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authorAlex Zhang2020-08-06 23:22:24 -0700
committerLinus Torvalds2020-08-07 11:33:26 -0700
commit0c4123e3fb82d6014d0a70b52eb38153f658541c (patch)
tree5c656de44bab39604512c9438a665f657b09aec6 /arch/powerpc/mm/nohash/40x.c
parent463b7a173d52f0b15473171fe895ab3a3d852a5e (diff)
mm/memory.c: make remap_pfn_range() reject unaligned addr
This function implicitly assumes that the addr passed in is page aligned. A non page aligned addr could ultimately cause a kernel bug in remap_pte_range as the exit condition in the logic loop may never be satisfied. This patch documents the need for the requirement, as well as explicitly adds a check for it. Signed-off-by: Alex Zhang <zhangalex@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Link: http://lkml.kernel.org/r/20200617233512.177519-1-zhangalex@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/powerpc/mm/nohash/40x.c')
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