This is a note to let you know that I've just added the patch titled acpi, nfit, libnvdimm: fix interleave set cookie calculation (64-bit comparison) to the 4.9-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: acpi-nfit-libnvdimm-fix-interleave-set-cookie-calculation-64-bit-comparison.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From b03b99a329a14b7302f37c3ea6da3848db41c8c5 Mon Sep 17 00:00:00 2001 From: Dan Williams <dan.j.williams@xxxxxxxxx> Date: Mon, 27 Mar 2017 21:53:38 -0700 Subject: acpi, nfit, libnvdimm: fix interleave set cookie calculation (64-bit comparison) From: Dan Williams <dan.j.williams@xxxxxxxxx> commit b03b99a329a14b7302f37c3ea6da3848db41c8c5 upstream. While reviewing the -stable patch for commit 86ef58a4e35e "nfit, libnvdimm: fix interleave set cookie calculation" Ben noted: "This is returning an int, thus it's effectively doing a 32-bit comparison and not the 64-bit comparison you say is needed." Update the compare operation to be immune to this integer demotion problem. Cc: Nicholas Moulin <nicholas.w.moulin@xxxxxxxxxxxxxxx> Fixes: 86ef58a4e35e ("nfit, libnvdimm: fix interleave set cookie calculation") Reported-by: Ben Hutchings <ben@xxxxxxxxxxxxxxx> Signed-off-by: Dan Williams <dan.j.williams@xxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/acpi/nfit/core.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -1617,7 +1617,11 @@ static int cmp_map(const void *m0, const const struct nfit_set_info_map *map0 = m0; const struct nfit_set_info_map *map1 = m1; - return map0->region_offset - map1->region_offset; + if (map0->region_offset < map1->region_offset) + return -1; + else if (map0->region_offset > map1->region_offset) + return 1; + return 0; } /* Retrieve the nth entry referencing this spa */ Patches currently in stable-queue which might be from dan.j.williams@xxxxxxxxx are queue-4.9/acpi-nfit-libnvdimm-fix-interleave-set-cookie-calculation-64-bit-comparison.patch queue-4.9/libnvdimm-fix-blk-free-space-accounting.patch queue-4.9/x86-pmem-fix-broken-__copy_user_nocache-cache-bypass-assumptions.patch queue-4.9/libnvdimm-fix-reconfig_mutex-mmap_sem-and-jbd2_handle-lockdep-splat.patch