When creating VFs a kernel panic can happen when calling to
efx_ef10_try_update_nic_stats_vf.

When releasing a DMA coherent buffer, sometimes, I don't know in what
specific circumstances, it has to unmap memory with vunmap. It is
disallowed to do that in IRQ context or with BH disabled. Otherwise, we
hit this line in vunmap, causing the crash:
  BUG_ON(in_interrupt());

This patch reenables BH to release the buffer.

Log messages when the bug is hit:
 kernel BUG at mm/vmalloc.c:2727!
 invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
 CPU: 6 PID: 1462 Comm: NetworkManager Kdump: loaded Tainted: G          I      --------- ---  5.14.0-119.el9.x86_64 #1
 Hardware name: Dell Inc. PowerEdge R740/06WXJT, BIOS 2.8.2 08/27/2020
 RIP: 0010:vunmap+0x2e/0x30
 ...skip...
 Call Trace:
  __iommu_dma_free+0x96/0x100
  efx_nic_free_buffer+0x2b/0x40 [sfc]
  efx_ef10_try_update_nic_stats_vf+0x14a/0x1c0 [sfc]
  efx_ef10_update_stats_vf+0x18/0x40 [sfc]
  efx_start_all+0x15e/0x1d0 [sfc]
  efx_net_open+0x5a/0xe0 [sfc]
  __dev_open+0xe7/0x1a0
  __dev_change_flags+0x1d7/0x240
  dev_change_flags+0x21/0x60
  ...skip...

https://git.kernel.org/stable/c/16662524ec5da801fb78a1afcaf6e782f1cf103a

https://git.kernel.org/stable/c/68e5f32f0de9594629ff9e599294d9801c6187de

https://git.kernel.org/stable/c/82bcb730f856086f033e6c04082eb4503d4c2fa4

https://git.kernel.org/stable/c/ada74c5539eba06cf8b47d068f92e0b3963a9a6e

https://git.kernel.org/stable/c/b82e4ad58a7fb72456503958a93060f87896e629

https://git.kernel.org/stable/c/b9072305270579a9d6afc9b926166231e5b1a7c8

https://git.kernel.org/stable/c/d9840212a9c00507347c703f4fdeda16400407e0

https://git.kernel.org/stable/c/da346adcf5573fd8663cabfdfe8371009629a906