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[94.66.118.61]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-46028a6dce6sm15969430f8f.30.2026.06.05.02.13.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Jun 2026 02:13:35 -0700 (PDT) Date: Fri, 5 Jun 2026 05:13:32 -0400 From: "Michael S. Tsirkin" To: kernel test robot Cc: oe-lkp@lists.linux.dev, lkp@intel.com, linux-mm@kvack.org Subject: Re: [linux-next:master] [mm] 504f40f6bd: kernel_BUG_at_include/linux/page-flags.h Message-ID: <20260605050955-mutt-send-email-mst@kernel.org> References: <202606051117.7b999010-lkp@intel.com> Precedence: bulk X-Mailing-List: oe-lkp@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In-Reply-To: <202606051117.7b999010-lkp@intel.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 4MPubCbjifZ2sGVpWX3Bu35p14KeN6t-ZUV7ltzA6hc_1780650817 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=us-ascii Content-Disposition: inline On Fri, Jun 05, 2026 at 01:40:41PM +0800, kernel test robot wrote: > > > Hello, > > kernel test robot noticed "kernel_BUG_at_include/linux/page-flags.h" on: > > commit: 504f40f6bda6afb3c5dc9924f74c583b6e394554 ("mm: page_reporting: skip redundant zeroing of host-zeroed reported pages") > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master > > [test failed on linux-next/master a225caacc36546a09586e3ece36c0313146e7da9] > > in testcase: boot > > config: i386-randconfig-002-20251019 > compiler: gcc-14 > test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 32G > > (please refer to attached dmesg/kmsg for entire log/backtrace) > Gift that keeps giving. Same thing - I pushed a wrong branch to next :( Sorry. Made it a separate remote now so these pushes are intentional. Donnu why I didn't think of that earlier. > > 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 > | Closes: https://lore.kernel.org/oe-lkp/202606051117.7b999010-lkp@intel.com > > > > [ 0.218502][ T0] ------------[ cut here ]------------ > [ 0.219180][ T0] kernel BUG at include/linux/page-flags.h:688! > [ 0.219979][ T0] Oops: invalid opcode: 0000 [#1] > [ 0.220604][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper Not tainted 7.0.0-rc2-00009-g504f40f6bda6 #1 PREEMPTLAZY 25f758a7ca9ac6ee8258fdb39cd5b7566f523e33 > [ 0.222356][ T0] EIP: post_alloc_hook (linux/page-flags.h:688 (discriminator 1) page_alloc.c:1868 (discriminator 1)) > [ 0.222995][ T0] Code: 83 7d f0 1f 0f 87 10 01 00 00 83 c4 10 5b 5e 5f 5d 31 c0 31 d2 31 c9 c3 8d b6 00 00 00 00 ba 44 7a 3c 9d 89 f0 e8 f4 31 fc ff <0f> 0b b8 14 5e a0 9d e8 90 53 cb ff 2e 8d b4 26 00 00 00 00 8b 45 > All code > ======== > 0: 83 7d f0 1f cmpl $0x1f,-0x10(%rbp) > 4: 0f 87 10 01 00 00 ja 0x11a > a: 83 c4 10 add $0x10,%esp > d: 5b pop %rbx > e: 5e pop %rsi > f: 5f pop %rdi > 10: 5d pop %rbp > 11: 31 c0 xor %eax,%eax > 13: 31 d2 xor %edx,%edx > 15: 31 c9 xor %ecx,%ecx > 17: c3 ret > 18: 8d b6 00 00 00 00 lea 0x0(%rsi),%esi > 1e: ba 44 7a 3c 9d mov $0x9d3c7a44,%edx > 23: 89 f0 mov %esi,%eax > 25: e8 f4 31 fc ff call 0xfffffffffffc321e > 2a:* 0f 0b ud2 <-- trapping instruction > 2c: b8 14 5e a0 9d mov $0x9da05e14,%eax > 31: e8 90 53 cb ff call 0xffffffffffcb53c6 > 36: 2e 8d b4 26 00 00 00 cs lea 0x0(%rsi,%riz,1),%esi > 3d: 00 > 3e: 8b .byte 0x8b > 3f: 45 rex.RB > > Code