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62597edf63
The test proves that a function that is being kprobed and uses a post_handler cannot be livepatched. Only one ftrace_ops with FTRACE_OPS_FL_IPMODIFY set may be registered to any given function at a time. Note that the conflicting kprobe could not be created using the tracefs interface, see Documentation/trace/kprobetrace.rst. This interface uses only the pre_handler(), see alloc_trace_kprobe(). But FTRACE_OPS_FL_IPMODIFY is used only when the kprobe is using a post_handler, see arm_kprobe_ftrace(). Signed-off-by: Michael Vetter <mvetter@suse.com> Reviewed-by: Miroslav Benes <mbenes@suse.cz> Reviewed-by: Joe Lawrence <joe.lawrence@redhat.com> Tested-by: Marcos Paulo de Souza <mpdesouza@suse.com> Reviewed-by: Marcos Paulo de Souza <mpdesouza@suse.com> Reviewed-by: Petr Mladek <pmladek@suse.com> Tested-by: Petr Mladek <pmladek@suse.com> Link: https://lore.kernel.org/r/20241017200132.21946-4-mvetter@suse.com Signed-off-by: Petr Mladek <pmladek@suse.com>
27 lines
764 B
Makefile
27 lines
764 B
Makefile
TESTMODS_DIR := $(realpath $(dir $(abspath $(lastword $(MAKEFILE_LIST)))))
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KDIR ?= /lib/modules/$(shell uname -r)/build
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obj-m += test_klp_atomic_replace.o \
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test_klp_callbacks_busy.o \
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test_klp_callbacks_demo.o \
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test_klp_callbacks_demo2.o \
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test_klp_callbacks_mod.o \
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test_klp_kprobe.o \
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test_klp_livepatch.o \
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test_klp_shadow_vars.o \
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test_klp_state.o \
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test_klp_state2.o \
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test_klp_state3.o \
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test_klp_syscall.o
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# Ensure that KDIR exists, otherwise skip the compilation
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modules:
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ifneq ("$(wildcard $(KDIR))", "")
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$(Q)$(MAKE) -C $(KDIR) modules KBUILD_EXTMOD=$(TESTMODS_DIR)
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endif
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# Ensure that KDIR exists, otherwise skip the clean target
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clean:
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ifneq ("$(wildcard $(KDIR))", "")
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$(Q)$(MAKE) -C $(KDIR) clean KBUILD_EXTMOD=$(TESTMODS_DIR)
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endif
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