From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 66738C433F5 for ; Wed, 16 Mar 2022 15:54:06 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 083726B0071; Wed, 16 Mar 2022 11:54:06 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 032758D0002; Wed, 16 Mar 2022 11:54:05 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E3D6E8D0001; Wed, 16 Mar 2022 11:54:05 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0103.hostedemail.com [216.40.44.103]) by kanga.kvack.org (Postfix) with ESMTP id D5DF46B0071 for ; Wed, 16 Mar 2022 11:54:05 -0400 (EDT) Received: from smtpin16.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay03.hostedemail.com (Postfix) with ESMTP id 83ADB8249980 for ; Wed, 16 Mar 2022 15:54:05 +0000 (UTC) X-FDA: 79250695650.16.C1C4684 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by imf25.hostedemail.com (Postfix) with ESMTP id C1EA5A0018 for ; Wed, 16 Mar 2022 15:54:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647446044; x=1678982044; h=date:from:to:cc:subject:message-id:mime-version; bh=kIAgrvgETfe+dGPlVxh52YC4lTmGNvtMant5Fcnrcx8=; b=ELokkv+578CvTPV72hBfR3APvGx/Zou92T0Mw+zvUzGv6yI9Srnn9OHN Lfy07rd+qweoxzuVB4IqCGI/m3JcXjBb2RPYvi+qtrKOxwp0yQhrNdwHY GoiYijJd7iqQqo32z24n7phyMyG6DuO0u+cZI1y+uGMwm5yiO1tG/I6fx qATD/9KLHBClURimYVeVWutgmMJZmSbMAjs5dBftpoxGVjiZGvJusHzwW Uw2EqzePSX3nzUO8ZNaynrszRtxsQvlv8PnVyQ5xhnfCVkZPKKSaIKB8H 30D38ZG4U6IMlwTf4zdrqdHa5aX06eWWhQmIlSLpADrDb14PFpT/yD9Uw Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10288"; a="256366526" X-IronPort-AV: E=Sophos;i="5.90,187,1643702400"; d="scan'208";a="256366526" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Mar 2022 08:54:03 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,187,1643702400"; d="scan'208";a="580968434" Received: from lkp-server02.sh.intel.com (HELO 89b41b6ae01c) ([10.239.97.151]) by orsmga001.jf.intel.com with ESMTP; 16 Mar 2022 08:54:01 -0700 Received: from kbuild by 89b41b6ae01c with local (Exim 4.92) (envelope-from ) id 1nUVyK-000Ca4-09; Wed, 16 Mar 2022 15:54:00 +0000 Date: Wed, 16 Mar 2022 23:53:27 +0800 From: kernel test robot To: Beau Belgrave Cc: kbuild-all@lists.01.org, Linux Memory Management List , "Steven Rostedt (Google)" Subject: [linux-next:master 4567/12845] kernel/trace/trace_events_user.c:424:22: warning: Pointer addition with NULL pointer. [nullPointerArithmetic] Message-ID: <202203162336.PhtWQnJn-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: C1EA5A0018 Authentication-Results: imf25.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=ELokkv+5; spf=none (imf25.hostedemail.com: domain of lkp@intel.com has no SPF policy when checking 134.134.136.24) smtp.mailfrom=lkp@intel.com; dmarc=pass (policy=none) header.from=intel.com X-Rspam-User: X-Stat-Signature: j5abj9fpcmzpnxtkndn8otntj5zr7kec X-HE-Tag: 1647446044-41368 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: tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master head: a32cd981a6da2373c093d471ee4405a915e217d5 commit: aa3b2b4c669205200615dd8a2cc4af4f81fd0335 [4567/12845] user_events: Add print_fmt generation support for basic types compiler: arc-elf-gcc (GCC) 11.2.0 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot cppcheck warnings: (new ones prefixed by >>) >> kernel/trace/trace_events_user.c:424:22: warning: Pointer addition with NULL pointer. [nullPointerArithmetic] pos += snprintf(buf + pos, LEN_OR_ZERO, """); ^ kernel/trace/trace_events_user.c:456:39: note: Calling function 'user_event_set_print_fmt', 2nd argument 'NULL' value is 0 len = user_event_set_print_fmt(user, NULL, 0); ^ kernel/trace/trace_events_user.c:424:22: note: Null pointer addition pos += snprintf(buf + pos, LEN_OR_ZERO, """); ^ kernel/trace/trace_events_user.c:436:22: warning: Pointer addition with NULL pointer. [nullPointerArithmetic] pos += snprintf(buf + pos, LEN_OR_ZERO, """); ^ kernel/trace/trace_events_user.c:456:39: note: Calling function 'user_event_set_print_fmt', 2nd argument 'NULL' value is 0 len = user_event_set_print_fmt(user, NULL, 0); ^ kernel/trace/trace_events_user.c:436:22: note: Null pointer addition pos += snprintf(buf + pos, LEN_OR_ZERO, """); ^ vim +424 kernel/trace/trace_events_user.c 415 416 #define LEN_OR_ZERO (len ? len - pos : 0) 417 static int user_event_set_print_fmt(struct user_event *user, char *buf, int len) 418 { 419 struct ftrace_event_field *field, *next; 420 struct list_head *head = &user->fields; 421 int pos = 0, depth = 0; 422 const char *str_func; 423 > 424 pos += snprintf(buf + pos, LEN_OR_ZERO, "\""); 425 426 list_for_each_entry_safe_reverse(field, next, head, link) { 427 if (depth != 0) 428 pos += snprintf(buf + pos, LEN_OR_ZERO, " "); 429 430 pos += snprintf(buf + pos, LEN_OR_ZERO, "%s=%s", 431 field->name, user_field_format(field->type)); 432 433 depth++; 434 } 435 436 pos += snprintf(buf + pos, LEN_OR_ZERO, "\""); 437 438 list_for_each_entry_safe_reverse(field, next, head, link) { 439 if (user_field_is_dyn_string(field->type, &str_func)) 440 pos += snprintf(buf + pos, LEN_OR_ZERO, 441 ", %s(%s)", str_func, field->name); 442 else 443 pos += snprintf(buf + pos, LEN_OR_ZERO, 444 ", REC->%s", field->name); 445 } 446 447 return pos + 1; 448 } 449 #undef LEN_OR_ZERO 450 --- 0-DAY CI Kernel Test Service https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org