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

bnxt_en: Fix NULL pointer dereference

PCIe errors detected by a Root Port or Downstream Port cause error
recovery services to run on all subordinate devices regardless of
administrative state.

The .error_detected() callback, bnxt_io_error_detected(), disables
and synchronizes IRQs via bnxt_disable_int_sync(), which calls
bnxt_cp_num_to_irq_num() to map completion rings to IRQs using
bp->bnapi.

Since bp->bnapi is allocated on NIC open and freed on NIC close, PCIe
error recovery on a closed NIC can dereference a NULL pointer.

Check if bp->bnapi is NULL before disabling and synchronizing IRQs.

https://git.kernel.org/stable/c/08e57d014ea19f303d5d57a849beb846f37788b7

https://git.kernel.org/stable/c/1a418ad0e5e525d1d117dd1601681f75455af320

https://git.kernel.org/stable/c/3884976f87448e269908ae61bd5d62d54ce9c0c7

https://git.kernel.org/stable/c/580844a9683afe7974856dd5b7886447435b3474

https://git.kernel.org/stable/c/59c5a3e69c7630a811565937e64be70b08436761

https://git.kernel.org/stable/c/964b1c3eb71afe58bb61c8b984164447e000ae8a

https://git.kernel.org/stable/c/d930276f2cddd0b7294cac7a8fe7b877f6d9e08d

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