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Message-ID: <202410302020.1jHBLfss-lkp@intel.com> 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 BCC: lkp@intel.com CC: oe-kbuild-all@lists.linux.dev TO: Andrii Nakryiko CC: Peter Zijlstra tree: https://git.kernel.org/pub/scm/linux/kernel/git/peterz/queue.git perf/core head: 72a27524a4939fc0958796a46b51c1fab3729367 commit: 72a27524a4939fc0958796a46b51c1fab3729367 [21/21] uprobes: SRCU-protect uretprobe lifetime (with timeout) :::::: branch date: 2 days ago :::::: commit date: 2 days ago config: i386-randconfig-141-20241030 (https://download.01.org/0day-ci/archive/20241030/202410302020.1jHBLfss-lkp@intel.com/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 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/202410302020.1jHBLfss-lkp@intel.com/ smatch warnings: kernel/events/uprobes.c:718 hprobe_consume() error: uninitialized symbol 'state'. vim +/state +718 kernel/events/uprobes.c 72a27524a4939f Andrii Nakryiko 2024-10-23 695 72a27524a4939f Andrii Nakryiko 2024-10-23 696 /* 72a27524a4939f Andrii Nakryiko 2024-10-23 697 * hprobe_consume() fetches hprobe's underlying uprobe and detects whether 72a27524a4939f Andrii Nakryiko 2024-10-23 698 * uprobe is SRCU protected or is refcounted. hprobe_consume() can be 72a27524a4939f Andrii Nakryiko 2024-10-23 699 * used only once for a given hprobe. 72a27524a4939f Andrii Nakryiko 2024-10-23 700 * 72a27524a4939f Andrii Nakryiko 2024-10-23 701 * Caller has to call hprobe_finalize() and pass previous hprobe_state, so 72a27524a4939f Andrii Nakryiko 2024-10-23 702 * that hprobe_finalize() can perform SRCU unlock or put uprobe, whichever 72a27524a4939f Andrii Nakryiko 2024-10-23 703 * is appropriate. 72a27524a4939f Andrii Nakryiko 2024-10-23 704 */ 72a27524a4939f Andrii Nakryiko 2024-10-23 705 static inline struct uprobe *hprobe_consume(struct hprobe *hprobe, enum hprobe_state *hstate) 72a27524a4939f Andrii Nakryiko 2024-10-23 706 { 72a27524a4939f Andrii Nakryiko 2024-10-23 707 enum hprobe_state state; 72a27524a4939f Andrii Nakryiko 2024-10-23 708 72a27524a4939f Andrii Nakryiko 2024-10-23 709 *hstate = xchg(&hprobe->state, HPROBE_CONSUMED); 72a27524a4939f Andrii Nakryiko 2024-10-23 710 switch (*hstate) { 72a27524a4939f Andrii Nakryiko 2024-10-23 711 case HPROBE_LEASED: 72a27524a4939f Andrii Nakryiko 2024-10-23 712 case HPROBE_STABLE: 72a27524a4939f Andrii Nakryiko 2024-10-23 713 return hprobe->uprobe; 72a27524a4939f Andrii Nakryiko 2024-10-23 714 case HPROBE_GONE: /* uprobe is NULL, no SRCU */ 72a27524a4939f Andrii Nakryiko 2024-10-23 715 case HPROBE_CONSUMED: /* uprobe was finalized already, do nothing */ 72a27524a4939f Andrii Nakryiko 2024-10-23 716 return NULL; 72a27524a4939f Andrii Nakryiko 2024-10-23 717 default: 72a27524a4939f Andrii Nakryiko 2024-10-23 @718 WARN(1, "hprobe invalid state %d", state); 72a27524a4939f Andrii Nakryiko 2024-10-23 719 return NULL; 72a27524a4939f Andrii Nakryiko 2024-10-23 720 } 72a27524a4939f Andrii Nakryiko 2024-10-23 721 } 72a27524a4939f Andrii Nakryiko 2024-10-23 722 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki