From: Arvind Sankar <[email protected]>
[ Upstream commit ca14c996afe7228ff9b480cf225211cc17212688 ]
Since commit:
b059f801a937 ("x86/purgatory: Use CFLAGS_REMOVE rather than reset
KBUILD_CFLAGS")
kexec breaks if GCC_PLUGIN_STACKLEAK=y is enabled, as the purgatory
contains undefined references to stackleak_track_stack.
Attempting to load a kexec kernel results in this failure:
kexec: Undefined symbol: stackleak_track_stack
kexec-bzImage64: Loading purgatory failed
Fix this by disabling the stackleak plugin for the purgatory.
Signed-off-by: Arvind Sankar <[email protected]>
Reviewed-by: Nick Desaulniers <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Fixes: b059f801a937 ("x86/purgatory: Use CFLAGS_REMOVE rather than reset
KBUILD_CFLAGS")
Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Ingo Molnar <[email protected]>
Signed-off-by: Sasha Levin <[email protected]>
---
arch/x86/purgatory/Makefile | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile
index 10fb42da0007e..b81b5172cf994 100644
--- a/arch/x86/purgatory/Makefile
+++ b/arch/x86/purgatory/Makefile
@@ -23,6 +23,7 @@ KCOV_INSTRUMENT := n
PURGATORY_CFLAGS_REMOVE := -mcmodel=kernel
PURGATORY_CFLAGS := -mcmodel=large -ffreestanding -fno-zero-initialized-in-bss
+PURGATORY_CFLAGS += $(DISABLE_STACKLEAK_PLUGIN)
# Default KBUILD_CFLAGS can have -pg option set when FTRACE is enabled. That
# in turn leaves some undefined symbols like __fentry__ in purgatory and not
--
2.20.1
