diff options
| author | Arvind Sankar <[email protected]> | 2019-09-23 13:17:54 -0400 |
|---|---|---|
| committer | Ingo Molnar <[email protected]> | 2019-09-23 19:48:02 +0200 |
| commit | ca14c996afe7228ff9b480cf225211cc17212688 (patch) | |
| tree | 4b0f3876f364968a5fb2367af44a5a0d7e3782de | |
| parent | 7f2444d38f6bbfa12bc15e2533d8f9daa85ca02b (diff) | |
x86/purgatory: Disable the stackleak GCC plugin for the purgatory
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]>
| -rw-r--r-- | arch/x86/purgatory/Makefile | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile index 10fb42da0007..b81b5172cf99 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 |