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[109.81.1.107]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-47d7f41eb3bsm97977945e9.7.2026.01.07.04.24.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Jan 2026 04:24:11 -0800 (PST) From: Petr Pavlu To: Luis Chamberlain , Petr Pavlu , Daniel Gomez , Sami Tolvanen Cc: Aaron Tomlin , Peter Zijlstra , Ingo Molnar , Will Deacon , Boqun Feng , Waiman Long , Song Liu , linux-modules@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] module: Remove duplicate freeing of lockdep classes Date: Wed, 7 Jan 2026 13:22:57 +0100 Message-ID: <20260107122329.1324707-1-petr.pavlu@suse.com> X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In the error path of load_module(), under the free_module label, the code calls lockdep_free_key_range() to release lock classes associated with the MOD_DATA, MOD_RODATA and MOD_RO_AFTER_INIT module regions, and subsequently invokes module_deallocate(). Since commit ac3b43283923 ("module: replace module_layout with module_memory"), the module_deallocate() function calls free_mod_mem(), which releases the lock classes as well and considers all module regions. Attempting to free these classes twice is unnecessary. Remove the redundant code in load_module(). Signed-off-by: Petr Pavlu Acked-by: Peter Zijlstra (Intel) Acked-by: Song Liu Reviewed-by: Aaron Tomlin --- kernel/module/main.c | 6 ------ 1 file changed, 6 deletions(-) diff --git a/kernel/module/main.c b/kernel/module/main.c index 710ee30b3bea..bcd259505c8b 100644 --- a/kernel/module/main.c +++ b/kernel/module/main.c @@ -3544,12 +3544,6 @@ static int load_module(struct load_info *info, const= char __user *uargs, mutex_unlock(&module_mutex); free_module: mod_stat_bump_invalid(info, flags); - /* Free lock-classes; relies on the preceding sync_rcu() */ - for_class_mod_mem_type(type, core_data) { - lockdep_free_key_range(mod->mem[type].base, - mod->mem[type].size); - } - module_memory_restore_rox(mod); module_deallocate(mod, info); free_copy: base-commit: 3609fa95fb0f2c1b099e69e56634edb8fc03f87c --=20 2.52.0