starting with the faulting instruction > =========================================== > 0: 0f 0b ud2 > 2: b8 14 5e a0 9d mov $0x9da05e14,%eax > 7: e8 90 53 cb ff call 0xffffffffffcb539c > c: 2e 8d b4 26 00 00 00 cs lea 0x0(%rsi,%riz,1),%esi > 13: 00 > 14: 8b .byte 0x8b > 15: 45 rex.RB > [ 0.225477][ T0] EAX: 00000000 EBX: 00000000 ECX: 00000000 EDX: 00000000 > [ 0.226363][ T0] ESI: f4102340 EDI: 9dc37ba0 EBP: 9d633e20 ESP: 9d633e04 > [ 0.227277][ T0] DS: 007b ES: 007b FS: 0000 GS: 0000 SS: 0068 EFLAGS: 00210046 > [ 0.228243][ T0] CR0: 80050033 CR2: ffd99000 CR3: 1dd74000 CR4: 00000090 > [ 0.229132][ T0] Call Trace: > [ 0.229534][ T0] get_page_from_freelist (page_alloc.c:1938 page_alloc.c:4006) > [ 0.230201][ T0] ? __this_cpu_preempt_check (smp_processor_id.c:64) > [ 0.230883][ T0] __alloc_frozen_pages_noprof (page_alloc.c:5297) > [ 0.231617][ T0] allocate_slab (slub.c:3269 (discriminator 2) slub.c:3458 (discriminator 2)) > [ 0.232174][ T0] refill_objects (slub.c:3516 slub.c:7153) > [ 0.232743][ T0] __pcs_replace_empty_main (slub.c:2818 slub.c:2839 slub.c:4602) > [ 0.233433][ T0] ? mm_alloc (fork.c:1157 (discriminator 2)) > [ 0.233945][ T0] kmem_cache_alloc_noprof (slub.c:4695 slub.c:4829 slub.c:4851) > [ 0.234624][ T0] ? kmem_cache_alloc_noprof (slub.c:4689 (discriminator 2) slub.c:4829 (discriminator 2) slub.c:4851 (discriminator 2)) > [ 0.235315][ T0] mm_alloc (fork.c:1157 (discriminator 2)) > [ 0.235814][ T0] poking_init (x86/mm/init.c:824) > [ 0.236341][ T0] start_kernel (main.c:1072) > [ 0.237088][ T0] i386_start_kernel (x86/kernel/head32.c:79) > [ 0.237969][ T0] startup_32_smp (x86/kernel/head_32.S:292) > [ 0.238817][ T0] Modules linked in: > [ 0.239561][ T0] ---[ end trace 0000000000000000 ]--- > [ 0.240564][ T0] EIP: post_alloc_hook (linux/page-flags.h:688 (discriminator 1) page_alloc.c:1868 (discriminator 1)) > [ 0.241521][ T0] Code: 83 7d f0 1f 0f 87 10 01 00 00 83 c4 10 5b 5e 5f 5d 31 c0 31 d2 31 c9 c3 8d b6 00 00 00 00 ba 44 7a 3c 9d 89 f0 e8 f4 31 fc ff <0f> 0b b8 14 5e a0 9d e8 90 53 cb ff 2e 8d b4 26 00 00 00 00 8b 45 > All code > ======== > 0: 83 7d f0 1f cmpl $0x1f,-0x10(%rbp) > 4: 0f 87 10 01 00 00 ja 0x11a > a: 83 c4 10 add $0x10,%esp > d: 5b pop %rbx > e: 5e pop %rsi > f: 5f pop %rdi > 10: 5d pop %rbp > 11: 31 c0 xor %eax,%eax > 13: 31 d2 xor %edx,%edx > 15: 31 c9 xor %ecx,%ecx > 17: c3 ret > 18: 8d b6 00 00 00 00 lea 0x0(%rsi),%esi > 1e: ba 44 7a 3c 9d mov $0x9d3c7a44,%edx > 23: 89 f0 mov %esi,%eax > 25: e8 f4 31 fc ff call 0xfffffffffffc321e > 2a:* 0f 0b ud2 <-- trapping instruction > 2c: b8 14 5e a0 9d mov $0x9da05e14,%eax > 31: e8 90 53 cb ff call 0xffffffffffcb53c6 > 36: 2e 8d b4 26 00 00 00 cs lea 0x0(%rsi,%riz,1),%esi > 3d: 00 > 3e: 8b .byte 0x8b > 3f: 45 rex.RB > > Code starting with the faulting instruction > =========================================== > 0: 0f 0b ud2 > 2: b8 14 5e a0 9d mov $0x9da05e14,%eax > 7: e8 90 53 cb ff call 0xffffffffffcb539c > c: 2e 8d b4 26 00 00 00 cs lea 0x0(%rsi,%riz,1),%esi > 13: 00 > 14: 8b .byte 0x8b > 15: 45 rex.RB > > > The kernel config and materials to reproduce are available at: > https://download.01.org/0day-ci/archive/20260605/202606051117.7b999010-lkp@intel.com > > > > -- > 0-DAY CI Kernel Test Service > https://github.com/intel/lkp-tests/wiki