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Merge pull request #28803 from ijc25/check-config-legacy-vsyscall

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check-config check for LEGACY_VSYSCALL_* options
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Justin Cormack 2016-11-24 08:10:27 -08:00 committed by GitHub
commit 82c858c8b6
1 changed files with 17 additions and 0 deletions
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17
contrib/check-config.sh
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@ -222,6 +222,23 @@ echo 'Optional Features:'
echo " $(wrap_color '(note that cgroup swap accounting is not enabled in your kernel config, you can enable it by setting boot option "swapaccount=1")' bold black)" echo " $(wrap_color '(note that cgroup swap accounting is not enabled in your kernel config, you can enable it by setting boot option "swapaccount=1")' bold black)"
fi fi
} }
{
if is_set LEGACY_VSYSCALL_NATIVE; then
echo -n "- "; wrap_good "CONFIG_LEGACY_VSYSCALL_NATIVE" 'enabled'
elif is_set LEGACY_VSYSCALL_EMULATE; then
echo -n "- "; wrap_good "CONFIG_LEGACY_VSYSCALL_EMULATE" 'enabled'
elif is_set LEGACY_VSYSCALL_NONE; then
echo -n "- "; wrap_bad "CONFIG_LEGACY_VSYSCALL_NONE" 'enabled'
echo " $(wrap_color '(containers using eglibc <= 2.13 will not work. Switch to' bold black)"
echo " $(wrap_color ' "CONFIG_VSYSCALL_[NATIVE|EMULATE]" or use "vsyscall=[native|emulate]"' bold black)"
echo " $(wrap_color ' on kernel command line. Note that this will disable ASLR for the,' bold black)"
echo " $(wrap_color ' VDSO which may assist in exploiting security vulnerabilities.)' bold black)"
# else Older kernels (prior to 3dc33bd30f3e, released in v4.40-rc1) do
# not have these LEGACY_VSYSCALL options and are effectively
# LEGACY_VSYSCALL_EMULATE. Even older kernels are presumably
# effectively LEGACY_VSYSCALL_NATIVE.
fi
}
if [ "$kernelMajor" -lt 4 ] || [ "$kernelMajor" -eq 4 -a "$kernelMinor" -le 5 ]; then if [ "$kernelMajor" -lt 4 ] || [ "$kernelMajor" -eq 4 -a "$kernelMinor" -le 5 ]; then
check_flags MEMCG_KMEM check_flags MEMCG_KMEM