Andi Kleen a1745ad92f module/retpoline: Warn about missing retpoline in module ... (cherry picked from commit caf7501a1b) 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 Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-02-13 12:35:58 +01:00
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.gitignore	kbuild: trivial - remove trailing empty lines	2014-06-10 00:04:06 +02:00
Makefile	objtool: Mark non-standard object files and directories	2016-02-29 08:35:02 +01:00
devicetable-offsets.c	staging: fsl-mc: add support for device table matching	2016-06-26 17:14:03 -07:00
empty.c	Linux-2.6.12-rc2	2005-04-16 15:20:36 -07:00
file2alias.c	staging: fsl-mc: add support for device table matching	2016-06-26 17:14:03 -07:00
mk_elfconfig.c	kbuild: trivial - remove trailing empty lines	2014-06-10 00:04:06 +02:00
modpost.c	module/retpoline: Warn about missing retpoline in module	2018-02-13 12:35:58 +01:00
modpost.h	Avoid conflict with host definitions when cross-compiling	2015-08-20 14:55:54 +02:00
sumversion.c	kbuild: trivial - use tabs for code indent where possible	2014-06-10 14:00:53 +02:00