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author | 2018-01-25 15:50:28 -0800 | |
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committer | 2018-01-26 15:03:56 +0100 | |
commit | caf7501a1b4ec964190f31f9c3f163de252273b8 (patch) | |
tree | f626e796eb8f30eca268595ca07dc90e00b06ec3 /tools/perf/scripts/python/export-to-postgresql.py | |
parent | KVM: VMX: Make indirect call speculation safe (diff) | |
download | linux-dev-caf7501a1b4ec964190f31f9c3f163de252273b8.tar.xz linux-dev-caf7501a1b4ec964190f31f9c3f163de252273b8.zip |
module/retpoline: Warn about missing retpoline in module
There's a risk that a kernel which has full retpoline mitigations becomes
vulnerable when a module gets loaded that hasn't been compiled with the
right compiler or the right option.
To enable detection of that mismatch at module load time, add a module info
string "retpoline" at build time when the module was compiled with
retpoline support. This only covers compiled C source, but assembler source
or prebuilt object files are not checked.
If a retpoline enabled kernel detects a non retpoline protected module at
load time, print a warning and report it in the sysfs vulnerability file.
[ tglx: Massaged changelog ]
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: gregkh@linuxfoundation.org
Cc: torvalds@linux-foundation.org
Cc: jeyu@kernel.org
Cc: arjan@linux.intel.com
Link: https://lkml.kernel.org/r/20180125235028.31211-1-andi@firstfloor.org
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
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