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Commit 4cb19355 authored by Dan Williams's avatar Dan Williams
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device-dax: fail all private mapping attempts



The device-dax implementation originally tried to be tricky and allow
private read-only mappings, but in the process allowed writable
MAP_PRIVATE + MAP_NORESERVE mappings.  For simplicity and predictability
just fail all private mapping attempts since device-dax memory is
statically allocated and will never support overcommit.

Cc: <stable@vger.kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Fixes: dee41079 ("/dev/dax, core: file operations and dax-mmap")
Reported-by: default avatarPawel Lebioda <pawel.lebioda@intel.com>
Signed-off-by: default avatarDan Williams <dan.j.williams@intel.com>
parent 6a84fb4b
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