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Gustavo A. R. Silva 61cb9ac66b powerpc/vas: Fix potential NULL pointer dereference 
(!ptr && !ptr->foo) strikes again. :)

The expression (!ptr && !ptr->foo) is bogus and in case ptr is NULL,
it leads to a NULL pointer dereference: ptr->foo.

Fix this by converting && to ||

This issue was detected with the help of Coccinelle, and audited and
fixed manually.

Fixes: 1a0d0d5ed5 ("powerpc/vas: Add platform specific user window operations")
Cc: stable@vger.kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Tyrel Datwyler <tyreld@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20211015050345.GA1161918@embeddedor
2021-10-22 15:22:04 +11:00
..
4xx powerpc: Add esr as a synonym for pt_regs.dsisr 2021-08-26 21:21:06 +10:00
8xx powerpc: bad_page_fault get registers from regs 2021-02-09 00:02:09 +11:00
40x powerpc: Remove IBM405 Erratum #77 2020-05-28 23:24:36 +10:00
44x powerpc/476: Fix sparse report 2021-10-09 00:15:58 +11:00
52xx powerpc: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:41 +01:00
82xx powerpc: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:41 +01:00
83xx powerpc/83xx: Fix build error when CONFIG_PCI=n 2021-02-11 23:28:51 +11:00
85xx powerpc/85xx: fix timebase sync issue when CONFIG_HOTPLUG_CPU=n 2021-10-09 00:15:58 +11:00
86xx powerpc: retire sbc8641d board support 2021-08-27 00:48:18 +10:00
512x powerpc: Bulk conversion to generic_handle_domain_irq() 2021-08-12 11:39:41 +01:00
amigaone powerpc/amigaone: Make amigaone_discover_phbs() static 2021-02-11 23:28:51 +11:00
book3s powerpc/vas: Fix potential NULL pointer dereference 2021-10-22 15:22:04 +11:00
cell powerpc: rename powerpc_debugfs_root to arch_debugfs_dir 2021-08-13 22:04:26 +10:00
chrp powerpc/chrp: Make hydra_init() static 2021-03-24 14:09:29 +11:00
embedded6xx powerpc: Refactor verification of MSR_RI 2021-08-26 21:21:07 +10:00
maple powerpc/pci: fix warning comparing pointer to 0 2021-03-29 13:22:13 +11:00
microwatt powerpc/microwatt: Add support for hardware random number generator 2021-06-21 21:16:32 +10:00
pasemi powerpc updates for 5.15 2021-09-03 11:22:50 -07:00
powermac powerpc/powermac: Remove stale declaration of pmac_md 2021-10-09 00:15:58 +11:00
powernv powerpc/powernv/dump: Fix typo in comment 2021-10-09 00:15:59 +11:00
ps3 powerpc updates for 5.15 2021-09-03 11:22:50 -07:00
pseries powerpc/pseries/iommu: Add of_node_put() before break 2021-10-22 15:22:02 +11:00
fsl_uli1575.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
Kconfig powerpc/64s: Make prom_init require RELOCATABLE 2021-06-25 14:47:19 +10:00
Kconfig.cputype powerpc: Re-enable ARCH_ENABLE_SPLIT_PMD_PTLOCK 2021-08-20 12:38:50 +10:00
Makefile powerpc: Add Microwatt platform 2021-06-21 21:15:26 +10:00