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Fri, 18 Sep 2026 10:16:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1789726613; bh=VuJOT4kdOpRvZM5empbp0YF0BApQR/2NER1H6HyuVXU=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=i9JXfNnKptQjjq63WxDdIuBBUCCL146Poh1RSC+XdoWWB0Fy9dhH0a6kLZUmX1w+W qF3REZ2mxGCNIiOaSwVwjNNaV6NjoRH0sNjvZWq3XRPs6dKW4AZDk1Yede6r8fqzyx o80qLR6AMuSO9xrYinfK9dWCY6zzP/z7rF1NstRvN9oRwP7A4igRkbL4/CMivPIyT9 wnnCcsZ+tEz1MqTHyJ+d9y56CfkfVre+2Dy56b5WhLwcyAKGultFUGWzcdJ07WiKeU rZjGFcwvdwgNrDGSmopMB7dJJ/e/9den7VyfEVj7fDrOGtONqMyz83JtmkWwNL2swS Lx0epawLg3Kpw== From: sashiko-bot@kernel.org Subject: Re: [PATCH v5 05/17] arm64: kexec_file: Fix elf_headers memory leak in retry loop Reply-To: sashiko-reviews@lists.linux.dev To: maqianga@uniontech.com, dave.hansen@linux.intel.com, dakr@kernel.org, pratyush@kernel.org, vishal.l.verma@intel.com, mark.rutland@arm.com, hbathini@linux.ibm.com, linuxppc-dev@lists.ozlabs.org, kernel@xen0n.name, mpe@ellerman.id.au, sourabhjain@linux.ibm.com, eric.devolder@oracle.com, linux-fsdevel@vger.kernel.org, gshan@redhat.com, x86@kernel.org, hpa@zytor.com, lizhengyu3@huawei.com, kees@kernel.org, adityag@linux.ibm.com, ruirui.yang@linux.dev, yeoreum.yun@arm.com, chao.gao@intel.com, ardb@kernel.org, piliu@redhat.com, graf@amazon.com, james.morse@arm.com, zhangtianyang@loongson.cn, tglx@kernel.org, will@kernel.org, rppt@kernel.org, rafael@kernel.org, pasha.tatashin@soleen.com, thuth@redhat.com, akpm@linux-foundation.org, blum@kernel.org, palmer@rivosinc.com, coxu@redhat.com, linux-arm-kernel@lists.infradead.org, chenhuacai@kernel.org, robh@kernel.org, seanjc@google.com, linux-kernel@vger.kernel.org, bp@alien8.de, takahiro.akashi@linaro.org, bgwin@google.com, maddy@linux.ibm.c, om@kvack.org, linux-mm@kvack.org, liukexin@kylinos.cn, catalin.marinas@arm.com, chleroy@kernel.org, mingo@redhat.com, ruanjinjie@huawei.com, tangyouling@kylinos.cn, jbouron@amazon.com, ritesh.list@gmail.com, sshegde@linux.ibm.com, "Jinjie Ruan" , gregkh@linuxfoundation.org, leitao@debian.org, me@linux.beauty, baoquan.he@linux.dev, loongarch@lists.linux.dev, npiggin@gmail.com, kas@kernel.org, mclapinski@google.com, guodongtai@kylinos.cn, driver-core@lists.linux.dev Cc: kexec@lists.infradead.org In-Reply-To: <20260918100442.3841135-6-ruanjinjie@huawei.com> References: <20260918100442.3841135-1-ruanjinjie@huawei.com> <20260918100442.3841135-6-ruanjinjie@huawei.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 18 Sep 2026 10:16:50 +0000 Message-Id: <20260918101650.9FC741F000FF@smtp.kernel.org> X-Rspam-User: X-Rspamd-Queue-Id: 7D59780002 X-Stat-Signature: a4xtc8gang1ixzo9e89qdfdwwc76pth8 X-Rspamd-Server: rspam01 X-HE-Tag: 1789726614-364446 X-HE-Meta: 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 WZ9DcZ4B 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: > If load_other_segments() fails after image->elf_headers is assigned, > the memory lifecycle is safely managed by the global kimage object > and will be freed in arch_kimage_file_post_load_cleanup(). >=20 > However, during a retry loop in image_load(), a subsequent iteration > will allocate a new buffer and overwrite image->elf_headers. This > permanently leaks the stale memory from the previous iteration before > the global cleanup can track it. >=20 > Fix this by explicitly freeing the stale `image->elf_headers` buffer > before assigning the newly allocated headers. >=20 > Cc: Catalin Marinas > Cc: Will Deacon > Cc: Thomas Huth > Cc: Breno Leitao > Cc: Andrew Morton > Cc: Yeoreum Yun > Cc: Baoquan He > Cc: stable@vger.kernel.org > Fixes: 108aa503657e ("arm64: kexec_file: try more regions if loading segm= ents fails") > Signed-off-by: Jinjie Ruan Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260918100442.3841= 135-1-ruanjinjie@huawei.com?part=3D5