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Dan Williams fce86ff580 mm/huge_memory: fix vmf_insert_pfn_{pmd, pud}() crash, handle unaligned addresses 
Starting with c6f3c5ee40 ("mm/huge_memory.c: fix modifying of page
protection by insert_pfn_pmd()") vmf_insert_pfn_pmd() internally calls
pmdp_set_access_flags().  That helper enforces a pmd aligned @address
argument via VM_BUG_ON() assertion.

Update the implementation to take a 'struct vm_fault' argument directly
and apply the address alignment fixup internally to fix crash signatures
like:

    kernel BUG at arch/x86/mm/pgtable.c:515!
    invalid opcode: 0000 [#1] SMP NOPTI
    CPU: 51 PID: 43713 Comm: java Tainted: G           OE     4.19.35 #1
    [..]
    RIP: 0010:pmdp_set_access_flags+0x48/0x50
    [..]
    Call Trace:
     vmf_insert_pfn_pmd+0x198/0x350
     dax_iomap_fault+0xe82/0x1190
     ext4_dax_huge_fault+0x103/0x1f0
     ? __switch_to_asm+0x40/0x70
     __handle_mm_fault+0x3f6/0x1370
     ? __switch_to_asm+0x34/0x70
     ? __switch_to_asm+0x40/0x70
     handle_mm_fault+0xda/0x200
     __do_page_fault+0x249/0x4f0
     do_page_fault+0x32/0x110
     ? page_fault+0x8/0x30
     page_fault+0x1e/0x30

Link: http://lkml.kernel.org/r/155741946350.372037.11148198430068238140.stgit@dwillia2-desk3.amr.corp.intel.com
Fixes: c6f3c5ee40 ("mm/huge_memory.c: fix modifying of page protection by insert_pfn_pmd()")
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Reported-by: Piotr Balcer <piotr.balcer@intel.com>
Tested-by: Yan Ma <yan.ma@intel.com>
Tested-by: Pankaj Gupta <pagupta@redhat.com>
Reviewed-by: Matthew Wilcox <willy@infradead.org>
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Chandan Rajendra <chandan@linux.ibm.com>
Cc: Souptick Joarder <jrdr.linux@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2019-05-14 09:47:44 -07:00
..
acpi Driver core/kobject patches for 5.2-rc1 2019-05-07 13:01:40 -07:00
asm-generic Kbuild updates for v5.2 2019-05-08 12:25:12 -07:00
clocksource
…
crypto crypto: shash - remove shash_desc::flags 2019-04-25 15:38:12 +08:00
drm drm pull request for 5.2 2019-05-08 21:35:19 -07:00
dt-bindings We have a couple new features and changes in the core clk framework this time 2019-05-09 14:50:09 -07:00
keys KEYS: trusted: fix -Wvarags warning 2019-04-08 15:58:54 -07:00
kvm ARM: some cleanups, direct physical timer assignment, cache sanitization 2019-03-15 15:00:28 -07:00
linux mm/huge_memory: fix vmf_insert_pfn_{pmd, pud}() crash, handle unaligned addresses 2019-05-14 09:47:44 -07:00
math-emu
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media drm pull request for 5.2 2019-05-08 21:35:19 -07:00
memory
…
misc ocxl: Provide global MMIO accessors for external drivers 2019-05-03 02:55:02 +10:00
net net/tcp: use deferred jump label for TCP acked data hook 2019-05-09 11:13:57 -07:00
pcmcia
…
ras
…
rdma RDMA: Add EFA related definitions 2019-05-06 13:47:50 -03:00
scsi scsi: libsas: Inject revalidate event for root port event 2019-04-15 18:55:00 -04:00
soc This pull request contains the following changes for MTD: 2019-05-12 17:57:52 -04:00
sound sound updates for 5.2-rc1 2019-05-09 08:26:55 -07:00
target scsi: target/iscsi: Handle too large immediate data buffers correctly 2019-04-12 20:20:06 -04:00
trace This is the bulk of the GPIO changes for the v5.2 kernel cycle: 2019-05-11 10:54:43 -04:00
uapi NFS client updates for Linux 5.2 2019-05-09 14:33:15 -07:00
video udlfb: introduce a rendering mutex 2019-04-01 17:46:57 +02:00
xen block: pass page to xen_biovec_phys_mergeable 2019-04-01 12:11:13 -06:00