Messages in this thread Patch in this message | | | From | Thomas Meyer <> | Subject | [PATCH] um: Fix kcov crash before kernel is started. | Date | Sat, 14 Oct 2017 00:00:25 +0200 |
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UMLs current_thread_info() unconditionally assumes that the top of the stack contains the thread_info structure. Prevent kcov from using invalid curent_thread_info() data by disable instrumentation of early startup code.
Signed-off-by: Thomas Meyer <thomas@m3y3r.de> --- arch/um/kernel/skas/Makefile | 2 ++ lib/Makefile | 4 ++++ 2 files changed, 6 insertions(+)
diff --git a/arch/um/kernel/skas/Makefile b/arch/um/kernel/skas/Makefile index 0b76d8869c94..df3aedb974a2 100644 --- a/arch/um/kernel/skas/Makefile +++ b/arch/um/kernel/skas/Makefile @@ -3,6 +3,8 @@ # Licensed under the GPL # +KCOV_INSTRUMENT := n + obj-y := clone.o mmu.o process.o syscall.o uaccess.o # clone.o is in the stub, so it can't be built with profiling diff --git a/lib/Makefile b/lib/Makefile index dafa79613fb4..18319ad5daab 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -16,6 +16,10 @@ KCOV_INSTRUMENT_list_debug.o := n KCOV_INSTRUMENT_debugobjects.o := n KCOV_INSTRUMENT_dynamic_debug.o := n +ifdef CONFIG_UML +KCOV_INSTRUMENT_cmdline.o := n +endif + lib-y := ctype.o string.o vsprintf.o cmdline.o \ rbtree.o radix-tree.o dump_stack.o timerqueue.o\ idr.o int_sqrt.o extable.o \ -- 2.11.0
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