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[34.16.174.112]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2beb5695f54sm25963165ad.10.2026.05.22.11.50.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 May 2026 11:50:10 -0700 (PDT) Date: Fri, 22 May 2026 18:50:06 +0000 From: Carlos Llamas To: Andrii Nakryiko Cc: mykyta.yatsenko5@gmail.com, Andrii Nakryiko , Eduard Zingerman , Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Kumar Kartikeya Dwivedi , Song Liu , Yonghong Song , Jiri Olsa , kernel-team@android.com, linux-kernel@vger.kernel.org, Mykyta Yatsenko , "open list:BPF [GENERAL] (Safe Dynamic Programs and Tools)" Subject: Re: [PATCH v3] libbpf: fix UAF in strset__add_str() Message-ID: References: <20260518050550.2600101-1-cmllamas@google.com> 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-Disposition: inline In-Reply-To: On Fri, May 22, 2026 at 11:35:58AM -0700, Andrii Nakryiko wrote: > > > > sashiko suggests to use uintptr_t for this detection to avoid > > undefined behavior, let's do that then)? > > > > but other than that and a nit below, looks good, thanks! > > > > pw-bot: cr > > Ping. Carlos, are you planning to send a follow up? Hey Andrii sorry about the delay I got caught up with something else here. I'll send a new version in a bit with the uintptr_t casting and your suggestion. I would just say that it is a bit unfortunate that we'll have to clutter the code with this kind of parsing to avoid the compiler behavior that was mentioned. :( Thanks, Carlos Llamas