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plugins/sudoers/sudoers_debug.c: fix harmless debug deregistration warning

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If the debug sudoers subsystem is not registered, because it does not
get any file names to deal with (TAILQ_EMPTY(debug_files)), deregistration
of the subsystem outputs a warning:

  sudo: sudo_debug_deregister_v1: invalid instance ID -1, max -1

This patch prevents that by only increasing the refcount if the
debug_instance was registered successfully.
This commit is contained in:
Robert Manner 2020-01-02 16:24:54 +01:00 committed by Todd C. Miller
parent 3e9d15a4da
commit 972ea1448e
1 changed files with 2 additions and 1 deletions
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3
plugins/sudoers/sudoers_debug.c
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@ -138,6 +138,8 @@ sudoers_debug_register(const char *program,
sudoers_subsystem_names, sudoers_subsystem_ids, debug_files); sudoers_subsystem_names, sudoers_subsystem_ids, debug_files);
if (sudoers_debug_instance == SUDO_DEBUG_INSTANCE_ERROR) if (sudoers_debug_instance == SUDO_DEBUG_INSTANCE_ERROR)
return false; return false;
sudoers_debug_refcnt++;
} }
TAILQ_FOREACH_SAFE(debug_file, debug_files, entries, debug_next) { TAILQ_FOREACH_SAFE(debug_file, debug_files, entries, debug_next) {
TAILQ_REMOVE(debug_files, debug_file, entries); TAILQ_REMOVE(debug_files, debug_file, entries);
@ -146,7 +148,6 @@ sudoers_debug_register(const char *program,
free(debug_file); free(debug_file);
} }
} }
sudoers_debug_refcnt++;
return true; return true;
} }