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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: Hello, seems one random WARN just changes the stat due to this commit. a642b27b991fd663 93d5440ece3c0aa341fb02e3a44 ---------------- --------------------------- fail:runs %reproduction fail:runs | | | :24 12% 3:24 dmesg.WARNING:at_include/linux/alloc_tag.h:#__pgalloc_tag_sub 5:24 -21% :24 dmesg.WARNING:at_include/linux/alloc_tag.h:#pgalloc_tag_sub below report is just FYI what we observed in our tests. kernel test robot noticed "WARNING:at_include/linux/alloc_tag.h:#__pgalloc_tag_sub" on: commit: 93d5440ece3c0aa341fb02e3a44a1b7ab44304c8 ("alloc_tag: uninline code gated by mem_alloc_profiling_key in page allocator") https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master [test failed on linus/master 900241a5cc15e6e0709a012051cc72d224cd6a6e] [test failed on linux-next/master 01c6df60d5d4ae00cd5c1648818744838bba7763] in testcase: trinity version: trinity-x86_64-ba2360ed-1_20241228 with following parameters: runtime: 300s group: group-00 nr_groups: 5 config: x86_64-randconfig-161-20250410 compiler: gcc-11 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) 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/202504151659.9b09c785-lkp@intel.com [ 147.337988][ T2016] ------------[ cut here ]------------ [ 147.338915][ T2016] alloc_tag was not set [ 147.339502][ T2016] WARNING: CPU: 0 PID: 2016 at include/linux/alloc_tag.h:152 __pgalloc_tag_sub (include/linux/alloc_tag.h:152 include/linux/alloc_tag.h:195 mm/page_alloc.c:1089) [ 147.341127][ T2016] Modules linked in: [ 147.341672][ T2016] CPU: 0 UID: 0 PID: 2016 Comm: grep Tainted: G T 6.14.0-rc6-00062-g93d5440ece3c #1 c08622b3723459177a60d595773689e527750d0d [ 147.343295][ T2016] Tainted: [T]=RANDSTRUCT [ 147.343867][ T2016] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 147.345236][ T2016] RIP: 0010:__pgalloc_tag_sub (include/linux/alloc_tag.h:152 include/linux/alloc_tag.h:195 mm/page_alloc.c:1089) [ 147.345982][ T2016] Code: 41 5e 41 5f 5d c3 49 c7 47 e0 00 00 00 00 80 3d 25 ef 66 0a 00 75 a9 48 c7 c7 e0 91 39 8e c6 05 15 ef 66 0a 01 e8 3f bb ad ff <0f> 0b eb 92 48 c7 c0 20 2b e6 90 48 ba 00 00 00 00 00 fc ff df 48 All code ======== 0: 41 5e pop %r14 2: 41 5f pop %r15 4: 5d pop %rbp 5: c3 ret 6: 49 c7 47 e0 00 00 00 movq $0x0,-0x20(%r15) d: 00 e: 80 3d 25 ef 66 0a 00 cmpb $0x0,0xa66ef25(%rip) # 0xa66ef3a 15: 75 a9 jne 0xffffffffffffffc0 17: 48 c7 c7 e0 91 39 8e mov $0xffffffff8e3991e0,%rdi 1e: c6 05 15 ef 66 0a 01 movb $0x1,0xa66ef15(%rip) # 0xa66ef3a 25: e8 3f bb ad ff call 0xffffffffffadbb69 2a:* 0f 0b ud2 <-- trapping instruction 2c: eb 92 jmp 0xffffffffffffffc0 2e: 48 c7 c0 20 2b e6 90 mov $0xffffffff90e62b20,%rax 35: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 3c: fc ff df 3f: 48 rex.W Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: eb 92 jmp 0xffffffffffffff96 4: 48 c7 c0 20 2b e6 90 mov $0xffffffff90e62b20,%rax b: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 12: fc ff df 15: 48 rex.W [ 147.348298][ T2016] RSP: 0018:ffffc90001def730 EFLAGS: 00010282 [ 147.349063][ T2016] RAX: dffffc0000000000 RBX: 1ffff920003bdee7 RCX: 0000000000000001 [ 147.350021][ T2016] RDX: 0000000000000027 RSI: 0000000000000004 RDI: ffffffff9059d5a8 [ 147.354294][ T2016] RBP: ffffc90001def7a0 R08: ffffffff87fd99d0 R09: fffffbfff20b3ab5 [ 147.355329][ T2016] R10: ffffffff9059d5ab R11: 0000000000000001 R12: ffff888106402c58 [ 147.356345][ T2016] R13: 0000000000000000 R14: 0000000000000001 R15: ffffc90001def778 [ 147.357317][ T2016] FS: 0000000000000000(0000) GS:ffffffff904be000(0000) knlGS:0000000000000000 [ 147.358402][ T2016] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 147.359199][ T2016] CR2: 00007fedda922200 CR3: 0000000155129000 CR4: 00000000000406f0 [ 147.360209][ T2016] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 147.361208][ T2016] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 147.362220][ T2016] Call Trace: [ 147.362713][ T2016] [ 147.363178][ T2016] ? show_regs (arch/x86/kernel/dumpstack.c:479) [ 