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| author | Konstantin Khlebnikov <khlebnikov@yandex-team.ru> | 2015-09-08 15:00:07 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2015-10-13 03:46:08 +0100 |
| commit | b1fb185f26e85f76e3ac6ce557398d78797c9684 (patch) | |
| tree | ee8ad9d43a918a2ee29e586f0fd0fe3b8583661c /arch/powerpc/sysdev/ppc4xx_msi.c | |
| parent | 9d3eb706ab42eeb9336f7b62b0d14d5f85a1dd18 (diff) | |
| download | kernel_samsung_smdk4412-b1fb185f26e85f76e3ac6ce557398d78797c9684.zip kernel_samsung_smdk4412-b1fb185f26e85f76e3ac6ce557398d78797c9684.tar.gz kernel_samsung_smdk4412-b1fb185f26e85f76e3ac6ce557398d78797c9684.tar.bz2 | |
pagemap: hide physical addresses from non-privileged users
commit 1c90308e7a77af6742a97d1021cca923b23b7f0d upstream.
This patch makes pagemap readable for normal users and hides physical
addresses from them. For some use-cases PFN isn't required at all.
See http://lkml.kernel.org/r/1425935472-17949-1-git-send-email-kirill@shutemov.name
Fixes: ab676b7d6fbf ("pagemap: do not leak physical addresses to non-privileged userspace")
Signed-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: Mark Williamson <mwilliamson@undo-software.com>
Tested-by: Mark Williamson <mwilliamson@undo-software.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[bwh: Backported to 3.2:
- Add the same check in the places where we look up a PFN
- Add struct pagemapread * parameters where necessary
- Open-code file_ns_capable()
- Delete pagemap_open() entirely, as it would always return 0]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'arch/powerpc/sysdev/ppc4xx_msi.c')
0 files changed, 0 insertions, 0 deletions