Nam Cao e7057be810 powerpc/powernv/pci: Fix underflow and leak issue ...

commit a39087905a upstream.

pnv_irq_domain_alloc() allocates interrupts at parent's interrupt
domain. If it fails in the progress, all allocated interrupts are
freed.

The number of successfully allocated interrupts so far is stored
"i". However, "i - 1" interrupts are freed. This is broken:

    - One interrupt is not be freed

    - If "i" is zero, "i - 1" wraps around

Correct the number of freed interrupts to "i".

Fixes: 0fcfe2247e ("powerpc/powernv/pci: Add MSI domains")
Signed-off-by: Nam Cao <namcao@linutronix.de>
Cc: stable@vger.kernel.org
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/70f8debe8688e0b467367db769b71c20146a836d.1754300646.git.namcao@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2025-10-19 16:33:52 +02:00

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copy-paste.h

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eeh-powernv.c

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idle.c

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Kconfig

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Makefile

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memtrace.c

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ocxl.c

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opal-async.c

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opal-call.c

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opal-core.c

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opal-dump.c

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opal-elog.c

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opal-fadump.c

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opal-fadump.h

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opal-flash.c

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opal-hmi.c

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opal-imc.c

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opal-irqchip.c

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opal-kmsg.c

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opal-lpc.c

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opal-memory-errors.c

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opal-msglog.c

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opal-nvram.c

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opal-power.c

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opal-powercap.c

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opal-prd.c

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opal-psr.c

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opal-rtc.c

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opal-secvar.c

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opal-sensor-groups.c

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opal-sensor.c

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opal-sysparam.c

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opal-tracepoints.c

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opal-wrappers.S

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opal-xscom.c

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opal.c

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pci-cxl.c

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pci-ioda-tce.c

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pci-ioda.c

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pci-sriov.c

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pci.c

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pci.h

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powernv.h

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rng.c

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setup.c

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smp.c

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subcore-asm.S

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subcore.c

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subcore.h

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ultravisor.c

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vas-debug.c

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vas-fault.c

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vas-trace.h

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vas-window.c

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vas.c

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vas.h

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