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apparmor: allow qemu to read max_segments

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Since qemu 2.9 via 9103f1ce "file-posix: Consider max_segments for
BlockLimits.max_transfer" this is a new access that is denied by the
qemu profile.

It is non fatal, but prevents the fix mentioned to actually work.
It should be safe to allow reading from that path.

Since qemu opens a symlink path we need to translate that for apparmor from
"/sys/dev/block/*/queue/max_segments" to
"/sys/devices/**/block/*/queue/max_segments"

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
This commit is contained in:
Christian Ehrhardt 2017-11-03 09:46:58 +01:00 committed by Michal Privoznik
parent 96be3e72e8
commit 37a4e6d430
1 changed files with 3 additions and 0 deletions
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3
examples/apparmor/libvirt-qemu
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@ -169,6 +169,9 @@
# for rbd
/etc/ceph/ceph.conf r,
# for file-posix getting limits since 9103f1ce
/sys/devices/**/block/*/queue/max_segments r,
# for ppc device-tree access
@{PROC}/device-tree/ r,
@{PROC}/device-tree/** r,