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Michael Ellerman f8240a4feb powerpc/mpic: Check if cpu_possible() in mpic_physmask() 
[ Upstream commit 0834d627fb ]

In mpic_physmask() we loop over all CPUs up to 32, then get the hard
SMP processor id of that CPU.

Currently that's possibly walking off the end of the paca array, but
in a future patch we will change the paca array to be an array of
pointers, and in that case we will get a NULL for missing CPUs and
oops. eg:

  Unable to handle kernel paging request for data at address 0x88888888888888b8
  Faulting instruction address: 0xc00000000004e380
  Oops: Kernel access of bad area, sig: 11 [#1]
  ...
  NIP .mpic_set_affinity+0x60/0x1a0
  LR  .irq_do_set_affinity+0x48/0x100

Fix it by checking the CPU is possible, this also fixes the code if
there are gaps in the CPU numbering which probably never happens on
mpic systems but who knows.

Debugged-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-05-30 07:49:09 +02:00
..
ge genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
qe_lib irqdomain: Use irq_domain_get_of_node() instead of direct field access 2015-10-13 19:01:23 +02:00
xics powerpc, irq: Use access helper irq_data_get_affinity_mask() 2015-09-15 17:06:28 +02:00
6xx-suspend.S
axonram.c axonram: Fix gendisk handling 2017-12-16 10:33:53 +01:00
cpm1.c
cpm2.c
cpm2_pic.c powerpc/cpm2: Use irq_set_handler_locked() 2015-09-16 15:43:10 +02:00
cpm2_pic.h
cpm_common.c powerpc: handle error case in cpm_muram_alloc() 2015-10-27 18:13:31 -05:00
dart.h
dart_iommu.c powerpc/iommu: Cleanup setting of DMA base/offset 2015-07-13 10:10:55 +10:00
dcr-low.S
dcr.c powerpc: Use bool function return values of true/false not 1/0 2015-03-31 14:19:47 +11:00
ehv_pic.c irqdomain: Use irq_domain_get_of_node() instead of direct field access 2015-10-13 19:01:23 +02:00
fsl_85xx_cache_ctlr.h
fsl_85xx_cache_sram.c
fsl_85xx_l2ctlr.c powerpc: sysdev: drop owner assignment from platform_drivers 2014-10-20 16:20:13 +02:00
fsl_gtm.c
fsl_lbc.c powerpc: use subsys_initcall for Freescale Local Bus 2015-06-16 14:12:34 -04:00
fsl_mpic_err.c
fsl_mpic_timer_wakeup.c
fsl_msi.c irqdomain: Use irq_domain_get_of_node() instead of direct field access 2015-10-13 19:01:23 +02:00
fsl_msi.h powerpc/85xx: workaround for chips with MSI hardware errata 2015-03-23 19:51:18 -05:00
fsl_pci.c powerpc updates for 4.4 2015-11-05 23:38:43 -08:00
fsl_pci.h
fsl_pmc.c powerpc: sysdev: drop owner assignment from platform_drivers 2014-10-20 16:20:13 +02:00
fsl_rio.c Driver core patches for 3.19-rc1 2014-12-14 16:10:09 -08:00
fsl_rio.h powerpc/fsl-rio: add support for mapping inbound windows 2014-11-12 23:56:16 -06:00
fsl_rmu.c
fsl_soc.c powerpc/fsl: fsl_soc: delete unneeded test before of_node_put 2014-11-10 09:59:34 +11:00
fsl_soc.h
grackle.c
i8259.c irqdomain: Use irq_domain_get_of_node() instead of direct field access 2015-10-13 19:01:23 +02:00
indirect_pci.c powerpc/fsl_pci: Fix pci stack build bug with FRAME_WARN 2015-01-29 19:56:15 -06:00
ipic.c powerpc/ipic: Fix status get and status clear 2017-12-20 10:04:58 +01:00
ipic.h
Kconfig
Makefile powerpc/pasemi: Only the build the pasemi MSI code for PASEMI=y 2015-05-11 19:55:25 +10:00
micropatch.c
mmio_nvram.c
mpc5xxx_clocks.c powerpc/mpc5xxx: Use of_get_next_parent to simplify code 2015-10-15 20:32:01 +11:00
mpc8xx_pic.c powerpc/8xx: Shorten irq_chip name for the SIU 2015-10-06 21:54:42 +11:00
mpc8xx_pic.h
mpic.c powerpc/mpic: Check if cpu_possible() in mpic_physmask() 2018-05-30 07:49:09 +02:00
mpic.h powerpc/pasemi: Only the build the pasemi MSI code for PASEMI=y 2015-05-11 19:55:25 +10:00
mpic_msgr.c powerpc: sysdev: drop owner assignment from platform_drivers 2014-10-20 16:20:13 +02:00
mpic_msi.c irqdomain: Use irq_domain_get_of_node() instead of direct field access 2015-10-13 19:01:23 +02:00
mpic_timer.c
mpic_u3msi.c powerpc/MSI: Fix race condition in tearing down MSI interrupts 2015-09-10 17:27:08 +10:00
msi_bitmap.c powerpc/msi: Fix section mismatch warning in msi_bitmap_alloc() 2015-10-28 12:08:33 +09:00
mv64x60.h
mv64x60_dev.c
mv64x60_pci.c
mv64x60_pic.c powerpc: Constify irq_domain_ops 2015-05-11 16:58:20 +10:00
mv64x60_udbg.c
of_rtc.c
pmi.c powerpc: sysdev: drop owner assignment from platform_drivers 2014-10-20 16:20:13 +02:00
ppc4xx_cpm.c powerpc/4xx/cpm: delete unneeded test before of_node_put 2014-11-10 09:59:34 +11:00
ppc4xx_gpio.c
ppc4xx_hsta_msi.c powerpc updates for 4.3 2015-09-03 16:41:38 -07:00
ppc4xx_msi.c powerpc/MSI: Fix race condition in tearing down MSI interrupts 2015-09-10 17:27:08 +10:00
ppc4xx_ocm.c
ppc4xx_pci.c powerpc: Remove superfluous bootmem includes 2014-11-10 09:59:26 +11:00
ppc4xx_pci.h
ppc4xx_soc.c
rtc_cmos_setup.c
scom.c
simple_gpio.c
simple_gpio.h
tsi108_dev.c
tsi108_pci.c genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
udbg_memcons.c
uic.c genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
xilinx_intc.c genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
xilinx_pci.c