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Fri, 20 Feb 2026 06:19:29 -0800 (PST) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Fri, 20 Feb 2026 08:19:28 -0600 Message-Id: Cc: , , , Subject: Re: [PATCH] sched/core: Fix error pointer dereference From: "Ethan Tidmore" To: "Peter Zijlstra" , "Ethan Tidmore" X-Mailer: aerc 0.21.0 References: <20260217180633.524129-1-ethantidmore06@gmail.com> <20260220102047.GM1282955@noisy.programming.kicks-ass.net> In-Reply-To: <20260220102047.GM1282955@noisy.programming.kicks-ass.net> On Fri Feb 20, 2026 at 4:20 AM CST, Peter Zijlstra wrote: > On Tue, Feb 17, 2026 at 12:06:33PM -0600, Ethan Tidmore wrote: >> The function idle_thread_get() can return an error pointer and is not >> checked for one. Add check for error pointer. >>=20 >> Detected by Smatch: >> kernel/cpu.c:911 finish_cpu() error: >> 'idle' dereferencing possible ERR_PTR() > > How could this possibly happen? > Sorry about that, must be a false positive. I'll be more careful next time. Thanks, ET