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Sat, 09 May 2026 06:37:23 -0700 (PDT) Received: from localhost ([185.141.119.51]) by smtp.gmail.com with ESMTPSA id af79cd13be357-907b87c415fsm538354985a.28.2026.05.09.06.37.21 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 09 May 2026 06:37:22 -0700 (PDT) Date: Sat, 9 May 2026 16:37:17 +0300 From: Dan Carpenter To: Tetsuo Handa Cc: oe-kbuild@lists.linux.dev, lkp@intel.com, oe-kbuild-all@lists.linux.dev Subject: Re: [linux-next:master 4172/4394] drivers/block/loop.c:413 lo_rw_aio() error: we previously assumed 'file' could be null (see line 400) Message-ID: References: <202605092030.FAH71Jou-lkp@intel.com> <89472180-8c8e-4fd8-87bc-7122d93e6c2c@I-love.SAKURA.ne.jp> Precedence: bulk X-Mailing-List: oe-kbuild@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <89472180-8c8e-4fd8-87bc-7122d93e6c2c@I-love.SAKURA.ne.jp> On Sat, May 09, 2026 at 10:32:06PM +0900, Tetsuo Handa wrote: > On 2026/05/09 22:19, Dan Carpenter wrote: > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > > head: e98d21c170b01ddef366f023bbfcf6b31509fa83 > > commit: 1a83d226268cfb9ea546febe6515f39584df8fd2 [4172/4394] loop: check refcount in __loop_clr_fd() and lo_rw_aio() > > config: m68k-randconfig-r073-20260509 (https://download.01.org/0day-ci/archive/20260509/202605092030.FAH71Jou-lkp@intel.com/config) > > compiler: m68k-linux-gcc (GCC) 12.5.0 > > smatch: v0.5.0-9065-ge9cc34fd > > > > If you fix the issue in a separate patch/commit (i.e. not just a new version of > > the same patch/commit), kindly add following tags > > | Reported-by: kernel test robot > > | Reported-by: Dan Carpenter > > | Closes: https://lore.kernel.org/r/202605092030.FAH71Jou-lkp@intel.com/ > > > > New smatch warnings: > > drivers/block/loop.c:413 lo_rw_aio() error: we previously assumed 'file' could be null (see line 400) > > Thanks, but this is intentional in order to get reported > at https://syzkaller.appspot.com/bug?extid=cd8a9a308e879a4e2c28 > after printing debug information. With these zero day bots, I just have access to the email which you see, not the commit itself. Maybe one idea is we add a comment when we're adding linux-next only debug code? On the other hand, reviewing and sending these emails is very fast and costs me no time at all so I don't mind either way. regards, dan carpenter