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linux/arch/x86/purgatory
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Arvind Sankar ff58155ca4 x86/purgatory: Add -fno-stack-protector 
The purgatory Makefile removes -fstack-protector options if they were
configured in, but does not currently add -fno-stack-protector.

If gcc was configured with the --enable-default-ssp configure option,
this results in the stack protector still being enabled for the
purgatory (absent distro-specific specs files that might disable it
again for freestanding compilations), if the main kernel is being
compiled with stack protection enabled (if it's disabled for the main
kernel, the top-level Makefile will add -fno-stack-protector).

This will break the build since commit
  e4160b2e4b ("x86/purgatory: Fail the build if purgatory.ro has missing symbols")
and prior to that would have caused runtime failure when trying to use
kexec.

Explicitly add -fno-stack-protector to avoid this, as done in other
Makefiles that need to disable the stack protector.

Reported-by: Gabriel C <nix.or.die@googlemail.com>
Signed-off-by: Arvind Sankar <nivedita@alum.mit.edu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 		2020-06-16 17:05:07 -07:00
..
.gitignore x86/purgatory: Fail the build if purgatory.ro has missing symbols 2020-03-17 15:59:12 +01:00
Makefile x86/purgatory: Add -fno-stack-protector 2020-06-16 17:05:07 -07:00
entry64.S x86/asm/purgatory: Start using annotations 2019-10-18 10:48:43 +02:00
purgatory.c x86/kdump: Remove the backup region handling 2019-11-14 18:24:43 +01:00
setup-x86_64.S x86/asm/purgatory: Start using annotations 2019-10-18 10:48:43 +02:00
stack.S x86/asm/purgatory: Start using annotations 2019-10-18 10:48:43 +02:00