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Tue, 02 Feb 2021 19:24:07 -0800 (PST) Received: from localhost ([2409:10:2e40:5100:6e29:95ff:fe2d:8f34]) by smtp.gmail.com with ESMTPSA id s21sm350802pga.12.2021.02.02.19.24.04 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Feb 2021 19:24:05 -0800 (PST) Date: Wed, 3 Feb 2021 12:24:03 +0900 From: Sergey Senozhatsky To: Timur Tabi Cc: Petr Mladek , Steven Rostedt , Sergey Senozhatsky , linux-kernel@vger.kernel.org, vbabka@suse.cz, linux-mm@kvack.org, willy@infradead.org, akpm@linux-foundation.org, torvalds@linux-foundation.org, roman.fietze@magna.com, keescook@chromium.org, john.ogness@linutronix.de, akinobu.mita@gmail.com Subject: Re: [PATCH][RESEND] lib/vsprintf: make-printk-non-secret printks all addresses as unhashed Message-ID: References: <20210202213633.755469-1-timur@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20210202213633.755469-1-timur@kernel.org> 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: On (21/02/02 15:36), Timur Tabi wrote: > If the make-printk-non-secret command-line parameter is set, then > printk("%p") will print addresses as unhashed. This is useful for > debugging purposes. > > A large warning message is displayed if this option is enabled, > because unhashed addresses, while useful for debugging, exposes > kernel addresses which can be a security risk. > > Signed-off-by: Timur Tabi Looks good to me. Acked-by: Sergey Senozhatsky -ss