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b=k4SggvOd4BbUbbGwaWFPdPRseaOkhRGGpexIV08g70d9iEWifpyMcHKg1LDKhagxb X73aX3cyNra2YQJQYXiUrPpRXEjmEImKKuMFsLhD62OU6yN1wmci+wvDeF3PkMUota NnzUIVAAyJ5GmDDpNPiAQvA2UKguSTveJwuqMti483XoZH4JtePjPcbk0fG8QozNWM rfYDgshAh+BKzbWevQChmBmw8nuwjdklhR0lGWT53q7FGw3IjDG/pKVPiIzKATwmxI WtyuT5A0cPe2iwRRD+02ucfirVq48nuR2WihTkaDccXlV3ixklm/IyUa94iEQo6mur NMLqBhZPXxLMA== From: Kees Cook To: linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Svetlana Parfenova Cc: Kees Cook , paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, alex@ghiti.f, viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz, akpm@linux-foundation.org, david@redhat.com, lorenzo.stoakes@oracle.com, Liam.Howlett@oracle.com, vbabka@suse.cz, rppt@kernel.org, surenb@google.com, mhocko@suse.com Subject: Re: [RFC RESEND v3] binfmt_elf: preserve original ELF e_flags for core dumps Date: Wed, 3 Sep 2025 20:52:40 -0700 Message-Id: <175695795639.3712216.15743949549231818751.b4-ty@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250901135350.619485-1-svetlana.parfenova@syntacore.com> References: <20250806161814.607668-1-svetlana.parfenova@syntacore.com> <20250901135350.619485-1-svetlana.parfenova@syntacore.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 9427CC000F X-Stat-Signature: 7t8soqsss49pixp74bsnnky51jt33cr6 X-Rspam-User: X-HE-Tag: 1756957965-853680 X-HE-Meta: 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 3cbTCbh2 NUg4Gu/MZ6nhV7XuCSs5cQrO6ilcNyTScHmvBjgL2rBNim4i6S8X7zbACb+HJRyN9ilhKHi2WjBFHiwLbm2UiZ5SejRcKZqfEs9Zy0PQBatqpSlwddVP9ouQF5hTdfAn8+n0S3x6hkk03YLWmZvyaD9CD1UmT9j0IuscPnc8zMTqCJyuBRCA9iIEZnfLsv9Y2ksAxPR8gnvv3qvgkkp7TnRHsx5lb/5axOe2t9wziCUgm+xcSnqZrMkgpp/0X92o1iCSu X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, 01 Sep 2025 20:53:50 +0700, Svetlana Parfenova wrote: > Some architectures, such as RISC-V, use the ELF e_flags field to encode > ABI-specific information (e.g., ISA extensions, fpu support). Debuggers > like GDB rely on these flags in core dumps to correctly interpret > optional register sets. If the flags are missing or incorrect, GDB may > warn and ignore valid data, for example: > > warning: Unexpected size of section '.reg2/213' in core file. > > [...] Applied to for-next/execve, thanks! [1/1] binfmt_elf: preserve original ELF e_flags for core dumps https://git.kernel.org/kees/c/8c94db0ae97c Take care, -- Kees Cook