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Sun, 19 Jul 2026 12:40:13 -0700 (PDT) Received: from ryzen.lan ([2601:644:8000:7a86::e35]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-38e3a0fb993sm6308126a91.15.2026.07.19.12.40.10 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 19 Jul 2026 12:40:11 -0700 (PDT) From: Rosen Penev To: linux-edac@vger.kernel.org Cc: Frank Li , Borislav Petkov , Tony Luck , Nathan Chancellor , Nick Desaulniers , Bill Wendling , Justin Stitt , York Sun , imx@lists.linux.dev (open list:EDAC-FSL_DDR), linux-kernel@vger.kernel.org (open list), llvm@lists.linux.dev (open list:CLANG/LLVM BUILD SUPPORT:Keyword:\b(?i:clang|llvm)\b) Subject: [PATCH 0/2] EDAC: fsl_ddr: probe failure and remove lifetime fixes Date: Sun, 19 Jul 2026 12:40:07 -0700 Message-ID: <20260719194009.117532-1-rosenp@gmail.com> X-Mailer: git-send-email 2.55.0 Precedence: bulk X-Mailing-List: imx@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This series fixes two lifetime/error-path issues in the FSL DDR EDAC driver (drivers/edac/fsl_ddr_edac.c): * Patch 1: On probe failure, fsl_mc_err_probe() leaves the memory controller hardware configured to generate interrupts (DISABLE cleared, INT_EN set) while no handler is registered, which can trigger an unhandled interrupt storm on the shared IRQ line. Restore the MC error registers in both error paths. * Patch 2: The devm-requested IRQ passes mci as context, but fsl_mc_err_remove() frees mci via edac_mc_free() before devres tears down the IRQ, leaving a use-after-free window for the shared interrupt handler. Manage mci lifetime through devres so it is freed only after the IRQ is released. Both patches are build-tested for arm64 (defconfig + CONFIG_EDAC_FSL_DDR) with LLVM=1. Rosen Penev (2): EDAC: fsl_ddr: restore MC error registers on probe failure EDAC: fsl_ddr: manage mci lifetime via devres to fix remove UAF drivers/edac/fsl_ddr_edac.c | 42 +++++++++++++++++++++++-------------- 1 file changed, 26 insertions(+), 16 deletions(-) -- 2.55.0