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=?us-ascii?Q?dw=3D=3D?= X-MS-Exchange-CrossTenant-Network-Message-Id: 8446ab1c-6f23-4e61-2d6c-08dcfd56d83b X-MS-Exchange-CrossTenant-AuthSource: LV3PR11MB8603.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Nov 2024 05:01:01.8504 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: SGFRWK/SkS+Hb9NamOIs93XDqkCOyZ6HXfXj7E+L96X4EOUAD1Xb909zKRRSjGSA7Z8SeDqucjAxf8Ku9xz1SA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR11MB6657 X-OriginatorOrg: intel.com Hello, kernel test robot noticed "WARNING:at_kernel/rcu/rcutorture.c:#rcutorture_one_extend_check[rcutorture]" on: commit: 622baf5d79169496973d50fc43636469e6af02b7 ("rcutorture: Make rcutorture_one_extend() check reader state") https://github.com/paulmckrcu/linux dev.2024.11.01a in testcase: rcutorture version: with following parameters: runtime: 300s test: default torture_type: srcu config: i386-randconfig-061-20241103 compiler: gcc-12 test machine: qemu-system-i386 -enable-kvm -cpu SandyBridge -smp 2 -m 4G (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/202411051012.f9224879-lkp@intel.com The kernel config and materials to reproduce are available at: https://download.01.org/0day-ci/archive/20241105/202411051012.f9224879-lkp@intel.com [ 94.499370][ T628] ------------[ cut here ]------------ [ 94.504179][ T628] rcutorture_one_extend_check before change: Current 0x20 To add 0x20 To remove 0x0 [ 94.505405][ T628] WARNING: CPU: 0 PID: 628 at kernel/rcu/rcutorture.c:1876 rcutorture_one_extend_check+0x1ff/0x2ba [rcutorture] [ 94.507176][ T628] Modules linked in: rcutorture(+) torture ata_generic ata_piix mousedev sg intel_agp libata serio_raw intel_gtt agpgart i2c_piix4 rtc_cmos fuse autofs4 [ 94.508995][ T628] CPU: 0 UID: 0 PID: 628 Comm: rcu_torture_rea Not tainted 6.12.0-rc2-00086-g622baf5d7916 #1 [ 94.510118][ T628] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.2-debian-1.16.2-1 04/01/2014 [ 94.521987][ T628] EIP: rcutorture_one_extend_check+0x1ff/0x2ba [rcutorture] [ 94.522990][ T628] Code: 00 00 00 80 3d 9c 84 2c f0 00 75 bd c6 05 9c 84 2c f0 01 57 56 53 68 9b 00 2d f0 68 40 1e 2d f0 68 a9 00 2d f0 e8 82 22 db d0 <0f> 0b 83 c4 18 eb 98 31 c0 89 45 f0 80 3d 9b 84 2c f0 00 75 23 c6 [ 94.525121][ T628] EAX: 00000053 EBX: 00000020 ECX: 00000002 EDX: 00000002 [ 94.525898][ T628] ESI: 00000020 EDI: 00000000 EBP: c77c3dc0 ESP: c77c3d8c [ 94.526758][ T628] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 EFLAGS: 00010246 [ 94.527733][ T628] CR0: 80050033 CR2: b7248000 CR3: 07bc8000 CR4: 000406d0 [ 94.528515][ T628] Call Trace: [ 94.528885][ T628] ? show_regs+0x61/0x67 [ 94.529424][ T628] ? rcutorture_one_extend_check+0x1ff/0x2ba [rcutorture] [ 94.530342][ T628] ? __warn+0x9e/0x151 [ 94.530852][ T628] ? report_bug+0x120/0x19d [ 94.531398][ T628] ? rcutorture_one_extend_check+0x1ff/0x2ba [rcutorture] [ 94.536465][ T628] ? exc_overflow+0x37/0x37 [ 94.537098][ T628] ? handle_bug+0x3d/0x58 [ 94.537683][ T628] ? exc_invalid_op+0x24/0x60 [ 94.538224][ T628] ? handle_exception+0x133/0x133 [ 94.538880][ T628] ? exc_overflow+0x37/0x37 [ 94.539408][ T628] ? rcutorture_one_extend_check+0x1ff/0x2ba [rcutorture] [ 94.540399][ T628] ? exc_overflow+0x37/0x37 [ 94.540940][ T628] ? rcutorture_one_extend_check+0x1ff/0x2ba [rcutorture] [ 94.541903][ T628] rcutorture_one_extend+0x39e/0x3a7 [rcutorture] [ 94.542657][ T628] rcu_torture_one_read+0x7e/0x4d3 [rcutorture] [ 94.543218][ T614] srcu-torture: Creating torture_shuffle task [ 94.543494][ T628] ? __lock_acquire+0x684/0x72e [ 94.544510][ T630] srcu-torture: rcu_torture_stats task started [ 94.545082][ T628] rcu_torture_reader+0xb7/0x16a [rcutorture] [ 94.559381][ T614] srcu-torture: Creating torture_stutter task [ 94.559414][ T640] srcu-torture: torture_shuffle task started [ 94.567377][ T614] srcu-torture: Creating rcu_torture_fwd_prog task [ 94.567413][ T641] srcu-torture: torture_stutter task started [ 94.567748][ T614] srcu-torture: Creating rcu_torture_read_exit task [ 94.567772][ T646] srcu-torture: rcu_torture_fwd_progress task started [ 94.568324][ T647] srcu-torture: rcu_torture_read_exit: Start of test [ 94.568329][ T647] srcu-torture: rcu_torture_read_exit: Start of episode [ 94.587605][ T628] ? rcu_torture_one_read+0x4d3/0x4d3 [rcutorture] [ 94.588336][ T628] kthread+0xe9/0xee [ 94.588796][ T628] ? rcu_torture_cleanup+0x750/0x750 [rcutorture] [ 94.589492][ T628] ? list_del_init+0x21/0x21 [ 94.590015][ T628] ret_from_fork+0x19/0x2c [ 94.590524][ T628] ? list_del_init+0x21/0x21 [ 94.591142][ T628] ret_from_fork_asm+0x12/0x18 [ 94.598922][ T221] 2024-11-04 17:44:01 sleep 300 [ 94.598941][ T221] [ 94.601820][ T628] entry_INT80_32+0x125/0x125 [ 94.602363][ T628] irq event stamp: 621 [ 94.602906][ T628] hardirqs last enabled at (639): [] __up_console_sem+0x59/0x69 [ 94.603896][ T628] hardirqs last disabled at (646): [] __up_console_sem+0x40/0x69 [ 94.604836][ T628] softirqs last enabled at (636): [] handle_softirqs+0x2fb/0x326 [ 94.605797][ T628] softirqs last disabled at (629): [] __do_softirq+0xa/0xc [ 94.613261][ T628] ---[ end trace 0000000000000000 ]--- -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki