On 01.05.23 22:30, Stewart Hildebrand wrote:
When creating a domU, but the creation fails, there is a corner case that may lead to a crash in the null scheduler when running a debug build of Xen.(XEN) **************************************** (XEN) Panic on CPU 0: (XEN) Assertion 'npc->unit == unit' failed at common/sched/null.c:379 (XEN) **************************************** The events leading to the crash are: * null_unit_insert() was invoked with the unit offline. Since the unit was offline, unit_assign() was not called, and null_unit_insert() returned. * Later during domain creation, the unit was onlined * Eventually, domain creation failed due to bad configuration * null_unit_remove() was invoked with the unit still online. Since the unit was online, it called unit_deassign() and triggered an ASSERT. To fix this, only call unit_deassign() when npc->unit is non-NULL in null_unit_remove. Signed-off-by: Stewart Hildebrand <stewart.hildebr...@amd.com>
Reviewed-by: Juergen Gross <jgr...@suse.com> Juergen
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