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| author | Juergen Gross <jgross@suse.com> | 2023-02-23 09:38:00 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2023-02-23 15:52:28 +0100 |
| commit | ad32ab9604f29827494024828f527228e84fbd2c (patch) | |
| tree | 2c2b3e8cab12298572caed95571b1d067d2956a1 /kernel/irq/irq_sim.c | |
| parent | 5931e4eb55f904a4a221b57ff7d24afc0e463957 (diff) | |
irqdomain: Add missing NULL pointer check in irq_domain_create_hierarchy()
The recent switch to per-domain locking caused a NULL dereference in
irq_domain_create_hierarchy(), as Xen code is calling
msi_create_irq_domain() with a NULL parent pointer.
Fix that by testing parent to be set before dereferencing it. For a
non-existing parent the irqdomain's root will stay to point to
itself.
Fixes: 9dbb8e3452ab ("irqdomain: Switch to per-domain locking")
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20230223083800.31347-1-jgross@suse.com
Diffstat (limited to 'kernel/irq/irq_sim.c')
0 files changed, 0 insertions, 0 deletions