6acd7d5ef2
The pmem driver on PowerPC crashes with the following signature when
instantiating misaligned namespaces that map their capacity via
memremap_pages().
BUG: Unable to handle kernel data access at 0xc001000406000000
Faulting instruction address: 0xc000000000090790
NIP [c000000000090790] arch_add_memory+0xc0/0x130
LR [c000000000090744] arch_add_memory+0x74/0x130
Call Trace:
arch_add_memory+0x74/0x130 (unreliable)
memremap_pages+0x74c/0xa30
devm_memremap_pages+0x3c/0xa0
pmem_attach_disk+0x188/0x770
nvdimm_bus_probe+0xd8/0x470
With the assumption that only memremap_pages() has alignment
constraints, enforce memremap_compat_align() for
pmem_should_map_pages(), nd_pfn, and nd_dax cases. This includes
preventing the creation of namespaces where the base address is
misaligned and cases there infoblock padding parameters are invalid.
Reported-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Jeff Moyer <jmoyer@redhat.com>
Fixes:
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| accessibility | ||
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| amba | ||
| android | ||
| ata | ||
| atm | ||
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| char | ||
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| cpuidle | ||
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| ide | ||
| idle | ||
| iio | ||
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| input | ||
| interconnect | ||
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| ipack | ||
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| isdn | ||
| leds | ||
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| macintosh | ||
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| memstick | ||
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| misc | ||
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| net | ||
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| perf | ||
| phy | ||
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| platform | ||
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| power | ||
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| ps3 | ||
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| Kconfig | ||
| Makefile | ||