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[92.21.50.228]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4926c285fc1sm167243165e9.1.2026.06.28.11.44.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 28 Jun 2026 11:44:06 -0700 (PDT) Date: Sun, 28 Jun 2026 19:44:04 +0100 From: David Laight To: Christian Brauner Cc: Jann Horn , John Ericson , Farid Zakaria , Jan Kara , Kees Cook , Al Viro , shuah@kernel.org, linux-fsdevel , linux-mm , linux-kselftest , LKML Subject: Re: [PATCH 0/2] fs: support $ORIGIN in ELF interpreter paths Message-ID: <20260628194404.40253a7d@pumpkin> In-Reply-To: <20260628-debatten-vertagen-amortisieren-3bf518773e75@brauner> References: <20260622043934.179879-1-farid.m.zakaria@gmail.com> <24420045-a6eb-4999-ab19-1e344eaba8a4@app.fastmail.com> <20260625-atomkraftgegner-hunger-kursbuch-b452ff2becab@brauner> <20260628-ungeordnet-orgel-stechen-36dd64038541@brauner> <20260628-debatten-vertagen-amortisieren-3bf518773e75@brauner> X-Mailer: Claws Mail 4.1.1 (GTK 3.24.38; arm-unknown-linux-gnueabihf) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Sun, 28 Jun 2026 15:20:11 +0200 Christian Brauner wrote: ... > All of that needs consistent, easy to reason about treatment. Reading through > the glibc implementation of $ORIGIN for shared libraries in rpath - even with > an eye on cutting through most of the complexity - doesn't give me very warm > feelings. It feels very hackish and full of edge cases... I'm sure that NetBSD refused to implement $ORIGIN because it was full of loopholes. You'd need the kernel to hold a reference to the directory inode and have a 'magic' argument to openat() to be relative to that directory rather than cwd. David