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qemu: do not allow /dev/rtc or /dev/hpet access via the devices cgroup

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The RTC and HPET modes for the QEMU emulation tick have been dropped
almost 9 years ago, in commit 25f3151ece1d5881826232bebccc21b588d4e03e.
Do not allow them in the devices cgroup policy.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Paolo Bonzini 2020-05-19 01:06:59 +02:00 committed by Michal Privoznik
parent c0e04c2e62
commit ab5ba57012
4 changed files with 0 additions and 5 deletions
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1
docs/drvqemu.html.in
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@ -484,7 +484,6 @@ chmod o+x /path/to/directory
/dev/null, /dev/full, /dev/zero,
/dev/random, /dev/urandom,
/dev/ptmx, /dev/kvm,
/dev/rtc, /dev/hpet
</pre>
<p>

1
src/qemu/qemu.conf
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@ -495,7 +495,6 @@
# "/dev/null", "/dev/full", "/dev/zero",
# "/dev/random", "/dev/urandom",
# "/dev/ptmx", "/dev/kvm",
# "/dev/rtc","/dev/hpet"
#]
#
# RDMA migration requires the following extra files to be added to the list:

1
src/qemu/qemu_cgroup.c
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@ -47,7 +47,6 @@ const char *const defaultDeviceACL[] = {
"/dev/null", "/dev/full", "/dev/zero",
"/dev/random", "/dev/urandom",
"/dev/ptmx", "/dev/kvm",
"/dev/rtc", "/dev/hpet",
NULL,
};
#define DEVICE_PTY_MAJOR 136

2
src/qemu/test_libvirtd_qemu.aug.in
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@ -61,8 +61,6 @@ module Test_libvirtd_qemu =
{ "5" = "/dev/urandom" }
{ "6" = "/dev/ptmx" }
{ "7" = "/dev/kvm" }
{ "8" = "/dev/rtc" }
{ "9" = "/dev/hpet" }
}
{ "save_image_format" = "raw" }
{ "dump_image_format" = "raw" }