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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, kernel test robot noticed "WARNING:at_lib/percpu-refcount.c:#__percpu_ref_switch_to_managed" on: commit: 59b177cbdc4908a728329b8eec742969a2285979 ("[RFC 6/6] apparmor: Switch labels to percpu ref managed mode") url: https://github.com/intel-lab-lkp/linux/commits/Neeraj-Upadhyay/percpu-refcount-Add-managed-mode-for-RCU-released-objects/20240916-131210 base: https://git.kernel.org/cgit/linux/kernel/git/akpm/mm.git mm-nonmm-unstable patch link: https://lore.kernel.org/all/20240916050811.473556-7-Neeraj.Upadhyay@amd.com/ patch subject: [RFC 6/6] apparmor: Switch labels to percpu ref managed mode in testcase: boot compiler: gcc-12 test machine: qemu-system-x86_64 -enable-kvm -cpu SandyBridge -smp 2 -m 16G (please refer to attached dmesg/kmsg for entire log/backtrace) +------------------------------------------------------------------+------------+------------+ | | 124f137c55 | 59b177cbdc | +------------------------------------------------------------------+------------+------------+ | WARNING:at_lib/percpu-refcount.c:#__percpu_ref_switch_to_managed | 0 | 13 | | RIP:__percpu_ref_switch_to_managed | 0 | 13 | +------------------------------------------------------------------+------------+------------+ 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/202409181358.c07681be-oliver.sang@intel.com [ 13.041399][ T0] ------------[ cut here ]------------ [ 13.042302][ T0] Percpu ref is already managed [ 13.042302][ T0] WARNING: CPU: 0 PID: 0 at lib/percpu-refcount.c:151 __percpu_ref_switch_to_managed (lib/percpu-refcount.c:151 (discriminator 3)) [ 13.042302][ T0] Modules linked in: [ 13.042302][ T0] CPU: 0 UID: 0 PID: 0 Comm: swapper/0 Not tainted 6.11.0-rc6-00143-g59b177cbdc49 #12 [ 13.042302][ T0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 13.042302][ T0] RIP: 0010:__percpu_ref_switch_to_managed (lib/percpu-refcount.c:151 (discriminator 3)) [ 13.042302][ T0] Code: 03 75 58 65 48 ff 08 e8 c1 7c ee fe eb b1 80 3d 5d a2 ca 03 00 75 c5 48 c7 c7 c0 61 8f 91 c6 05 4d a2 ca 03 01 e8 03 af ce fe <0f> 0b eb ae 31 f6 48 89 df e8 05 f7 ff ff e9 54 fe ff ff e8 4b aa All code ======== 0: 03 75 58 add 0x58(%rbp),%esi 3: 65 48 ff 08 decq %gs:(%rax) 7: e8 c1 7c ee fe callq 0xfffffffffeee7ccd c: eb b1 jmp 0xffffffffffffffbf e: 80 3d 5d a2 ca 03 00 cmpb $0x0,0x3caa25d(%rip) # 0x3caa272 15: 75 c5 jne 0xffffffffffffffdc 17: 48 c7 c7 c0 61 8f 91 mov $0xffffffff918f61c0,%rdi 1e: c6 05 4d a2 ca 03 01 movb $0x1,0x3caa24d(%rip) # 0x3caa272 25: e8 03 af ce fe callq 0xfffffffffeceaf2d 2a:* 0f 0b ud2 <-- trapping instruction 2c: eb ae jmp 0xffffffffffffffdc 2e: 31 f6 xor %esi,%esi 30: 48 89 df mov %rbx,%rdi 33: e8 05 f7 ff ff callq 0xfffffffffffff73d 38: e9 54 fe ff ff jmpq 0xfffffffffffffe91 3d: e8 .byte 0xe8 3e: 4b aa rex.WXB stos %al,%es:(%rdi) Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: eb ae jmp 0xffffffffffffffb2 4: 31 f6 xor %esi,%esi 6: 48 89 df mov %rbx,%rdi 9: e8 05 f7 ff ff callq 0xfffffffffffff713 e: e9 54 fe ff ff jmpq 0xfffffffffffffe67 13: e8 .byte 0xe8 14: 4b aa rex.WXB stos %al,%es:(%rdi) [ 13.042302][ T0] RSP: 0000:ffffffff92407e00 EFLAGS: 00010082 [ 13.042302][ T0] RAX: 0000000000000000 RBX: ffff8881008a6500 RCX: 1ffffffff24a3780 [ 13.042302][ T0] RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000001 [ 13.042302][ T0] RBP: ffff8881008a6508 R08: 0000000000000000 R09: fffffbfff24a3780 [ 13.042302][ T0] R10: ffffffff9251bc03 R11: 0000000000000001 R12: ffff8881001f3500 [ 13.042302][ T0] R13: ffff8881001f3500 R14: 0000000000000005 R15: 00000000000147b0 [ 13.042302][ T0] FS: 0000000000000000(0000) GS:ffff8883a8400000(0000) knlGS:0000000000000000 [ 13.042302][ T0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 13.042302][ T0] CR2: ffff88843ffff000 CR3: 00000003b6e62000 CR4: 00000000000006f0 [ 13.042302][ T0] Call Trace: [ 13.042302][ T0] [ 13.042302][ T0] ? __warn (kernel/panic.c:741) [ 13.042302][ T0] ? __percpu_ref_switch_to_managed (lib/percpu-refcount.c:151 (discriminator 3)) [ 13.042302][ T0] ? report_bug (lib/bug.c:180 lib/bug.c:219) [ 13.042302][ T0] ? handle_bug (arch/x86/kernel/traps.c:239) [ 13.042302][ T0] ? exc_invalid_op (arch/x86/kernel/traps.c:260 (discriminator 1)) [ 13.042302][ T0] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:621) [ 13.042302][ T0] ? __percpu_ref_switch_to_managed (lib/percpu-refcount.c:151 (discriminator 3)) [ 13.042302][ T0] percpu_ref_switch_to_managed (include/linux/spinlock.h:406 lib/percpu-refcount.c:182) [ 13.042302][ T0] aa_alloc_root_ns (security/apparmor/policy_ns.c:383) [ 13.042302][ T0] ? aa_setup_dfa_engine (security/apparmor/lsm.c:2194) [ 13.042302][ T0] apparmor_init (security/apparmor/lsm.c:2235) [ 13.042302][ T0] initialize_lsm (security/security.c:263 (discriminator 3)) [ 13.042302][ T0] ordered_lsm_init (security/security.c:422 (discriminator 3)) [ 13.042302][ T0] security_init (security/security.c:475) [ 13.042302][ T0] start_kernel (init/main.c:1085) [ 13.042302][ T0] x86_64_start_reservations (arch/x86/kernel/head64.c:495) [ 13.042302][ T0] x86_64_start_kernel (arch/x86/kernel/head64.c:437 (discriminator 17)) [ 13.042302][ T0] common_startup_64 (arch/x86/kernel/head_64.S:421) [ 13.042302][ T0] [ 13.042302][ T0] ---[ end trace 0000000000000000 ]--- [ 13.044823][ T0] AppArmor: AppArmor initialized [ 13.062176][ T0] Mount-cache hash table entries: 32768 (order: 6, 262144 bytes, linear) [ 13.065846][ T0] Mountpoint-cache hash table entries: 32768 (order: 6, 262144 bytes, linear) The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20240918/202409181358.c07681be-oliver.sang@intel.com -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki