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Wed, 21 Jan 2026 00:58:24 -0800 (PST) Date: Wed, 21 Jan 2026 11:58:20 +0300 From: Dan Carpenter To: oe-kbuild@lists.linux.dev, Pasha Tatashin Cc: lkp@intel.com, oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Andrew Morton , Linux Memory Management List , Jason Gunthorpe , "Mike Rapoport (Microsoft)" Subject: kernel/liveupdate/kexec_handover.c:994 kho_preserve_vmalloc() warn: missing error code 'err' Message-ID: <202601211636.IRaejjdw-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-Rspam-User: X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 15C16160005 X-Stat-Signature: m3btpmkbpi31ht1xu6kg5bro5u8hjchi X-HE-Tag: 1768985906-691833 X-HE-Meta: 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 Ng32czFO 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 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: List-Subscribe: List-Unsubscribe: Hi Pasha, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 6c790212c588fddeb0d852f2790840753bb604b1 commit: 48a1b2321d763b5edeaf20bd4576d8c4b5df772b liveupdate: kho: move to kernel/liveupdate config: x86_64-randconfig-r071-20260121 (https://download.01.org/0day-ci/archive/20260121/202601211636.IRaejjdw-lkp@intel.com/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) rustc: rustc 1.88.0 (6b00bc388 2025-06-23) smatch version: v0.5.0-8985-g2614ff1a 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/202601211636.IRaejjdw-lkp@intel.com/ smatch warnings: kernel/liveupdate/kexec_handover.c:994 kho_preserve_vmalloc() warn: missing error code 'err' vim +/err +994 kernel/liveupdate/kexec_handover.c a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 960) int kho_preserve_vmalloc(void *ptr, struct kho_vmalloc *preservation) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 961) { a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 962) struct kho_vmalloc_chunk *chunk; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 963) struct vm_struct *vm = find_vm_area(ptr); a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 964) unsigned int order, flags, nr_contig_pages; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 965) unsigned int idx = 0; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 966) int err; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 967) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 968) if (!vm) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 969) return -EINVAL; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 970) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 971) if (vm->flags & ~KHO_VMALLOC_SUPPORTED_FLAGS) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 972) return -EOPNOTSUPP; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 973) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 974) flags = vmalloc_flags_to_kho(vm->flags); a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 975) order = get_vm_area_page_order(vm); a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 976) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 977) chunk = new_vmalloc_chunk(NULL); a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 978) if (!chunk) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 979) return -ENOMEM; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 980) KHOSER_STORE_PTR(preservation->first, chunk); a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 981) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 982) nr_contig_pages = (1 << order); a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 983) for (int i = 0; i < vm->nr_pages; i += nr_contig_pages) { a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 984) phys_addr_t phys = page_to_phys(vm->pages[i]); a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 985) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 986) err = kho_preserve_pages(vm->pages[i], nr_contig_pages); a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 987) if (err) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 988) goto err_free; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 989) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 990) chunk->phys[idx++] = phys; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 991) if (idx == ARRAY_SIZE(chunk->phys)) { a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 992) chunk = new_vmalloc_chunk(chunk); a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 993) if (!chunk) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 @994) goto err_free; err = -ENOMEM; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 995) idx = 0; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 996) } a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 997) } a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 998) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 999) preservation->total_pages = vm->nr_pages; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 1000) preservation->flags = flags; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 1001) preservation->order = order; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 1002) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 1003) return 0; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 1004) a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 1005) err_free: a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 1006) kho_vmalloc_free_chunks(preservation); a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 1007) return err; a667300bd53f27 kernel/kexec_handover.c Mike Rapoport (Microsoft 2025-09-21 1008) } -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki