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b7ab86bdc6
On a machine without PCI memory-I/O (MIO) support or when running with
pci=nomio the s390 specific PCI MMIO write syscall checks if the MMIO
cookie is above ZPCI_IOMAP_ADDR_BASE as a sanity check before even
trying to perform the MMIO. If this check fails the return value was
left unchanged and thus 0 from prior operations falsely indicating
success. This could potentially confuse user-space into falsely
believing the MMIO, on a mapping not valid for MMIO was successful.
Fix this by setting the return value to -EFAULT prior to the check
following the same pattern as elsewhere in the same function.
Cc: stable@vger.kernel.org
Reviewed-by: Julian Ruess <julianr@linux.ibm.com>
Reviewed-by: Farhan Ali <alifm@linux.ibm.com>
Fixes:
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History
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|---|---|---|
| .. | ||
| Makefile | ||
| pci.c | ||
| pci_bus.c | ||
| pci_bus.h | ||
| pci_clp.c | ||
| pci_debug.c | ||
| pci_event.c | ||
| pci_fixup.c | ||
| pci_insn.c | ||
| pci_iov.c | ||
| pci_iov.h | ||
| pci_irq.c | ||
| pci_kvm_hook.c | ||
| pci_mmio.c | ||
| pci_report.c | ||
| pci_report.h | ||
| pci_sysfs.c | ||