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Commit 9ba60573 authored by Juerg Haefliger's avatar Juerg Haefliger Committed by Greg Kroah-Hartman
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lkdtm: Fix Oops when unloading the module 



No jprobe is registered when the module is loaded without specifying a
crashpoint that uses a jprobe. At the moment, we unconditionally try to
unregister the jprobe on module unload which results in an Oops. Add a
check to fix this.

Signed-off-by: default avatarJuerg Haefliger <juerg.haefliger@hpe.com>
Acked-by: default avatarKees Cook <keescook@chromium.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 8ade6039

drivers/misc/lkdtm_core.c

+3 −1
Original line number Original line Diff line number Diff line
@@ -535,7 +535,9 @@ static void __exit lkdtm_module_exit(void) 
	/* Handle test-specific clean-up. */

	/* Handle test-specific clean-up. */

	lkdtm_usercopy_exit();

	lkdtm_usercopy_exit();





	if (lkdtm_jprobe != NULL)

		unregister_jprobe(lkdtm_jprobe);

		unregister_jprobe(lkdtm_jprobe);



	pr_info("Crash point unregistered\n");

	pr_info("Crash point unregistered\n");

}

}