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authorDavid Gibson <david@gibson.dropbear.id.au>2006-11-14 05:03:38 -0500
committerLinus Torvalds <torvalds@woody.osdl.org>2006-11-14 12:09:27 -0500
commitcb07c9a1864a8eac9f3123e428100d5b2a16e65a (patch)
treefadc568154bbe3c1466081b718e9638438c82c46 /mm/allocpercpu.c
parent68589bc353037f233fe510ad9ff432338c95db66 (diff)
[PATCH] hugetlb: check for brk() entering a hugepage region
Unlike mmap(), the codepath for brk() creates a vma without first checking that it doesn't touch a region exclusively reserved for hugepages. On powerpc, this can allow it to create a normal page vma in a hugepage region, causing oopses and other badness. Add a test to prevent this. With this patch, brk() will simply fail if it attempts to move the break into a hugepage reserved region. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Cc: Adam Litke <agl@us.ibm.com> Cc: Hugh Dickins <hugh@veritas.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm/allocpercpu.c')
0 files changed, 0 insertions, 0 deletions