Commit 9ba60573 authored by Juerg Haefliger's avatar Juerg Haefliger Committed by Greg Kroah-Hartman

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
...@@ -535,7 +535,9 @@ static void __exit lkdtm_module_exit(void) ...@@ -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();
unregister_jprobe(lkdtm_jprobe); if (lkdtm_jprobe != NULL)
unregister_jprobe(lkdtm_jprobe);
pr_info("Crash point unregistered\n"); pr_info("Crash point unregistered\n");
} }
......
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