path: root/tools
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authorAndrea Arcangeli <aarcange@redhat.com>2015-09-04 15:47:20 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-09-04 16:54:41 -0700
commit230c92a8797e0e717c6732de0fffdd5726c0f48f (patch)
treed492aa522ed4c65c77401cd0c91fa759fadb219c /tools
parentdfa37dc3fc1f6f81a6900d0e561c02362f4817f6 (diff)
userfaultfd: propagate the full address in THP faults
The THP faults were not propagating the original fault address. The latest version of the API with uffd.arg.pagefault.address is supposed to propagate the full address through THP faults. This was not a kernel crashing bug and it wouldn't risk to corrupt user memory, but it would cause a SIGBUS failure because the wrong page was being copied. For various reasons this wasn't easily reproducible in the qemu workload, but the strestest exposed the problem immediately. Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Pavel Emelyanov <xemul@parallels.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools')
0 files changed, 0 insertions, 0 deletions

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