147.363763][ T2016] ? __warn (kernel/panic.c:748) [ 147.364366][ T2016] ? __wake_up_klogd (arch/x86/include/asm/preempt.h:94 kernel/printk/printk.c:4525) [ 147.365015][ T2016] ? __pgalloc_tag_sub (include/linux/alloc_tag.h:152 include/linux/alloc_tag.h:195 mm/page_alloc.c:1089) [ 147.365689][ T2016] ? report_bug (lib/bug.c:201 lib/bug.c:219) [ 147.366349][ T2016] ? page_ext_get (include/linux/rcupdate.h:337 include/linux/rcupdate.h:849 mm/page_ext.c:525) [ 147.366988][ T2016] ? handle_bug (arch/x86/kernel/traps.c:285) [ 147.367583][ T2016] ? exc_invalid_op (arch/x86/kernel/traps.c:309 (discriminator 1)) [ 147.368249][ T2016] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:574) [ 147.368921][ T2016] ? irq_work_queue (arch/x86/include/asm/atomic.h:23 arch/x86/include/asm/atomic.h:145 include/linux/atomic/atomic-arch-fallback.h:1690 include/linux/atomic/atomic-instrumented.h:954 kernel/irq_work.c:61 kernel/irq_work.c:119) [ 147.369562][ T2016] ? __pgalloc_tag_sub (include/linux/alloc_tag.h:152 include/linux/alloc_tag.h:195 mm/page_alloc.c:1089) [ 147.370244][ T2016] ? __alloc_contig_migrate_range (mm/page_alloc.c:1084) [ 147.371016][ T2016] free_frozen_pages (mm/page_alloc.c:1211 mm/page_alloc.c:2738) [ 147.371700][ T2016] __free_slab (mm/slub.c:2669) [ 147.372331][ T2016] free_slab (mm/slub.c:2692) [ 147.372900][ T2016] free_to_partial_list (mm/slub.c:4414) [ 147.373569][ T2016] ? qlist_free_all (mm/kasan/quarantine.c:163 mm/kasan/quarantine.c:179) [ 147.374213][ T2016] __slab_free (mm/slub.c:4534) [ 147.374819][ T2016] ? __kasan_check_read (mm/kasan/shadow.c:32) [ 147.375470][ T2016] ? mark_lock (arch/x86/include/asm/bitops.h:227 (discriminator 3) arch/x86/include/asm/bitops.h:239 (discriminator 3) include/asm-generic/bitops/instrumented-non-atomic.h:142 (discriminator 3) kernel/locking/lockdep.c:230 (discriminator 3) kernel/locking/lockdep.c:4729 (discriminator 3)) [ 147.376062][ T2016] ? mark_held_locks (kernel/locking/lockdep.c:4323) [ 147.376701][ T2016] ___cache_free (mm/slub.c:4681) [ 147.377248][ T2016] qlist_free_all (mm/kasan/quarantine.c:174) [ 147.377795][ T2016] kasan_quarantine_reduce (include/linux/srcu.h:357 mm/kasan/quarantine.c:287) [ 147.378470][ T2016] __kasan_slab_alloc (mm/kasan/common.c:329) [ 147.379088][ T2016] kmem_cache_alloc_noprof (include/linux/kasan.h:250 mm/slub.c:4128 mm/slub.c:4177 mm/slub.c:4184) [ 147.379784][ T2016] getname_flags (include/linux/sched.h:2248 fs/namei.c:139) [ 147.380436][ T2016] getname (fs/namei.c:224) [ 147.380969][ T2016] do_sys_openat2 (fs/open.c:1422) [ 147.381587][ T2016] ? build_open_flags (fs/open.c:1414) [ 147.382258][ T2016] __x64_sys_openat (fs/open.c:1454) [ 147.382899][ T2016] ? __ia32_compat_sys_open (fs/open.c:1454) [ 147.383611][ T2016] x64_sys_call (arch/x86/entry/syscall_64.c:36) [ 147.384281][ T2016] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 147.384977][ T2016] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) [ 147.385724][ T2016] RIP: 0033:0x7fedda9e895d [ 147.386333][ T2016] Code: 48 89 54 24 e0 41 83 e2 40 75 32 89 f0 25 00 00 41 00 3d 00 00 41 00 74 24 89 f2 b8 01 01 00 00 48 89 fe bf 9c ff ff ff 0f 05 <48> 3d 00 f0 ff ff 77 33 c3 66 2e 0f 1f 84 00 00 00 00 00 48 8d 44 All code ======== 0: 48 89 54 24 e0 mov %rdx,-0x20(%rsp) 5: 41 83 e2 40 and $0x40,%r10d 9: 75 32 jne 0x3d b: 89 f0 mov %esi,%eax d: 25 00 00 41 00 and $0x410000,%eax 12: 3d 00 00 41 00 cmp $0x410000,%eax 17: 74 24 je 0x3d 19: 89 f2 mov %esi,%edx 1b: b8 01 01 00 00 mov $0x101,%eax 20: 48 89 fe mov %rdi,%rsi 23: bf 9c ff ff ff mov $0xffffff9c,%edi 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 33 ja 0x65 32: c3 ret 33: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 3a: 00 00 00 3d: 48 rex.W 3e: 8d .byte 0x8d 3f: 44 rex.R Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 33 ja 0x3b 8: c3 ret 9: 66 2e 0f 1f 84 00 00 cs nopw 0x0(%rax,%rax,1) 10: 00 00 00 13: 48 rex.W 14: 8d .byte 0x8d 15: 44 rex.R The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20250415/202504151659.9b09c785-lkp@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki