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Change History

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

iommu/vt-d: Fix NULL domain on device release

In the kdump kernel, the IOMMU operates in deferred_attach mode. In this
mode, info->domain may not yet be assigned by the time the release_device
function is called. It leads to the following crash in the crash kernel:

    BUG: kernel NULL pointer dereference, address: 000000000000003c
    ...
    RIP: 0010:do_raw_spin_lock+0xa/0xa0
    ...
    _raw_spin_lock_irqsave+0x1b/0x30
  

kernel.org https://git.kernel.org/stable/c/333fe86968482ca701c609af590003bcea450e8f [No types assigned]

kernel.org https://git.kernel.org/stable/c/81e921fd321614c2ad8ac333b041aae1da7a1c6d [No types assigned]